Comprehensive Ocean-Atmosphere Data Set (COADS): Trimmed Monthly Summaries

The data are here.

BRIEF

(Cited from COADS)

"In January 1981, a cooperative project was planned to create a consistent and easily used historical record of surface marine data for the period 1854-1979 (Woodruff, et al., 1987). Members of this project were the National Climatic Data Center (NCDC), Environmental Research Laboratories, the cooperative Institute for Research in Environmental Sciences, and the National Center for Atmospheric Research. The culmination of four years of work resulted in the Comprehensive Ocean-Atmosphere Data Set (COADS) (Slutz, et al., 1985, hereafter referred to as COADS Release 1)."

"One of the many products of COADS was a unique set of surface marine ship reports in a modified TD-1129 format covering the period 1854-1979 (TD-1170). This document provides information only for COADS pre-1970s surface marine data. A similar COADS product covering the period 1970-1979 (TD-1129) is described in a Marine Data Users Reference, 1970-current (NCDC, 1986). Data Prior to 1854 is contained in the Maury collection."

"Products now available in a first release from this Comprehensive Ocean-Atmosphere Data Set (COADS) include fully quality-controlled (trimmed) reports and summaries. Global marine data observed during 1854-1979, primarily by ships-of-opportunity, have been collected, edited, and summarized statistically for each month of the period, using 2 degree latitude x 2 degree longitude boxes. Each of the 70 million unique reports contain 28 elements of weather, position, etc., as well as flags indicating which observations were statistically trimmed. The summaries give l4 statistics, such as the median and mean, for each of eight observed variables of air and sea surface temperatures, wind, pressure, humidity, and cloudiness, plus ll derived variables. Relatively noisy (untrimmed) individual reports and summaries (giving l4 statistics for each of the eight observed variables) are available for investigators who prefer their own quality control. Two other report forms, inventories, and decade-month summaries are among the other products available. FORTRAN 77 software available to help read 'packed binary' data products and processing details, such as the method of identifying duplicate reports, are also available."

"The Compressed Marine Reports contain 28 frequently used parameters, omitting individual ship numbers. Statistical outliers are flagged. The entire set is stored in binary format. Refer to COADS Release 1, Supplement E, for further details. The Long Marine Reports contain the complete observational record of the platform which contributed the data, as well as quality flags. The data are stored in a hybrid format of packed binary and character. Further information on format is available in COADS Release 1, Supplement F. Character-formatted Long Marine Reports, a subset of the Long Marine Reports, are stored in ASCII character format, more fully described in Supplement I of COADS, Release 1."

"The Decadal and Monthly Summaries are averaged by decade and month over either 10 x 10 or 2 x 2 latitude-longitude boxes. In trimmed versions of these summaries statistical outliers and data located over land have been removed. The data are stored in packed binary format. Further details can be obtained from COADS Release 1, Supplement A."

"Monthly Summary Trimmed and Untrimmed Groups (the former is the only kind presented here in LDEO -- AK) contain fewer variables and fewer statistical parameters than the monthly summaries. The sort is by year, month and 2 degree latitude-longitude box. This product is the most compact and generally the most convenient to use for studies involving only a few variables and statistical parameters. COADS Release 1, Supplement B gives further details."

SPECIFIC FEATURES OF LOCAL (LDEO, Climate Modelling Group) STORAGE

Our data are a subset of the original COADS MSTG (Monthly Summary Trimmed Groups) data. The following variables are included:
u
Zonal Wind Velocity (m/s)
v
Meridional Wind Velocity (m/s)
|u|
Windspeed (m/s)
slp
Sea Level Pressure (mb)
sst
Sea Surface Temperature (C)
tair
Air Temperature (C)
shum
Specific Humidity (g/kg)
and they are characterized by the following statistical values describing the monthly populations of 2x2 geographical boxes:
mean
mean data
stdev
standard deviation
nobs
number of observations
xlon
mean longitude of observations
ylat
mean latitude of observations
Data were extracted from COADS tapes and rewritten into economical direct access format on disk by Alexey Kaplan, alexeyk@rainbow.ldgo.columbia.edu in March, 1994.

ATTRIBUTES

 
Temporal Coverage:
     From: 1854-01                 TO:  1992-12
 
Geographic Coverage:
     Southwest Extent: 90S,180W    Northeast Extent:  90N,180E
 
Source:
     BUOYS
     SHIPS>Ships-of-Opportunity, Buoys, etc.
 
