Todd Gregory Caldwell, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 13
Soil resources influence vegetation and response to fire and fire-surrogate treatments in sagebrush-steppe ecosystems Soil resources influence vegetation and response to fire and fire-surrogate treatments in sagebrush-steppe ecosystems
Current paradigm suggests that spatial and temporal competition for resources limit an exotic invader, cheatgrass (Bromus tectorum L.), which once established, alters fire regimes and can result in annual grass dominance in sagebrush steppe. Prescribed fire and fire surrogate treatments (mowing, tebuthiuron, and imazapic) are used to reduce woody fuels and increase resistance to exotic...
Authors
Benjamin M. Rau, Jeanne C. Chambers, David A. Pyke, Bruce A. Roundy, Eugene W. Schupp, Paul Doescher, Todd G. Caldwell
Non-USGS Publications**
Caldwell, T. G., B. D. Wolaver, T. Bongiovanni, J. P. Pierre, S. Robertson, C. Abolt, and B. R. Scanlon (2020), Spring discharge and thermal regime of a groundwater dependent ecosystem in an arid karst environment, Journal of Hydrology, 10.1016/j.jhydrol.2020.124947.
Colliander, A., T. J. Jackson, A. Berg, D. D. Bosch, T. Caldwell, S. Chan, M. H. Cosh, C. H. Collins, J. Martínez-Fernández, H. McNairn, J. H. Prueger, P. J. Starks, J. P. Walker, and S. H. Yueh (2020), Effect of Rainfall Events on SMAP Radiometer-Based Soil Moisture Accuracy Using Core Validation Sites, Journal of Hydrometeorology, 21, 255-264, 10.1175/jhm-d-19-0122.1.
Chaubell, M. J., J. Asanuma, A. A. Berg, D. D. Bosch, T. Caldwell, M. H. Cosh, C. H. Collins, J. Martinez-Fernandez, M. Seyfried, P. J. Starks, Z. Su, S. H. Yueh, M. Thibeault, J. Walker, R. S. Dunbar, A. Colliander, F. Chen, S. K. Chan, D. Entekhabi, R. Bindlish, and P. E. O'Neill (2020), Improved SMAP Dual-Channel Algorithm for the Retrieval of Soil Moisture, IEEE Transactions on Geoscience and Remote Sensing, 1-12, doi: 10.1109/tgrs.2019.2959239.
Gholoubi, A., H. Emami, and T. Caldwell (2019), Deforestation effects on soil aggregate stability quantified by the high energy moisture characteristic method, Geoderma, 355, 113919, 10.1016/j.geoderma.2019.113919.
Mayes, K. B., G. R. Wilde, M. E. McGarrity, B. Wolaver, and T. G. Caldwell (2019), Watershed-Scale Conservation of Native Fishes in the Brazos River Basin, Texas, in Multispecies and Watershed Approaches to Freshwater Fish Conservation, edited by D. C. Dauwalter, T. Birdson and G. P. Garret, pp. 315–343, American Fisheries Society Symposia 91, Bethesda, MD.
Robertson, S., B. Wolaver, T. G. Caldwell, T. Birdson, R. Smith, T. Hardy, J. Lewey, and J. Joplin (2019), A multidisciplinary approach to developing the science and public support needed to maintain instream flows in the Devils River Basin, Texas, in Multispecies and Watershed Approaches to Freshwater Fish Conservation, edited by D. C. Dauwalter, T. Birdson and G. P. Garret, pp. 293–314, American Fisheries Society Symposia 91, Bethesda, MD.
Das, N. N., D. Entekhabi, R. S. Dunbar, M. J. Chaubell, A. Colliander, S. Yueh, T. Jagdhuber, F. Chen, W. Crow, P. E. O'Neill, J. P. Walker, A. Berg, D. D. Bosch, T. Caldwell, M. H. Cosh, C. H. Collins, E. Lopez-Baeza, and M. Thibeault (2019), The SMAP and Copernicus Sentinel 1A/B microwave active-passive high resolution surface soil moisture product, Remote Sensing of Environment, 233, 111380, 10.1016/j.rse.2019.111380.
Caldwell, T. G., T. Bongiovanni, M. H. Cosh, T. J. Jackson, A. Colliander, C. J. Abolt, R. Casteel, T. Larson, B. R. Scanlon, and M. H. Young (2019), The Texas Soil Observation Network: A comprehensive soil moisture dataset for remote sensing and land surface model validation, Vadose Zone Journal, 18:100034, doi:10.2136/vzj2019.04.0034.
Sun, A. Y., Y. L. Xia, T. G. Caldwell, and Z. C. Hao (2018), Patterns of precipitation and soil moisture extremes in Texas, US: A complex network analysis, Advances in Water Resources, 112, 203-213, 10.1016/j.advwatres.2017.12.019.
Kolassa, J., R. H. Reichle, Q. Liu, S. H. Alemohammad, P. Gentine, K. Aida, J. Asanuma, S. Bircher, T. Caldwell, A. Colliander, M. Cosh, C. Holifield Collins, T. J. Jackson, J. Martínez-Fernández, H. McNairn, A. Pacheco, M. Thibeault, and J. P. Walker (2018), Estimating surface soil moisture from SMAP observations using a Neural Network technique, Remote Sensing of Environment, 204, 43-59, doi: 10.1016/j.rse.2017.10.045.
