Original documentation on the Western North America Gridpoint and Regional Summer Temperature Reconstructions can be found in the following location: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/westnamerica/briffa1992/briffa1992.txt.
The following information is excerpted from the documentation file associated with this dataset:
Western North America Gridpoint and Regional Summer Temperature Reconstructions
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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!!!!!
NAME OF DATA SET: Western North America Gridpoint and Regional Summer Temperature Reconstructions
LAST UPDATE: 10/2002 (Original Receipt by WDC Paleo)
CONTRIBUTORS: Keith R. Briffa, Philip D. Jones, Fritz H. Schweingruber
IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2002-067
SUGGESTED DATA CITATION: Briffa, K.R., et al., 2002,
Western North America Gridpoint and Regional Summer Temperature Reconstructions.
IGBP PAGES/World Data Center for Paleoclimatology
Data Contribution Series #2002-067.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.
ORIGINAL REFERENCE: Briffa, K.R., P.D. Jones, and F.H. Schweingruber, 1992,
Tree-Ring Density Reconstructions of Summer Temperature Patterns across
Western North America since 1600, Journal of Climate, vol. 5, no. 7, July 1992.
GEOGRAPHIC REGION: Western North America
PERIOD OF RECORD: 1600-1983 A.D.
ABSTRACT:
Summer half-year (April-September) mean temperatures are reconstructed across
western North America between 1600 and 1982. The reconstructions, ultimately
in the form of gridpoint anomaly time series, are produced using a
principal-components regression technique to relate variability in a network of
up to 53 high-elevation maximum latewood-density chronologies to a number of
important temperature principal-component amplitude series. The reconstructions
are of good quality over the area between 35° and 55°N but are subject to large
uncertainty north of 55°N, particularly prior to 1750. Four regional time series,
the average of between two and six gridpoint series - British Columbia and
the Pacific Northwest, California, eastern Rockies and northern High Plains,
and the Southwest deserts - plus one more-extensive western United States series
are presented and described. Examples of individual-year and decadal-mean anomaly
maps are illustrated, and the results of preliminary spectral analyses of the
regional time series are described.
DESCRIPTION:
Reconstructions of summer temperatures at each of 24 grid point locations in the
western U.S. and five regional reconstructions. As the 53-site reconstructions are
better than those from the 23 sites a 1600-1982 series for any region should be
derived from the 23 site reconstruction for 1600-1749 and the 53 site one for 1750-1982.
°C anomalies relative to the 1951-70 base period.
DATA:
osr115.dat:
Reconstructions of summer temperatures at each of 24 grid point locations in the western U.S.
Briffa, Jones, and Schweingruber, Journal of Climate, vol. 5, no. 7, July 1992
The data span 1850 - 1983. °C anomalies relative to the 1951-70 base period.
osr125.dat:
Reconstructions of summer temperatures at each of 24 grid point locations in the western U.S.
Briffa, Jones, and Schweingruber, Journal of Climate, vol. 5, no. 7, July 1992
The data span 1600 - 1983. °C anomalies relative to the 1951-70 base period.