The Atmospheric Infrared Sounder version 6 cloud products

TitleThe Atmospheric Infrared Sounder version 6 cloud products
Publication TypeJournal Article
Year of Publication2014
AuthorsKahn B.H, Irion F.W, Dang V.T, Manning E.M, Nasiri S.L, Naud C.M, Blaisdell J.M, Schreier M.M, Yue Q., Bowman K.W, Fetzer E.J, Hulley G.C, Liou K.N, Lubin D., Ou S.C, Susskind J., Takano Y., Tian B., Worden J.R
JournalAtmospheric Chemistry and Physics
Date Published2014/01
Type of ArticleArticle
ISBN Number1680-7316
Accession NumberWOS:000329930600023
Keywordscirrus; cirrus clouds; climate model; cyclones; diurnal cycle; instrument simulators; microphysical properties; midlatitude; mixed-phase clouds; radiative-transfer; satellite-observations; semitransparent

The version 6 cloud products of the Atmospheric Infrared Sounder (AIRS) and Advanced Microwave Sounding Unit (AMSU) instrument suite are described. The cloud top temperature, pressure, and height and effective cloud fraction are now reported at the AIRS field-of-view (FOV) resolution. Significant improvements in cloud height assignment over version 5 are shown with FOV-scale comparisons to cloud vertical structure observed by the CloudSat 94 GHz radar and the Cloud-Aerosol LIdar with Orthogonal Polarization (CALIOP). Cloud thermodynamic phase (ice, liquid, and unknown phase), ice cloud effective diameter (D-e), and ice cloud optical thickness (tau) are derived using an optimal estimation methodology for AIRS FOVs, and global distributions for 2007 are presented. The largest values of tau are found in the storm tracks and near convection in the tropics, while D-e is largest on the equatorial side of the midlatitude storm tracks in both hemispheres, and lowest in tropical thin cirrus and the winter polar atmosphere. Over the Maritime Continent the diurnal variability of tau is significantly larger than for the total cloud fraction, ice cloud frequency, and D-e, and is anchored to the island archipelago morphology. Important differences are described between northern and southern hemispheric midlatitude cyclones using storm center composites. The infrared-based cloud retrievals of AIRS provide unique, decadal-scale and global observations of clouds over portions of the diurnal and annual cycles, and capture variability within the mesoscale and synoptic scales at all latitudes.

Short TitleAtmos. Chem. Phys.
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