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atmospheric methane
flux
co2
environments
temperature
peatlands
alaska
cycle
c-14
ch4
Abstract:
The sizes of major sources and sinks of atmospheric methane (CH4), an important greenhouse gas, are poorly known, CH4 from north Siberian lakes contributes similar to 1.5 teragrams CH4 year(-1) to observed winter increases in atmospheric CH4 concentration at high northern latitudes, CH4 emitted from these lakes in winter had a radiocarbon age of 27,200 years and was derived largely from Pleistocene-aged carbon.
