DOI: 10.5194/hess-22-31-2018
Scopus记录号: 2-s2.0-85040247103
论文题名: Tributaries affect the thermal response of lakes to climate change
作者: Vinnä L ; R ; , Wüest A ; , Zappa M ; , Fink G ; , Bouffard D
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 1 起始页码: 31
结束页码: 51
语种: 英语
Scopus关键词: Atmospheric temperature
; Lakes
; Rivers
; Suspended sediments
; Temperature
; Water resources
; Anthropogenic heat source
; Deterministic models
; Hydraulic residence time
; Hydrologic systems
; Seasonal flow variations
; Seasonal variation
; Suspended sediment concentrations
; Water temperatures
; Climate change
; air temperature
; anthropogenic source
; climate change
; climate forcing
; climate modeling
; environmental response
; fluvial process
; heat source
; hydrological regime
; lake water
; river discharge
; river water
; stratification
; temperature effect
; tributary
; water temperature
; Aare River
; Bern [Switzerland]
; Bielersee
; Lake Geneva
; Rhone River
; Switzerland
英文摘要: Thermal responses of inland waters to climate change varies on global and regional scales. The extent of warming is determined by system-specific characteristics such as fluvial input. Here we examine the impact of ongoing climate change on two alpine tributaries, the Aare River and the Rhône River, and their respective downstream peri-alpine lakes: Lake Biel and Lake Geneva. We propagate regional atmospheric temperature effects into river discharge projections. These, together with anthropogenic heat sources, are in turn incorporated into simple and efficient deterministic models that predict future water temperatures, river-borne suspended sediment concentration (SSC), lake stratification and river intrusion depth/volume in the lakes. Climate-induced shifts in river discharge regimes, including seasonal flow variations, act as positive and negative feedbacks in influencing river water temperature and SSC. Differences in temperature and heating regimes between rivers and lakes in turn result in large seasonal shifts in warming of downstream lakes. The extent of this repressive effect on warming is controlled by the lakes hydraulic residence time. Previous studies suggest that climate change will diminish deep-water oxygen renewal in lakes. We find that climate-related seasonal variations in river temperatures and SSC shift deep penetrating river intrusions from summer towards winter. Thus potentially counteracting the otherwise negative effects associated with climate change on deep-water oxygen content. Our findings provide a template for evaluating the response of similar hydrologic systems to on-going climate change. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79440
Appears in Collections: 气候变化事实与影响
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作者单位: Physics of Aquatic Systems Laboratory - Margaretha Kamprad Department, École Polytechnique Fédérale de Lausanne, Institute of Environmental Engineering, Lausanne, Switzerland; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Surface Waters - Research and Management, Kastanienbaum, Switzerland; Swiss Federal Institute for Forest, Snow and Landscape Research, WSL, Birmensdorf, Switzerland; Center for Environmental Systems Research, CESR, University of Kassel, Kassel, Germany
Recommended Citation:
Vinnä L,R,, Wüest A,et al. Tributaries affect the thermal response of lakes to climate change[J]. Hydrology and Earth System Sciences,2018-01-01,22(1)