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DOI	10.1007/s00704-019-02790-3
	Diurnal and seasonal variation of heat fluxes over an agricultural field in southeastern Nepal
	Acharya, Ram Hari; Sigdel, Madan; Ma, Yaoming; Wang, Binbin
通讯作者	Sigdel, M (通讯作者)
发表日期	2019
ISSN	0177-798X
EISSN	1434-4483
起始页码	2949
结束页码	2960
卷号	137 期号:3-4
英文摘要	The southeastern part of Nepal is traditionally known as the entrance of the South Asian summer monsoon system (SASM) and plays a vital role in the development of the national agro-economy. This research examined the diurnal and seasonal variation in the heat and mass fluxes. The study area lies in the agricultural fields that maintain crop cycles. Half-hourly data for a period of 54months starting in October 2012 were obtained from the Tarahara surface flux observation system (SFOS), and the analyzed data included fast response eddy covariance measurements. The results show that all radiation components changed diurnally and seasonally, except for downward longwave radiation, which revealed weak diurnal variation during winter months. The winter surface albedo of the agricultural field was higher than the summer surface albedo and varied from 0.13 to 0.19. Latent heat release was found to be strongest during the summer season and was associated with atmospheric moisture content and precipitation. Sensible heat becomes weaker during summer and exhibits significant variation during winter months. The sensible heat flux increased rapidly with the increasing radiation flux during the pre-monsoon, which is a major energy source for driving atmospheric systems. The partitioning of energy into turbulent fluxes was also analyzed and it was found that the released latent heat consumed 67% of the net radiation; furthermore, 21% was consumed by the released sensible heat. The response of the land surface heat fluxes to the large-scale circulation system was clearly identified on the basis of the highest peak values observed in 2015 and 2016.
关键词	ENERGY-BALANCE CLOSURE CARBON-DIOXIDE NET-RADIATION CO2 FLUXES WATER EVAPOTRANSPIRATION MOISTURE PRAIRIE MONSOON FOREST
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000477054700093
来源期刊	THEORETICAL AND APPLIED 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/259507
推荐引用方式 GB/T 7714	Acharya, Ram Hari,Sigdel, Madan,Ma, Yaoming,et al. Diurnal and seasonal variation of heat fluxes over an agricultural field in southeastern Nepal[J]. 中国科学院青藏高原研究所,2019,137(3-4).
APA	Acharya, Ram Hari,Sigdel, Madan,Ma, Yaoming,&Wang, Binbin.(2019).Diurnal and seasonal variation of heat fluxes over an agricultural field in southeastern Nepal.THEORETICAL AND APPLIED CLIMATOLOGY,137(3-4).
MLA	Acharya, Ram Hari,et al."Diurnal and seasonal variation of heat fluxes over an agricultural field in southeastern Nepal".THEORETICAL AND APPLIED CLIMATOLOGY 137.3-4(2019).