Colorado Frost Rings Data Set: readme file
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               World Data Center A- Paleoclimatology
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NOTE: PLEASE CITE ORIGINAL CONTRIBUTOR WHEN USING THIS DATA!!!!!

CONTRIBUTOR: F. Craig Brunstein, USGS 
IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 96-028
SUGGESTED DATA CITATION: Brunstein, F. C.  Colorado Frost Rings Data Set,
IGBP PAGES/World Data Center-A for Paleoclimatology Data Contribution 
Series # 96-028.  NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

NAME OF DATA SET: Colorado Frost Rings Data Set 
LAST UPDATE:  12/96 
GEOGRAPHIC REGION: Colorado, USA
PERIOD OF RECORD: 569 B.C - AD 1993.
LIST OF FILES: Colofrlr.doc, Amlfr.doc (Microsoft Word format),
Colofrlr.txt, Amlfr.txt (ASCII Text files), frostring.readme (this file). 

DESCRIPTION:
Earlywood and Latewood frost rings and light rings in bristlecone pines 
sampled on Almagre Mountain, Black Mountain, Mount Princeton, North Peak,
and Stanley Mountain from 569 B.C. to A.D. 1993, and comparison to 
reported frost rings at other bristlecone pine sites (data from Brunstein, 1995)

SITE NAMES: Almagre Mountain, Black Mountain, Mount Princeton, 
North Peak, Stanley Mountain
SITE CODES: AM, BM, MP, NP, SM
ELEVATION: 3353-3700 meters (AM), 3380-3540 (BM), 3585-3700 (MP), 
3540-3570 (NP), 3430-3550 (SM)
LATITUDE: 38 46 N (AM), 38 43 N (BM), 38 44 N (MP), 37 53 N (NP), 39 47 N (SM)
LONGITUDE: 104 59 W (AM), 105 41 W (BM), 106 13 W (MP), 105 2 W (NP), 
105 48 (SM)
SPECIES: Pinus Aristata,  species code PIAR
COMMON NAME: Rocky Mountain bristlecone pine
CHRONOLOGY TYPE: latewood frost ring, light ring, and earlywood frost ring
FIRST AND LAST YEAR: 569 B.C. to A.D. 1993 (AM), A.D. 152-1992 (BM), 
359 B.C. to A.D. 1992 (MP), A.D. 1536-1993 (NP), A.D. 1380-1993 (SM)

ORIGINAL REFERENCES:
Brunstein, F. C., 1995: Bristlecone pine frost-ring and light-ring chronologies
from 569 B.C. to A.D. 1993, Colorado.  U.S. Geological Survey 
Open-File Report 95-63. 25 pp.

Brunstein, F.C., 1996, Climatic significance of the bristlecone pine 
latewood frost-ring record at Almagre Mountain, Colorado, U.S.A.: 
Arctic and Alpine Research, v. 28, n. 1, p. 66-77.

ADDITIONAL REFERENCES:
Krebs, P. H., 1972: Dendrochronology and the distribution of bristlecone pine
in Colorado.  Ph.D. dissertation, University of Colorado. 211 pp.

LaMarche, V. C., Jr., 1970: Frost-damage rings in subalpine conifers and their
application to tree-ring dating problems, In Smith, J. H. G. 
and Worrall, J.,(eds.), Tree-ring analysis with special reference to 
Northwest America.  The University of British Columbia Faculty of Forestry 
Bulletin, 7: 99-100.

LaMarche, V. C., Jr., and Hirschboeck, K. K., 1984: Frost rings in trees 
as records of major volcanic eruptions. Nature, 307: 121-126.