Zoning of precipitation regimes on the Qinghai–Tibet Plateau and its surrounding areas responded by the vegetation distribution

• Published in: The Science of the total environment Vol. 838; no. Pt 2; p. 155844
• Main Authors: Li, Fang-Fang, Lu, Hou-Liang, Wang, Guang-Qian, Yao, Zhan-Yu, Li, Qiong, Qiu, Jun
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 10.09.2022
• Subjects: Precipitation regimes; Response; Temporal distribution of precipitation; The Qinghai–Tibet Plateau; Vegetation; Response; Precipitation regimes; Temporal distribution of precipitation; The Qinghai–Tibet Plateau; Vegetation
• ISSN: 0048-9697; 1879-1026
• DOI: 10.1016/j.scitotenv.2022.155844

Compared with other factors influencing vegetation patterns, such as light and temperature, precipitation has relatively large variability, especially on the Qinghai–Tibet Plateau (QTP), where the natural environment is extremely fragile and sensitive. However, the impact of precipitation regimes, rather than precipitation amount, on vegetation has seldom been revealed. This study characterised the precipitation regimes by both the amount and temporal distribution of precipitation and zoned the QTP as different precipitation regimes accordingly. The response of vegetation to such precipitation regimes was then investigated. The results indicate that the vegetation patterns are quite consistent with zoning, that is, there is a certain type or a few dominant types of vegetation in each sub-region divided by the precipitation regimes. The areas where the precipitation became more uniform within a year were concentrated in grassland and bare land, which benefits the restoration and improvement of the ecological environment of the plateau. The increase in precipitation variability in the south-eastern part of the plateau may lead to natural disasters such as floods and mudslides. This study provides a novel perspective to understand the distribution of vegetation patterns. [Display omitted] •Precipitation regimes are identified by both the amount and the temporal variability.•Vegetation distribution has a strong response to these two factors simultaneously.•27% of QTP area with significant trend towards more uniform precipitation were concentrated in grassland and bare land.•Increase in precipitation variability in the southeastern plateau may lead to floods and mudslides.