2,000-Year Northern Hemisphere Temperature Reconstruction
Entry ID: NOAA_NCDC_PALEO_2005-019

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Summary
Abstract: A number of reconstructions of millennial-scale climate variability have been
carried out in order to understand patterns of natural climate variability, on
decade to century timescales, and the role of anthropogenic forcing. These
reconstructions have mainly used tree-ring data and other data sets of annual
to decadal resolution. Lake and ocean sediments have a lower time resolution,
but provide climate information at multicentennial timescales that may not be
captured by tree-ring data. Here we reconstruct Northern Hemisphere
temperatures for the past 2,000 years by combining low-resolution proxies with
tree-ring data, using a wavelet transform technique to achieve
timescale-dependent processing of the data. Our reconstruction shows larger
multicentennial variability than most previous multi-proxy reconstructions, but
agrees well with temperatures reconstructed from borehole measurements and with
temperatures obtained with a general circulation model. According to our
reconstruction, high temperatures - similar to those observed in the twentieth
century before 1990- occurred around AD 1000 to 1100, and minimum temperatures
that are about 0.7K below the average of 1961-90 occurred around AD 1600. This
large natural variability in the past suggests an important role of natural
multicentennial variability that is likely to continue.

This data set consists of reconstructed Northern Hemisphere temperatures for
the past 2,000 years calculated by combining low-resolution proxies with
tree-ring data, using a wavelet transform technique to achieve
timescale-dependent processing of the data.

All data are given as temperature anomalies (K) from the Northern Hemisphere
annual mean temperature 1961-90 average. Lack of data are indicated with
-9.9999

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


Link: VIEW RELATED INFORMATION
Description: Documentation on Highly variable Northern Hemisphere temperatures
reconstructed from low- and high-resolution proxy data


Geographic Coverage
 N: 90.0 S: 0.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: Moberg, A., D.M. Sonechkin, K. Holmgren, N.M. Datsenko and W. Karlen
Dataset Title: 2,000-Year Northern Hemisphere Temperature Reconstruction
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2005-019
Dataset Release Date: February 2005
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2005-019
Other Citation Details: NOAA/NCDC Paleoclimatology Program
Online Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mobe...


Temporal Coverage
Start Date: 0001-01-01
Stop Date: 1979-12-31


Paleo_Temporal_Coverage
Paleo Start Date: 2000 ybp
Paleo Stop Date: 0 ybp
Chrono Unit:


Location Keywords
GEOGRAPHIC REGION > NORTHERN HEMISPHERE


Data Resolution
Temporal Resolution: Decadal


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE TEMPERATURE >TEMPERATURE ANOMALIES    [Definition]
PALEOCLIMATE >LAND RECORDS >TREE RINGS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >STRATIGRAPHIC SEQUENCE    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >AIR TEMPERATURE RECONSTRUCTION    [Definition]
PALEOCLIMATE >LAND RECORDS >BOREHOLES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >BOREHOLES    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
OCEANS


Project
PAGES >Past Global Changes, IGBP    [Information]


Keywords
temperature reconstruction
climate variability
multicentennial variability


Data Set Progress
COMPLETE


Originating Center
NOAA/NCDC


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



Distribution
Distribution_Media: online ftp
Distribution_Format: ascii
Fees: none


Personnel
ANDERS MOBERG
Role: INVESTIGATOR
Contact Address:
Department of Meteorology
Stockholm University
City: Stockholm
Postal Code: SE-106 91
Country: Sweden


DIMITY M. SONECHKIN
Role: INVESTIGATOR
Contact Address:
Dynamical-Stochastical Laboratory
Hydrometeorological Research Centre of Russia
Bolshoy Predtechensky Lane 11/13
City: Moscow
Postal Code: 123 242
Country: Russia


KARIN HOLMGREN
Role: INVESTIGATOR
Contact Address:
Department of Physical Geography and Quaternary Geology
Stockholm University
City: Stockholm
Postal Code: SE-106 91
Country: Sweden


NINA M. DATENSKO
Role: INVESTIGATOR
Contact Address:
Dynamical-Stochastical Laboratory
Hydrometeorological Research Centre of Russia
Bolshoy Predtechensky Lane 11/13
City: Moscow
Postal Code: 123 242
Country: Russia


WIBJORN KARLEN
Role: INVESTIGATOR
Contact Address:
Department of Physical Geography and Quaternary Geology
Stockholm University
City: Stockholm
Postal Code: SE-106 91
Country: Sweden


Publications/References
Moberg, A., D.M. Sonechkin, K. Holmgren, N.M. Datsenko and W. Karlen. 2005.
Highly variable Northern Hemisphere temperatures reconstructed from low- and
high-resolution proxy data. Nature, Vol. 433, No. 7026, pp. 613-617, 10
February 2005.

Creation and Review Dates
DIF Creation Date: 2005-03-07
Last DIF Revision Date: 2006-08-29

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