Increasing terrestrial ecosystem carbon release in response to autumn cooling and warming

Abstract Part of the Northern Hemisphere has experienced widespread autumn cooling during most recent decades despite overall warming, but how this contrasting temperature change influenced ecosystem carbon exchange remains unclear. Here, we show that occurred over about half area north 25° N since 2004, producing a weak trend period 2004–2018. Multiple lines evidence suggest an increasing net CO 2 release in In areas, is due to larger decrease gross primary productivity (GPP) growth than total respiration (TER) suppressed by cooling. warming TER increased more GPP because and wetting conditions are favourable for increase. Despite opposite trends, there been systematic increase across middle high latitudes.