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• 1. [Article] Geothermics and climate change : 2. joint analysis of borehole temperature and meteorological data

  copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Geothermics and climate change : 2. joint analysis of borehole temperature and meteorological data Author: Chapman, David S., Harris, Robert N. copyrighted by American Geophysical Union Title: Geothermics and climate change : 2. joint analysis of borehole temperature and meteorological data Author: Chapman, David S., Harris, Robert N. copyrighted by American Geophysical Union Close

• 2. [Article] Repeat temperature measurements in boreholes from northwestern Utah link ground and air temperature changes at the decadal time scale

  Borehole temperature profiles provide a record of ground surface temperature (GST) change at the decadal to centennial time scale. GST histories reconstructed from boreholes are particularly useful in ...

  Citation × Citation Citation Abstract Copy Title: Repeat temperature measurements in boreholes from northwestern Utah link ground and air temperature changes at the decadal time scale Author: Chapman, David S., Harris, Robert N., Davis, Michael G. Borehole temperature profiles provide a record of ground surface temperature (GST) change at the decadal to centennial time scale. GST histories reconstructed from boreholes are particularly useful in climate reconstruction if changes in GST and surface air temperature (SAT) are effectively coupled at decadal and longer time periods and it can be shown that borehole temperatures respond faithfully to surface temperature changes. We test these assumptions using three boreholes in northwestern Utah that have been repeatedly logged for temperature over a time span of 29 years. We report 13 temperaturedepth logs at the Emigrant Pass Observatory borehole GC‐1, eight at borehole SI‐1 and five at borehole DM‐1, acquired between 1978 and 2007. Systematic subsurface temperature changes of up to 0.6°C are observed over this time span in the upper sections of the boreholes; below approximately 100 m any temperature transients are within observational noise. We difference the temperature logs to highlight subsurface transients and to remove any ambiguity resulting from steady state source of curvature. Synthetic temperature profiles computed from SAT data at nearby meteorological stations reproduce both the amplitude and pattern of the transient temperature observations, fitting the observations to within 0.03°C or better. This observational confirmation of the strong coupling between surface temperature change and borehole temperature transients lends further support to the use of borehole temperatures to complement SAT and multiproxy reconstructions of climate change. Title: Repeat temperature measurements in boreholes from northwestern Utah link ground and air temperature changes at the decadal time scale Author: Chapman, David S., Harris, Robert N., Davis, Michael G. Borehole temperature profiles provide a record of ground surface temperature (GST) change at the decadal to centennial time scale. GST histories reconstructed from boreholes are particularly useful in climate reconstruction if changes in GST and surface air temperature (SAT) are effectively coupled at decadal and longer time periods and it can be shown that borehole temperatures respond faithfully to surface temperature changes. We test these assumptions using three boreholes in northwestern Utah that have been repeatedly logged for temperature over a time span of 29 years. We report 13 temperaturedepth logs at the Emigrant Pass Observatory borehole GC‐1, eight at borehole SI‐1 and five at borehole DM‐1, acquired between 1978 and 2007. Systematic subsurface temperature changes of up to 0.6°C are observed over this time span in the upper sections of the boreholes; below approximately 100 m any temperature transients are within observational noise. We difference the temperature logs to highlight subsurface transients and to remove any ambiguity resulting from steady state source of curvature. Synthetic temperature profiles computed from SAT data at nearby meteorological stations reproduce both the amplitude and pattern of the transient temperature observations, fitting the observations to within 0.03°C or better. This observational confirmation of the strong coupling between surface temperature change and borehole temperature transients lends further support to the use of borehole temperatures to complement SAT and multiproxy reconstructions of climate change. Close

• 3. [Article] Long-term tracking of climate change by underground temperatures

  Copyrighted by American Geophysical Union.

