Physical Sciences and Mathematics Commons^™

Climate Response In Near-Treeline Bristlecone Pine, Matthew W. Salzer, Evan R. Larson, Andrew Godard Bunn, Malcolm Kenneth Hughes

Environmental Sciences Faculty and Staff Publications

In the White Mountains of California, eight bristlecone pine (Pinus longaeva) tree-ring width chronologies were developed from trees at upper treeline and just below upper treeline along North- and South-facing elevational transects from treeline to ~90 m below. There is evidence for a climate-response threshold between approximately 60–80 vertical m below treeline, above which trees have shown a positive growth-response to temperature and below which they do not. Chronologies from 80 m or more below treeline show a change in climate response and do not correlate strongly with temperature-sensitive chronologies developed from trees growing at upper treeline. Rather, they more …

Lake Whatcom Monitoring Project 2012/2013 Report, Robin A. Matthews, Michael Hilles, Joan Vandersypen, Robert J. Mitchell, Geoffrey B. Matthews, Katherine Beeler

Lake Whatcom Annual Reports

This report is part of an on-going series of annual reports and special project reports that document the Lake Whatcom monitoring program. This work is conducted by the Institute for Watershed Studies and other departments at Western Washington University.

The major objective of this program is to provide long-term baseline water quality monitoring in Lake Whatcom and selected tributaries. Each section contains brief explanations about the water quality data, along with discussions of patterns observed in Lake Whatcom.

Lake Whatcom Water Quality Summary Report September 30, 2014 (Rev. Oct 9, 2014), Institute For Watershed Studies

Lake Whatcom Other Reports

This report summarizes the preliminary water quality data collected for the Lake Whatcom monitoring project from July–September 2014. The report format has been modified to enable hyperlinks to the figures; the links are indicated using blue text.

Five Millennia Of Paleotemperature From Tree-Rings In The Great Basin, Usa, Matthew W. Salzer, Andrew Godard Bunn, Nicholas E. (Nicholas Earl) Graham, Malcolm Kenneth Hughes

Environmental Sciences Faculty and Staff Publications

The instrumental temperature record is of insufficient length to fully express the natural variability of past temperature. High elevation tree-ring widths from Great Basin bristlecone pine (Pinus longaeva) are a particularly useful proxy to infer temperatures prior to the instrumental record in that the tree-rings are annually dated and extend for millennia. From ring-width measurements integrated with past treeline elevation data we infer decadal- to millennial-scale temperature variability over the past 4,500 years for the Great Basin, USA. We find that twentieth century treeline advances are greater than in at least 4,000 years. There is also evidence for …