The Numerical Terradynamic Simulation Group (NTSG) is a research center in the University of Montana's W.A. Franke College of Forestry & Conservation pioneering new approaches for landscape ecological and hydrological studies. A major focus of our research is to understand how vegetation responds to climate variability and influences the water, carbon and energy cycles. NTSG conducts research over a broad range of spatial scales, emphasizing emerging technologies in satellite remote sensing, computational modeling and biophysical theory. We are a leader in the development and application of satellite remote sensing for global environmental assessment and monitoring. NTSG is a NASA Earth Science Information Partner (ESIP), developer and repository for a variety of global land data products from satellite Earth missions, including MODIS (MOD16/17) vegetation productivity and evapotranspiration, AMSR land parameters, and SMAP (L4C) carbon flux products.

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Submissions from 2017

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Retrieving landscape freeze/thaw state fromSoil Moisture Active Passive (SMAP) radar and radiometer measurements, C. Derksen, Xiaolan Xu, R. Scott Dunbar, Andreas Colliander, Youngwook Kim, John S. Kimball, T. Andrew Black, E. Euskirchen, Alexandre Langlois, Michael M. Loranty, Philip Marsh, Kimmo Rautiainen, Alexandre Roy, Alain Royer, and Jilmarie Stephens

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Satellite microwave assessment of Northern Hemisphere lake ice phenology from 2002 to 2015, Jinyang Du, John S. Kimball, Claude Duguay, Youngwook Kim, and Jennifer D. Watts

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Satellite-observed changes in vegetation sensitivities to surface soil moisture and total water storage variations since the 2011 Texas drought, A. Geruo, I. Velicogna, John S. Kimball, Jinyang Du, Youngwook Kim, Andreas Colliander, and Eni G. Njoku

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An extended global Earth system data record on daily landscape freeze–thaw status determined from satellite passive microwave remote sensing, Youngwook Kim, John S. Kimball, Joseph M. Glassy, and Jinyang Du

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Global Analysis of Bioclimatic Controls on Ecosystem Productivity Using Satellite Observations of Solar-Induced Chlorophyll Fluorescence, Nima Madani, John S. Kimball, Lucas Alan Jones, Nicholas C. Parazoo, and Kaiyu Guan

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Decreasing net primary production due to drought and slight decreases in solar radiation in China from 2000 to 2012, J. Wang, J. Dong, Y. Yi, G. Lu, Jared Wesley Oyler, W. K. Smith, Maosheng Zhao, J. Liu, and Steven W. Running

Submissions from 2016

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Environmental controls on the increasing GPP of terrestrial vegetation across northern Eurasia, P. Dass, Michael A. Rawlins, John S. Kimball, and Y. Kim

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Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA, Scott J. Davidson, Maria J. Santos, Victoria L. Sloan, Jennifer D. Watts, Gareth K. Phoenix, Walter C. Oechel, and Donatella Zona

Implementation of satellite based fractional water cover indices in the pan-Arctic region using AMSR-E and MODIS, Jinyang Du, John S. Kimball, L. A. Jones, and Jennifer D. Watts

Passive Microwave Remote Sensing of Soil Moisture Based on Dynamic Vegetation Scattering Properties for AMSR-E, Jinyang Du, John S. Kimball, and Lucas A. Jones

Satellite detection of soil moisture related water stress impacts on ecosystem productivity using the MODIS-based photochemical reflectance index, Mingzhu He, John S. Kimball, Steven W. Running, Ashley P. Ballantyne, Kaiyu Guan, and Fred Huemmrich

The sensitivity of soil respiration to soil temperature, moisture, and carbon supply at the global scale, Andrew Hursh, Ashley P. Ballantyne, Leila Cooper, Marco Maneta, John S. Kimball, and Jennifer D. Watts

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Quantifying the effects of spring freeze-thaw transitions and snowpack dynamics on surface albedo change using satellite optical and microwave remote sensing, Youngwook Kim, John S. Kimball, Jinyang Du, Joseph M. Glassy, and Crystal L.B. Schaaf

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Remote Sensing Derived Fire Frequency, Soil Moisture and Ecosystem Productivity Explain Regional Movements in Emu over Australia, Nima Madani, John S. Kimball, Mona Nazeri, Lalit Kumar, and David L.R. Affleck

Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments, Hotaek Park, Youngwook Kim, and John S. Kimball

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Quantification of Warming Climate-Induced Changes in Terrestrial Arctic River Ice Thickness and Phenology, Hotaek Park, Yasuhiro Yoshikawa, Kazuhiro Oshima, Youngwook Kim, Thanh Ngo-Duc, John S. Kimball, and Daqing Yang

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Future Decreases in Freezing Days across North America, Michael A. Rawlins, Raymond S. Bradley, Henry F. Diaz, John S. Kimball, and David A. Robinson

