noaa-loess-12970
Lingtai Loess 7Ma Magnetic Susceptibility, Grain Size, and Carbonate Data
Sun, Y.; An, Z.; Clemens, S.C.; Bloemendal, J.; Vandenberghe, J.
Lingtai Loess 7Ma Magnetic Susceptibility, Grain Size, and Carbonate Data
2012-05-30
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12970
Investigator
Y.
Sun
Investigator
Z.
An
Investigator
S.C.
Clemens
Investigator
J.
Bloemendal
Investigator
J.
Vandenberghe
earth science
paleoclimate
loess
grain size mean,loess,null,micrometer,null,loess,null,null,N,null
earth science
paleoclimate
loess
grain size mean,loess,null,dimensionless,null,loess,normalized,null,N,null
earth science
paleoclimate
loess
proxy composite,loess,null,null,null,loess,composited,null,N,normalized and averaged magnetic susceptibility and carbonate data
earth science
paleoclimate
loess
age,null,null,null,null,loess,null,null,N,null
earth science
paleoclimate
loess
calcium carbonate,loess,null,weight percent,null,loess,smoothed,null,N,3 points smoothing
earth science
paleoclimate
loess
depth,null,null,meter,null,loess,corrected,null,N,null
earth science
paleoclimate
loess
magnetic susceptibility,loess,null,unspecified unit,null,loess,smoothed,null,N,3 points smoothing
earth science
paleoclimate
loess
calcium carbonate,loess,null,dimensionless,null,loess,normalized|smoothed,null,N,3 points smoothing
earth science
paleoclimate
loess
magnetic susceptibility,loess,null,unspecified unit,null,loess,normalized|smoothed,null,N,3 points smoothing
earth science
paleoclimate
loess
geoscientificInformation
Monsoon
6935000 cal yr BP
0 cal yr BP
Complete
35.0667
35.0667
107.65
107.65
1350
1350
Continent
Asia
Eastern Asia
China
Lingtai>LATITUDE 35.0667>LONGITUDE 107.65
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
Sun, Y.B., Z.S. An, S.C. Clemens, J. Bloemendal,
and J. Vandenberghe. 2010.
Seven million years of wind and precipitation variability
on the Chinese Loess Plateau.
Earth and Planetary Science Letters, Vol. 297, pp.525-535.
doi:10.1016/j.epsl.2010.07.004
Recent studies of the eolian deposits in northern China have extended
the East Asian monsoon history back to the early Miocene. However,
the relative intensities of monsoonal winds and precipitation and
the extent of their coupling prior to the Pleistocene epoch remain
poorly constrained, mainly due to uncertainties in the interpretation
of proxy indices generated from the Mio-Pliocene Red Clay sequences.
Here we reconstruct East Asian monsoon oscillations over the past
7 Ma using magnetic susceptibility and carbonate content as summer
monsoon (precipitation) proxies, and quartz grain size as a winter
monsoon (wind intensity) index. Our results suggest that
precipitation and wind intensity exhibited significant orbital-scale
variations prior to 4.2 Ma, followed by slightly damped variability
between 4.2 and 2.75 Ma. Subsequently, East Asian monsoon circulation
experienced two large shifts at about 2.75 and 1.25 Ma, characterized
by stepwise strengthening of glacial wind and interglacial
precipitation. A remarkable change in East Asian monsoon seasonality
occurred around 3.15-2.75 Ma. Prior to 3.15 Ma, strong winds were
positively correlated with high effective precipitation, whereas
after 2.75 Ma strong winds were negatively correlated with heavy
precipitation. This shift was probably induced by a change from
an insolation-forced system to one strongly influenced by the
combined effects of the phased uplift of the Himalaya-Tibetan
Plateau and the simultaneous development of the Northern Hemisphere
ice sheets.
STUDY NOTES: Magnetic susceptibility, grain size, and carbonate data for the past
7 million years from the loess-paleosol and Red Clay sequence located
at Lingtai on the southern Chinese Loess Plateau. The Quaternary
loess-palaeosol sequence (168 m) is underlain by the 120-m-thick
late Neogene Red Clay formation.
Samples were taken at 8 cm intervals for the loess-palaeosol sequences
and 4 cm intervals for the Red Clay formation. A total of 5100 samples
were collected for proxy analyses.
Magnetic susceptibility was measured using a Bartington MS2 meter
at the Institute of Earth Environment, Chinese Academy of Sciences.
Carbonate content was determined by a volumetric method, with an error
of less than 3%. Particle-size distributions of bulk and quartz samples
were determined using a Malvern Mastersize S laser-diffraction analyzer
at the Institute of Earth Environment, Chinese Academy of Sciences.
Lingtai, Chinese Loess Plateau: 35°04'N, 107°39'E, 1350 m elev.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/sun2010lingtai.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/sun2010lingtai.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11