Last Glacial Maximum Sea Surface Temperature Estimates: Readme file
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                   NOAA Paleoclimatology Program
                               and
            World Data Center for Paleoclimatology, Boulder
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!


NAME OF DATA SET: Last Glacial Maximum Sea Surface Temperature Estimates

LAST UPDATE: 5/2001 (Original Receipt by WDCA Paleo)  
CONTRIBUTORS: Alan Mix, Oregon State University

IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2001-040

SUGGESTED DATA CITATION: Mix, A.C. et al., 2001, 
Last Glacial Maximum Sea Surface Temperature Estimates, 
IGBP PAGES/World Data Center for Paleoclimatology, Boulder 
Data Contribution Series #2001-040. 
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. 

ORIGINAL REFERENCE: Mix, A.C., A. E. Morey, N. G. Pisias and 
S. W. Hostetler, 1999.  Foraminiferal faunal estimates of 
paleotemperature: Circumventing the no-analog problem yields 
cool ice age tropics.  Paleoceanography, Vol. 14, No. 3, p. 350-359.

FUNDING SOURCE:  National Science Foundation, USA.

GEOGRAPHIC REGION: Global Ocean
PERIOD OF RECORD: Last Glacial Maximum, 18 KYrBP

LIST OF FILES: Readme_Mix1999.txt (this file), 
coretop_foram_26spp.txt, coretop_sstmean_residuals.txt,
downcore_foram_26spp.txt, fmatrix_foram_26spp.txt, 
lgm_foram_26spp.txt, lgm_osu_climap_anom.txt,
lgm_sstmean.txt (tab-delimited ASCII format).

DESCRIPTION:
Oregon State University Last Glacial Maximum Sea Surface Temperature Estimates
using the Down-core Transfer Function Method.


File coretop_foram_26spp.txt  
   This is the CORE-TOP foram data (26 species) used to calibrate the SST equation

Coretop_sstmean_residuals.txt
   This is SST (mean annual sea-surface temperature) Atlas values, transfer-function
   estimates and Residuals for core tops

Downcore_foram_26spp.txt
   This is the DOWN-CORE foram percentage data (26 species) used to create factors

Fmatrix_foram_26spp.txt
   This is the Factor Score Matrix derived from performing Q-mode Factor Analysis 
   on down-core data.  Note: Species list does not include G. menardii and G. tumida.  
   These species were counted, but are not included in this analysis of the data. 
   Input data for the factor analysis are percentages, closed on 26 spp. All species 
   percentage data were transformed by ln(species percentage + 1) before analysis. 

LGM_foram_26spp.txt
   This is the LGM foram data (26 species)

LGM_sstmean.txt
   This is the LGM Mean Annual sea surface temperature (SST) estimates, and SST 
   anomalies relative to gridded core-top estimates. 

LGM_osu_climap_anom.txt
   This is a gridded file of annual average LGM SST anomalies, OSU-CLIMAP. Three 
   columns are latitude, longitude, and SST anomaly.  NOTE THAT THESE ANOMALIES 
   ARE NOT LGM-MODERN, BUT INSTEAD ARE OSU_LGM - CLIMAP_LGM. 
   SST_DIFF values are calculated in the latitude-longitude region 140W-20E, 
   20S-20N.  All other differences are defined as zero.  This file is provided for 
   simple addition to the CLIMAP seasonal boundary conditions, to test the effect 
   of changing mean annual temperature in the designated region, without modifying 
   the seasonal cycle as defined by CLIMAP (1981). This file was used along with 
   those of CLIMAP (1981) to calculate boundary conditions for the climate model 
   study of Hostetler, S.W,. and A.C. Mix (1999) Reassessment of ice-age cooling 
   of the tropical ocean and atmosphere. Nature 399, 673-676.