Search Results - "Harp, D R"

Using field observations to inform thermal hydrology models of permafrost dynamics with ATS (v0.83) by Atchley, A L, Painter, S L, Harp, D R, Coon, E T, Wilson, C J, Liljedahl, A K, Romanovsky, V E

“…Climate change is profoundly transforming the carbon-rich Arctic tundra landscape, potentially moving it from a carbon sink to a carbon source by increasing…”
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Effect of soil property uncertainties on permafrost thaw projections: a calibration-constrained analysis by Harp, D. R, Atchley, A. L, Painter, S. L, Coon, E. T, Wilson, C. J, Romanovsky, V. E, Rowland, J. C

“…The effects of soil property uncertainties on permafrost thaw projections are studied using a three-phase subsurface thermal hydrology model and…”
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Barometric Pumping Through Fractured Rock: A Mechanism for Venting Deep Methane to Mars' Atmosphere by Ortiz, J. P., Rajaram, H., Stauffer, P. H., Harp, D. R., Wiens, R. C., Lewis, K. W.

“…Both the source of methane on Mars and the mechanism for transmission from the subsurface to the atmosphere are not fully understood. Previous seepage…”
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Regression-based reduced-order models to predict transient thermal output for enhanced geothermal systems by Mudunuru, M.K., Karra, S., Harp, D.R., Guthrie, G.D., Viswanathan, H.S.

“…•Developed computationally inexpensive regression-based ROMs for EGS.•Performed sensitivity analysis to identify and rank key input model parameters.•ROMs are…”
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Sub‐Diurnal Methane Variations on Mars Driven by Barometric Pumping and Planetary Boundary Layer Evolution by Ortiz, J. P., Rajaram, H., Stauffer, P. H., Lewis, K. W., Wiens, R. C., Harp, D. R.

“…In recent years, the Tunable Laser Spectrometer within the Sample Analysis at Mars (TLS‐SAM) instrument on board the Mars Science Laboratory (MSL) Curiosity…”
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Topography Controls Variability in Circumpolar Permafrost Thaw Pond Expansion by Abolt, C. J., Atchley, A. L., Harp, D. R., Jorgenson, M. T., Witharana, C., Bolton, W. R., Schwenk, J., Rettelbach, T., Grosse, G., Boike, J., Nitze, I., Liljedahl, A. K., Rumpca, C. T., Wilson, C. J., Bennett, K. E.

“…One of the most conspicuous signals of climate change in high‐latitude tundra is the expansion of ice wedge thermokarst pools. These small but abundant water…”
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An evaporation estimation model using optimized fuzzy learning from example algorithm with an application to the riparian zone of the Middle Rio Grande in New Mexico, U.S.A by Harp, D.R., Reda Taha, M.M., Stormont, J.C., Farfan, E., Coonrod, J.

“…The existing temperature difference method for estimating soil-water evaporation using infrared thermometry requires the use of simplifying assumptions that…”
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Using SF6 and Xe to Monitor Gas Migration Through Explosion‐Generated Fracture Networks by Stroujkova, A., Gorman, E., Avendaño, S. T., Horne, M., Person, M. A., Hubbard, P., Salerno, J., Carrigan, C. R., Harp, D. R., Stauffer, P. H.

“…We describe a field study where tracer gas was injected into a subsurface cavity created by a small chemical explosion beneath the water table. The main…”
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Regression-based reduced-order models to predict transient thermal output for enhanced geothermal systems by Mudunuru, M. K, Karra, S, Harp, D. R, Guthrie, G. D, Viswanathan, H. S

“…M.K. Mudunuru, S. Karra, D.R. Harp, G.D. Guthrie, H.S. Viswanathan, Regression-based reduced-order models to predict transient thermal output for enhanced…”
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Microtopographic control on the ground thermal regime in ice wedge polygons by Abolt, Charles J, Young, Michael H, Atchley, Adam L, Harp, Dylan R

“…The goal of this research is to constrain the influence of ice wedge polygon microtopography on near-surface ground temperatures. Ice wedge polygon…”
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New insights into the drainage of inundated ice-wedge polygons using fundamental hydrologic principles by Harp, Dylan R, Zlotnik, Vitaly, Abolt, Charles J, Busey, Bob, Avendaño, Sofia T, Newman, Brent D, Atchley, Adam L, Jafarov, Elchin, Wilson, Cathy J, Bennett, Katrina E

“…The pathways and timing of drainage from the inundated centers of ice-wedge polygons in a warming climate have important implications for carbon flushing,…”
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Estimation of subsurface porosities and thermal conductivities of polygonal tundra by coupled inversion of electrical resistivity, temperature, and moisture content data by Jafarov, Elchin E, Harp, Dylan R, Coon, Ethan T, Dafflon, Baptiste, Tran, Anh Phuong, Atchley, Adam L, Lin, Youzuo, Wilson, Cathy J

“…Studies indicate greenhouse gas emissions following permafrost thaw will amplify current rates of atmospheric warming, a process referred to as the permafrost…”
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Using SF 6 and Xe to Monitor Gas Migration Through Explosion‐Generated Fracture Networks by Stroujkova, A., Gorman, E., Avendaño, S. T., Horne, M., Person, M. A., Hubbard, P., Salerno, J., Carrigan, C. R., Harp, D. R., Stauffer, P. H.

“…Abstract We describe a field study where tracer gas was injected into a subsurface cavity created by a small chemical explosion beneath the water table. The…”
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