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 Gilles, Kustas W. P. (2022). Insights Into the aerodynamic versus radiometric surface temperature debate in thermal-based evaporation modeling. Geophysical Research Letters, 49 (15), e2021GL097568 [10 p.]. ISSN 0094-8276.
Titre du document
Insights Into the aerodynamic versus radiometric surface temperature debate in thermal-based evaporation modeling
Année de publication
2022
Auteurs
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 Gilles, Kustas W. P.
Source
Geophysical Research Letters, 2022,
49 (15), e2021GL097568 [10 p.] ISSN 0094-8276
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.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Bioclimatologie [072]
;
Télédétection [126]
Localisation
Fonds IRD [F B010085948]
Identifiant IRD
fdi:010085948
