aridity

, suggesting the significant shifting of sediment provenance, the stable trending of tectonic movement, and the wet and torridity aridity of paleoclimate condition.

从芒乡组的潮湿炎热的气候转变为郁组的干燥凉爽，显然与青藏高原隆升密切相关。

6.Where aridity, degeneration or soil erosion occurs as a result of overgrazing, users of the grasslands shall be required to reduce grazing and resow forage grass so as to restore vegetation.

因过量放牧造成草原沙、退、流失的，草原使用者应当调整放牧强度，补种牧草，恢复植被。