noaa-recon-12821
Arid Central Asia 1000 Year Synthesized Moisture Reconstruction
Chen, F.-H.; Chen, J.-H.; Holmes, J.A.; Boomer, I.; Austin, P.; Gates, J.B.; Wang, N.-L.; Brooks, S.J.; Zhang, J.-W.
Arid Central Asia 1000 Year Synthesized Moisture Reconstruction
2012-03-08
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12821
Investigator
F.-H.
Chen
Investigator
J.-H.
Chen
Investigator
J.A.
Holmes
Investigator
I.
Boomer
Investigator
P.
Austin
Investigator
J.B.
Gates
Investigator
N.-L.
Wang
Investigator
S.J.
Brooks
Investigator
J.-W.
Zhang
earth science
paleoclimate
climate reconstructions
precipitation minus evaporation,null,null,standard deviation unit,null,climate reconstructions,anomalized|interpolated,compositing method,N,"anomalized over length of record, resampled for uniform temporal spacing"
earth science
paleoclimate
climate reconstructions
age,null,null,year Common Era,null,climate reconstructions,null,null,N,null
earth science
paleoclimate
reconstructions
ground water
geoscientificInformation
Other Hydroclimate Reconstruction
westerlies
1000 AD
2000 AD
950 cal yr BP
-50 cal yr BP
Complete
34.3
46.6
50.9
102.3
Continent
Asia
Southcentral Asia
Arid central Asia>LATITUDE >LONGITUDE
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
Chen, F.-H., J.-H. Chen, J. Holmes, I. Boomer, P. Austin,
J.B. Gates, N.-L. Wang, S.J. Brooks, and J.-W. Zhang. 2010.
Moisture changes over the last millennium in arid central Asia:
a review, synthesis and comparison with monsoon region.
Quaternary Science Reviews, Vol. 29, Issues 7–8, pp. 1055–1068,
April 2010. http://dx.doi.org/10.1016/j.quascirev.2010.01.005
There is a strong chance that 20th century warming will cause
differences in precipitation distribution, hydrological cycle
and effective moisture changes over the globe. Arid central
Asia (ACA), a unique dryland area whose atmospheric circulation
is dominated today by the westerlies, is one of the specific
regions that are likely to be strongly impacted by global warming.
An understanding of past variations in effective moisture in such
regions is an important prerequisite for the prediction of future
hydrological change. Here we evaluate spatial and temporal patterns
of effective moisture variations documented by different proxies
from 17 records in ACA, and synthesize a decadal-resolution
moisture curve for ACA over the past millennium, using 5 of the 17
records selected on the basis of reliable chronologies and robust
proxies. The high- and low-resolution data all show that, over
the past millennium, ACA has been characterized by a relatively
dry Medieval Warm Period (MWP; the period from w1000 to 1350 AD),
a wet Little Ice Age (LIA; from w1500 to 1850 AD) and increasing
moisture during recent decades. As a whole, the LIA in the ACA
was not only relatively humid but also had high precipitation.
Over the past millennium, the multi-centennial moisture changes
in ACA show a generally inverse relationship with the temperature
changes in the Northern Hemisphere, China, and western central Asia.
The effective moisture history in ACA also shows an out-of-phase
relationship with that in monsoon Asia (especially during the LIA).
We propose that the humid LIA in ACA, possibly extending to
Mediterranean Sea and Western Europe, may have resulted from
increased precipitation due to more frequent mid-latitude cyclone
activities as a result of the strengthening and equator-ward shift
of the westerly jet stream, and the predominantly negative
North Atlantic Oscillation conditions, coupled with a decrease
in evapotranspiration caused by the cooling at that time.
STUDY NOTES: Synthesized moisture data (decadal resolution) for Arid Central Asia
(ACA) over the last millennium. The synthesized data were derived
from 5 well-dated, high-resolution paleo-moisture records located
across the ACA, by arithmetically averaging of interpolated
(to a uniform 10a resolution) and standardized (to have zero mean
and unit standard deviation) original data. Chronology was established
in original publications on each of the 5 proxy records, except in
the case of Aral Sea.
Arid central Asia: 34°19'48" - 46°31'48"N, 50°57'- 102°22'12"E
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/chen2010/chen2010.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/chen2010/chen2010.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11