Das, N. N., D. Entekhabi, R. S. Dunbar, A. Colliander, F. Chen, W. Crow, T. J. Jackson, A. Berg, D. D. Bosch, T. Caldwell, M. H. Cosh, C. H. Collins, E. Lopez-Baeza, M. Moghaddam, T. Rowlandson, P. J. Starks, M. Thibeault, J. P. Walker, X. L. Wu, P. E. O'Neill, S. Yueh, and E. G. Njoku (2018), The SMAP mission combined active-passive soil moisture product at 9 km and 3 km spatial resolutions, Remote Sensing of Environment, 211, 204-217, doi:10.1016/j.rse.2018.04.011.
Colliander, A., T. J. Jackson, S. K. Chan, P. O'Neill, R. Bindlish, M. H. Cosh, T. Caldwell, J. P. Walker, A. Berg, H. McNairn, M. Thibeault, J. Martinez-Fernandez, K. H. Jensen, J. Asanuma, M. S. Seyfried, D. D. Bosch, P. J. Starks, C. H. Collins, J. H. Prueger, Z. Su, E. Lopez-Baeza, and S. H. Yueh (2018), An assessment of the differences between spatial resolution and grid size for the SMAP enhanced soil moisture product over homogeneous sites, Remote Sensing of Environment, 207, 65-70, doi:10.1016/j.rse.2018.02.006.
Chan, S. K., R. Bindlish, P. O'Neill, T. Jackson, E. Njoku, S. Dunbar, J. Chaubell, J. Piepmeier, S. Yueh, D. Entekhabi, A. Colliander, F. Chen, M. H. Cosh, T. Caldwell, J. Walker, A. Berg, H. McNairn, M. Thibeault, J. Martinez-Fernandez, F. Uldall, M. Seyfried, D. Bosch, P. Starks, C. H. Collins, J. Prueger, R. van der Velde, J. Asanuma, M. Palecki, E. E. Small, M. Zreda, J. Calvet, W. T. Crow, and Y. Kerr (2018), Development and assessment of the SMAP enhanced passive soil moisture product, Remote Sensing of Environment, 204, 931-941, doi: 10.1016/j.rse.2017.08.025.
Caldwell, T. G., T. Bongiovanni, M. H. Cosh, C. Halley, and M. H. Young (2018), Field and laboratory evaluation of the CS655 soil water content sensor, Vadose Zone Journal, 17, 170214, doi:10.2136/vzj2017.12.0214.
Bindlish, R., M. H. Cosh, T. J. Jackson, T. Koike, H. Fujii, S. K. Chan, J. Asanuma, A. Berg, D. D. Bosch, T. Caldwell, C. H. Collins, H. McNairn, J. Martinez-Fernandez, J. Prueger, T. Rowlandson, M. Seyfried, P. Starks, M. Thibeault, R. Van der Velde, J. P. Walker, and E. J. Coopersmith (2018), GCOM-W AMSR2 soil moisture product validation using core validation sites, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 11, 209-219, doi:10.1109/Jstars.2017.2754293.
Abolt, C., T. Caldwell, B. Wolaver, and H. Pai (2018), Unmanned aerial vehicle-based monitoring of groundwater inputs to surface waters using an economical thermal infrared camera, Optical Engineering, 57, 9, 053113, doi:10.1117/1.Oe.57.5.053113.
Young, M. H., J. H. Andrews, T. G. Caldwell, and K. Saylam (2017), Airborne LiDAR and Aerial Imagery to Assess Potential Burrow Locations for the Desert Tortoise (Gopherus agassizii), Remote Sensing, 9, ARTN 458, doi:10.3390/rs9050458.
Reichle, R. H., G. J. M. De Lannoy, Q. Liu, J. V. Ardizzone, A. Colliander, A. Conaty, W. Crow, T. J. Jackson, L. A. Jones, J. S. Kimball, R. D. Koster, S. P. Mahanama, E. B. Smith, A. Berg, S. Bircher, D. Bosch, T. G. Caldwell, M. Cosh, A. Gonzalez-Zamora, C. D. H. Collins, K. H. Jensen, S. Livingston, E. Lopez-Baeza, J. Martinez-Fernandez, H. McNairn, M. Moghaddam, A. Pacheco, T. Pellarin, J. Prueger, T. Rowlandson, M. Seyfried, P. Starks, Z. B. Su, M. Thibeault, R. van der Velde, J. Walker, X. L. Wu, and Y. J. Zeng (2017), Assessment of the SMAP Level-4 Surface and Root-Zone Soil Moisture Product Using In Situ Measurements, Journal of Hydrometeorology, 18, 2621-2645, 10.1175/Jhm-D-17-0063.1.
Ouellette, J. D., J. T. Johnson, A. Balenzano, F. Mattia, G. Satalino, S.-B. Kim, R. S. Dunbar, A. Colliander, M. H. Cosh, T. G. Caldwell, J. P. Walker, and A. A. Berg (2017), A time-series approach to estimating soil moisture from vegetated surfaces using L-band radar backscatter, IEEE Transactions on Geoscience and Remote Sensing, 55, 3186-3193, doi:10.1109/TGRS.2017.2663768.
Kolassa, J., R. Reichle, Q. Liu, M. Cosh, D. Bosch, T. Caldwell, A. Colliander, C. Holifield Collins, T. Jackson, S. Livingston, M. Moghaddam, and P. Starks (2017), Data assimilation to extract soil moisture information from SMAP observations, Remote Sensing, 1179, doi:10.3390/rs9111179, 1179, doi:10.3390/rs9111179.
