noaa-lake-13216
Lake Malawi 700 Year TEX86 Surface Water Temperature Reconstruction
Powers, L.A.; Johnson, T.C.; Werne, J.P.; Castañeda, I.S.; Hopmans, E.C.; Sinninghe Damsté, J.S.; Schouten, S.
Lake Malawi 700 Year TEX86 Surface Water Temperature Reconstruction
2012-08-23
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13216
Investigator
L.A.
Powers
Investigator
T.C.
Johnson
Investigator
J.P.
Werne
Investigator
I.S.
Castañeda
Investigator
E.C.
Hopmans
Investigator
J.S.
Sinninghe Damsté
Investigator
S.
Schouten
earth science
paleoclimate
paleolimnology
tetraether index of 86 carbon atoms,sediment,null,dimensionless,null,paleolimnology,null,null,N,replicate 1
earth science
paleoclimate
paleolimnology
tetraether index of 86 carbon atoms,sediment,null,dimensionless,null,paleolimnology,null,null,N,replicate 2
earth science
paleoclimate
paleolimnology
tetraether index of 86 carbon atoms,sediment,null,dimensionless,null,paleolimnology,null,null,N,replicate 4
earth science
paleoclimate
climate reconstructions|paleolimnology
lake surface temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,TEX86
earth science
paleoclimate
climate reconstructions|paleolimnology
age,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
tetraether index of 86 carbon atoms,sediment,null,dimensionless,null,paleolimnology,averaged,null,N,null
earth science
paleoclimate
paleolimnology
tetraether index of 86 carbon atoms,sediment,one standard deviation,dimensionless,null,paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleolimnology
depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
tetraether index of 86 carbon atoms,sediment,null,dimensionless,null,paleolimnology,null,null,N,replicate 3
earth science
paleoclimate
paleolimnology
reconstruction
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
Other Hydroclimate Reconstruction
PAGES 2k Network
PAGES Africa 2k
1283 AD
1996 AD
667 cal yr BP
-46 cal yr BP
Complete
-10.00333
-9.97667
34.23
34.28833
Continent
Africa
Eastern Africa
Malawi
Lake Malawi, core M98-2P>LATITUDE -9.97667>LONGITUDE 34.23
Continent
Africa
Eastern Africa
Malawi
Lake Malawi, core M98-11C>LATITUDE -10.00333>LONGITUDE 34.28833
None
Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
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
Powers, L.A., T. C. Johnson, J.P. Werne, I.S. Castañeda,
E.C. Hopmans, J.S. Sinninghe Damsté, and S. Schouten. 2011.
Organic geochemical records of environmental variability
in Lake Malawi during the last 700 years, Part I:
The TEX86 temperature record.
Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 303,
pp. 133-139. doi:10.1016/j.palaeo.2010.09.006
We have applied the TEX86 paleothermometer to produce a surface
water temperature record for Lake Malawi spanning the past 700 years.
Over much of the record temperature fluctuates from ~24-27°C with
a mean of ~25°C; however, there has been a substantial increase
in temperature of ~2.0°C during the past ~ 100 years. The TEX86
temperature record reveals a strong similarity to the instrumental
record; both records demonstrate warming (~0.7-1.4°C) over the past
~50 years as well as a cooling anomaly around 1959. Comparison of
the TEX86 temperature record with the proxy records of primary
productivity suggests that wind induced upwelling and/or precipitation
have a strong influence on the surface temperature of Lake Malawi.
STUDY NOTES: Surface water 700 year temperature reconstruction for Lake Malawi,
East Africa, produced using the TEX86 paleothermometer. Three cores
collected during the 1998 International Decade for East African Lakes
(IDEAL) expedition in the north basin of Lake Malawi were used
in this study. Splicing data from multi-cores M98-11MCA and M98-11MCB,
and gravity trigger core M98-2PG, results in a record spanning
the past ~700 years. Sediment samples (~1-2 g dry weight) were
collected from the cores and analyzed for TEX86 as described
in Powers et al. (2005). We have applied the mean annual lake
surface temperature (ALST) calibration equation, ALST=55.0*TEX86-14.0
Lake Malawi core M98-11MCA/B: 10°00.2'S, 34°17.3'E, water depth 404m.
Lake Malawi core M98-2PG: 9°58.6'S, 34°13.8'E, water depth 363m.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi2011.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi2011.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11