We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
基于FY-4A QPE的中亚五国降水时空分布特征.
- Authors
陈爱军; 张 寅; 楚志刚
- Abstract
The FY-4A Quantitative Precipitation Estimation (QPE) product is crucial for comprehensive research on precipitation patterns and spatiotemporal distribution across Central Asian (CA) countries. In this study, FY4A QPE data quality was evaluated using the Integrated Multi- satellite Retrievals for Global Precipitation Measurement Final run (IMERG-F), and the precipitation characteristics and spatiotemporal distribution over five CA countries were subsequently examined. The main findings were as follows. (1) FY- 4A QPE accurately reflected precipitation spatial disparities across the CA countries, aligning well with the temporal changes of IMERG-F. (2) Annual average precipitation (AAP) exhibited substantial spatial variation over the CA countries in relation to altitude. High-altitude regions exceeded 500 mm AAP, encompassing <10% of the area, whereas lowaltitude areas experienced <350 mm AAP, accounting for >90% of the region. (3) Precipitation distribution exhibited pronounced seasonality across the five CA countries. Summer exhibited the widest precipitation range, averaging >50 mm. Conversely, the autumn average, typically <40 mm, was the lowest. Kyrgyzstan and Tajikistan experienced sufficient precipitation year- round, with some areas showing an average >480 mm. However, central and western Kazakhstan, Uzbekistan, and northern Turkmenistan received <40 mm. (4) According to clustering of areas with a monthly average precipitation exceeding 40 mm, the five CA countries were classified into four spatial distribution types: point discrete, drought, semi-dry and semi-wet, and sandwich. (5) In summer across the five CA countries, areas with elevated precipitation density displayed a near 3- hour cyclic daily variation. Notably, one of these periods occurred from noon to the first half of the night. Furthermore, the predominant precipitation type was light rain, with a minor occurrence of moderate rain.
- Subjects
TURKMENISTAN; TAJIKISTAN; KYRGYZSTAN; RAINFALL; AUTUMN; SPATIAL variation; DATA quality; ALTITUDES; DROUGHTS
- Publication
Arid Zone Research / Ganhanqu Yanjiu, 2023, Vol 40, Issue 9, p1369
- ISSN
1001-4675
- Publication type
Article
- DOI
10.13866/j.azr.2023.09.01