Kim, S. B., J. J. van Zyl, J. T. Johnson, M. Moghaddam, L. Tsang, A. Colliander, R. S. Dunbar, T. J. Jackson, S. Jaruwatanadilok, R. West, A. Berg, T. Caldwell, M. H. Cosh, D. C. Goodrich, S. Livingston, E. Lopez-Baeza, T. Rowlandson, M. Thibeault, J. P. Walker, D. Entekhabi, E. G. Njoku, P. E. O'Neill, and S. H. Yueh (2017), Surface soil moisture retrieval using the L-band synthetic aperture radar onboard the Soil Moisture Active-Passive satellite and evaluation at core validation sites, IEEE Transactions on Geoscience and Remote Sensing, 55, 1897-1914, doi:10.1109/Tgrs.2016.2631126.
Degre, A., M. J. van der Ploeg, T. Caldwell, and H. P. A. Gooren (2017), Comparison of Soil Water Potential Sensors: A Drying Experiment, Vadose Zone Journal, 16, 10.2136/vzj2016.08.0067.
Colliander, A., T. J. Jackson, R. Bindlish, S. Chan, N. Das, S. B. Kim, M. H. Cosh, R. S. Dunbar, L. Dang, L. Pashaian, J. Asanuma, K. Aida, A. Berg, T. Rowlandson, D. Bosch, T. Caldwell, K. Caylor, D. Goodrich, H. al Jassar, E. Lopez-Baeza, J. Martinez-Fernandez, A. Gonzalez-Zamora, S. Livingston, H. McNairn, A. Pacheco, M. Moghaddam, C. Montzka, C. Notarnicola, G. Niedrist, T. Pellarin, J. Prueger, J. Pulliainen, K. Rautiainen, J. Ramos, M. Seyfried, P. Starks, Z. Su, Y. Zeng, R. van der Velde, M. Thibeault, W. Dorigo, M. Vreugdenhil, J. P. Walker, X. Wu, A. Monerris, P. E. O'Neill, D. Entekhabi, E. G. Njoku, and S. Yueh (2017), Validation of SMAP surface soil moisture products with core validation sites, Remote Sensing of Environment, 191, 215-231, doi:10.1016/j.rse.2017.01.021.
Clewley, D., J. B. Whitcomb, R. Akbar, A. R. Silva, A. Berg, J. R. Adams, T. Caldwell, D. Entekhabi, and M. Moghaddam (2017), A method for upscaling in situ soil moisture measurements to satellite footprint scale using random forests, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 10, 2663-2673.
Abolt, C. J., M. H. Young, and T. G. Caldwell (2017), Numerical Modelling of Ice-Wedge Polygon Geomorphic Transition, Permafrost and Periglacial Processes, 28, 347-355.
Shellito, P. J., E. E. Small, A. Colliander, R. Bindlish, M. H. Cosh, A. A. Berg, D. D. Bosch, T. G. Caldwell, D. C. Goodrich, H. McNairn, J. H. Prueger, P. J. Starks, R. van der Velde, and J. P. Walker (2016), SMAP soil moisture drying more rapid than observed in situ following rainfall events, Geophysical Research Letters, 43, 8068-8075, 10.1002/2016gl069946.
Chan, S. K., R. Bindlish, P. E. O'Neill, E. Njoku, T. Jackson, A. Colliander, F. Chen, M. Burgin, S. Dunbar, J. Piepmeier, S. Yueh, D. Entekhabi, M. H. Cosh, T. Caldwell, J. Walker, X. L. Wu, A. Berg, T. Rowlandson, A. Pacheco, H. McNairn, M. Thibeault, J. Martinez-Fernandez, A. Gonzalez-Zamora, M. Seyfried, D. Bosch, P. Starks, D. Goodrich, J. Prueger, M. Palecki, E. E. Small, M. Zreda, J. C. Calvet, W. T. Crow, and Y. Kerr (2016), Assessment of the SMAP passive soil moisture product, IEEE Transactions on Geoscience and Remote Sensing, 54, 4994-5007.
Zhu, J. T., D. M. Sun, M. H. Young, T. G. Caldwell, and F. Pan (2015), Shrub spatial organization and partitioning of evaporation and transpiration in arid environments, Ecohydrology, 8, 1218-1228.
Rau, B. M., J. C. Chambers, D. A. Pyke, B. A. Roundy, E. W. Schupp, P. Doescher, and T. G. Caldwell (2014), Soil Resources Influence Vegetation and Response to Fire and Fire-Surrogate Treatments in Sagebrush-Steppe Ecosystems, Rangeland Ecology & Management, 67, 506-521.
Caldwell, T. G., T. Wohling, M. H. Young, D. P. Boyle, and E. V. McDonald (2013), Characterizing Disturbed Desert Soils Using Multiobjective Parameter Optimization, Vadose Zone Journal, 12, 1-23.
Wilcox, B. P., L. Turnbull, M. H. Young, C. J. Williams, S. Ravi, M. S. Seyfried, D. R. Bowling, R. L. Scott, M. J. Germino, T. G. Caldwell, and J. Wainwright (2012), Invasion of shrublands by exotic grasses: ecohydrological consequences in cold versus warm deserts, Ecohydrology, 5, 160-173, 10.1002/eco.247.
