气候变化领域集成服务门户(CCPortal): Summer precipitation characteristics on the southern Tibetan plateau

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DOI	10.1002/joc.6914
	Summer precipitation characteristics on the southern Tibetan plateau
	Zeng, Chen; Zhang, Fan; Wang, Li; Chen, Deliang
通讯作者	Zhang, F (通讯作者)
发表日期	2021
ISSN	0899-8418
EISSN	1097-0088
起始页码	E3160
结束页码	E3177
卷号	41
英文摘要	Precipitation is an important source of streamflow and a critical parameter in hydrological studies. However, spatiotemporal variation of precipitation in the Tibetan Plateau (TP) has been poorly characterized due to the limited distribution of meteorological stations mostly in the lowlands. In this study, we set-up rain gauges to study summer precipitation on mountain slopes in three catchments of the southern TP from 2013 to 2016. We studied the precipitation gradients (PGs) averaged during the Indian monsoon season (PG(ms)), as well as daily PGs (PG(d)) and unit PGs (PG(u)) under various precipitation intensity grades (PIGs) and subdiurnal precipitation distributions. We also analysed the correlations between the PGs and precipitation amounts under various PIGs. Results showed that the mean PG(ms), PG(d) and PG(u) in the study catchments were 0.0071-0.0082% for monsoon season, 0.11-0.13 mm center dot 100 m(-1) d(-1) and 2.2-3.1%center dot 100 m(-1) for the total (nonintensity-graded) precipitation, but varied widely under different PIGs. PG(ms), PG(d) and PG(u) were all strongly correlated to precipitation amounts, which were relatively consistent between years but varied between different catchments. In addition, the correlations showed a steep positive slope under fine precipitation but became flat or even negative with increasing PIG. Generally, two distinct precipitation peaks were noted in each of the three catchments: a dispersed peak in the morning, and a stronger but sharper peak at around 18:00 LST; overall, this subdiurnal pattern was temporally stable. The mean precipitation durations of the three catchments were approximately 1.0-1.4 hr (nonintensity-graded) and increased from <0.5 hr, to <1 hr, 2-5 hr and 6-11 hr for trace, light, moderate and heavy precipitation intensities, respectively. Among the various PG units, both PG(d) and PG(u) better represented precipitation at different altitudes than that of PG(ms). Summer precipitation in the study catchments was influenced more by valley-scale convection than by large-scale monsoon circulation.
关键词	GRADIENTS SEASONALITY VARIABILITY CATCHMENT RAINFALL WEATHER EROSION CLIMATE RUNOFF CHINA
英文关键词	precipitation duration; precipitation gradient; precipitation intensity; subdiurnal distribution; Tibetan Plateau
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000587237200001
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260350
推荐引用方式 GB/T 7714	Zeng, Chen,Zhang, Fan,Wang, Li,et al. Summer precipitation characteristics on the southern Tibetan plateau[J]. 中国科学院青藏高原研究所,2021,41.
APA	Zeng, Chen,Zhang, Fan,Wang, Li,&Chen, Deliang.(2021).Summer precipitation characteristics on the southern Tibetan plateau.INTERNATIONAL JOURNAL OF CLIMATOLOGY,41.
MLA	Zeng, Chen,et al."Summer precipitation characteristics on the southern Tibetan plateau".INTERNATIONAL JOURNAL OF CLIMATOLOGY 41(2021).