S - U
type: Concept

SPECMAP
type: Concept
definition: The SPECMAP Project contains climatic time series of the past 400,000 years, as well as basic downcore and core-top data from which these time series are derived. Downcore records include (1) quantitative data on planktonic species and assemblages which reflect conditions in the surface waters of the Atlantic Ocean; (2) estimates of sea-surface temperature derived from these faunal data; and (3) measurements of O-18, C-13 difference (planktic and benthic), and Cd/Ca. The age model used to transform each downcore record into a time series by correlation of its O-18 record with the published O-18 chronology of Imbrie et al. (1984) is given. Time series with uniformly spaced samples may be calculated by linear interpolation. The O-18 chronologies of Imbrie et al. (1984) and Martinson et al. (1987) are given for reference, as well as orbital time series taken from the work of Berger (1978a,b). Also archived are N. G. Kipp's Atlantic core-top foraminiferal data and SST equations FA20 and UW7 derived from them by procedures described in Kipp (1976). For more information, link to "ftp://www.ngdc.noaa.gov/paleo/paleocean/specmap/specmap1/readme_specmap1.txt" [Summary provided by NOAA]
in scheme: projects