Flerchinger, G. N., T. G. Caldwell, J. Cho, and S. P. Hardegree (2012), Simultaneous Heat and Water (Shaw) Model: Model Use, Calibration, and Validation, Transactions of the ASABE, 55, 1395-1411.
Caldwell, T. G., M. H. Young, E. V. McDonald, and J. T. Zhu (2012), Soil heterogeneity in Mojave Desert shrublands: Biotic and abiotic processes, Water Resources Research, 48, W09551, doi: 10.1029/2012wr011963.
Rau, B. M., D. W. Johnson, R. R. Blank, R. J. Tausch, B. A. Roundy, R. F. Miller, T. G. Caldwell, and A. Lucchesi (2011), Woodland expansion’s influence on belowground carbon and nitrogen in the Great Basin U.S, Journal of Arid Environments, 75, 827-835.
Rau, B. M., D. W. Johnson, R. R. Blank, A. Lucchesi, T. G. Caldwell, and E. W. Schupp (2011), Transition From Sagebrush Steppe to Annual Grass (Bromus tectorum): Influence on Belowground Carbon and Nitrogen, Rangeland Ecology & Management, 64, 139-147.
Bacon, S. N., E. V. McDonald, T. G. Caldwell, and G. K. Dalldorf (2010), Timing and distribution of alluvial fan sedimentation in response to strengthening of late Holocene ENSO variability in the Sonoran Desert, southwestern Arizona, USA, Quaternary Research, 73, 425-438.
Young, M. H., T. G. Caldwell, D. G. Meadows, and L. F. Fenstermaker (2009), Variability of soil physical and hydraulic properties at the Mojave Global Change Facility, Nevada: Implications for water budget and evapotranspiration, Journal of Arid Environments, 73, 733-744.
Caldwell, T. G., E. V. McDonald, and M. H. Young (2009), The seedbed microclimate and active revegetation of disturbed lands in the Mojave Desert, Journal of Arid Environments, 73, 563-573.
Caldwell, T. G., D. W. Johnson, W. W. Miller, R. G. Qualls, and R. R. Blank (2009), Prescription Fire and Anion Retention in Tahoe Forest Soils, Soil Science, 174, 594-600.
McDonald, E. V., and T. G. Caldwell (2008), Geochemical characteristics of Iraqi dust and soil samples and related impacts to weapon malfunctions, in Military Geography and Geology: History and Technology, edited by C. P. Nathanail, R. J. Abrahart and R. P. Bradshaw, pp. 258-265, Land Quality Press, Nottingham.
Caldwell, T. G., M. H. Young, J. T. Zhu, and E. V. McDonald (2008), Spatial structure of hydraulic properties from canopy to interspace in the Mojave Desert, Geophysical Research Letters, 35, L19406, doi:10.1029/2008gl035095.
Caldwell, T. G., E. V. McDonald, S. N. Bacon, and G. Stullenbarger (2008), The performance and sustainability of vehicle dust courses for military testing, Journal Of Terramechanics, 45, 213-221.
Bacon, S. N., E. V. McDonald, S. E. Baker, T. G. Caldwell, and G. Stullenbarger (2008), Desert terrain characterization of landforms and surface materials within vehicle test courses at US Army Yuma Proving Ground, USA, Journal Of Terramechanics, 45, 167-183.
Shafer, D. S., M. H. Young, S. F. Zitzer, T. G. Caldwell, and E. V. McDonald (2007), Impacts of interrelated biotic and abiotic processes during the past 125 000 years of landscape evolution in the Northern Mojave Desert, Nevada, USA, Journal of Arid Environments, 69, 633-657.
Caldwell, T. G., E. V. McDonald, and M. H. Young (2006), Soil disturbance and hydrologic response at the National Training Center, Ft. Irwin, California, Journal of Arid Environments, 67, 456-472.
Young, M. H., E. V. McDonald, T. G. Caldwell, S. G. Benner, and D. G. Meadows (2005), Hydraulic properties of a desert soil chronosequence in the Mojave desert, USA, Vadose Zone Journal, 3, 956-963.
Johnson, D. W., J. F. Murphy, R. B. Susfalk, T. G. Caldwell, W. W. Miller, R. F. Walker, and R. F. Powers (2005), The effects of wildfire, salvage logging, and post-fire N-fixation on the nutrient budgets of a Sierran forest, Forest Ecology And Management, 220, 155-165.
Sisson, J. B., G. W. Gee, J. M. Hubbell, W. L. Bratton, J. C. Ritter, A. L. Ward, and T. G. Caldwell (2002), Advances in Tensiometry for Long-Term Monitoring of Soil Water Pressures, Vadose Zone Journal, 1, 310-315.
Gee, G. W., A. L. Ward, T. G. Caldwell, and J. C. Ritter (2002), A vadose zone water fluxmeter with divergence control, Water Resources Research, 38, ARTN 1141, doi:10.1029/2001wr000816.
Caldwell, T. G., D. W. Johnson, W. W. Miller, and R. G. Qualls (2002), Forest floor carbon and nitrogen losses due to prescription fire, Soil Science Society of America Journal, 66, 262-267.
