Sergey A. Zimov

TL;DR: It is found that thawing permafrost along lake margins accounts for most of the methane released from the lakes, and it is estimated that an expansion of thaw lakes between 1974 and 2000, which was concurrent with regional warming, increased methane emissions in the study region by 58 per cent.

TL;DR: The authors showed that climate warming will thaw permafrost, releasing trapped carbon from this high-latitude reservoir and further exacerbating global warming, and showed that carbon dioxide can be released from the frozen reservoir.

TL;DR: In this article, seasonal and annual constituent fluxes have been determined using consistent sampling and analytical methods at the pan-Arctic scale and consequently provide the best available estimates for constituent flux from land to the Arctic Ocean and surrounding seas.

TL;DR: The sizes of major sources and sinks of atmospheric methane (CH4), an important greenhouse gas, are poorly known as discussed by the authors, but it is known that CH4 from north Siberian lakes contributes ∼1.5 teragrams CH4 year−1 to observed winter increases in atmospheric CH4 concentration at high northern latitudes.

TL;DR: It is found that CH4 bubbling from newly forming thermokarst lakes comprised 33 to 87% of the high-latitude increase in atmospheric methane concentration and, in turn, contributed to the climate warming at the Pleistocene-Holocene transition.