Interdecadal change in autumn rainfall over Southeast China and its association with tropical Pacific SST

In this paper, Japan Meteorological Agency (JRA-55) reanalysis and observational rainfall datasets from the National Climate Center (NCC) of China, as well satellite Tropical Rainfall Measuring Mission (TRMM), Global Precipitation Climatology Project (GPCP), International Satellite Cloud (ISCCP), are used. The correlation coefficient fast Fourier transform (FFT) low-pass filter also used, in order to reveal interdecadal decrease autumn Southeast China (SEC) after 1990. close robust relationship between variation SEC sea surface temperature (SST) tropical Pacific is investigated. most significant stable region located 10° S–10° N, 160° E–160° W, which there exists warming Furthermore, SST can induce Gill responses atmosphere: a cyclone anomaly produced on each side equator lower troposphere, with westerly west dateline, an anticyclone upper troposphere. particular, northern Northwest (NWP), its ambient northerly airflow weakens meridional water vapor transport, local descending motion low-troposphere divergence, favor addition, sensitive experiments ECHAM-5.4 model confirm that (10° W) would motivate atmospheric response thereby cause sinking support SEC.