Johnson, D. W., R. B. Susfalk, R. A. Dahlgren, T. G. Caldwell, and W. W. Miller (2001), Nutrient fluxes in a snow-dominated, semi-arid forest: Spatial and temporal patterns, Biogeochemistry, 55, 219-245.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 13
Soil resources influence vegetation and response to fire and fire-surrogate treatments in sagebrush-steppe ecosystems Soil resources influence vegetation and response to fire and fire-surrogate treatments in sagebrush-steppe ecosystems
Current paradigm suggests that spatial and temporal competition for resources limit an exotic invader, cheatgrass (Bromus tectorum L.), which once established, alters fire regimes and can result in annual grass dominance in sagebrush steppe. Prescribed fire and fire surrogate treatments (mowing, tebuthiuron, and imazapic) are used to reduce woody fuels and increase resistance to exotic...
Authors
Benjamin M. Rau, Jeanne C. Chambers, David A. Pyke, Bruce A. Roundy, Eugene W. Schupp, Paul Doescher, Todd G. Caldwell
Non-USGS Publications**
Caldwell, T. G., B. D. Wolaver, T. Bongiovanni, J. P. Pierre, S. Robertson, C. Abolt, and B. R. Scanlon (2020), Spring discharge and thermal regime of a groundwater dependent ecosystem in an arid karst environment, Journal of Hydrology, 10.1016/j.jhydrol.2020.124947.
Colliander, A., T. J. Jackson, A. Berg, D. D. Bosch, T. Caldwell, S. Chan, M. H. Cosh, C. H. Collins, J. Martínez-Fernández, H. McNairn, J. H. Prueger, P. J. Starks, J. P. Walker, and S. H. Yueh (2020), Effect of Rainfall Events on SMAP Radiometer-Based Soil Moisture Accuracy Using Core Validation Sites, Journal of Hydrometeorology, 21, 255-264, 10.1175/jhm-d-19-0122.1.
Chaubell, M. J., J. Asanuma, A. A. Berg, D. D. Bosch, T. Caldwell, M. H. Cosh, C. H. Collins, J. Martinez-Fernandez, M. Seyfried, P. J. Starks, Z. Su, S. H. Yueh, M. Thibeault, J. Walker, R. S. Dunbar, A. Colliander, F. Chen, S. K. Chan, D. Entekhabi, R. Bindlish, and P. E. O'Neill (2020), Improved SMAP Dual-Channel Algorithm for the Retrieval of Soil Moisture, IEEE Transactions on Geoscience and Remote Sensing, 1-12, doi: 10.1109/tgrs.2019.2959239.
Gholoubi, A., H. Emami, and T. Caldwell (2019), Deforestation effects on soil aggregate stability quantified by the high energy moisture characteristic method, Geoderma, 355, 113919, 10.1016/j.geoderma.2019.113919.
Mayes, K. B., G. R. Wilde, M. E. McGarrity, B. Wolaver, and T. G. Caldwell (2019), Watershed-Scale Conservation of Native Fishes in the Brazos River Basin, Texas, in Multispecies and Watershed Approaches to Freshwater Fish Conservation, edited by D. C. Dauwalter, T. Birdson and G. P. Garret, pp. 315–343, American Fisheries Society Symposia 91, Bethesda, MD.
Robertson, S., B. Wolaver, T. G. Caldwell, T. Birdson, R. Smith, T. Hardy, J. Lewey, and J. Joplin (2019), A multidisciplinary approach to developing the science and public support needed to maintain instream flows in the Devils River Basin, Texas, in Multispecies and Watershed Approaches to Freshwater Fish Conservation, edited by D. C. Dauwalter, T. Birdson and G. P. Garret, pp. 293–314, American Fisheries Society Symposia 91, Bethesda, MD.
Das, N. N., D. Entekhabi, R. S. Dunbar, M. J. Chaubell, A. Colliander, S. Yueh, T. Jagdhuber, F. Chen, W. Crow, P. E. O'Neill, J. P. Walker, A. Berg, D. D. Bosch, T. Caldwell, M. H. Cosh, C. H. Collins, E. Lopez-Baeza, and M. Thibeault (2019), The SMAP and Copernicus Sentinel 1A/B microwave active-passive high resolution surface soil moisture product, Remote Sensing of Environment, 233, 111380, 10.1016/j.rse.2019.111380.
Caldwell, T. G., T. Bongiovanni, M. H. Cosh, T. J. Jackson, A. Colliander, C. J. Abolt, R. Casteel, T. Larson, B. R. Scanlon, and M. H. Young (2019), The Texas Soil Observation Network: A comprehensive soil moisture dataset for remote sensing and land surface model validation, Vadose Zone Journal, 18:100034, doi:10.2136/vzj2019.04.0034.
Sun, A. Y., Y. L. Xia, T. G. Caldwell, and Z. C. Hao (2018), Patterns of precipitation and soil moisture extremes in Texas, US: A complex network analysis, Advances in Water Resources, 112, 203-213, 10.1016/j.advwatres.2017.12.019.
Kolassa, J., R. H. Reichle, Q. Liu, S. H. Alemohammad, P. Gentine, K. Aida, J. Asanuma, S. Bircher, T. Caldwell, A. Colliander, M. Cosh, C. Holifield Collins, T. J. Jackson, J. Martínez-Fernández, H. McNairn, A. Pacheco, M. Thibeault, and J. P. Walker (2018), Estimating surface soil moisture from SMAP observations using a Neural Network technique, Remote Sensing of Environment, 204, 43-59, doi: 10.1016/j.rse.2017.10.045.
