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Evaporation and CO_(2)fluxes in a coastal reef:an eddy covariance approach

Ecosystem Health and Sustainability 2017年第10期3卷 1-21页

作者： A.Camilo Rey-Sánchez Gil Bohrer Timothy H.Morin Dekel Shlomo Golnazalsadat Mirfenderesgi hezi gildor Amatzia Genin Department of Civil Environmental and Geodetic EngineeringThe Ohio State UniversityColumbusOHUSA Department of Environmental Resources Engineering State University of New York College of Environmental Science and ForestrySyracuseNYUSA The Fredy&Nadine Herrmann Institute of Earth Sciences the Hebrew University of JerusalemJerusalemIsrael The Interuniversity Institute for Marine Sciences of Eilat Coral BeachEilatIsrael department ofDepartment of Ecology Evolution&BehaviorSilverman Institute of Life Sciencesthe Hebrew University of JerusalemEilatIsrael ecologyevolution&behaviorsilverman institute of life sciencesthe hebrew university of jerusalemeilatisrael

Introduction:We conducted season-long observations of evaporation and carbon flux at the Gulf of Aqaba coast,northern Red *** used the eddy-covariance method with a two-tower setup to measure evaporation rates over land and sea and the advection between *** a three-dimensional mass balance approach,we calculated total evaporation as the sum of two main components in our site:horizontal advection and turbulent vertical flux,with half-hourly change of water vapor storage and horizontal flux divergence found to be ***:Average evaporation rates were 11.4[mm/day]from April through May(early summer)and 10.5[mm/day]from June through August(summer).The coastal reef was a CO_(2)sink over the period of measurements,significantly higher in June through August than in April through *** main environmental drivers of CO_(2)flux were humidity,water temperature,sensible heat flux,and wind ***:The rates of evaporation near the shore were considerably higher than values reported in other studies typically used to represent the mean for the whole Gulf *** found that evaporation rates computed by common bulk models approximate the mean values of evaporation but have poor representativeness of the intra-daily temporal variation of *** was a significant correlation between CO_(2)flux and evaporation attributed to common environmental drivers of gas diffusion,turbulent fluxes,and horizontal ***:We conclude that observations of fluxes in coastal waters need to use at least a two-tower system to account for the effect of horizontal advection on the total flux.

关键词： Evaporation coral reef carbon flux advection eddy covariance

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