DOI: 10.5194/hess-21-6253-2017
Scopus记录号: 2-s2.0-85038352360
论文题名: Response of water temperatures and stratification to changing climate in three lakes with different morphometry
作者: Magee M ; R ; , Wu C ; H
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 12 起始页码: 6253
结束页码: 6274
语种: 英语
Scopus关键词: Atmospheric temperature
; Climate change
; Ecology
; Heat flux
; Speed
; Temperature
; Water quality
; Wind
; Changing climate
; Ecological consequences
; Pearson correlation
; Sensible heat flux
; Surface heat fluxes
; Thermal structure
; Thermal variables
; Water temperatures
; Lakes
; air temperature
; climate change
; epilimnion
; hydrological response
; hypolimnion
; lake water
; mixing
; morphometry
; stratification
; thermal structure
; water quality
; water temperature
; wind velocity
英文摘要: Water temperatures and stratification are important drivers for ecological and water quality processes within lake systems, and changes in these with increases in air temperature and changes to wind speeds may have significant ecological consequences. To properly manage these systems under changing climate, it is important to understand the effects of increasing air temperatures and wind speed changes in lakes of different depths and surface areas. In this study, we simulate three lakes that vary in depth and surface area to elucidate the effects of the observed increasing air temperatures and decreasing wind speeds on lake thermal variables (water temperature, stratification dates, strength of stratification, and surface heat fluxes) over a century (1911- 2014). For all three lakes, simulations showed that epilimnetic temperatures increased, hypolimnetic temperatures decreased, the length of the stratified season increased due to earlier stratification onset and later fall overturn, stability increased, and longwave and sensible heat fluxes at the surface increased. Overall, lake depth influences the presence of stratification, Schmidt stability, and differences in surface heat flux, while lake surface area influences differences in hypolimnion temperature, hypolimnetic heating, variability of Schmidt stability, and stratification onset and fall overturn dates. Larger surface area lakes have greater wind mixing due to increased surface momentum. Climate perturbations indicate that our larger study lakes have more variability in temperature and stratification variables than the smaller lakes, and this variability increases with larger wind speeds. For all study lakes, Pearson correlations and climate perturbation scenarios indicate that wind speed has a large effect on temperature and stratification variables, sometimes greater than changes in air temperature, and wind can act to either amplify or mitigate the effect of warmer air temperatures on lake thermal structure depending on the direction of local wind speed changes. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78970
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, United States; Center of Limnology, University of Wisconsin-Madison, Madison, WI, United States
Recommended Citation:
Magee M,R,, Wu C,et al. Response of water temperatures and stratification to changing climate in three lakes with different morphometry[J]. Hydrology and Earth System Sciences,2017-01-01,21(12)