noaa-lake-12336
Lynch's Crater 45,000 Year Optical Absorption Data
Turney, C.S.M.; Kershaw, A.P.; Clemens, S.C.; Branch, N.; Moss, P.T.; Fifield, L.K.
Lynch's Crater 45,000 Year Optical Absorption Data
2011-12-14
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12336
Investigator
C.S.M.
Turney
Investigator
A.P.
Kershaw
Investigator
S.C.
Clemens
Investigator
N.
Branch
Investigator
P.T.
Moss
Investigator
L.K.
Fifield
earth science
paleoclimate
paleolimnology
absorbance,peat,null,percent,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
depth,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
physical properties
geoscientificInformation
hydrology
45000 cal yr BP
0 cal yr BP
Complete
-17.3667
-17.3667
145.7
145.7
Continent
Australia/New Zealand
Australia
Queensland
Lynch's Crater>LATITUDE -17.3667>LONGITUDE 145.7
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
Turney, C.S.M., A.P. Kershaw, S.C. Clemens, N. Branch,
P.T. Moss, and L.K. Fifield. 2004.
Millennial and orbital variations of El Niño/Southern Oscillation
and high-latitude climate in the last glacial period.
Nature, Vol. 428, No. 6980, pp. 306-309, 18 March 2004.
doi:10.1038/nature02386
The El Niño/Southern Oscillation (ENSO) phenomenon is believed
to have operated continuously over the last glacial-interglacial
cycle. ENSO variability has been suggested to be linked to
millennial-scale oscillations in North Atlantic climate during
that time, but the proposals disagree on whether increased
frequency of El Niño events, the warm phase of ENSO, was linked
to North Atlantic warm or cold periods. Here we present a
high-resolution record of surface moisture, based on the degree
of peat humification and the ratio of sedges to grass, from
northern Queensland, Australia, covering the past 45,000 yr.
We observe millennial-scale dry periods, indicating periods
of frequent El Niño events (summer precipitation declines
in El Niño years in northeastern Australia). We find that
these dry periods are correlated to the Dansgaard-Oeschger
events - millennial-scale warm events in the North Atlantic
climate record - although no direct atmospheric connection
from the North Atlantic to our site can be invoked.
Additionally, we find climatic cycles at a semiprecessional
timescale (~11,900 yr). We suggest that climate variations
in the tropical Pacific Ocean on millennial as well as orbital
timescales, which determined precipitation in northeastern
Australia, also exerted an influence on North Atlantic climate
through atmospheric and oceanic teleconnections.
STUDY NOTES: Optical absorption data from Lynch's Crater, Queensland,
Australia, as a proxy for peat decomposition (humification)
and surface wetness at the time of peat deposition.
High values of absorption are interpreted as reflecting
dry surface conditions, because increased microbial activity
under aerobic conditions increases the degree of peat
humification. The chronology for the sequence is provided
by 15 radiocarbon ages over the 45,000 year record.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/lynchs2004.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/lynchs2004.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11