A new retrieval for cloud liquid water path using a ground-based microwave radiometer and measurements of cloud temperature

James C. Liljegren, Eugene E. Clothiaux, Gerald G. Mace, Seiji Kato, Xiquan Dong

Research output: Contribution to journalArticle

131 Scopus citations

Abstract

A new method to retrieve cloud liquid water path using 23.8 and 31.4 GHz microwave radiometer brightness temperature measurements is developed. This method does not depend on climatological estimates of either the mean radiating temperature of the atmosphere Tmr or the mean cloud liquid water temperature Tcloud. Rather, Tmr is estimated from surface temperature and relative humidity measurements, while Tcloud is estimated using millimeter-wave cloud radar data, together with atmospheric temperature profiles obtained from either radiosonde or rapid update cycle (RUC) model output. Simulations demonstrate that the new retrieval method significantly reduces the biases in the liquid water path estimates that are apparent in a site-specific retrieval based on monthly stratified, local climatology. An analysis of the liquid water path estimates produced by the two retrievals over four case study days illustrates trends and retrieval performances consistent with the model simulations.

Original languageEnglish (US)
Article number2000JD900817
Pages (from-to)14485-14500
Number of pages16
JournalJournal of Geophysical Research Atmospheres
Volume106
Issue numberD13
DOIs
StatePublished - Jul 16 2001
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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