Determination of ice water path in ice-over-water cloud systems using combined MODIS and AMSR-E measurements

Details Determination of ice water path in ice-over-water cloud systems using combined MODIS and AMSR-E measurements Determination of ice water path in ice-over-water cloud systems using combined MODIS and AMSR-E measurements

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3321801h&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 21, CiteID L21801

Physics

8

Atmospheric Composition And Structure: Cloud Physics And Chemistry, Global Change: Climate Dynamics (0429, 3309), Atmospheric Processes: Radiative Processes

Scientific paper

To provide more accurate ice cloud microphysical properties, the multi-layered cloud retrieval system (MCRS) is used to retrieve ice water path (IWP) in ice-over-water cloud systems globally over oceans using combined instrument data from Aqua. The liquid water path (LWP) of lower-layer water clouds is estimated from the Advanced Microwave Scanning Radiometer for EOS (AMSR-E) measurements. The properties of the upper-level ice clouds are then derived from Moderate Resolution Imaging Spectroradiometer (MODIS) measurements by matching simulated radiances from a two-cloud-layer radiative transfer model. The results show that the MCRS can significantly improve the accuracy and reduce the over-estimation of optical depth and IWP retrievals for ice-over-water cloud systems. The mean daytime ice cloud optical depth and IWP for overlapped ice-over-water clouds over oceans from Aqua are 7.6 and 146.4 gm-2, respectively, down from the initial single-layer retrievals of 17.3 and 322.3 gm-2. The mean IWP for actual single-layer clouds is 128.2 gm-2.

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