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Author Poore, Richard Z ♦ Dowsett, Harry J ♦ Verardo, Stacey ♦ Quinn, Terrence Michael
Source PANGAEA
Content type Text
Publisher PANGAEA
File Format TSV
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Earth sciences ♦ Geology, hydrology & meteorology
Subject Keyword Lithosphere
Abstract Proxy records from two piston cores in the Gulf of Mexico (GOM) provide a detailed (50-100 year resolution) record of climate variability over the last 14,000 years. Long-term (millennial-scale) trends and changes are related to the transition from glacial to interglacial conditions and movement of the average position of the Intertropical Convergence Zone (ITCZ) related to orbital forcing. The d18O of the surface-dwelling planktic foraminifer Globigerinoides ruber show negative excursions between 14 and 10.2 ka (radiocarbon years) that reflect influx of meltwater into the western GOM during melting of the Laurentide Ice Sheet. The relative abundance of the planktic foraminifer Globigerinoides sacculifer is related to transport of Caribbean water into the GOM. Maximum transport of Caribbean surface waters and moisture into the GOM associated with a northward migration of the average position of the ITCZ occurs between about 6.5 and 4.5 ka. In addition, abundance variations of G. sacculifer show century-scale variability throughout most of the Holocene. The GOM record is consistent with records from other areas, suggesting that century-scale variability is a pervasive feature of Holocene climate. The frequency of several cycles in the climate records is similar to cycles identified in proxy records of solar variability, indicating that at least some of the century-scale climate variability during the Holocene is due to external (solar) forcing.
Temporal Coverage 1968-01-20T00:00:00
Spatial Coverage Latitude: 24.810000;Longitude: -93.725000
Description Note: 45 data points
Part of series Supplement to: Poore, RZ et al. (2003): Millennial- to century-scale variability in Gulf of Mexico Holocene climate records. Paleoceanography, 18(2), 1048, https://doi.org/10.1029/2002PA000868
Educational Use Research
Learning Resource Type Data Set
Publisher Date 2003-01-14
Rights License https://creativecommons.org/licenses/by/3.0/


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