Multi-Proxy North Atlantic Oscillation Reconstruction: readme file
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              World Data Center for Paleoclimatology, Boulder
                                and 
                   NOAA Paleoclimatology Program
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NOTE: PLEASE CITE ORIGINAL REFERENCES WHEN USING THIS DATA!!!!!

CONTRIBUTORS: Glueck, Mary F. and Stockton, Charles W.
NAME OF DATA SET:  Multi-Proxy North Atlantic Oscillation Reconstruction

IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2001-084

SUGGESTED DATA CITATION: Glueck, Mary F. and Stockton, Charles W., 2001, 
Multi-Proxy North Atlantic Oscillation Reconstruction.  
International Tree-Ring Data Bank.  IGBP PAGES/World Data Center-A for 
Paleoclimatology Data Contribution Series 2001-084. 
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

ORIGINAL REFERENCE:
Glueck, M.F. and Stockton, C.W., 2001, 
Reconstruction of the North Atlantic Oscillation, 1429-1983, 
International Journal of Climatology, 21, 1453-1465. 

ADDITIONAL REFERENCES:
Chbouki, N., 1992, Spatio-temporal characteristics of drought 
as inferred from tree-ring data in Morocco, 
Ph.D. thesis, University of Arizona, Tucson, Arizona. 

Chbouki, N., Stockton, C.W., and Myers, D., 1995, 
Spatio-temporal patterns of drought in Morocco, 
International Journal of Climatology, 15, 187-205. 

Lindholm, M., 1996, Reconstruction of past climate from ring-width 
chronologies of Scots pine (Pinus sylvestri L.) at the northern forest 
limit in Fennoscandia, University of Joensuu Publications Sciences 40.

The Greenland Summit Ice Cores CD-ROM, 1997, 
Available from the NSIDC and WDC Paleo, Boulder, CO

LAST UPDATE:  12/2001 (Original receipt by WDC-A Paleo)
GEOGRAPHIC REGION: North Atlantic
PERIOD OF RECORD: 1429-1983 AD; 
note this is a winter season (DJF) reconstruction; date range given is December date

LIST OF FILES: Readme_Glueck2001_NAO.txt (this file), Glueck2001_NAO.txt, 
Glueck2001_NAO_treecrn.txt.

DESCRIPTION:
Tree-ring records from Morocco and Finland are combined with GISP2 d18O and 
accumulation records to develop a lengthy multi-proxy reconstruction of the 
winter season (December, January, February) North Atlantic Oscillation (NAO).   
The reconstruction extends from AD 1429-1983, (December date) accounting for 
31% of the variance in the instrumental NAO over the calibration period of 
AD 1863-1983 (December date).  The instrumental NAO index used for 
calibration purposes was calculated based on sea level pressure data from 
Iceland and from Lisbon, Portugal (J. Hurrell, personal communication).  
The reconstruction does capture the low frequency variability and spectral 
characteristics of the instrumental NAO.  While the reconstruction does not 
quite capture the wide range of magnitudes evident in the instrumental record, 
it does capture the timing of persistent patterns in the instrumental record.  
This reconstruction suggests that the seemingly anomalous high period evident 
in the instrumental NAO over the past few decades is not unique when considered 
in the multi-century context of this NAO reconstruction.   

Data provided here include the NAO reconstruction and the Moroccan tree-ring 
chronologies used in creating the reconstruction. The Karhunpe, Finland chronology 
is available through the ITRDB.  The GISP2 data is available on CD-ROM and 
online through WDC-A Paleoclimatology.

See the Original Reference for complete details of data, reconstruction methodology, 
and results.