First ISCCP Regional Experiment (FIRE) Atlantic Stratocumulus Transition Experiment (ASTEX) ECMWF Surface Diagnostics

ECMWF has requested that anyone making use of this data set acknowledge them, and that those investigators publishing researchthat makes more than casual use of this data set contact Ernst Klinker or Tony Hollingsworth.The data have been decoded by Chris Bretherton into ASCII files, one for each horizontal field at a given level and base time. All data have the same horizontal resolution of 1.25 degrees in latitude and longitude and correspond to base (initialization) times of 00, 06, 12, or 18Z.

Different fields have different lat/lon ranges and sets of available vertical levels, as tabulated below. Also, some fields are instantaneous (I) while others are accumulated (A) over the first 6 hours of a forecast initialized at the base time. This is tabulated in the 'time range' column below.

Instantaneous fields are bestcompared with data at the base time, while accumulated fields are bestcompared with data three hours after the base time.Data Set Name ECMWF ECMWF Time Field Units field ID# range abbrev.----------- ------ ----- ----- ----- -----SURFACE DIAG LSP 142 A Large scale precipitation m/(6 hr) CP 143 A Convective precipitation m/(6 hr) BLD 145 A Boundary layer dissipation W/m^2 SSHF 146 A Surface sensible heat flux W/m^2 SLHF 147 A Surface latent heat flux W/m^2 TCC 164 I Total cloud cover 0-1 10U 165 I 10 meter u m/s 10V 166 I 10 meter v m/s 2T 167 I 2 meter temperature K 2D 168 I 2 meter dewpoint temperature K SSR 176 A Surface solar radiation W/m^2 STR 177 A Surface thermal radiation W/m^2 TSR 178 A Top solar radiation W/m^2 TTR 179 A Top thermal radiation W/m^2 EWSS 180 A U-stress N/m^2 NSSS 181 A V-stress N/m^2 E 182 A Evaporation m (H2O) CCC 185 I Convective cloud cover 0-1 LCC 186 I Low cloud cover 0-1 MCC 187 I Medium cloud cover 0-1 HCC 188 I High cloud cover 0-1 TSRU 208 I Top solar radiation upward W/m^2 TTRU 209 I Top thermal radiation upward W/m^2 TSUC 210 I Top solar radiation upward clear sky(lat/lon range: 35W to 05W, 20N to 45N; at surface pressure)The ECMWF field abbreviation, ID#, field description and units are taken directly from ECMWF Code Table 2, in case you ever need to consult with ECMWF about this data set.