noaa-ocean-13280
Gulf of California Deglacial Biogenic SST Reconstructions
McClymont, E.L.; Ganeshram, R.S.; Pichevin, L.; Talbot, H.M.; van Dongen, B.E.; Thunell, R.C.; Haywood, A.M.; Singarayer, J.S.; Valdes, P.J.
Gulf of California Deglacial Biogenic SST Reconstructions
2012-08-13
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13280
Investigator
E.L.
McClymont
Investigator
R.S.
Ganeshram
Investigator
L.
Pichevin
Investigator
H.M.
Talbot
Investigator
B.E.
van Dongen
Investigator
R.C.
Thunell
Investigator
A.M.
Haywood
Investigator
J.S.
Singarayer
Investigator
P.J.
Valdes
earth science
paleoclimate
paleoceanography
biogenic silica,sediment,null,percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,based on TEX86
earth science
paleoclimate
paleoceanography
tetraether index of 86 carbon atoms,null,null,dimensionless,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
climate reconstructions|paleoceanography
sea surface temperature,alkenone unsaturation index|glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleoceanography,differenced,null,N,UK37 - TEX86
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
branched and isoprenoid tetraether index,null,null,dimensionless,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
branched glycerol dialkyl glycerol tetraether,null,null,milligram per gram,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
geochemistry
earth science
paleoclimate
paleocean
biomarkers
earth science
paleoclimate
paleocean
reconstruction
geoscientificInformation
Sea Surface Temperature Reconstruction
24988 cal yr BP
6825 cal yr BP
Complete
27.4835
27.4835
-112.0743
-112.0743
-881
-881
Ocean
Atlantic Ocean
North Atlantic Ocean
Gulf Of Mexico
MD02-2515>LATITUDE 27.4835>LONGITUDE -112.0743
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
McClymont, E.L., R.S. Ganeshram, L.E. Pichevin, H.M. Talbot,
B.E. van Dongen, R.C. Thunell, A.M. Haywood, J.S. Singarayer,
and P.J. Valdes. 2012.
Sea-surface temperature records of Termination 1 in the Gulf
of California: Challenges for seasonal and interannual analogues
of tropical Pacific climate change.
Paleoceanography, 27, PA2202, doi:10.1029/2011PA002226
Centennial-scale records of sea-surface temperature and opal
composition spanning the Last Glacial Maximum and Termination 1
(circa 25-6 ka) are presented here from Guaymas Basin in the
Gulf of California. Through the application of two organic
geochemistry proxies, the UK37'index and the TEX86H index,
we present evidence for rapid, stepped changes in temperatures
during deglaciation. These occur in both temperature proxies
at 13 ka (~3°C increase in 270 years), 10.0 ka (~2°C decrease
over ~250 years) and at 8.2 ka (3°C increase in <200 years).
An additional rapid warming step is also observed in TEX86H
at 11.5 ka. In comparing the two temperature proxies and opal
content, we consider the potential for upwelling intensity
to be recorded and link this millennial-scale variability
to shifting Intertropical Convergence Zone position
and variations in the strength of the Subtropical High.
The onset of the deglacial warming from 17 to 18 ka is
comparable to a "southern hemisphere" signal, although
the opal record mimics the ice-rafting events of the north
Atlantic (Heinrich events). Neither the modern seasonal cycle
nor El Niño/Southern Oscillation patterns provide valid
analogues for the trends we observe in comparison with other
regional records. Fully coupled climate model simulations
confirm this result, and in combination we question whether
the seasonal or interannual climate variations of the modern
climate are valid analogues for the glacial and deglacial
tropical Pacific.
STUDY NOTES: Sea surface temperature (SST) reconstructions for the Gulf
of California (GOC) based on two organic geochemical proxies,
the UK37'index and the TEX86H index. Data cover the deglacial
interval from roughly 25 - 6 ka.
Giant Calypso core MD02-2515 was collected from Guaymas Basin
in the central GOC during the 2002 IMAGES-MONA expedition
Core MD02-2515: 27°29.01'N, 112°04.46'W, 881 m water depth.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcclymont2012/mcclymont2012.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcclymont2012/mcclymont2012.txt
USA/NOAA
DIF
Version 9.8.4
2019-04-22
2019-04-22