Impact of Solar Radio Flux on Precipitation in China

The energy from the sun is the ultimate source to drive atmospheric circulations on the earth, which is closely related to weather and climate events. The response of climate to the solar activity has two categories: the “top-down” and “bottom-up” mechanisms. The “bottom-up" mechanism is through the direct TSI effects at the surface involving solar energy absorption. Our research result indicates that in high and low years of Solar Radio Flux(SRF), winter temperature and atmospheric circulation in Northeast Asia have different responses to the solar activity through “bottom-up" mechanism . In high(low) SRF year, there was an anomalous high(low) pressure around northeast Asia , while higher(lower) temperature existed and southeast(northwest) wind predominated, which brought warm moist (cold dry) air mass to Northeast Asia. Simultaneously, rainfall in northeast of China increased(decreased). Correlation coefficient between gauge rainfall in northeast of China and SRF beyond 0.01 significance test level. In summer, SRF modulated the relation of snow depth over the Tibetan Plateau and precipitation in China, and the rain belt distribution were different obviously in high and low SRF years respectively.

Keywords: Solar Radio FluxG Northeast AsiaG snow depth over the Tibetan PlateauG winter precipitation in Northeast of ChinaG summer precipitation in China