Raindrop Signature from Microwave Radiometer Over Deserts - Sorbonne Université
Article Dans Une Revue Geophysical Research Letters Année : 2020

Raindrop Signature from Microwave Radiometer Over Deserts

Yalei You
  • Fonction : Auteur
S. Joseph Munchak
  • Fonction : Auteur
Ralph Ferraro
  • Fonction : Auteur
Karen Mohr
  • Fonction : Auteur
Christa Peters-Lidard
Sarah Ringerud
  • Fonction : Auteur
Scott Rudlosky
  • Fonction : Auteur
Heshun Wang
  • Fonction : Auteur
Hamidreza Norouzi
  • Fonction : Auteur
Satya Prakash
  • Fonction : Auteur

Résumé

Rainfall estimates from spaceborne microwave radiometers form the foundation of global precipitation data sets. Since the beginning of the satellite microwave rainfall estimation era in the 1980s, the primary signature leveraged over land for these estimates has been the brightness temperature (TB) depression due to ice particle scattering. Contrary to this practice, time series analyses based on observations from two spaceborne radars and two spaceborne radiometers reveal a TB increase at H19 due to raindrop emission as the primary cloud particle signature over desert terrain. Low surface emissivity supports the use of liquid raindrop emission as the primary signature over desert surfaces. In these regions, the surface rain rate better correlates with the liquid raindrop emission signal than with the scattering induced by ice further aloft, suggesting a new potential for improving rainfall estimation over deserts by exploiting the liquid raindrop emission signature.
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Dates et versions

hal-03045700 , version 1 (23-02-2023)

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Copyright (Tous droits réservés)

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Yalei You, S. Joseph Munchak, Ralph Ferraro, Karen Mohr, Christa Peters-Lidard, et al.. Raindrop Signature from Microwave Radiometer Over Deserts. Geophysical Research Letters, 2020, 47 (16), ⟨10.1029/2020GL088656⟩. ⟨hal-03045700⟩
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