Late Holocene Chesapeake Bay Mg/Ca Data and Spring Temperature Reconstruction
Entry ID: NOAA_NCDC_PALEO2003-042

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Summary
Abstract: Late Holocene (2200-present) spring water temperatures from Chesapeake
Bay in the eastern United States determined from magnesium/calcium
(Mg/Ca) ratios in the ostracode Loxoconcha. The file provides a
composite temperature curve constructed from 3 sediment core Mg/Ca
records. Details on chronology, methodology, and implications for
late Holocene climate variability can be found in the original
reference.

Abstract (from the online documentation)
We present paleoclimate evidence for rapid (< 100) shifts of of ~2-4C
in Chesapeake Bay (CB) temperature ~2100, 1600, 950, 650, 400 and 150
years before present (years BP) reconstructed from magnesium/calcium
(Mg/Ca) paleothermometry. These include large temperature excursions
during the Little Ice Age (~1400-1900 AD) and the Medieval Warm Period
(~800-1300 AD) possibly related to changes in the strength of North
Atlantic thermohaline circulation (THC). Evidence is presented for a
long period of sustained regional and North Atlantic-wide warmth with
low-amplitude temperature variability between ~450 and 1000 AD. In
addition to centennial-scale temperature shifts, the existence of
numerous temperature maxima between 2200 and 250 years BP (average ~70
years) suggests that multi-decadal processes typical of the North
Atlantic Oscillation (NAO) are an inherent feature of late Holocene
climate. However, late 19th and 20th century temperature extremes in
Chesapeake Bay associated with NAO climate variability exceeded those
of the prior 2000 years, including the interval 450-1000 AD by 2-3C,
suggesting anomalous recent behavior of the climate system.

Related URL
Link: GET DATA
Description: Access to data and documentation


Geographic Coverage
 N: 40.0 S: 36.0  E: -74.0  W: -78.0

Data Set Citation
Dataset Originator/Creator: Cronin, T., et al., 2003
Dataset Title: Late Holocene Chesapeake Bay Mg/Ca Data and Spring Temperature Reconstruction
Dataset Series Name: IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2003-042
Dataset Release Date: June 2003
Dataset Release Place: Boulder, CO
Dataset Publisher: NOAA/NCDC Paleoclimatology Program, Boulder CO, USA.
Online Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/cro...


Paleo_Temporal_Coverage
Paleo Start Date: 2200 ybp
Paleo Stop Date: 0 ybp
Chrono Unit:


Location Keywords
OCEAN > ATLANTIC OCEAN
OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > Chesapeake Bay


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >MAXIMUM/MINIMUM TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >TEMPERATURE ANOMALIES    [Definition]
OCEANS >OCEAN CIRCULATION >THERMOHALINE CIRCULATION    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MICROFOSSILS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >RADIOCARBON    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >SEDIMENTS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >STRATIGRAPHIC SEQUENCE    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >NORTH ATLANTIC OSCILLATION    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >OCEAN SALINITY RECONSTRUCTION    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >SEA SURFACE TEMPERATURE RECONSTRUCTION    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >ATMOSPHERIC CIRCULATION RECONSTRUCTION    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
OCEANS


Project
PAGES >Past Global Changes, IGBP    [Information]


Keywords
temperature reconstruction
Chesapeake Bay
Mg/Ca Data
ostracode
Loxoconcha
paleothermometry
paleotemperatures
Medieval Warm Period
Little Ice Age
North Atlantic Oscillation
NAO
late Holocene climate
climate change
rapid climate change
temperature anomalies
pollen stratigraphy


Originating Center


Data Center
World Data Center for Paleoclimatology, Boulder    [Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/

Data Center Personnel
Name: WDC/PALEOCLIMATOLOGY, BOULDER
Phone: +1 (303) 497-6160
Fax: +1 (303) 497-6513
Email: paleo at noaa.gov
Contact Address:
World Data Center for Paleoclimatology
NOAA/NCDC Code E/GCx3
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA


Personnel
THOMAS MARK CRONIN
Role: INVESTIGATOR
Phone: 703-648-6363
Fax: 703-648-6032
Email: tcronin at usgs.gov
Contact Address:
U.S. Geological Survey
12201 Sunrise Valley Drive
City: Reston
Province or State: VA
Postal Code: 20192
Country: USA


G. S. DWYER
Role: INVESTIGATOR


T. KAMIYA
Role: INVESTIGATOR


S. SCHWEDE
Role: INVESTIGATOR


DEBRA A. WILLARD
Role: INVESTIGATOR
Phone: (703) 648-5320
Fax: (703) 648-6953
Email: dwillard at geochange.er.usgs.gov
Email: dwillard at mailrvag2.er.usgs.gov
Contact Address:
MS 926A National Center
U.S. Geological Survey
City: Reston
Province or State: VA
Postal Code: 20192
Country: USA


Publications/References
Cronin, T. M., G. S. Dwyer, T. Kamiya, S. Schwede, and D. A. Willard,
2003. Medieval Warm Period, Little Ice Age and 20th Century
Temperature Variability from Chesapeake Bay. Global and Planetary
Change, v. 36, p. 17-29.

Creation and Review Dates
DIF Creation Date: 2004-03-15
Last DIF Revision Date: 2005-04-19

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