Abstract:
A special set of analysis products for the Atlantic Stratocumulus
Transition Experiment (ASTEX) region during June 1-28, 1992 was
prepared by Ernst Klinker and Tony Hollingsworth of the European
Centre for Medium-range Forecasting (ECMWF), and reformatted by Chris
Bretherton of Univ. of Washington. These analyses, or more correctly
initializations and very short range forecasts using the ECMWF
... T213L30
operational model, incorporate routine observations from the global
network and special soundings from ASTEX that were sent to ECMWF
during ASTEX via the GTS telecommunication system. About 650 special
soundings were incorporated, including nearly all soundings from Santa
Maria, Porto Santo, and the French ship Le Suroit, most of the
soundings taken on the Valdivia and Malcolm Baldridge, and almost none
of the soundings from the Oceanus. Surface reports from the research
ships were also incorporated into the analyses after the first week of
the experiment. Aircraft soundings were not included in the analyses.
ECMWF has requested that anyone making use of this data set
acknowledge them, and that those investigators publishing research
that 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 best
compared with data at the base time, while accumulated fields are best
compared with data three hours after the base time.
Data Set Name ECMWF ECMWF Time Field Units
field ID# range
abbrev.
------------ ------ ----- ----- ----- -----
DIAGNOSTIC DHR 214 A Diabatic heating by radiation K/s
DHVD 215 A Diab. heat. by vert. diffusion K/s
DHCC 216 A Diab. heat. by cu. convection K/s
DHLC 217 A Diab. heat. by lg-scale condens.K/s
VDZW 218 A Vert. diffusion of zonal wind m^2/s^3
VDMW 219 A Vert. diffusion of meri. wind m^2/s^3
EWGD 220 A E-W gravity wave drag m^2/s^3
NSGD 221 A N-S gravity wave drag m^2/s^3
CTZW 222 A Convective tend. of zonal wind m^2/s^3
CTMW 223 A Convective tend. of meri. wind m^2/s^3
VDH 224 A Vertical diffusion of humidity kg/(kg s)
HTCC 225 A Humid. tend. by cu. convection kg/(kg s)
HTLC 226 A Humid. tend. by lg-scale cond. kg/(kg s)
ATT 228 A Adiabatic tend. of temperature K/s
ATH 229 A Adiabatic tend. of humidity kg/(kg s)
ATZW 230 A Adiabatic tend. of zonal wind m/s^2
ATMW 231 A Adiabatic tend. of meri. wind m/s^2
232 A
(lat/lon range: 35W to 05W, 20N to 45N)
(levels: 1010,1000,975,950,925,900,875,850,825,800,775,750,700)
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. 
