Validation of surface retrieved cloud optical properties with in situ measurements at the Atmospheric Radiation Measurement Program (ARM) South Great Plains site

DOI Web Site Web Site 被引用文献1件
  • Q.‐L. Min
    Atmospheric Sciences Research Center State University of New York Albany New York USA
  • M. Duan
    Atmospheric Sciences Research Center State University of New York Albany New York USA
  • R. Marchand
    Pacific Northwest National Laboratory Richland Washington USA

書誌事項

公開日
2003-09-11
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2003jd003385
公開者
American Geophysical Union (AGU)

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説明

<jats:p>Cloud optical properties inferred from a multifilter rotating shadowband radiometer have been validated against in situ measurements during the second ARM Enhanced Shortwave Experiment (ARESE II) field campaign at the ARM South Great Plains (SGP) site. On the basis of eight aircraft in situ vertical profiles (constructed from measurements), Forward Spectra Scattering Probe (FSSP), we find that our retrieved cloud effective radii for single‐layer warm water clouds agree well with in situ measurements, within 5.5%. A sensitivity study also illustrates that (for this case) a 13% uncertainty in observed liquid water path (LWP, 20 g/m<jats:sup>2</jats:sup>) results in 1.5% difference in retrieved cloud optical depth and 12.7% difference in inferred cloud effective radius, on average. The uncertainty of the LWP measured by the microwave radiometer (MWR) is the major contributor to the uncertainty of retrieved cloud effective radius. Further, we conclude that the uncertainty of our inferred cloud optical properties is better than 5% for warm water clouds based on a surface closure study, in which cloud optical properties inferred from narrowband irradiances are applied to a shortwave model and the modeled broadband fluxes are compared to a surface pyranometer.</jats:p>

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