This data set contains calculations of shortwave and longwave fluxes at the top of the atmosphere, in the atmosphere, and at the surface obtained using the Goddard Institute for Space Studies General Circulation Model radiation code and physical quantities based on datasets from ISCCP. In support of the Tropical Ocean Global Atmosphere - Coupled Ocean-Atmosphere Response Experiment (TOGA-COARE), these fluxes are reported for the experiment domain and time period based on cloud measurements from GMS-4.
The principal investigator for this data set is William B. Rossow of the Goddard Institute for Space Studies (GISS), who has subsetted this data set both temporally and spatially to conform to the TOGA COARE Field Campaign.
The production and distribution of this data set are being funded by NASA's Mission To Planet Earth Program. The data are not copyrighted, however we request that when you publish data or results using these data, please acknowledge as follows:
The authors would like to thank the International Satellite Cloud Climatology Project (ISCCP), Goddard Institute for Space Studies and the Distributed Active Archive Center (Code 610.2) at the Goddard Space Flight Center, Greenbelt, MD 20771 for the production and distribution of these data, respectively. These Activities are sponsored by NASA's Earth Science Enterprise (ESE).
1.1 Temporal Coverage and Resolution. All times are in GMT. The temporal coverage for the TOGA COARE campaign and for this ISCCP subset is 4 months from November 1, 1992 through February 28, 1993. The sampling intervals are 3 hours for the GMS4 sensors.
1.2 Spatial Coverage and Resolution. The ISCCP subsets for the TOGA COARE campaign cover the region:
Longitude: 120 E --> 10 W
Latitude: 20 S --> 20 N
The spatial resolution is about 280 (2.5 degrees latitude - longitude)
1.3 Flight coordination table. The following table relating ER-2 and DC-8 flight numbers to the dates of the 13 mission flights of the NASA/TOGA COARE campaign provides correlation with airborne data acquisition activities during the TOGA COARE intensive operating period. The mission objective for each mission flight defaulted to radiation unless convection was forecast in the target area.
Date(UTC) ER-2 Flight DC-8 Flight Objective
Jan 11-12 93-053 93-01-06 Radiation Jan 17-18 93-054 93-01-07 Convection Jan 18-19 93-055 93-01-08 Convection Jan 25-26 93-056 93-01-09 Radiation Jan 28-29 93-057 jan 31-Feb 1 93-058 93-01-10 Radiation Feb 2 93-059 Feb 4 93-060 93-01-11 Convection Feb 6 93-01-12 Convection Feb 7 93-061 Feb 8-9 93-062 93-01-13 Convection Feb 10-11 93-063 93-01-14 Convection Feb 17-18 93-01-15 Convection Feb 20-21 93-065 93-01-16 Convection Feb 22-23 93-066 93-01-17 Convection Feb 23-24 93-067 93-01-18 Radiation
The radiative fluxes are calculated from physical quantities based on ISCCP datasets. For additional information, see the published papers of Rossow et al.(1995) and Zhang et al.(1995).
The ISCCP Flux TOGA COARE subset consists of 953 binary data files and is ~78.2 MB in volume. Files are named 'FC_DT_KA.YYMMDDHH' where YY=92, 93 (year), MM=11, 12, 1, 2 (month), DD=01, 02,.., 31 (date) and HH=00, 03, .. 21 (GMT).
(1) SW downwelling at TOA;
(2) SW upwelling at TOA;
(3) SW downwelling at SRF;
(4) SW upwelling at SRF;
(5) LW upwelling at TOA;
(6) LW upwelling at SRF;
(7) LW downwelling at SRF;
(8) SW upwelling at TOA for 100% overcast;
(9) SW downwelling at SRF for 100% overcast;
(10) SW upwelling at SRF for 100% overcast;
(11) LW upwelling at TOA for 100% overcast;
(12) LW upwelling at SRF for 100% overcast;
(13) LW downwelling at SRF for 100% overcast;
(14) SW upwelling at TOA for clear sky;
(15) SW downwelling at SRF for clear sky;
(16) SW upwelling at SRF for clear sky;
(17) LW upwelling at TOA for clear sky;
(18) LW upwelling at SRF for clear sky;
(19) LW downwelling at SRF for clear sky;
(20) Cosine solar zenith angle (0 --> 1);
(21) Cloud fraction (0 --> 1);
(22) Cloud top T (K);
(23) Cloud TAU;
(24) Surface T (K);
(25) Surface reflectance form D1/C2;
(26) Actually used surface reflectance;
(27) Surface air T (K);
(28) Cloud top pressure (mb);
(29) Cloud base pressure (mb);
(30) Surface pressure (mb);
(31) T at 900 mb;
(32) T at 740 mb;
(33) T at 620 mb;
(34) T at 500 mb;
(35) T at 375 mb;
(36) T at 245 mb;
(37) T at 115 mb;
(38) Pressure of tropopause;
(39) T at tropopause;
(40) T at 50 mb of stratosphere;
(41) T at 15 mb of stratosphere;
(42) Precipitable water (cm) for layer of 900 mb;
(43) Precipitable water (cm) for layer of 740 mb;
(44) Precipitable water (cm) for layer of 620 mb;
(45) Precipitable water (cm) for layer of 500 mb;
(46) Precipitable water (cm) for layer of 375 mb;
(47) Column ozone amount (Dobson);
(48) Total precipitable water (cm) for all 5 tropospheric layers;
Access ISCCP Flux
files online
The following Fortran 77 code was provided by the data producer to read the ISCCP Flux data files.
OPEN(UNIT=71,FILE=UNIXFI,
* STATUS='OLD',ACCESS='direct',recl= 1792,FORM='UNFORMATTED',
* IOSTAT=IOS)
C: UNIXFI is in CHARACTERS defining the data file under specific UNIX
C: environments
C: The direct-access rec. number corresponds to the serial number
C: for each of the 48 parameters;
C: i = lon: 49 --> 76 (E120 -- 190) & j = Lat: 29 --> 44 (S20 -- N20)
do 688 k = 1, 48
WRITE(71,rec=k)((flux(i,j,k),i=49,76),j=29,44)
688 continue
CLOSE(71)
ISCCP Radiative Fluxes is an analyzed, gridded data set. Quality assessment information for this dataset may be found in the published work of Zhang and Rossow.
Edee Ocampo GES DISC Code 610.2 NASA Goddard Space Flight Center Greenbelt, MD 20771 Edee.Ocampo@nasa.gov (301) 614-5376 (voice) (301) 614-5268 (Fax)
Principal Investigator:
W. Rossow
Goddard Institute for Space Studies
2880 Broadway
New York, NY 10025
wrossow@giss.nasa.gov
(212) 678-5567 (voice)
Angel L. Suarez Goddard Institute for Space Studies 2880 Broadway New York, NY 10025 asuarez@giss.nasa.gov (212) 678-5518 (voice)
The TOGA COARE data is part of the Goddard DISC's permanent field campaign archive.
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