Fig. 6: Physical mechanisms of the mid-summer dipole TP precipitation pattern affecting the wildfires in Siberia.
From: Arctic wildfire carbon emissions strongly influenced by midsummer Tibetan Plateau precipitation
The large-scale latent heating released by the mid-summer dipole pattern in TP precipitation triggers anticyclonic anomalies in the upper-level troposphere to the northeast of the TP, leading to a northward shift of the subtropical jet stream. The vorticity forcing on the northern flank of the jet induces cyclonic anomalies, creating atmospheric conditions favorable for wildfires in Central Siberia (CSB), while suppressing wildfire occurrence in Eastern Siberia (ESB). The results were derived from composing the differences between cases with high and low PC1 of TP precipitation.
