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Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence
Huang, Y (Huang, Ying)1; Guo, HQ (Guo, Haiqiang)2; Chen, XL (Chen, Xuelong)3; Chen, ZH (Chen, Zihan)1; van der Tol, C (van der Tol, Christiaan)4; Zhou, YX (Zhou, Yunxuan)1; Tang, JW (Tang, Jianwu)1,5
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
2019
Volume279Issue:0Pages:107755
DOI10.1016/j.agrformet.2019.107755
Abstract

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.

Subject AreaAtmospheric Sciences
WOS IDWOS:000500197400040
Language英语
Indexed BySCI
KeywordEnergy-balance Closure Latent-heat Flux Phragmites-australis Biophysical Controls Co2 Exchange Water Wetland Carbon Atmosphere River
WOS Research AreaAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
Cooperation Status国际
ISSN0168-1923
Department环境变化与地表过程重点实验室
URL查看原文
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9059
Collection图书馆
Corresponding AuthorTang, JW (Tang, Jianwu)
Affiliation1.East China Normal Univ, Inst Ecochongming, State Key Lab Estuarine & Coastal Res, Shanghai, Peoples R China;
2.Fudan Univ, Key Lab Biodivers Sci & Ecol Engn, Minist Educ, Shanghai, Peoples R China;
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China;
4.Univ Twente, Fac Geoinformat Sci & Earth Observat, Enschede, Netherlands;
5.Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02543 USA.
Recommended Citation
GB/T 7714
Huang, Y ,Guo, HQ ,Chen, XL ,et al. Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,279(0):107755.
APA Huang, Y .,Guo, HQ .,Chen, XL .,Chen, ZH .,van der Tol, C .,...&Tang, JW .(2019).Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence.AGRICULTURAL AND FOREST METEOROLOGY,279(0),107755.
MLA Huang, Y ,et al."Meteorological controls on evapotranspiration over a coastal salt marsh ecosystem under tidal influence".AGRICULTURAL AND FOREST METEOROLOGY 279.0(2019):107755.
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