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https://hdl.handle.net/2440/136388
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Type: | Journal article |
Title: | Insights Into the Aerodynamic Versus Radiometric Surface Temperature Debate in Thermal-Based Evaporation Modeling |
Author: | Mallick, K. Baldocchi, D. Jarvis, A. Hu, T. Trebs, I. Sulis, M. Bhattarai, N. Bossung, C. Eid, Y. Cleverly, J. Beringer, J. Woodgate, W. Silberstein, R. Hinko-Najera, N. Meyer, W.S. Ghent, D. Szantoi, Z. Boulet, G. Kustas, W.P. |
Citation: | Geophysical Research Letters, 2022; 49(15):e2021GL097568-1-e2021GL097568-10 |
Publisher: | American Geophysical Union (AGU) |
Issue Date: | 2022 |
ISSN: | 0094-8276 1944-8007 |
Statement of Responsibility: | Kaniska Mallick, Dennis Baldocchi, Andrew Jarvis, Tian Hu, Ivonne Trebs, Mauro Sulis, Nishan Bhattarai, Christian Bossung, Yomna Eid, Jamie Cleverly, Jason Beringer, William Woodgate, Richard Silberstein, Nina Hinko-Najera, Wayne S. Meyer, Darren Ghent, Zoltan Szantoi, Gilles Boulet, and William P. Kustas |
Abstract: | Global evaporation monitoring from Earth observation thermal infrared satellite missions is historically challenged due to the unavailability of any direct measurements of aerodynamic temperature. State-of-the-art one-source evaporation models use remotely sensed radiometric surface temperature as a substitute for the aerodynamic temperature and apply empirical corrections to accommodate for their inequality. This introduces substantial uncertainty in operational drought mapping over complex landscapes. By employing a non-parametric model, we show that evaporation can be directly retrieved from thermal satellite data without the need of any empirical correction. Independent evaluation of evaporation in a broad spectrum of biome and aridity yielded statistically significant results when compared with eddy covariance observations. While our simplified model provides a new perspective to advance spatio-temporal evaporation mapping from any thermal remote sensing mission, the direct retrieval of aerodynamic temperature also generates the highly required insight on the critical role of biophysical interactions in global evaporation research. |
Rights: | © 2022 The Authors.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
DOI: | 10.1029/2021GL097568 |
Grant ID: | http://purl.org/au-research/grants/arc/DE190101182 |
Published version: | http://dx.doi.org/10.1029/2021gl097568 |
Appears in Collections: | Geology & Geophysics publications |
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hdl_136388.pdf | Published version | 3.15 MB | Adobe PDF | View/Open |
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