Das, N. N., D. Entekhabi, R. S. Dunbar, A. Colliander, F. Chen, W. Crow, T. J. Jackson, A. Berg, D. D. Bosch, T. Caldwell, M. H. Cosh, C. H. Collins, E. Lopez-Baeza, M. Moghaddam, T. Rowlandson, P. J. Starks, M. Thibeault, J. P. Walker, X. L. Wu, P. E. O'Neill, S. Yueh, and E. G. Njoku (2018), The SMAP mission combined active-passive soil moisture product at 9 km and 3 km spatial resolutions, Remote Sensing of Environment, 211, 204-217, doi:10.1016/j.rse.2018.04.011.
Colliander, A., T. J. Jackson, S. K. Chan, P. O'Neill, R. Bindlish, M. H. Cosh, T. Caldwell, J. P. Walker, A. Berg, H. McNairn, M. Thibeault, J. Martinez-Fernandez, K. H. Jensen, J. Asanuma, M. S. Seyfried, D. D. Bosch, P. J. Starks, C. H. Collins, J. H. Prueger, Z. Su, E. Lopez-Baeza, and S. H. Yueh (2018), An assessment of the differences between spatial resolution and grid size for the SMAP enhanced soil moisture product over homogeneous sites, Remote Sensing of Environment, 207, 65-70, doi:10.1016/j.rse.2018.02.006.
Chan, S. K., R. Bindlish, P. O'Neill, T. Jackson, E. Njoku, S. Dunbar, J. Chaubell, J. Piepmeier, S. Yueh, D. Entekhabi, A. Colliander, F. Chen, M. H. Cosh, T. Caldwell, J. Walker, A. Berg, H. McNairn, M. Thibeault, J. Martinez-Fernandez, F. Uldall, M. Seyfried, D. Bosch, P. Starks, C. H. Collins, J. Prueger, R. van der Velde, J. Asanuma, M. Palecki, E. E. Small, M. Zreda, J. Calvet, W. T. Crow, and Y. Kerr (2018), Development and assessment of the SMAP enhanced passive soil moisture product, Remote Sensing of Environment, 204, 931-941, doi: 10.1016/j.rse.2017.08.025.
Caldwell, T. G., T. Bongiovanni, M. H. Cosh, C. Halley, and M. H. Young (2018), Field and laboratory evaluation of the CS655 soil water content sensor, Vadose Zone Journal, 17, 170214, doi:10.2136/vzj2017.12.0214.
Bindlish, R., M. H. Cosh, T. J. Jackson, T. Koike, H. Fujii, S. K. Chan, J. Asanuma, A. Berg, D. D. Bosch, T. Caldwell, C. H. Collins, H. McNairn, J. Martinez-Fernandez, J. Prueger, T. Rowlandson, M. Seyfried, P. Starks, M. Thibeault, R. Van der Velde, J. P. Walker, and E. J. Coopersmith (2018), GCOM-W AMSR2 soil moisture product validation using core validation sites, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 11, 209-219, doi:10.1109/Jstars.2017.2754293.
Abolt, C., T. Caldwell, B. Wolaver, and H. Pai (2018), Unmanned aerial vehicle-based monitoring of groundwater inputs to surface waters using an economical thermal infrared camera, Optical Engineering, 57, 9, 053113, doi:10.1117/1.Oe.57.5.053113.
Young, M. H., J. H. Andrews, T. G. Caldwell, and K. Saylam (2017), Airborne LiDAR and Aerial Imagery to Assess Potential Burrow Locations for the Desert Tortoise (Gopherus agassizii), Remote Sensing, 9, ARTN 458, doi:10.3390/rs9050458.
Reichle, R. H., G. J. M. De Lannoy, Q. Liu, J. V. Ardizzone, A. Colliander, A. Conaty, W. Crow, T. J. Jackson, L. A. Jones, J. S. Kimball, R. D. Koster, S. P. Mahanama, E. B. Smith, A. Berg, S. Bircher, D. Bosch, T. G. Caldwell, M. Cosh, A. Gonzalez-Zamora, C. D. H. Collins, K. H. Jensen, S. Livingston, E. Lopez-Baeza, J. Martinez-Fernandez, H. McNairn, M. Moghaddam, A. Pacheco, T. Pellarin, J. Prueger, T. Rowlandson, M. Seyfried, P. Starks, Z. B. Su, M. Thibeault, R. van der Velde, J. Walker, X. L. Wu, and Y. J. Zeng (2017), Assessment of the SMAP Level-4 Surface and Root-Zone Soil Moisture Product Using In Situ Measurements, Journal of Hydrometeorology, 18, 2621-2645, 10.1175/Jhm-D-17-0063.1.
Ouellette, J. D., J. T. Johnson, A. Balenzano, F. Mattia, G. Satalino, S.-B. Kim, R. S. Dunbar, A. Colliander, M. H. Cosh, T. G. Caldwell, J. P. Walker, and A. A. Berg (2017), A time-series approach to estimating soil moisture from vegetated surfaces using L-band radar backscatter, IEEE Transactions on Geoscience and Remote Sensing, 55, 3186-3193, doi:10.1109/TGRS.2017.2663768.
Kolassa, J., R. Reichle, Q. Liu, M. Cosh, D. Bosch, T. Caldwell, A. Colliander, C. Holifield Collins, T. Jackson, S. Livingston, M. Moghaddam, and P. Starks (2017), Data assimilation to extract soil moisture information from SMAP observations, Remote Sensing, 1179, doi:10.3390/rs9111179, 1179, doi:10.3390/rs9111179.
