气候变化领域集成服务门户(CCPortal): Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence

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DOI	10.1016/j.agrformet.2019.107755
	Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence
	Huang, Ying; Guo, Haiqiang; Chen, Xuelong; Chen, Zihan; van der Tol, Christiaan; Zhou, Yunxuan; Tang, Jianwu
通讯作者	Tang, JW (通讯作者)
发表日期	2019
ISSN	0168-1923
EISSN	1873-2240
卷号	279
英文摘要	Elucidating evapotranspiration (ET) patterns and drivers is of crucial importance for better understanding water and energy cycles. However, multiple controls on ET at coastal ecosystems that are subject to subdaily tidal flooding have not yet received attention. In this study, we investigated the response of ET to meteorological variables including photosynthetically active radiation (PAR), air temperature (T-a), vapour pressure deficit (VPD), and wind speed (WS) under semidiurnal tidal influence from hourly to seasonal timescales, on the basis of 3-year eddy-covariance (EC) measurements over a tidal salt marsh ecosystem of the Yangtze Delta. Our results show that, as with most terrestrial ecosystems, PAR is a major control on ET in this coastal salt marsh ecosystem at hourly, diel, and multiday timescales. However, the semidiurnal tides co-control ET with meteorological variables, forming a complex ET pattern at the hourly and subdaily scales. In the daytime, ET was primarily driven by PAR and VPD, whereas during the night, WS and friction velocity dominated the ET variability. We also found that wind direction fundamentally changed the nature of the interactions of ET with other variables. Moreover, tidal inundation suppressed ET and changed its sensitivities to PAR, T-a, VPD, and WS, a process that was especially obvious when offshore winds prevailed. The tidal flooding can affect ET directly through altering surface energy partitioning or plant metabolic activity, and indirectly through influencing meteorological conditions such as T-a and VPD. By explicitly considering the influence of tidal dynamics, this study revealed the significance in quantifying the ET contributions in coastal ecosystems to global water, carbon and energy cycles.
关键词	ENERGY-BALANCE CLOSURE LATENT-HEAT FLUX PHRAGMITES-AUSTRALIS BIOPHYSICAL CONTROLS CO2 EXCHANGE WATER WETLAND CARBON ATMOSPHERE RIVER
英文关键词	Coastal wetland; Evapotranspiration; Tidal influence; Meteorological controls; Eddy-covariance; Wind direction
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000500197400040
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
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/259612
推荐引用方式 GB/T 7714	Huang, Ying,Guo, Haiqiang,Chen, Xuelong,et al. Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence[J]. 中国科学院青藏高原研究所,2019,279.
APA	Huang, Ying.,Guo, Haiqiang.,Chen, Xuelong.,Chen, Zihan.,van der Tol, Christiaan.,...&Tang, Jianwu.(2019).Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence.AGRICULTURAL AND FOREST METEOROLOGY,279.
MLA	Huang, Ying,et al."Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence".AGRICULTURAL AND FOREST METEOROLOGY 279(2019).