  Citation × Citation Citation Abstract Copy Title: Long-term tracking of climate change by underground temperatures Author: Harris, Robert N., Ferguson, Grant, Beltrami, Hugo Copyrighted by American Geophysical Union. Title: Long-term tracking of climate change by underground temperatures Author: Harris, Robert N., Ferguson, Grant, Beltrami, Hugo Copyrighted by American Geophysical Union. Close

• 4. [Article] Mid-Latitude (30°–60° N) climatic warming inferred by combining borehole temperatures with surface air temperatures

  copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Mid-Latitude (30°–60° N) climatic warming inferred by combining borehole temperatures with surface air temperatures Author: Harris, Robert N., Chapman, David S. copyrighted by American Geophysical Union Title: Mid-Latitude (30°–60° N) climatic warming inferred by combining borehole temperatures with surface air temperatures Author: Harris, Robert N., Chapman, David S. copyrighted by American Geophysical Union Close

• 5. [Article] Climate change in India inferred from geothermal observations

  copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Climate change in India inferred from geothermal observations Author: Harris, Robert N., Rao, R. U. M., Roy, Sukanta, Chapman, David S. copyrighted by American Geophysical Union Title: Climate change in India inferred from geothermal observations Author: Harris, Robert N., Rao, R. U. M., Roy, Sukanta, Chapman, David S. copyrighted by American Geophysical Union Close

• 6. [Article] Repeat temperature measurements in borehole GC-1, northwestern Utah: towards isolating a climate-change signal borehole temperature profiles

  Copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Repeat temperature measurements in borehole GC-1, northwestern Utah: towards isolating a climate-change signal borehole temperature profiles Author: Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union Title: Repeat temperature measurements in borehole GC-1, northwestern Utah: towards isolating a climate-change signal borehole temperature profiles Author: Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union Close

• 7. [Article] Borehole temperatures and tree rings: Seasonality and estimates of extratropical Northern Hemispheric warming

  Copyrighted by American Geophysical Union.

  Citation × Citation Citation Abstract Copy Title: Borehole temperatures and tree rings: Seasonality and estimates of extratropical Northern Hemispheric warming Author: Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union. Title: Borehole temperatures and tree rings: Seasonality and estimates of extratropical Northern Hemispheric warming Author: Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union. Close

• 8. [Article] Snow and the ground temperature record of climate change

  Copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Snow and the ground temperature record of climate change Author: Bartlett, Marshall G., Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union Title: Snow and the ground temperature record of climate change Author: Bartlett, Marshall G., Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union Close

• 9. [Article] Climate change on the Colorado Plateau of eastern Utah inferred from borehole temperatures

  copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Climate change on the Colorado Plateau of eastern Utah inferred from borehole temperatures Author: Chapman, David S., Harris, Robert N. copyrighted by American Geophysical Union Title: Climate change on the Colorado Plateau of eastern Utah inferred from borehole temperatures Author: Chapman, David S., Harris, Robert N. copyrighted by American Geophysical Union Close

• 10. [Article] A Decade of Ground–Air Temperature Tracking at Emigrant Pass Observatory, Utah

  Observations of air and ground temperatures collected between 1993 and 2004 from Emigrant Pass Geothermal Climate Observatory in northwestern Utah are analyzed to understand the relationship between these ...

