Pan-Arctic soil moisture control on tundra carbon sequestration and plant productivity.

ABSTRACT: Long-term atmospheric CO₂ concentration records have suggested a reduction in the positive effect of warming on high-latitude carbon uptake since the 1990s. A variety of mechanisms have been proposed to explain the reduced net carbon sink of northern ecosystems with increased air temperature, including water stress on vegetation and increased respiration over recent decades. However, the lack of consistent long-term carbon flux and in situ soil moisture data has severely limited our ability to identify the mechanisms responsible for the recent reduced carbon sink strength. In this study, we used a record of nearly 100 site-years of eddy covariance data from 11 continuous permafrost tundra sites distributed across the circumpolar Arctic to test the temperature (expressed as growi

SUBMITTER: Zona D 

PROVIDER: S-EPMC10099953 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature