气候变化领域集成服务门户(CCPortal): Ground-Based Observations Reveal Unique Valley Precipitation Patterns in the Central Himalaya

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DOI	10.1029/2019JD031502
	Ground-Based Observations Reveal Unique Valley Precipitation Patterns in the Central Himalaya
	Ouyang L.; Yang K.; Lu H.; Chen Y.; Lazhu; Zhou X.; Wang Y.
发表日期	2020
ISSN	2169897X
卷号	125 期号:5
英文摘要	While the Himalayas act as a natural barrier to water vapor transport to the Tibetan Plateau, many north-south-oriented valleys channel moisture onto the Plateau. However, owing to the lack of in situ data, the spatiotemporal characteristics of precipitation remain unclear along these valleys. In this study, a high-altitude (2,800–4,500 m above mean sea level) rain-gauge network was established in the Yadong Valley, one of the main valleys in the central Himalayan Region (CHR). New observations from this network are used to evaluate the Integrated Multi-satellitE Retrieval for Global Precipitation Measurement (IMERG) precipitation product, with results demonstrating that the IMERG data can reproduce the seasonal and diurnal patterns of precipitation seen in the observational data. This combination of in situ and IMERG precipitation data reveals two unique characteristics in the CHR. First, precipitation during the premonsoon season (March-May) contributes 20–40% of the annual total, from the high altitudes of the CHR to Southeast Tibetan Plateau, due to water vapor flux conveyed by southwesterlies from the Bay of Bengal, whereas this percentage is much lower in the northern Himalaya and South Asia. Second, diurnal variations in precipitation during the monsoon season (June-September) vary between the low and high altitudes of the north-south-oriented valleys in the CHR: Precipitation at high altitudes has two peaks (one in the afternoon and the other at night), which is different from the single nighttime peak in low altitudes that is usually reported. These two notable spatiotemporal characteristics are indicative of the unique climate that exists at the high altitudes of the CHR. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	central Himalaya; diurnal cycle; precipitation; seasonal variation
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186130
作者单位	Ministry of Education Key Laboratory for Earth System Modeling, Department for Earth System Science, Tsinghua University, Beijing, China; Center for Excellence in Tibetan Plateau Earth Sciences, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Ministry of Education Field Observation and Research Station for Ecology of East Asian Migratory Birds and Their Habitats, Tsinghua University, Beijing, China; National Tibetan Plateau Data Center, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Ouyang L.,Yang K.,Lu H.,et al. Ground-Based Observations Reveal Unique Valley Precipitation Patterns in the Central Himalaya[J],2020,125(5).
APA	Ouyang L..,Yang K..,Lu H..,Chen Y..,Lazhu.,...&Wang Y..(2020).Ground-Based Observations Reveal Unique Valley Precipitation Patterns in the Central Himalaya.Journal of Geophysical Research: Atmospheres,125(5).
MLA	Ouyang L.,et al."Ground-Based Observations Reveal Unique Valley Precipitation Patterns in the Central Himalaya".Journal of Geophysical Research: Atmospheres 125.5(2020).