干旱区生态环境知识资源中心(Arid): Surface energy fluxes in a drip-irrigated agroecosystem: Unique advection effect of oasis

Arid

DOI	10.1016/j.agrformet.2024.110204
	Surface energy fluxes in a drip-irrigated agroecosystem: Unique advection effect of oasis
	Yu, Haichao; Yang, Tianyi; Li, Sien; Kang, Shaozhong; Du, Taisheng; Wang, Yuexin; Chen, Haochong; Guo, Hui
通讯作者	Li, S
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2024
卷号	357
英文摘要	Surface energy fluxes, mainly encompassing the net radiation (R-n), latent heat flux (LE), sensible heat flux (Hs), and soil heat flux (G(s)), play an important role in the land-atmosphere interactions. However, almost all sites face the problem of energy imbalance, and advection fluxes associated with large inhomogeneous surfaces have been ignored, especially in arid oasis areas. In this study, a three-year continuous measurement of energy fluxes with an eddy covariance system was conducted in a drip-irrigated oasis agroecosystem in Northwest China. Reanalysis data including air temperature (T-a), soil moisture (B), and leaf area index (LAI) in our cropland and surrounding deserts were also collected. The results showed that multi-year mean turbulent fluxes (LE+Hs) accounted for 75 +/- 8 % (mean +/- standard deviation) of available energy (R-n-G(s)). To be precise, LE took up 72 +/- 10 % of available energy, and 7.8 +/- 2.8 % of it was induced by higher sensible heat advection, proving a pronounced advection effect in this study. When advection was present, most likely during the heading stage, the threshold value for the Priestley-Taylor parameter a, an indicator to reflect the advection effect, fell in the range of 0.88-1.34. Additionally, after a significant irrigation event, a showed a good linear relationship with differences in air temperature (Delta T-2), soil moisture (Delta theta), and leaf area index (Delta theta) between our cropland and surrounding deserts. It's worth mentioning that Delta theta was the most significant factor, showing a negative correlation with the advection effect. This study has deepened our understanding of the energy balance in oasis agriculture, emphasizing that the advection effect should not be overlooked.
英文关键词	Energy fluxes Advection effect Drip irrigation Oasis agroecosystem
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001306099200001
WOS关键词	BALANCE CLOSURE ; CROP EVAPOTRANSPIRATION ; BOUNDARY-LAYER ; BOREAL FOREST ; STORAGE TERMS ; WATER-VAPOR ; HEAT-FLUX ; PART I ; EVAPORATION ; MAIZE
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402641
推荐引用方式 GB/T 7714	Yu, Haichao,Yang, Tianyi,Li, Sien,et al. Surface energy fluxes in a drip-irrigated agroecosystem: Unique advection effect of oasis[J],2024,357.
APA	Yu, Haichao.,Yang, Tianyi.,Li, Sien.,Kang, Shaozhong.,Du, Taisheng.,...&Guo, Hui.(2024).Surface energy fluxes in a drip-irrigated agroecosystem: Unique advection effect of oasis.AGRICULTURAL AND FOREST METEOROLOGY,357.
MLA	Yu, Haichao,et al."Surface energy fluxes in a drip-irrigated agroecosystem: Unique advection effect of oasis".AGRICULTURAL AND FOREST METEOROLOGY 357(2024).