  Citation × Citation Citation Abstract Copy Title: A Decade of Ground–Air Temperature Tracking at Emigrant Pass Observatory, Utah Author: Bartlett, Marshall G., Chapman, David S., Harris, Robert N. Observations of air and ground temperatures collected between 1993 and 2004 from Emigrant Pass Geothermal Climate Observatory in northwestern Utah are analyzed to understand the relationship between these two quantities. The influence of surface air temperature (SAT), incident solar radiation, and snow cover on surface ground temperature (SGT) variations are explored. SAT variations explain 94% of the variance in SGT. Incident solar radiation is the primary variable governing the remaining variance misfit and is significantly more important during summer months than winter months. A linear relationship between the ground–air temperature difference (ΔT[subscript]sgt-sat) and solar radiation exists with a trend of 1.21 K/(100 W m⁻²); solar radiation accounts for 1.3% of the variance in SGT. The effects of incident solar radiation also account for the 2.47-K average offset in ΔT[subscript]sgt-sat. During the winter, snow cover plays a role in governing SGT variability, but exerts only a minor influence on the annual tracking of ground and air temperatures at the site, accounting for 0.5% of the variance in SGT. These observations of the tracking of SGT and SAT confirm that borehole temperature changes mimic changes in SAT at frequencies appropriate for climatic reconstructions. Title: A Decade of Ground–Air Temperature Tracking at Emigrant Pass Observatory, Utah Author: Bartlett, Marshall G., Chapman, David S., Harris, Robert N. Observations of air and ground temperatures collected between 1993 and 2004 from Emigrant Pass Geothermal Climate Observatory in northwestern Utah are analyzed to understand the relationship between these two quantities. The influence of surface air temperature (SAT), incident solar radiation, and snow cover on surface ground temperature (SGT) variations are explored. SAT variations explain 94% of the variance in SGT. Incident solar radiation is the primary variable governing the remaining variance misfit and is significantly more important during summer months than winter months. A linear relationship between the ground–air temperature difference (ΔT[subscript]sgt-sat) and solar radiation exists with a trend of 1.21 K/(100 W m⁻²); solar radiation accounts for 1.3% of the variance in SGT. The effects of incident solar radiation also account for the 2.47-K average offset in ΔT[subscript]sgt-sat. During the winter, snow cover plays a role in governing SGT variability, but exerts only a minor influence on the annual tracking of ground and air temperatures at the site, accounting for 0.5% of the variance in SGT. These observations of the tracking of SGT and SAT confirm that borehole temperature changes mimic changes in SAT at frequencies appropriate for climatic reconstructions. Close

• 11. [Article] Long-term temperature records following the M[subscript w] 7.9 Wenchuan (China) earthquake are consistent with low friction

  This is the publisher’s final pdf. The published article is copyrighted by the Geological Society of America and can be found at: http://geology.gsapubs.org/.

  Citation × Citation Citation Abstract Copy Title: Long-term temperature records following the M[subscript w] 7.9 Wenchuan (China) earthquake are consistent with low friction Author: Brodsky, Emily E., Xue, Lian, et al., Li, Haibing, Harris, Robert N. This is the publisher’s final pdf. The published article is copyrighted by the Geological Society of America and can be found at: http://geology.gsapubs.org/. Title: Long-term temperature records following the M[subscript w] 7.9 Wenchuan (China) earthquake are consistent with low friction Author: Brodsky, Emily E., Xue, Lian, et al., Li, Haibing, Harris, Robert N. This is the publisher’s final pdf. The published article is copyrighted by the Geological Society of America and can be found at: http://geology.gsapubs.org/. Close

• 12. [Article] Variations in air and ground temperature and the POM-SAT model: Results from the Northern Hemisphere

  The POM-SAT model for comparing air and ground temperatures is based on the supposition that surface air temperature (SAT) records provide a good prediction of thermal transients in the shallow subsurface ...