Kim, S. B., J. J. van Zyl, J. T. Johnson, M. Moghaddam, L. Tsang, A. Colliander, R. S. Dunbar, T. J. Jackson, S. Jaruwatanadilok, R. West, A. Berg, T. Caldwell, M. H. Cosh, D. C. Goodrich, S. Livingston, E. Lopez-Baeza, T. Rowlandson, M. Thibeault, J. P. Walker, D. Entekhabi, E. G. Njoku, P. E. O'Neill, and S. H. Yueh (2017), Surface soil moisture retrieval using the L-band synthetic aperture radar onboard the Soil Moisture Active-Passive satellite and evaluation at core validation sites, IEEE Transactions on Geoscience and Remote Sensing, 55, 1897-1914, doi:10.1109/Tgrs.2016.2631126.
Degre, A., M. J. van der Ploeg, T. Caldwell, and H. P. A. Gooren (2017), Comparison of Soil Water Potential Sensors: A Drying Experiment, Vadose Zone Journal, 16, 10.2136/vzj2016.08.0067.
Colliander, A., T. J. Jackson, R. Bindlish, S. Chan, N. Das, S. B. Kim, M. H. Cosh, R. S. Dunbar, L. Dang, L. Pashaian, J. Asanuma, K. Aida, A. Berg, T. Rowlandson, D. Bosch, T. Caldwell, K. Caylor, D. Goodrich, H. al Jassar, E. Lopez-Baeza, J. Martinez-Fernandez, A. Gonzalez-Zamora, S. Livingston, H. McNairn, A. Pacheco, M. Moghaddam, C. Montzka, C. Notarnicola, G. Niedrist, T. Pellarin, J. Prueger, J. Pulliainen, K. Rautiainen, J. Ramos, M. Seyfried, P. Starks, Z. Su, Y. Zeng, R. van der Velde, M. Thibeault, W. Dorigo, M. Vreugdenhil, J. P. Walker, X. Wu, A. Monerris, P. E. O'Neill, D. Entekhabi, E. G. Njoku, and S. Yueh (2017), Validation of SMAP surface soil moisture products with core validation sites, Remote Sensing of Environment, 191, 215-231, doi:10.1016/j.rse.2017.01.021.
Clewley, D., J. B. Whitcomb, R. Akbar, A. R. Silva, A. Berg, J. R. Adams, T. Caldwell, D. Entekhabi, and M. Moghaddam (2017), A method for upscaling in situ soil moisture measurements to satellite footprint scale using random forests, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 10, 2663-2673.
Abolt, C. J., M. H. Young, and T. G. Caldwell (2017), Numerical Modelling of Ice-Wedge Polygon Geomorphic Transition, Permafrost and Periglacial Processes, 28, 347-355.
Shellito, P. J., E. E. Small, A. Colliander, R. Bindlish, M. H. Cosh, A. A. Berg, D. D. Bosch, T. G. Caldwell, D. C. Goodrich, H. McNairn, J. H. Prueger, P. J. Starks, R. van der Velde, and J. P. Walker (2016), SMAP soil moisture drying more rapid than observed in situ following rainfall events, Geophysical Research Letters, 43, 8068-8075, 10.1002/2016gl069946.
Chan, S. K., R. Bindlish, P. E. O'Neill, E. Njoku, T. Jackson, A. Colliander, F. Chen, M. Burgin, S. Dunbar, J. Piepmeier, S. Yueh, D. Entekhabi, M. H. Cosh, T. Caldwell, J. Walker, X. L. Wu, A. Berg, T. Rowlandson, A. Pacheco, H. McNairn, M. Thibeault, J. Martinez-Fernandez, A. Gonzalez-Zamora, M. Seyfried, D. Bosch, P. Starks, D. Goodrich, J. Prueger, M. Palecki, E. E. Small, M. Zreda, J. C. Calvet, W. T. Crow, and Y. Kerr (2016), Assessment of the SMAP passive soil moisture product, IEEE Transactions on Geoscience and Remote Sensing, 54, 4994-5007.
Zhu, J. T., D. M. Sun, M. H. Young, T. G. Caldwell, and F. Pan (2015), Shrub spatial organization and partitioning of evaporation and transpiration in arid environments, Ecohydrology, 8, 1218-1228.
Rau, B. M., J. C. Chambers, D. A. Pyke, B. A. Roundy, E. W. Schupp, P. Doescher, and T. G. Caldwell (2014), Soil Resources Influence Vegetation and Response to Fire and Fire-Surrogate Treatments in Sagebrush-Steppe Ecosystems, Rangeland Ecology & Management, 67, 506-521.
Caldwell, T. G., T. Wohling, M. H. Young, D. P. Boyle, and E. V. McDonald (2013), Characterizing Disturbed Desert Soils Using Multiobjective Parameter Optimization, Vadose Zone Journal, 12, 1-23.
Wilcox, B. P., L. Turnbull, M. H. Young, C. J. Williams, S. Ravi, M. S. Seyfried, D. R. Bowling, R. L. Scott, M. J. Germino, T. G. Caldwell, and J. Wainwright (2012), Invasion of shrublands by exotic grasses: ecohydrological consequences in cold versus warm deserts, Ecohydrology, 5, 160-173, 10.1002/eco.247.
