noaa-lake-14388
Lake Ximencuo, Tibet 1000 Year Multiproxy Sediment Data
Pu, Y.; Nace, T.; Meyers, P.A.; Zhang, H.; Wang, Y.; Zhang, C.L.; Shao, X.M.
Lake Ximencuo, Tibet 1000 Year Multiproxy Sediment Data
2013-05-12
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/14388
Investigator
Y.
Pu
Investigator
T.
Nace
Investigator
P.A.
Meyers
Investigator
H.
Zhang
Investigator
Y.
Wang
Investigator
C.L.
Zhang
Investigator
X.M.
Shao
earth science
paleoclimate
paleolimnology
average chain length,n-alkane,null,count,null,paleolimnology,null,gas chromatography|isotope ratio mass spectrometry,N,average chain length of C27-33 n-alkanes
earth science
paleoclimate
paleolimnology
depth at sample start,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
carbon preference index,null,null,dimensionless,null,paleolimnology,null,gas chromatography|isotope ratio mass spectrometry,N,C21-33 n-alkanes
earth science
paleoclimate
paleolimnology
depth,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
nitrogen,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,organic carbon/total nitrogen
earth science
paleoclimate
paleolimnology
depth at sample end,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
age,null,null,year Common Era,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
carbon preference index,null,null,dimensionless,null,paleolimnology,null,gas chromatography|isotope ratio mass spectrometry,N,C22-38 n-alkan-ols
earth science
paleoclimate
paleolimnology
average chain length,n-alkanol,null,count,null,paleolimnology,null,gas chromatography|isotope ratio mass spectrometry,N,average chain length of C22-38 n-alkan-ols
earth science
paleoclimate
paleolimnology
delta 13C,organic matter,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
delta 13C,organic matter,null,per mil PDB,null,paleolimnology,corrected,isotope ratio mass spectrometry,N,corrected for the Suess effect
earth science
paleoclimate
paleolimnology
organic carbon,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
delta 15N,sediment,null,per mil AIR,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
carbon isotopes
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
Monsoon
hydrology
temperature
1005 AD
2004 AD
945 cal yr BP
-54 cal yr BP
Complete
33.378
33.378
101.106
101.106
4020
4020
Continent
Asia
Eastern Asia
China
Lake Ximencuo>LATITUDE 33.378>LONGITUDE 101.106
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
Yang Pu, Trevor Nace, Philip A. Meyers, Hucai Zhang, Yongli Wang, Chuanlun L. Zhang, Xiaohua Shao. 2013.
Paleoclimate changes of the last 1000 yr on the eastern Qinghai-Tibetan Plateau recorded by elemental, isotopic, and molecular organic matter proxies in sediment from glacial Lake Ximencuo.
Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 379-380, pp. 39-53. DOI: 10.1016/j.palaeo.2013.03.023
Total organic carbon (Corg) and nitrogen (Ntot) concentrations and isotope compositions and n-alkane and n-alkan-ol molecular biomarker compositions were measured in two parallel sediment cores from Lake Ximencuo, a typical glacial lake on the eastern Qinghai-Tibetan Plateau (QTP), to reconstruct local climatic variations during the past 1000 yr. Concentrations of Corg and Ntot vary similarly with changes in precipitation recorded by tree rings in Dulan, northeastern QTP, indicating their close relation to precipitation. Carbon Preference Index (CPI) values of C22-C33n-alkanes and C22-C28n-alkan-1-ols and Average Chain Length (ACL) values of C27-C33n-alkanes generally negatively correlate with d13Corg and d15Ntot and also vary comparably with the oxygen isotope temperature record from the Dunde ice core, northeastern QTP. These patterns indicate that high CPI values and negative shifts of the d13Corg and d15Ntot correspond to warmer conditions that favor the growth of vascular land plants and that lower values and positive shifts correspond to cooler conditions in the Lake Ximencuo locality. This observation contradicts previous interpretations from peat and modern soil studies that conclude that the CPI indices were controlled by microbial degradation under different climate conditions. Here we propose that the changes of organic matter sources under different climate regimes, combined with physiological adjustments of vascular plants to different air temperatures, might yield different CPI responses to climate changes in glacial plateau lakes. Air temperature and precipitation increases and decreases reconstructed in this 1000-yr study were generally independent of each other, but they both occurred at centennial or multi-centennial scales. The interaction between subtropical (Asian Monsoon) and mid-latitude (Westerly) atmospheric circulation systems probably dominated the local precipitation variations in the Lake Ximencuo catchment, whereas solar insolation, volcanism and greenhouse gas variations were likely responsible for the air temperature changes that are recorded in the lake sediments and that are consistent with regional temperature variations in the eastern QTP.
STUDY NOTES: Total organic carbon (Corg) and nitrogen (Ntot) concentrations and isotope
compositions and n-alkane and n-alkan-ol molecular biomarker compositions
were measured in two parallel sediment cores from Lake Ximencuo, a typical
glacial lake on the eastern Qinghai-Tibetan Plateau (QTP), to reconstruct
local climatic variations during the past 1000 yr.
XimenCuo core XMC-5 data are plotted in Fig.3 and Fig.9
XimenCuo core XMC-6 data are plotted in Fig.7 and Fig.9
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/ximencuo2013xmc6.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/ximencuo2013xmc5.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11