Projected increases in intensity, frequency, and terrestrial carbon costs of compound drought and aridity events.

ABSTRACT: Drought and atmospheric aridity pose large risks to ecosystem services and agricultural production. However, these factors are seldom assessed together as compound events, although they often occur simultaneously. Drought stress on terrestrial carbon uptake is characterized by soil moisture (SM) deficit and high vapor pressure deficit (VPD). We used in situ observations and 15 Earth system models to show that compound events with very high VPD and low SM occur more frequently than expected if these events were independent. These compound events are projected to become more frequent and more extreme and exert increasingly negative effects on continental productivity. Models project intensified negative effects of high VPD and low SM on vegetation productivity, with the intensification of SM

SUBMITTER: Zhou S 

PROVIDER: S-EPMC6357735 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature