noaa-lake-13215
Lower Bear Lake, California 9170 Year Multiproxy Sediment Data
Kirby, M.E.; Zimmerman, S.R.H.; Patterson, W.P.; Rivera, J.J.
Lower Bear Lake, California 9170 Year Multiproxy Sediment Data
2012-08-09
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13215
Investigator
M.E.
Kirby
Investigator
S.R.H.
Zimmerman
Investigator
W.P.
Patterson
Investigator
J.J.
Rivera
earth science
paleoclimate
paleolimnology
total gastropods,null,null,count per gram,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
depth,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
carbonate,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,950 degrees C
earth science
paleoclimate
paleolimnology
total ostracods,null,null,count per gram,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,total organic carbon/total nitrogen
earth science
paleoclimate
paleolimnology
age,null,null,calendar year before present,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
mass magnetic susceptibility,sediment,null,cubic meter per kilogram,null,paleolimnology,null,magnetic susceptibility measurement with single sample sensor,N,x10-7 units
earth science
paleoclimate
paleolimnology
organic matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,550 degrees C
earth science
paleoclimate
paleolimnology
magnetic susceptibility
earth science
paleoclimate
paleolimnology
population abundance
earth science
paleoclimate
paleolimnology
physical properties
geoscientificInformation
hydrology
9355 cal yr BP
475 cal yr BP
Complete
34.254
34.254
-116.914
-116.914
2059
2059
Continent
North America
United States Of America
California
Lower Bear Lake>LATITUDE 34.254>LONGITUDE -116.914
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
Kirby, M.E., S.R.H. Zimmerman, W.P. Patterson, and J.J. Rivera. 2012.
A 9170-year record of decadal-to-multi-centennial scale pluvial episodes
from the coastal Southwest United States: a role for atmospheric rivers?
Quaternary Science Reviews, Vol. 46, 16 July 2012, pp. 57-65
doi:10.1016/j.quascirev.2012.05.008
A well-dated, 9170 calendar year before present (cal yr BP)
paleohydrologic reconstruction is presented from Lower Bear Lake
in the San Bernardino Mountains of the coastal southwest United
States. This new multi-proxy record is characterized by alternating
organic-rich/carbonate-rich sediment units, interpreted to reflect
hydrologically-forced changes in the lake's depositional environment.
Our interpretation of the proxy data indicates nine decadal-to-multi-
centennial pluvial episodes (PE) over the past 9170 cal yr BP.
Of these nine inferred pluvials, five are interpreted as more
pronounced based on their combined proxy interpretations:
(PE-V) 9170?-8250, (PE-IV) 7000-6400, (PE-III) 3350-3000,
(PE-II) 850-700, and (PE-I) 500-476 (top of core) cal yr BP.
The Lower Bear Lake record indicates that the San Bernardino Mountains,
source region for the Mojave River and its terminal playa, was wet
during the same periods (within dating errors), to several of the major
pluvials proposed from the lakes in the sink of the Mojave River.
Our comparison extends north also to Tulare Lake, which drains the
south-central western Sierra Nevada Mountains. This temporally
and spatially coherent signal indicates that a similar climate forcing
acted to increase regional wetness at various times during the past
9170 cal yr BP. As originally proposed by Enzel, Ely, and colleagues
(e.g., Enzel et al., 1989; Enzel, 1992; Ely et al., 1994;
Enzel and Wells, 1997), we too contend that Holocene pluvial episodes
are associated with changing the frequency of large winter storms
that track across a broad region at decadal-to-multicentennial
timescales. We build upon their hypothesis through the addition
of new and better-dated site comparisons, recent advances in the
understanding of atmospheric rivers, and improved knowledge of
the ocean-atmosphere dynamics that caused the early 20th century
western United States pluvial.
STUDY NOTES: Multiproxy lake sediment data from Lower Bear Lake, California
covering the last 9170 years. Parameters measured include
magnetic susceptibility, LOI 550C, LOI 950C, ostracod counts,
gastropod counts, and molar CN ratios.
Lower Bear Lake was a small lake within Big Bear Valley prior
to construction of Big Bear Dam in 1884 AD. Modern bathymetry
reveals a distinct depression in the near-center of modern
Big Bear Reservoir, representing the original Lower Bear Lake.
A single drive, 4.5 m-long sediment core (BBLVC05-1) was
extracted from Lower Bear Lake in 2005. The core was split,
described, digitally photographed, and sub-sampled in the CSUF
Paleoclimatology and Paleotsunami Laboratory. Mass magnetic
susceptibility, LOI 550C (% total organic matter), and LOI 950C
(% total carbonate) were determined at 1 cm contiguous intervals.
Lower Bear Lake, California USA: 34.254°N, 116.914°W, 2059m elev
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/lowerbear2012.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/lowerbear2012.txt
USA/NOAA
DIF
Version 9.8.4
2019-06-03
2019-06-03