Record Search Query:[Personnel: Last_Name='EARTH OBSERVATION HELP DESK']
SBUV2/NOAA-11 Ozone (O3) Profile and Total Column Ozone Monthly L3 Global 5.0deg Lat Zones V1.00 SBUV2N11L3zm at GES DISC Entry ID:
GES_DISC_SBUV2N11L3zm_V1
Abstract:
The Solar Backscattered Ultra Violet (SBUV) from NOAA-11 Level-3 monthly zonal mean (MZM) product (SBUV2N11L3zm) is derived from the Level-2 retrieved ozone profiles. Ozone retrievals are generated from the v8.6 SBUV algorithm. A Level-3 MZM file computes zonal means covering 5 degree latitude bands for each calendar month. For this product there are 147 months of data from January 1989 through ... March 2001. There are a total of 36 latitudinal bands, 18 in each hemisphere. Profile data are provided at 21 layers from 1013.25, 639.318, 403.382,254.517, 160.589, 101.325,63.9317, 40.3382, 25.4517, 16.0589, 10.1325, 6.39317,4.03382, 2.54517, 1.60589, 1.01325,0.639317, 0.403382, 0.254517, 0.160589 and 0.101325 hPa (measured at bottom of layer). NOTE: Some profiles have 20 layers and do not report the top most layer. Mixing ratios are reported at 15 layers from 0.5, 0.7, 1.0, 1.5, 2.0, 3.0, 4.0, 5.0, 7.0, 10.0, 15.0, 20.0, 30.0, 40.0 and 50.0 hPa (measured at middle of layer).
The MZM product averages retrievals that meet the criteria for a good retrieval as determined by error flags in the Level 2 data. A good retrieval is defined as satisfying the following conditions:
1) Profile Error Flag = 0 or 1 (0 = good retrieval; 1 = solar zenith angle > 84 deg.) 2) Total Error Flags = 0, 1, 2 or 5 (0 = good retrieval; 1 = not used; 2 = solar zenith angle > 84 deg; large discrepancy between profile total and best total ozone)
NOTE - Total error flag = 5 is anomalously applied at high latitudes and high solar zenith angle where B-Pair total ozone estimate is not as reliable as profile under these conditions. This error flag may be removed in future version of algorithm.
The zonal means computed for each month are screened according to the following statistical criteria:
1) number of good retrievals for the month greater than or equal to 2/3 of the samples for a nominal month. 2) mean latitude of good retrievals less than or equal to 1 degree from center of latitude band. 3) mean time of good retrievals less than or equal to 4 days from center of month (i.e., day = 15)
RICHARD
D
MCPETERS, PH. D Role:
INVESTIGATOR
Phone:
301-614-6038
Fax:
301-614-5903
Email:
richard.d.mcpeters at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 613.3 City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
JAMES
EDWARD
JOHNSON Role:
DIF AUTHOR
Phone:
301-614-5121
Email:
James.Johnson at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.2 City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
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