The Impact of ATOVS Radiance in MERRA Reanalysis

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$A 10 year climatology of cloud fraction and vertical distribution ...$

Radiosonde, PIBAL wind, aircraft report, dropsonde, surface land observationPre-sat era stream (PRES)Reduced observing system segment (ROSS) 1GMS & METEOSAT cloud drift wind, ship & buoy observationPAOBTOVSMERRA stream 12SSM/I3Spinup 1ERS surface windWind profilesMERRA stream 24GOES cloud drift windTMI rain5ATOVS (NOAA-15)QuikSCAT surface wind6ATOVS (NOAA-16)GOES SoundersSpinup27MODIS windAIRSMERRA stream 370 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12
ROSS 1 7Pre-sat era stream MERRA stream 1 MERRA stream 2 MERRA stream 3 Patch 1: to correct TOVS etc. impact Patch 2: to correct SSM/I impact Patch 3: to correct scatterometer surface wind impact Patch 4: to correct GEOS cloud drift wind impact Patch 5: to correct ATOVS (NOAA 15) impact Patch 6: to correct ATOVS (NOAA 16) impact Patch 7: to correct AIRS, MODIS impactExtended Homogenized MERRA data• Patches are applied on the MERRA data before the associated new observation, so the MERRA data inearlier period can be adjusted to match with data in later period.• A pre-satellite era stream (1970 – 1979) will be produced, so the MERRA data can be extended to 1970.Including this period is important for climate change trend study, as the long-term trend can be distinguishedfrom natural decadal variation by including the 1976 phase change of PDV into the timeseries (Chen et al.2008).
Page 1 and 2: The Impact of ATOVSRadiance in MERR
Page 3 and 4: At the Beginning, the Idea of Reana
Page 5 and 6: Features in the NASA MERRA reanalys
Page 10 and 11: The impact of NOAA15 (ATOVS)A two y
Page 12 and 13: The precipitation difference betwee
Page 14 and 15: Change of moisture mainly in the lo
Page 16 and 17: Precipitation removes the additiona
Page 18 and 19: At most areas, the analysis tempera
Page 20 and 21: Associated with the introduction of

The Impact of ATOVS Radiance in MERRA Reanalysis

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