Sensor:
     XBT>External Bathythermographs
 
Campaign/Project:
     COADS>Comprehensive Ocean-Atmosphere Data Set
 
Discipline, Subdiscipline:
     EARTH SCIENCE                   > ATMOSPHERE
     EARTH SCIENCE                   > OCEAN
 
Location Keyword:
     GLOBAL
     SEA SURFACE
 
Parameter Group, Parameter:
 
     ATMOSPHERIC DYNAMICS            > ATMOSPHERIC TEMPERATURE
        air temperature
 
 
     ATMOSPHERIC DYNAMICS            > PRESSURE
        sea level pressure
 
 
     ATMOSPHERIC DYNAMICS            > WINDS
        wind direction
 
     OCEAN DYNAMICS                  > TEMPERATURE
        sea surface temperature
 
 
General Keywords:
     AIR-SEA INTERACTION
     CLIMATOLOGY
     COADS
     GRID DATA
     MARINE
     MONTHLY DATA
     PHYSICAL OCEANOGRAPHY
     SEA SURFACE TEMPERATURE
     STATISTICS
     SURFACE
     WIND STRESS
 
Revision Date: 1994-06-09
 
                                             

DATACENTER

Archive: 
   JPL/PHY OCEAN>Physical Oceanography Distributed Active Archive Center
 
   Contact: USER SERVICE OFFICE,  
            MS 300-323
            Jet Propulsion Laboratory
            4800 Oak Grove Drive
            Pasadena, CA 91109
            USA
 
            Electronic Mail: INTERNET> PODAAC@SHRIMP.JPL.NASA.GOV
                             NSI/DECNET> SHRIMP::PODAAC
                             OMNET> PO.DAAC.JPL
 
            Phone: (818) 354-0906
                   (818) 393-6720 (fax)
 
Archive: 
   NCAR>National Center for Atmospheric Research
   Data Set ID: CMR.5 
                DST 
                DSU 
                DSUL 
 
   Contact: JOSEPH, DENNIS 
            National Center for Atmospheric Research
            Data Support Section
            P.O. Box 3000
            Boulder, CO  80307
            USA
 
            Electronic Mail: INTERNET> JOSEPH@BIERSTADT.SCD.UCAR.EDU
 
            Phone: 303-497-1216
 
Archive: 
   NCDS>NASA Climate Data System
   Data Set ID: COADS_MSTG 
 
   Contact: OLSEN, LOLA 
            GSFC Distributed Active Archive Center
            NASA/GSFC
            Code 902.2
            Greenbelt, MD 20771
            USA
 
            Electronic Mail: INTERNET> OLSEN@NSSDCA.GSFC.NASA.GOV
                             NSI/DECNET> NCF::OLSEN
 
            Phone: (301) 286-9760
                   FTS 888-9760
 
Archive: 
   NOAA/NESDIS/NCDC>National Climatic Data Center, NOAA
   Data Set ID: TD-1169 
                TD-1170 
 
   Contact: ROSS, THOMAS 
            NOAA/NESDIS/NCDC
            Federal Building
            37 Battery Park Avenue
            Asheville, NC 28801-2733
            USA
 
            Electronic Mail: INTERNET> TROSS@NCDC.NOAA.GOV
 
            Phone: (704) 271-4994
                                             

PERSONNEL

Investigator: JENNE, ROY 
              National Center for Atmospheric Research (NCAR)
              P.O. Box 3000
              Boulder, CO 80307-3000
              USA
 
              Electronic Mail: OMNET> R.JENNE
 
              Phone: (303) 497-1215
 
Tech Contact: WOODRUFF, SCOTT 
              Climate Research Program
              NOAA/ERL (R/E/R6)  NCAR
              325 Broadway
              Boulder CO, 80303
              USA
 
              Phone: (303) 497-6747
 
                                             

REFERENCE


Slutz, R.J., S.J. Lubker, J.D. Hiscox, S.D. Woodruff, R.L. Jenne, P.M. Steurer,
and J.D. Elms, 1985: 'Comprehensive Ocean-Atmosphere Data Set; Release 1',
Climate Research Program, Boulder, Colorado.

*************************************************************************** Original entry from NASA

Entry Author: SMITH, ELIZABETH A. Center for Coastal Physical Oceanography Crittenton Hall Old Dominion University Norfolk, VA 23529 USA Electronic Mail: INTERNET> lizsmith@kuroshio.ccpo.odu.edu Phone: (804) 683-5550 (FAX) (804) 683-5567 Information in the entry provided by NODS *****************************************************************

SUP_MENU

   1. Data Center: NCAR>National Center for Atmospheric Research
  
   2. Data Center: NCDS>NASA Climate Data System
  
   3. Campaign: COADS>Comprehensive Ocean-Atmosphere Data Set
  
   4. Sensor: BATHYTHERMOGRAPHS>External Bathythermographs