  Citation × Citation Citation Abstract Copy Title: Variations in air and ground temperature and the POM-SAT model: Results from the Northern Hemisphere Author: Harris, Robert N. The POM-SAT model for comparing air and ground temperatures is based on the supposition that surface air temperature (SAT) records provide a good prediction of thermal transients in the shallow subsurface of the Earth. This model consists of two components, the forcing function and an initial condition, termed the pre-observational mean (POM). I explore the sensitivity of this model as a function of forcing periods at time scales appropriate for climate reconstructions. Synthetic models are designed to replicate comparisons between borehole temperatures contained in the global database of temperature profiles for climate reconstructions and gridded SAT data. I find that the root mean square (RMS) misfit between forcing functions and transient temperature profiles in the subsurface are sensitive to periods longer than about 50 years, are a maximum when the period and the 150-year time series are equal and then decreases for longer periods. The magnitude of the POM is a robust parameter for periods equal to or shorter than the length of this time series. At longer periods there is a tradeoff between the amplitude of the forcing function and the POM. These tests provide guidelines for assessing comparisons between air and ground temperatures at periods appropriate for climate reconstructions. The sensitivity of comparisons between the average Northern Hemisphere gridded SAT record and subsurface temperature-depth profile as a function of forcing period is assessed. This analysis indicates that the Northern Hemisphere extratropical average SAT and reduced temperature-depth profile are in good agreement. By adding modest heat to the subsurface at intermediate periods some improvement in misfit can be made, but this extra heat has negligible influence on the POM. The joint analysis of borehole temperatures and SAT records indicate warming of about 1.1°C over the last 500 years, consistent with previous studies. Title: Variations in air and ground temperature and the POM-SAT model: Results from the Northern Hemisphere Author: Harris, Robert N. The POM-SAT model for comparing air and ground temperatures is based on the supposition that surface air temperature (SAT) records provide a good prediction of thermal transients in the shallow subsurface of the Earth. This model consists of two components, the forcing function and an initial condition, termed the pre-observational mean (POM). I explore the sensitivity of this model as a function of forcing periods at time scales appropriate for climate reconstructions. Synthetic models are designed to replicate comparisons between borehole temperatures contained in the global database of temperature profiles for climate reconstructions and gridded SAT data. I find that the root mean square (RMS) misfit between forcing functions and transient temperature profiles in the subsurface are sensitive to periods longer than about 50 years, are a maximum when the period and the 150-year time series are equal and then decreases for longer periods. The magnitude of the POM is a robust parameter for periods equal to or shorter than the length of this time series. At longer periods there is a tradeoff between the amplitude of the forcing function and the POM. These tests provide guidelines for assessing comparisons between air and ground temperatures at periods appropriate for climate reconstructions. The sensitivity of comparisons between the average Northern Hemisphere gridded SAT record and subsurface temperature-depth profile as a function of forcing period is assessed. This analysis indicates that the Northern Hemisphere extratropical average SAT and reduced temperature-depth profile are in good agreement. By adding modest heat to the subsurface at intermediate periods some improvement in misfit can be made, but this extra heat has negligible influence on the POM. The joint analysis of borehole temperatures and SAT records indicate warming of about 1.1°C over the last 500 years, consistent with previous studies. Close

• 13. [Article] Climate change on the Colorado Plateau of eastern Utah inferred from borehole temperatures

  Copyrighted by American Geophysical Union.

  Citation × Citation Citation Abstract Copy Title: Climate change on the Colorado Plateau of eastern Utah inferred from borehole temperatures Author: Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union. Title: Climate change on the Colorado Plateau of eastern Utah inferred from borehole temperatures Author: Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union. Close

• 14. [Article] Geothermics and climate change : 1. Analysis of borehole temperatures with emphasis on resolving power

  copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Geothermics and climate change : 1. Analysis of borehole temperatures with emphasis on resolving power Author: Harris, Robert N., Chapman, David S. copyrighted by American Geophysical Union Title: Geothermics and climate change : 1. Analysis of borehole temperatures with emphasis on resolving power Author: Harris, Robert N., Chapman, David S. copyrighted by American Geophysical Union Close

• 15. [Article] Reply to comment by T.J. Osborn and K.R. Briffa on "Mid-latitude (30°-60°N) climatic warming inferred by combining borehole temperatures with surface air temperatures"

  Citation × Citation Citation Abstract Copy Title: Reply to comment by T.J. Osborn and K.R. Briffa on "Mid-latitude (30°-60°N) climatic warming inferred by combining borehole temperatures with surface air temperatures" Author: Chapman, David S., Harris, Robert N. Title: Reply to comment by T.J. Osborn and K.R. Briffa on "Mid-latitude (30°-60°N) climatic warming inferred by combining borehole temperatures with surface air temperatures" Author: Chapman, David S., Harris, Robert N. Close

• 16. [Article] Does hydrologic circulation mask frictional heat on faults after large earthquakes?

