First ISCCP Regional Experiment (FIRE) Atlantic Stratocumulus Transition Experiment (ASxTEX) ECMWF Basic Fields Data

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 ECMWFduring 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 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 best compared with data three hours after the base time.Data Set Name ECMWF ECMWF Time Field Units Field ID# range Abbrev.------------- ------ ----- ----- ----- -----BASIC Z 129 I Geopotential m^2/s^2 T 130 I Temperature K Q 133 I Specific humidity kg/kg U 131 I U[ eastward]-velocity m/s V 132 I V[northward]-velocity m/s W 135 I Vertical velocity Pa/s(lat/lon range: 85W to 15E, 70N to 10N)(levels: 1010,1000,975,950,925,900,875,850,825,800,775,750,700,650,600,550,500,400,300,200,100 hPa)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.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated June 23, 2026, 00:46 (UTC)
Created April 1, 2025, 15:45 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 81f1f466-7488-4edd-b5d5-ecb766ea4e78
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.5067/ASDC_DAAC/FIRE/0023
license https://www.usa.gov/government-works
modified 2026-06-15T22:16:01Z
programCode {026:000}
publisher NASA/LARC/SD/ASDC
resource-type Dataset
source_datajson_identifier true
source_hash e6ea812735284f6aae4caac353701937c5cfb8294b3cc98250dd98b937abb681
source_schema_version 1.1
spatial ["CARTESIAN", [{"Boundary": {"Points": [{"Latitude": 10, "Longitude": -85}, {"Latitude": 10, "Longitude": 15}, {"Latitude": 70, "Longitude": 15}, {"Latitude": 70, "Longitude": -85}, {"Latitude": 10, "Longitude": -85}]}}]]
temporal 1992-06-01/1992-06-28
theme {"Earth Science"}