[Keyword='climate change']
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Northern Hemisphere Temperature Reconstruction for the Past Millennium
Entry ID:
NOAA_NCDC_PALEO_1999-014
Summary
Abstract:
Abstract (from the online documentation):
Building on recent studies, we attempt hemispheric temperature reconstructions with proxy data networks for the past millennium. We focus not just on the reconstructions, but the uncertainties therein, and important caveats. Though expanded uncertainties prevent decisive conclusions for the period prior to AD 1400, our results suggest that the latter 20th century is anomalous in the context of at least the past millennium. The 1990s was the warmest decade, and 1998 the warmest year, at moderately high levels of confidence. The 20th century warming counters a millennial-scale cooling trend which is consistent with long-term astronomical forcing.
Related URL
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
Data Set Citation
Dataset Originator/Creator:
Michael E. Mann, Raymond S. Bradley, and Malcolm K. Hughes
Dataset Title:
Northern Hemisphere Temperature Reconstruction for the Past Millennium
Dataset Series Name:
IGBP PAGES/WDC CONTRIBUTION SERIES NUMBER: 1999-014
Dataset Release Date:
March 1999
Dataset Release Place:
Boulder, CO
Dataset Publisher:
IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification:
1999-014
Other Citation Details:
NOAA/NCDC Paleoclimatology Program
Online Resource:
http://www.ncdc.noaa.gov/paleo/pubs/mann_99.html
Temporal Coverage
Start Date:
1000-01-01
Stop Date:
1998-12-31
Paleo Temporal Coverage
Paleo Start Date:
1000 ybp
Paleo Stop Date: 0 ybp Chrono Unit: Location Keywords
Science Keywords
ISO Topic Category
Quality
Data validation
The ideal procedure for compiling the CGA is as follows: 1. to collate the official publications issued by the different countries; 2. to manipulate the data in order to transform data into a homogeneous set; and 3. to have the new dataset validated by the representative of countries. Unfortunately conditions a) and c) have not always been fulfilled. Nevertheless, for the sake of completeness, those data which had not come from an official publication and those which have not received final validation have been included in the CGA. The different sources and status of validation are shown in Annex E.
Service Provider
Personnel
Role:
TECHNICAL CONTACT
Phone:
+61 3 6232 3528
Fax:
+61 3 6232 3351
Email:
mapping at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City:
Kingston
Province or State:
Tasmania
Postal Code:
7050
Country:
Australia
Creation and Review Dates
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