  Knowledge of frictional resistance along faults is important for understanding the mechanics of earthquakes and faulting. The clearest in situ measure of fault friction potentially comes from temperature ...

  Citation × Citation Citation Abstract Copy Title: Does hydrologic circulation mask frictional heat on faults after large earthquakes? Author: Brodsky, Emily E., Saffer, Demian M., Fulton, Patrick M., Harris, Robert N. Knowledge of frictional resistance along faults is important for understanding the mechanics of earthquakes and faulting. The clearest in situ measure of fault friction potentially comes from temperature measurements in boreholes crossing fault zones within a few years of rupture. However, large temperature signals from frictional heating on faults have not been observed. Unambiguously interpreting the coseismic frictional resistance from small thermal perturbations observed in borehole temperature profiles requires assessing the impact of other potentially confounding thermal processes. We address several issues associated with quantifying the temperature signal of frictional heating including transient fluid flow associated with the earthquake, thermal disturbance caused by borehole drilling, and heterogeneous thermal physical rock properties. Transient fluid flow is investigated using a two‐dimensional coupled fluid flow and heat transport model to evaluate the temperature field following an earthquake. Simulations for a range of realistic permeability, frictional heating, and pore pressure scenarios show that high permeabilities (>10−14 m2) are necessary for significant advection within the several years after an earthquake and suggest that transient fluid flow is unlikely to mask frictional heat anomalies. We illustrate how disturbances from circulating fluids during drilling diffuse quickly leaving a robust signature of frictional heating. Finally, we discuss the utility of repeated borehole temperature profiles for discriminating between different interpretations of thermal perturbations. Our results suggest that temperature anomalies from even low friction should be detectable at depths >1 km 1 to 2 years after a large earthquake and that interpretations of low friction from existing data are likely robust. Title: Does hydrologic circulation mask frictional heat on faults after large earthquakes? Author: Brodsky, Emily E., Saffer, Demian M., Fulton, Patrick M., Harris, Robert N. Knowledge of frictional resistance along faults is important for understanding the mechanics of earthquakes and faulting. The clearest in situ measure of fault friction potentially comes from temperature measurements in boreholes crossing fault zones within a few years of rupture. However, large temperature signals from frictional heating on faults have not been observed. Unambiguously interpreting the coseismic frictional resistance from small thermal perturbations observed in borehole temperature profiles requires assessing the impact of other potentially confounding thermal processes. We address several issues associated with quantifying the temperature signal of frictional heating including transient fluid flow associated with the earthquake, thermal disturbance caused by borehole drilling, and heterogeneous thermal physical rock properties. Transient fluid flow is investigated using a two‐dimensional coupled fluid flow and heat transport model to evaluate the temperature field following an earthquake. Simulations for a range of realistic permeability, frictional heating, and pore pressure scenarios show that high permeabilities (>10−14 m2) are necessary for significant advection within the several years after an earthquake and suggest that transient fluid flow is unlikely to mask frictional heat anomalies. We illustrate how disturbances from circulating fluids during drilling diffuse quickly leaving a robust signature of frictional heating. Finally, we discuss the utility of repeated borehole temperature profiles for discriminating between different interpretations of thermal perturbations. Our results suggest that temperature anomalies from even low friction should be detectable at depths >1 km 1 to 2 years after a large earthquake and that interpretations of low friction from existing data are likely robust. Close

• 17. [Article] Snow effect on North American ground temperatures, 1950-2002

  Copyrighted by American Geophysical Union.

  Citation × Citation Citation Abstract Copy Title: Snow effect on North American ground temperatures, 1950-2002 Author: Bartlett, Marshall G., Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union. Title: Snow effect on North American ground temperatures, 1950-2002 Author: Bartlett, Marshall G., Chapman, David S., Harris, Robert N. Copyrighted by American Geophysical Union. Close

• 18. [Article] Noble gases and coupled heat/fluid flow modeling for evaluating hydrogeologic conditions of volcanic island aquifers

  This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/journal-of-hydrology/. To the best of our knowledge, one or more ...

