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Estimates of Climatic Changes Following Volcanic C Eruptions from Tree Growth Records,
ARMY ELECTRONIC PROVING GROUND FORT HUACHUCA AZ
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The purpose of this project was to detect and estimate anomalous, annual precipitation during a period of 10 years following volcanic eruptions. In order to accomplish this, a record of precipitation was required which would span the time period covered by the volcanic record and yet would provide a resolution of 1 year. Since the record of volcanic eruptions extends as far back as 1500 AD, the meteorological records available were clearly too short. For this reason, the records of tree growth were sought as a proxy record of climatic data. The requirement for linking this proxy record of tree ring data to climatic data is to build a regression model of precipitation based on tree ring data coincident with the available precipitation data. This regression model would then be used to estimate the precipitation during the years following volcanic eruptions. There has been a considerable amount of past work published showing that tree growth data can be a good record of past climates.
APPROVED FOR PUBLIC RELEASE