noaa-ocean-2632
Benguela Upwelling Region Holocene and Deglacial Mg/Ca Data
Farmer, E.C.; deMenocal, P.B.; Marchitto, T.M.
Benguela Upwelling Region Holocene and Deglacial Mg/Ca Data
2005-07-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/2632
Investigator
E.C.
Farmer
Investigator
P.B.
deMenocal
Investigator
T.M.
Marchitto
earth science
paleoclimate
paleoceanography
weight,Neogloboquadrina pachyderma dextral,null,dimensionless,null,paleoceanography,normalized,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
Neogloboquadrina pachyderma sinistral,sediment,null,percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
magnesium/calcium,Globigerina bulloides,null,dimensionless,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
trace metals in carbonates
earth science
paleoclimate
paleocean
reconstruction
earth science
paleoclimate
paleocean
population abundance
earth science
paleoclimate
paleocean
age control
geoscientificInformation
17824 14C yr BP
0 14C yr BP
21082 cal yr BP
0 cal yr BP
Complete
-25.52
-25.52
13.03
13.03
-1992
-1992
Ocean
Atlantic Ocean
South Atlantic Ocean
ODP1084B>LATITUDE -25.52>LONGITUDE 13.03
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Farmer, E.C., P.B. deMenocal, and T.M. Marchitto. 2005. Holocene and deglacial ocean temperature variability in the Benguela upwelling region: Implications for low-latitude atmospheric circulation. Paleoceanography 20, PA2018.
Mg/Ca analyses of G. bulloides and abundances of N. pachyderma (left coiling) from Ocean Drilling Program (ODP) Leg 175 Hole 1084B in the Benguela coastal upwelling system document lower sea surface temperatures during the Last Glacial Maximum (LGM), Younger Dryas, mid-Holocene, and Little Ice Age in the southeastern Atlantic. Taking into consideration the possible effects of differential carbonate dissolution, the Mg/Ca data indicate Younger Dryas temperatures 2°-3°C cooler than those of the early Holocene and LGM temperatures 4°-5°C cooler than those of the early Holocene. The cool interval during the deglacial period at Hole 1084B matches the timing of Younger Dryas shifts in Cariaco Basin and Greenland Ice Sheet records and that of a nearby alkenone record. Comparison of mid-Holocene cooling at Hole ODP1084B with other high-resolution records of Holocene and last deglacial sea surface temperatures from the tropical Atlantic implies consistent basin-wide changes in atmospheric circulation. A brief period of 1.5°-2°C cooling between 17.8 and 17.2 ka, if related to Heinrich event 1, is consistent with a previously hypothesized tropical origin of all Heinrich climate change events.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1084b-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/farmer2005
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11