Our strongly replicated collections of dendrochronologically dated tree-ring material of bristlecone pine (Pinus longaeva) from multiple locations in the high mountains of the Great Basin and nearby regions constitute a unique environmental archive. Their tree-ring widths have yielded multi-millennial histories of moisture availability, tree growth, temperature and tree-line elevation as well as of the chronology and influence of climatically effective, explosive volcanic eruptions.
The Ob River is the third largest Eurasian river supplying heat and freshwater to the Arctic Ocean. These inputs influence water salinity, ice coverage, ocean temperatures, ocean circulation, and ultimately the global climate system. Variability of discharge of the Ob River on long time scales is poorly understood because gaged flow records are short.
