CLIMAP 18K Database: Climap18.readme file
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               World Data Center A- Paleoclimatology
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!


NAME OF DATA SET: CLIMAP 18K Database
LAST UPDATE: 1984 
CONTRIBUTORS: CLIMAP Project Members
IGBP PAGES/WDCA Data Contribution Series #: 94-001

SUGGESTED DATA CITATION: 
CLIMAP Project Members, 1994, CLIMAP 18K Database.  IGBP PAGES/
World Data Center-A for Paleoclimatology Data Contribution Series # 94-001.  
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

ORIGINAL REFERENCES:

CLIMAP PROJECT MEMBERS, 1981, SEASONAL RECONSTRUCTION OF THE EARTH'S
SURFACE AT THE LAST GLACIAL MAXIMUM, GEOLOGICAL SOCIETY OF
AMERICA, MAP AND CHART SERIES #36.

CLIMAP PROJECT MEMBERS, 1976, The surface of the Ice-Age Earth, 
Science 191, 1131-1137.

GATES, W.L. AND A.B. NELSON - * A NEW ( REVISED ) TABULATION OF
THE SCRIPPS TOPOGRAPHY ON A 1 DEGREE GLOBAL GRID. PARTII
OCEAN DEPTHS * - THE RAND CORPORATION, ARPA 
ORDER NO. 189-1 -OCTOBER, 1975.

GATES, W.L. AND A.B. NELSON - * A NEW ( REVISED ) TABULATION OF
THE SCRIPPS TOPOGRAPHY ON A 1 DEGREE GLOBAL GRID. PART I
TERRAIN HEIGHTS * - THE RAND CORPORATION, R-1276-1-ARPA -SEPTEMBER, 1975.

GEOGRAPHIC REGION: Global
PERIOD OF RECORD: 18,000 YBP and modern

LIST OF FILES: climap18k.readme (this file), 
Original CLIMAP raw data and doc files sed.dat,  sed.doc, sst.doc.
WDCA-produced individual raw data files coccos.txt, diatoms.txt, forams.txt,
minerals.txt, rad_hays.txt, rads.txt, sites.txt, sst_est.txt, sst_obs.txt,
strat.txt, time.txt.
CLIMAP interpretation files: (see sst.doc for details) 
elevbath.18k.climap13, elevbath.modern.climap3
glacialice.18k.climap19, glacialice.modern.climap9
relieftype.18k.climap16, relieftype.modern.climap6
soilexp.18k.climap18, soilexp.modern.climap8
soiltype.18k.climap15, soiltype.modern.climap5
sst.18k.aug.climap11, sst.18k.feb.climap12
sst.modern.aug.climap1, sst.modern.feb.climap2
vegpct.18k.climap20, vegpct.modern.climap10
vegtype.18k.climap14, vegtype.modern.climap4
waterpct.18k.climap17, waterpct.modern.climap7

DESCRIPTION:
This data set contains the data files of the CLIMAP project for 18,000 BP, 
including planktonic counts and core mineralogy, earth surface 
classifications, albedo, and derived sea surface temperature estimates.  
Raw data are contained in the file SED.DAT, and sea surface 
temperature estimates and surface conditions are in the CLIMAP interpretation 
files.  See SST.DOC (excerpted below) and SED.DOC for 
documentation of data and SST models. 

Minor corrections were made to files CLIMAP11 and CLIMAP12 in
July 1993.  Specifically, line 898 of both files had one missing
and one out of place value corrected in columns 45-55, and a bad 
value (0) in column 70 of CLIMAP12 was replaced.  The missing values 
were replaced by sea ice values (-444) by context.

CLIMAP SURFACE CONFIGURATION DATA BASE

THIS DATA BASE CONTAINS RAW DATA FOR CERTAIN 
CLIMATIC BOUNDARY CONDITIONS (EG. SEA SURFACE 
TEMPERATURE) DURING THE LAST GLACIAL MAXIMUM 
AND EQUIVALENT DATA FOR THE PRESENT. THE MEAN 
ESTIMATED DATE FOR THE LAST GLACIAL MAXIMUM IS 
18,000 YEARS BP. THE DATA HAVE BEEN USED BY CLIMAP 
PROJECT MEMBERS FOR A RECONSTRUCTION OF GLACIAL 
CONDITIONS AND COMPARISON WITH PRESENT 
CONDITIONS.  SEE REFERENCE 1 FOR FURTHER 
INFORMATION.