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North Siberian lakes: A methane source fueled by pleistocene carbon

  • Author(s): Zimov, SA;
  • Voropaev, YV;
  • Semiletov, IP;
  • Davidov, SP;
  • Prosiannikov, SF;
  • Chapin, FS;
  • Chapin, MC;
  • Trumbore, S;
  • Tyler, S
  • et al.
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 ~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.

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