  Citation × Citation Citation Abstract Copy Title: Noble gases and coupled heat/fluid flow modeling for evaluating hydrogeologic conditions of volcanic island aquifers Author: Harris, Robert N., Healy, Richard W., Heilweil, Victor M. This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/journal-of-hydrology/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Title: Noble gases and coupled heat/fluid flow modeling for evaluating hydrogeologic conditions of volcanic island aquifers Author: Harris, Robert N., Healy, Richard W., Heilweil, Victor M. This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/journal-of-hydrology/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Close

• 19. [Article] Thermal regime of the Costa Rican convergent margin: 2. Thermal models of the shallow Middle America subduction zone offshore Costa Rica

  At the Costa Rica margin along the Middle America Trench along‐strike variations in heat flow are well mapped. These variations can be understood in terms of either ventilated fluid flow, where exposed ...

  Citation × Citation Citation Abstract Copy Title: Thermal regime of the Costa Rican convergent margin: 2. Thermal models of the shallow Middle America subduction zone offshore Costa Rica Author: Ranero, César R., Spinelli, Glenn, Harris, Robert N. At the Costa Rica margin along the Middle America Trench along‐strike variations in heat flow are well mapped. These variations can be understood in terms of either ventilated fluid flow, where exposed basement allows fluids to freely advect heat between the crustal aquifer and ocean, or insulated fluid flow where continuous sediment cover restricts heat advection to within the crustal aquifer. We model fluid flow within the subducting aquifer using Nusselt number approximations coupled with finite element models of subduction and explore its effect on temperatures along the subduction thrust. The sensitivity of these models to the initial thermal state of the plate and styles of fluid flow, either ventilated or insulated, is explored. Heat flow measurements on cool crust accreted at the East Pacific Rise are consistent with ventilated hydrothermal cooling that continues with subduction. These models yield much cooler temperatures than predicted from simulations initialized with conductive predictions and without hydrothermal circulation. Heat flow transects on warm crust accreted at the Cocos‐Nazca spreading center are consistent with models of insulated hydrothermal circulation that advects heat updip within the subducting crustal aquifer. Near the trench these models are warmer than conductive predictions and cooler than conductive predictions downdip of the trench. Comparisons between microseismicity and modeled isotherms suggest that the updip limit of microseismicity occurs at temperatures warmer than 100°C and that the downdip extent of microseismicity is bounded by the intersection of the subduction thrust with the base of the overriding crust. Title: Thermal regime of the Costa Rican convergent margin: 2. Thermal models of the shallow Middle America subduction zone offshore Costa Rica Author: Ranero, César R., Spinelli, Glenn, Harris, Robert N. At the Costa Rica margin along the Middle America Trench along‐strike variations in heat flow are well mapped. These variations can be understood in terms of either ventilated fluid flow, where exposed basement allows fluids to freely advect heat between the crustal aquifer and ocean, or insulated fluid flow where continuous sediment cover restricts heat advection to within the crustal aquifer. We model fluid flow within the subducting aquifer using Nusselt number approximations coupled with finite element models of subduction and explore its effect on temperatures along the subduction thrust. The sensitivity of these models to the initial thermal state of the plate and styles of fluid flow, either ventilated or insulated, is explored. Heat flow measurements on cool crust accreted at the East Pacific Rise are consistent with ventilated hydrothermal cooling that continues with subduction. These models yield much cooler temperatures than predicted from simulations initialized with conductive predictions and without hydrothermal circulation. Heat flow transects on warm crust accreted at the Cocos‐Nazca spreading center are consistent with models of insulated hydrothermal circulation that advects heat updip within the subducting crustal aquifer. Near the trench these models are warmer than conductive predictions and cooler than conductive predictions downdip of the trench. Comparisons between microseismicity and modeled isotherms suggest that the updip limit of microseismicity occurs at temperatures warmer than 100°C and that the downdip extent of microseismicity is bounded by the intersection of the subduction thrust with the base of the overriding crust. Close

• 20. [Article] Thermal conductivities, thermal diffusivities, and volumetric heat capacities of core samples obtained from the Japan Trench Fast Drilling Project (JFAST)

  This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Springer. The published article can be found at: http://www.earth-planets-space.com/.

