水资源与水工程学报2025，Vol.36Issue(5)：121-127,7.DOI:10.11705/j.issn.1672-643X.2025.05.14
1960-2020年黄土高原地区降水特征时空格局研究
Spatio-temporal patterns of precipitation from 1960 to 2020 over the Loess Plateau
摘要
Abstract
Understanding the spatio-temporal variations of precipitation is crucial for regional water re-sources management and ecological environment protection in Loess Plateau.Based on daily precipitation observations from 292 meteorological stations across the Loess Plateau from 1960 to 2020,this study ana-lyzes the spatio-temporal characteristics of precipitation amount,precipitation days,and precipitation in-tensity using the Mann-Kendall trend test and linear trend analysis.The results indicate that the long-term mean annual precipitation was 433 mm,with an average of 80 precipitation days and a precipitation intensity of 5.3 mm/day.All three indicators exhibited a decreasing spatial gradient from southeast to northwest.The number of precipitation days ranged from 36 to 134,dominating by the range of 60-100.Precipitation intensity varied from 3.1 to 9.1 mm/day,with the 6 mm/day isohyet showing a zonal distri-bution west of 111°E longitude.Over the past 61 years,the region has experienced an overall decreasing trend in precipitation amount,with a climatic tendency rate of-4 mm·(10a)-1.The number of pre-cipitation days has also declined,whereas precipitation intensity showed no significant change.A pro-nounced spatial disparity in temporal trends is observed on both sides of the Linxia-Lanzhou-Qingyang-Yan'an-Taiyuan line,precipitation has generally decreased south to the line but increased north to it.The spatial pattern of precipitation indicators presented distinct interdecadal variations.The 1990s wit-nessed the most substantial decrease in precipitation days,while the 2010s saw increases in both precipi-tation amount and intensity.These findings highlight the complexity and regional heterogeneity of precipi-tation changes across the Loess Plateau,which can provide a scientific basis for water resources manage-ment and climate change adaptation in the region.关键词
降水量/降水日数/降水强度/时空分布/黄土高原Key words
precipitation amount/precipitation days/precipitation intensity/spatio-temporal distribu-tion/the Loess Plateau分类
大气科学引用本文复制引用
刘艳艳,张耀宗,王东,张多勇..1960-2020年黄土高原地区降水特征时空格局研究[J].水资源与水工程学报,2025,36(5):121-127,7.基金项目
国家社会科学基金项目(22XZS022) （22XZS022）
2023年甘肃省高校青年博士支持项目(2023QB-018) （2023QB-018）
庆阳市重点研发计划项目(社会发展类)(QY-STK-2023B-109) （社会发展类）