Flerchinger, G. N., T. G. Caldwell, J. Cho, and S. P. Hardegree (2012), Simultaneous Heat and Water (Shaw) Model: Model Use, Calibration, and Validation, Transactions of the ASABE, 55, 1395-1411.
Caldwell, T. G., M. H. Young, E. V. McDonald, and J. T. Zhu (2012), Soil heterogeneity in Mojave Desert shrublands: Biotic and abiotic processes, Water Resources Research, 48, W09551, doi: 10.1029/2012wr011963.
Rau, B. M., D. W. Johnson, R. R. Blank, R. J. Tausch, B. A. Roundy, R. F. Miller, T. G. Caldwell, and A. Lucchesi (2011), Woodland expansion’s influence on belowground carbon and nitrogen in the Great Basin U.S, Journal of Arid Environments, 75, 827-835.
Rau, B. M., D. W. Johnson, R. R. Blank, A. Lucchesi, T. G. Caldwell, and E. W. Schupp (2011), Transition From Sagebrush Steppe to Annual Grass (Bromus tectorum): Influence on Belowground Carbon and Nitrogen, Rangeland Ecology & Management, 64, 139-147.
Bacon, S. N., E. V. McDonald, T. G. Caldwell, and G. K. Dalldorf (2010), Timing and distribution of alluvial fan sedimentation in response to strengthening of late Holocene ENSO variability in the Sonoran Desert, southwestern Arizona, USA, Quaternary Research, 73, 425-438.
Young, M. H., T. G. Caldwell, D. G. Meadows, and L. F. Fenstermaker (2009), Variability of soil physical and hydraulic properties at the Mojave Global Change Facility, Nevada: Implications for water budget and evapotranspiration, Journal of Arid Environments, 73, 733-744.
Caldwell, T. G., E. V. McDonald, and M. H. Young (2009), The seedbed microclimate and active revegetation of disturbed lands in the Mojave Desert, Journal of Arid Environments, 73, 563-573.
Caldwell, T. G., D. W. Johnson, W. W. Miller, R. G. Qualls, and R. R. Blank (2009), Prescription Fire and Anion Retention in Tahoe Forest Soils, Soil Science, 174, 594-600.
McDonald, E. V., and T. G. Caldwell (2008), Geochemical characteristics of Iraqi dust and soil samples and related impacts to weapon malfunctions, in Military Geography and Geology: History and Technology, edited by C. P. Nathanail, R. J. Abrahart and R. P. Bradshaw, pp. 258-265, Land Quality Press, Nottingham.
Caldwell, T. G., M. H. Young, J. T. Zhu, and E. V. McDonald (2008), Spatial structure of hydraulic properties from canopy to interspace in the Mojave Desert, Geophysical Research Letters, 35, L19406, doi:10.1029/2008gl035095.
Caldwell, T. G., E. V. McDonald, S. N. Bacon, and G. Stullenbarger (2008), The performance and sustainability of vehicle dust courses for military testing, Journal Of Terramechanics, 45, 213-221.
Bacon, S. N., E. V. McDonald, S. E. Baker, T. G. Caldwell, and G. Stullenbarger (2008), Desert terrain characterization of landforms and surface materials within vehicle test courses at US Army Yuma Proving Ground, USA, Journal Of Terramechanics, 45, 167-183.
Shafer, D. S., M. H. Young, S. F. Zitzer, T. G. Caldwell, and E. V. McDonald (2007), Impacts of interrelated biotic and abiotic processes during the past 125 000 years of landscape evolution in the Northern Mojave Desert, Nevada, USA, Journal of Arid Environments, 69, 633-657.
Caldwell, T. G., E. V. McDonald, and M. H. Young (2006), Soil disturbance and hydrologic response at the National Training Center, Ft. Irwin, California, Journal of Arid Environments, 67, 456-472.
Young, M. H., E. V. McDonald, T. G. Caldwell, S. G. Benner, and D. G. Meadows (2005), Hydraulic properties of a desert soil chronosequence in the Mojave desert, USA, Vadose Zone Journal, 3, 956-963.
Johnson, D. W., J. F. Murphy, R. B. Susfalk, T. G. Caldwell, W. W. Miller, R. F. Walker, and R. F. Powers (2005), The effects of wildfire, salvage logging, and post-fire N-fixation on the nutrient budgets of a Sierran forest, Forest Ecology And Management, 220, 155-165.
Sisson, J. B., G. W. Gee, J. M. Hubbell, W. L. Bratton, J. C. Ritter, A. L. Ward, and T. G. Caldwell (2002), Advances in Tensiometry for Long-Term Monitoring of Soil Water Pressures, Vadose Zone Journal, 1, 310-315.
Gee, G. W., A. L. Ward, T. G. Caldwell, and J. C. Ritter (2002), A vadose zone water fluxmeter with divergence control, Water Resources Research, 38, ARTN 1141, doi:10.1029/2001wr000816.
Caldwell, T. G., D. W. Johnson, W. W. Miller, and R. G. Qualls (2002), Forest floor carbon and nitrogen losses due to prescription fire, Soil Science Society of America Journal, 66, 262-267.
Johnson, D. W., R. B. Susfalk, R. A. Dahlgren, T. G. Caldwell, and W. W. Miller (2001), Nutrient fluxes in a snow-dominated, semi-arid forest: Spatial and temporal patterns, Biogeochemistry, 55, 219-245.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.