Year of Award
Dissertation - Campus Access Only
Doctor of Philosophy (PhD)
Department or School/College
Department of Ecosystem and Conservation Sciences
John S. Kimball
Steven W. Running, Anna Sala, Ashley Ballantyne, Marco Maneta
Agriculture, Evapotranspiration, Gross primary production, Landsat, Light use efficiency, MODIS
University of Montana
Accurate estimations of terrestrial carbon uptake (Gross Primary Production, GPP) and water loss (Evapotranspiration, ET) are crucial for understanding the response of ecosystems to climate change and to various natural and human-induced disturbances. Satellite remote sensing offers unique opportunities for regional to global GPP and ET assessments by providing spatially and temporally continuous and consistent observations of vegetation and ecosystem properties. However, the current GPP and ET estimates contain large uncertainties, resulting in limited understanding of terrestrial ecosystem responses to climate variability. Satellite-based GPP and ET models, such as the MOD17 algorithm, Terrestrial Carbon Flux model (TCF) and MOD16 ET algorithm, have shown capabilities for regional to global GPP and ET simulations. However, the predefined parameters and inappropriate coarse scale input data limit the model performance at fine scale. This research addresses the current uncertainties in remote sensing-based GPP and ET models by integrated use of overlapping satellite observations, ancillary geophysical data, and in situ measurements from flux tower sites. The results show improvements for regional GPP, crop yield and cropland ET assessments encompassing different vegetation types and climate variability against baseline results from the original GPP and ET global models. This research provides new understanding and effective tools for improving regional GPP and ET monitoring from global satellites. This research also improves understanding of the response of regional vegetation productivity and water use to climate variability, promoting more effective agricultural water management, policy decisions and food security.
He, Mingzhu, "RESPONSES OF TERRESTRIAL CARBON AND WATER FLUX TO CLIMATE VARIABILITY: REMOTE SENSING DRIVEN ANALYSIS OF GROSS PRIMARY PRODUCTION AND EVAPOTRANSPIRATION" (2018). Graduate Student Theses, Dissertations, & Professional Papers. 11284.
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© Copyright 2018 Mingzhu He