Increasing impact of warm droughts on northern ecosystem productivity over recent decades

Climate extremes such as droughts and heatwaves have a large impact on terrestrial carbon uptake by reducing gross primary production (GPP). While the evidence for increasing frequency intensity of climate over last decades is growing, potential systematic adverse shifts in GPP not been assessed. Using observationally-constrained process-based model data, we estimate that particularly northern midlatitude ecosystems experienced +10.6% increase negative period 2000–2016 compared to 1982–1998. We attribute this predominantly greater warm droughts, particular temperate grasslands (+95.0% corresponding mean increase) croplands (+84.0%), after peak growing season. These results highlight vulnerability ecosystem productivity implying increased impacts these sinks well rising pressure global food security. The authors show ecosystems, croplands, attributed droughts. This highlights security extreme events.