Large divergence of satellite and Earth system model estimates of global terrestrial CO2 fertilization, W. Kolby Smith, Sasha C. Reed, Cory C. Cleveland, Ashley P. Ballantyne, William R. L. Anderegg, William R. Wieder, Yi Y. Liu, and Steven W. Running

Assessing the remotely sensed Drought Severity Index for agricultural drought monitoring and impact analysis in North China, Jie Zhang, Qiaozhen Mu, and Jianxi Huang

A review of remote sensing based actual evapotranspiration estimation: A review of remote sensing evapotranspiration, Ke Zhang, John S. Kimball, and Steven W. Running

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Hydrological Response of Alpine Wetlands to ClimateWarming in the Eastern Tibetan Plateau, Wenjiang Zhang, Yonghong Yi, Kechao Song, John S. Kimball, and Qifeng Lu

Submissions from 2015

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Impact of changes in GRACE derived terrestrial water storage on vegetation growth in Eurasia, G. A., I. Velicogna, John S. Kimball, and Y. Kim

Ecosystem services lost to oil and gas in North America, Brady W. Allred, W. Kolby Smith, Dirac Twidwell, Julia H. Haggerty, Steven W. Running, David E. Naugle, and Samuel D. Fuhlendorf

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Sunlight mediated seasonality in canopy structure and photosynthetic activity of Amazonian rainforests, Jian Bi, Yuri Knyazikhin, Sungho Choi, Taejin Park, Jonathan Barichivich, Philippe Ciais, Rong Fu, Sangram Ganguly, Forrest Hall, Thomas Hilker, Alfredo R. Huete, Matthew O. Jones, John S. Kimball, Alexei I. Lyapustin, Matti Mottus, Ramakrishna R. Nemani, Shilong Piao, Benjamin Poulter, Scott R. Saleska, Sassan S. Saatchi, Liang Xu, Liming Zhou, and Ranga B. Myneni

Classification of Alaska Spring Thaw Characteristics Using Satellite L-Band Radar Remote Sensing, Jinyang Du, John S. Kimball, Marzieh Azarderakhsh, R. Scott Dunbar, Mahta Moghaddam, and Kyle C. McDonald

Satellite Microwave Retrieval of Total Precipitable Water Vapor and Surface Air Temperature Over Land From AMSR2, Jinyang Du, John S. Kimball, and Lucas A. Jones

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Theoretical Modeling and Analysis of L- and P-band Radar Backscatter Sensitivity to Soil Active Layer Dielectric Variations, Jinyang Du, John S. Kimball, and Mahta Moghaddam

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Assimilation of Freeze–Thaw Observations into the NASA Catchment Land Surface Model, Leila Farhadi, Rolf H. Reichle, Gabrielle J. M. De Lannoy, and John S. Kimball

Photosynthetic seasonality of global tropical forests constrained by hydroclimate, Kaiyu Guan, Ming Pan, Haibin Li, Adam Wolf, Jin Wu, David Medvigy, Kelly K. Caylor, Justin Sheffield, Eric F. Wood, Yadvinder Malhi, Miaoling Liang, John S. Kimball, Scott R. Saleska, Joe Berry, Joanna Joiner, and Alexei I. Lyapustin

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Dynamics of MODIS evapotranspiration in South Africa, Nebo Jovanovic, Qiaozhen Mu, Richard D. H. Bugan, and Maosheng Zhao

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New satellite climate data records indicate strong coupling between recent frozen season changes and snow cover over high northern latitudes, Youngwook Kim, John S. Kimball, D. A. Robinson, and C. Derksen

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New F/T ESDR Summary Quad Chart: Integrated Satellite Data Records Reveal Strong Coupling Between Recent Pan-Arctic Frozen Season and Snow Cover Changes, Youngwook Kim, John S. Kimball, David A. Robinson, and C. Derksen

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Local cooling and warming effects of forests based on satellite observations, Yan Li, Maosheng Zhao, Safa Motesharrei, Qiaozhen Mu, Eugenia Kalnay, and Shuangcheng Li

Global satellite monitoring of climate-induced vegetation disturbances, Nate G. McDowell, Nicholas C. Coops, Pieter S. A. Beck, Jeffrey Q. Chambers, Chandana Gangodagamage, Jeffrey A. Hicke, Cho-ying Huang, Robert Kennedy, Dan J. Krofcheck, Marcy Litvak, Arjan J.H. Meddens, Jordan Muss, Robinson Negron-Juarez, Changhui Peng, Amanda M. Schwantes, Jennifer J. Swenson, Louis J. Vernon, A. Park Williams, Chonggang Xu, Maosheng Zhao, Steven W. Running, and Craig D. Allen

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Suitable Days for Plant Growth Disappear under Projected Climate Change: Potential Human and Biotic Vulnerability, Camilo Mora, Iain R. Caldwell, Jamie M. Caldwell, Micah R. Fisher, Brandon M. Genco, and Steven W. Running