  Citation × Citation Citation Abstract Copy Title: Thermal conductivities, thermal diffusivities, and volumetric heat capacities of core samples obtained from the Japan Trench Fast Drilling Project (JFAST) Author: Kinoshita, Masataka, Tanikawa, Wataru, Lin, Weiren, Tadai, Osamu, Matsubayashi, Osamu, Fulton, Patrick M., Harris, Robert N. This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Springer. The published article can be found at: http://www.earth-planets-space.com/. Title: Thermal conductivities, thermal diffusivities, and volumetric heat capacities of core samples obtained from the Japan Trench Fast Drilling Project (JFAST) Author: Kinoshita, Masataka, Tanikawa, Wataru, Lin, Weiren, Tadai, Osamu, Matsubayashi, Osamu, Fulton, Patrick M., Harris, Robert N. This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Springer. The published article can be found at: http://www.earth-planets-space.com/. Close

• 21. [Article] Thermal models of the Middle America Trench at the Nicoya Peninsula, Costa Rica

  copyrighted by American Geophysical Union

  Citation × Citation Citation Abstract Copy Title: Thermal models of the Middle America Trench at the Nicoya Peninsula, Costa Rica Author: Harris, Robert N., Wang, Kelin copyrighted by American Geophysical Union Title: Thermal models of the Middle America Trench at the Nicoya Peninsula, Costa Rica Author: Harris, Robert N., Wang, Kelin copyrighted by American Geophysical Union Close

• 22. [Article] Heat flow along the NanTroSEIZE transect: Results from IODP Expeditions 315 and 316 offshore the Kii Peninsula, Japan

  [1] We report detailed thermal measurements undertaken during Integrated Ocean Drilling Program (IODP) Expeditions 315 and 316 along the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) transect offshore ...

  Citation × Citation Citation Abstract Copy Title: Heat flow along the NanTroSEIZE transect: Results from IODP Expeditions 315 and 316 offshore the Kii Peninsula, Japan Author: Schmidt‐Schierhorn, Friederike, Spinelli, Glenn, Harris, Robert N. [1] We report detailed thermal measurements undertaken during Integrated Ocean Drilling Program (IODP) Expeditions 315 and 316 along the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) transect offshore the Kii Peninsula, Japan. Geothermal objectives included determining thermophysical rock properties of the cored material and characterizing the background thermal regime along this transect. New thermal conductivity measurements made with a divided bar are reported and supplement shipboard full‐ and half‐space thermal conductivity measurements for a total of 938 thermal conductivity measurements. Thermal conductivity varies between about 1.0 W m⁻¹ K⁻¹ near the seafloor to 1.6 W m⁻¹ K⁻¹ at a depth of 1 km. Thermal conductivity generally increases with depth and correlates with variations in porosity and lithology. Thermal gradients along the transect are characterized by 48 sediment temperature measurements from 6 sites. Thermal corrections for the effects of bathymetric relief and sedimentation improve the confidence with which the heat flow values can be interpreted. Heat flow generally decreases with landward distance from the deformation front and varies from 70 mW m⁻² just landward of the deformation front to 54 mW m⁻² at sites characterizing the outer fore‐arc high and to 57 mW m⁻² at the Kumano Basin Site. IODP heat flow measurements are significantly lower than nearby seafloor heat flow measurements. This difference is most likely due to variations in bottom water temperature that have a large effect on values of seafloor heat flow. Thus the heat flow of the Nankai accretionary prism is lower than previously thought. We present thermal models of subduction along this transect and explore the impact of the initial geotherm. Conductive plate cooling based on the age of subducting seafloor (20 Myr) under predicts the observed heat flow. We find a good fit to the data using a geotherm appropriate for 10 Myr seafloor. The extra heat is interpreted in terms of back‐arc thermal environments. Title: Heat flow along the NanTroSEIZE transect: Results from IODP Expeditions 315 and 316 offshore the Kii Peninsula, Japan Author: Schmidt‐Schierhorn, Friederike, Spinelli, Glenn, Harris, Robert N. [1] We report detailed thermal measurements undertaken during Integrated Ocean Drilling Program (IODP) Expeditions 315 and 316 along the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) transect offshore the Kii Peninsula, Japan. Geothermal objectives included determining thermophysical rock properties of the cored material and characterizing the background thermal regime along this transect. New thermal conductivity measurements made with a divided bar are reported and supplement shipboard full‐ and half‐space thermal conductivity measurements for a total of 938 thermal conductivity measurements. Thermal conductivity varies between about 1.0 W m⁻¹ K⁻¹ near the seafloor to 1.6 W m⁻¹ K⁻¹ at a depth of 1 km. Thermal conductivity generally increases with depth and correlates with variations in porosity and lithology. Thermal gradients along the transect are characterized by 48 sediment temperature measurements from 6 sites. Thermal corrections for the effects of bathymetric relief and sedimentation improve the confidence with which the heat flow values can be interpreted. Heat flow generally decreases with landward distance from the deformation front and varies from 70 mW m⁻² just landward of the deformation front to 54 mW m⁻² at sites characterizing the outer fore‐arc high and to 57 mW m⁻² at the Kumano Basin Site. IODP heat flow measurements are significantly lower than nearby seafloor heat flow measurements. This difference is most likely due to variations in bottom water temperature that have a large effect on values of seafloor heat flow. Thus the heat flow of the Nankai accretionary prism is lower than previously thought. We present thermal models of subduction along this transect and explore the impact of the initial geotherm. Conductive plate cooling based on the age of subducting seafloor (20 Myr) under predicts the observed heat flow. We find a good fit to the data using a geotherm appropriate for 10 Myr seafloor. The extra heat is interpreted in terms of back‐arc thermal environments. Close

• 23. [Article] Heat flow in vapor dominated areas of the Yellowstone Plateau Volcanic Field: Implications for the thermal budget of the Yellowstone Caldera

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. To the best of our knowledge, one or more ...

  Citation × Citation Citation Abstract Copy Title: Heat flow in vapor dominated areas of the Yellowstone Plateau Volcanic Field: Implications for the thermal budget of the Yellowstone Caldera Author: Harris, Robert N., Werner, Cynthia A., Murphy, Fred, Hurwitz, Shaul This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Title: Heat flow in vapor dominated areas of the Yellowstone Plateau Volcanic Field: Implications for the thermal budget of the Yellowstone Caldera Author: Harris, Robert N., Werner, Cynthia A., Murphy, Fred, Hurwitz, Shaul This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Close

• 24. [Article] Hydrogeological responses to incoming materials at the erosional subduction margin, offshore Osa Peninsula, Costa Rica

  This is the publisher’s final pdf. The article is copyrighted by American Geophysical Union and published by John Wiley & Sons, Inc. It can be found at: http://agupubs.onlinelibrary.wiley.com/agu/jour...

  Citation × Citation Citation Abstract Copy Title: Hydrogeological responses to incoming materials at the erosional subduction margin, offshore Osa Peninsula, Costa Rica Author: Kameda, Jun, Harris, Robert N., Shimizu, Mayuko, et al. This is the publisher’s final pdf. The article is copyrighted by American Geophysical Union and published by John Wiley & Sons, Inc. It can be found at: http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/%28ISSN%291525-2027/ Title: Hydrogeological responses to incoming materials at the erosional subduction margin, offshore Osa Peninsula, Costa Rica Author: Kameda, Jun, Harris, Robert N., Shimizu, Mayuko, et al. This is the publisher’s final pdf. The article is copyrighted by American Geophysical Union and published by John Wiley & Sons, Inc. It can be found at: http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/%28ISSN%291525-2027/ Close