DOI: 10.5194/hess-19-3787-2015
Scopus记录号: 2-s2.0-84941255182
论文题名: Quantifying energy and water fluxes in dry dune ecosystems of the Netherlands
作者: Voortman B ; R ; , Bartholomeus R ; P ; , Van Der Zee S ; E ; A ; T ; M ; , Bierkens M ; F ; P ; , Witte J ; P ; M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 9 起始页码: 3787
结束页码: 3805
语种: 英语
Scopus关键词: Atmospheric temperature
; Biodiversity
; Drought
; Ecology
; Evapotranspiration
; Feedback
; Groundwater
; Physiological models
; Plants (botany)
; Potable water
; Vegetation
; Water
; Water resources
; Actual evapotranspiration
; Drinking water production
; Ecosystem services
; Evapotranspiration modeling
; Ground water recharge
; Long-wave radiation
; Potential evapotranspiration
; Radiative surfaces
; Ecosystems
; dune field
; ecosystem service
; energy flux
; evapotranspiration
; grass
; hydrometeorology
; longwave radiation
; moss
; parameterization
; Penman-Monteith equation
; quantitative analysis
; radiative transfer
; recharge
; water budget
; water exchange
; water management
; Netherlands
; Bryophyta
; Calluna
; Campylopus introflexus
; Hypnum cupressiforme
英文摘要: Coastal and inland dunes provide various ecosystem services that are related to groundwater, such as drinking water production and biodiversity. To manage groundwater in a sustainable manner, knowledge of actual evapotranspiration (ETa/ for the various land covers in dunes is essential. Aiming at improving the parameterization of dune vegetation in hydrometeorological models, this study explores the magnitude of energy and water fluxes in an inland dune ecosystem in the Netherlands. Hydrometeorological measurements were used to parameterize the Penman-Monteith evapotranspiration model for four different surfaces: bare sand, moss, grass and heather. We found that the net longwave radiation (Rnl) was the largest energy flux for most surfaces during daytime. However, modeling this flux by a calibrated FAO-56 Rnl model for each surface and for hourly time steps was unsuccessful. Our Rnl model, with a novel submodel using solar elevation angle and air temperature to describe the diurnal pattern in radiative surface temperature, improved Rnl simulations considerably. Model simulations of evaporation from moss surfaces showed that the modulating effect of mosses on the water balance is species-dependent. We demonstrate that dense moss carpets (Campylopus introflexus) evaporate more (5 %, +14 mm) than bare sand (total of 258mm in 2013), while more open-structured mosses (Hypnum cupressiforme) evaporate less (-30 %, -76 mm) than bare sand. Additionally, we found that a drought event in the summer of 2013 showed a pronounced delayed signal on lysimeter measurements of ETa for the grass and heather surfaces, respectively. Due to the desiccation of leaves after the drought event, and their feedback on the surface resistance, the potential evapotranspiration in the year 2013 dropped by 9% (-37 mm) and 10% (-61 mm) for the grass and heather surfaces, respectively, which subsequently led to lowered ETa of 8% (-29 mm) and 7% (-29 mm). These feedbacks are of importance for water resources, especially during a changing climate with an increasing number of drought days. Therefore, such feedbacks need to be integrated into a coupled plant physiological and hydrometeorological model to accurately simulate ETa. In addition, our study showed that groundwater recharge in dunes can be increased considerably by promoting moss vegetation, especially of open-structured moss species. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78431
Appears in Collections: 气候变化事实与影响
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作者单位: KWR Watercycle Research Institute, P.O. Box 1072, BB Nieuwegein, Netherlands; Soil Physics and Land Management, Environmental Sciences Group, Wageningen University, P.O. Box 47, AA Wageningen, Netherlands; Department of Physical Geography, Faculty of Geosciences, Utrecht University, P.O. Box 80115, TC Utrecht, Netherlands; Deltares, P.O. Box 85467, AL Utrecht, Netherlands; VU University, Institute of Ecological Science, Department of Systems Ecology, de Boelelaan 1085, HV Amsterdam, Netherlands
Recommended Citation:
Voortman B,R,, Bartholomeus R,et al. Quantifying energy and water fluxes in dry dune ecosystems of the Netherlands[J]. Hydrology and Earth System Sciences,2015-01-01,19(9)