EAST ASIAN SUMMER MONSOON AND THE RAINFALL IN EAST CHINA - Advances in Geosciences - page 51

Fig. 6. Same as Fig. 5 except for the distribution of the rainfall percentage anomalies
in China (average for 28th-45th pentad).

to normal obviously during the 33rd-34th pentad and during the 38th-39th
pentad, staying at south of Yangtze River and near the lower of Yellow
River during the 33rd-34th and the 38th-39th pentad, respectively. But it
is north to normal obviously in 45th pentad with stay at the lower of Yellow
River. EASM retreat south of 20 ◦ N and the rainfall in East China decreased
remarkably in the 47th pentad. In this period, the EASM's movement
presents the obvious regional characters, during 30th-34th pentad, the front
mainly concentrate in South China and it stay at the lower of Yellow River
during 36th-38th pentad and 45th pentad, and the abnormal EASM index
was positive in above two regions (Fig. 7(b)) and southwesterly anomalies
cover North China. But negative EASM's index anomalies and easterly
anomalies cover the mid-lower of Yangtze Valley. The abnormal movement
of EASM brought more precipitation to South China and North China, but
it caused the persistent droughts in the Yangtze Valley (Fig. 6(b)). Though
the precipitation in South China and North China was more than normal, it
was less than previous period. In this period, the spatial distribution pattern
of the precipitation anomaly percentage is “+, ,+, ”fromSouthChina

− −

to Northeast China (Fig. 7(b)).