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Artificial amplification of warming trends across the mountains of the western United States, Jared Wesley Oyler, Solomon Z. Dobrowski, Ashley P. Ballantyne, Anna E. Klene, and Steven W. Running

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Assessment of model estimates of land-atmosphere CO2 exchange across Northern Eurasia, Michael A. Rawlins, A. D. McGuire, John S. Kimball, P. Dass, D. Lawrence, E. Burke, X. Chen, C. Delire, C. Koven, A. MacDougall, S. Peng, A. Rinke, K. Saito, W. Zhang, R. Alkama, Theodore J. Bohn, Philippe Ciais, B. Decharme, I. Gouttevin, T. Hajima, D. Ji, G. Krinner, Dennis P. Lettenmaier, P. Miller, J. C. Moore, B. Smith, and T. Sueyoshi

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Comparing Evapotranspiration from Eddy Covariance Measurements, Water Budgets, Remote Sensing, and Land Surface Models over Canada, Shusen Wang, Ming Pan, Qiaozhen Mu, Xiaoying Shi, Jiafu Mao, Christian Brummer, Rachhpal S. Jassal, Praveena Krishnan, Junhua Li, and T. Andrew Black

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The role of snow cover affecting boreal-arctic soil freeze–thaw and carbon dynamics, Y. Yi, John S. Kimball, Michael A. Rawlins, Mahta Moghaddam, and E. S. Euskirchen

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Vegetation Greening and Climate Change Promote Multidecadal Rises of Global Land Evapotranspiration, Ke Zhang, John S. Kimball, Ramakrishna R. Nemani, Steven W. Running, Yang Hong, Jonathan J. Gourley, and Zhongbo Yu

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Climatic Controls on Spring Onset of the Tibetan Plateau Grasslands from 1982 to 2008, Wenjiang Zhang, Yonghong Yi, John S. Kimball, Youngwook Kim, and Kechao Song

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Cold season emissions dominate the Arctic tundra methane budget, Donatella Zona, Beniamino Gioli, Roisin Commane, Jakob Lindaas, Steve Wofsy, Charles E. Miller, Steven J. Dinardo, Sigrid Dengel, Colm Sweeney, Anna Karion, Rachel Y.-W. Chang, John M. Henderson, Patrick C. Murphy, Jordan P. Goodrich, Virginie Moreaux, Anna Liljedahl, Jennifer D. Watts, John S. Kimball, David A. Lipson, and Walt Oechel

Submissions from 2014

Comparison of satellite-based evapotranspiration models over terrestrial ecosystems in China, Yang Chen, Jiangzhou Xia, Shunlin Liang, Jinming Feng, Joshua B. Fisher, Xin Li, Xianglan Li, Shuguang Liu, Zhuguo Ma, Akira Miyata, Qiaozhen Mu, Liang Sun, Jianwei Tang, Kaicun Wang, Jun Wen, Yueju Xue, Guirui Yu, Tonggang Zha, Li Zhang, Qiang Zhang, Tianbao Zhao, Liang Zhao, and Wenping Yuan

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Inter-Calibration of Satellite Passive Microwave Land Observations from AMSR-E and AMSR2 Using Overlapping FY3B-MWRI Sensor Measurements, Jinyang Du, John S. Kimball, Jiancheng Shi, Lucas Alan Jones, Shengli Wu, Ruijing Sun, and Hu Yang

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Terrestrial hydrological controls on land surface phenology of African savannas and woodlands, Kaiyu Guan, Eric F. Wood, David Medvigy, John S. Kimball, Ming Pan, Kelly K. Caylor, Justin Sheffield, Xiangtao Xu, and Matthew O. Jones

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Exposure of U.S. National Parks to land use and climate change 1900-2100, Andrew J. Hansen, Cory Davis, Jessica Haas, David M. Theobald, John E. Gross, William B. Monahan, Tom Olliff, and Steven W. Running

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Retrievals of All-Weather Daily Air Temperature Using MODIS and AMSR-E Data, Keunchang Jang, Sinkyu Kang, John S. Kimball, and Suk Young Hong

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Asynchronous Amazon forest canopy phenology indicates adaptation to both water and light availability, Matthew O. Jones, John S. Kimball, and Ramakrishna R. Nemani

Comparing land surface phenology derived from satellite and GPS network microwave remote sensing, Matthew O. Jones, John S. Kimball, Eric E. Small, and Kristine M. Larson

Effects of spatial and temporal climatic variability on terrestrial carbon and water fluxes in the Pacific Northwest, USA, Sinkyu Kang, Steven W. Running, John S. Kimball, Daniel B. Fagre, Andrew Michaelis, David L. Peterson, Jessica E. Halofsky, and Sukyoung Hong