In this area,there are 6 and 7 remarkable moist and dry periods,respectively. The reconstructed moisture index from March to June in the recent 200 years has stable periods of 11,16,5,8,3 and 32 a.

• 天山东段近200 a来3~6月湿润指数序列的显著周期是11 a；然后依次存在16 a、5 a、8 a、3 a和32 a的稳定周期.