DOI: 10.5194/hess-18-3079-2014
Scopus记录号: 2-s2.0-84921442447
论文题名: Physical changes within a large tropical hydroelectric reservoir induced by wintertime cold front activity
作者: Curtarelli M ; P ; , Alcântara E ; H ; , Rennó C ; D ; , Stech J ; L
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 8 起始页码: 3079
结束页码: 3093
语种: 英语
Scopus关键词: Digital storage
; Remote sensing
; Water quality
; Weather forecasting
; Diurnal mixed layer
; Hydroelectric reservoirs
; Interpretation of remotely sensed images
; Meteorological disturbance
; Remote sensing data
; Sensible and latent heat fluxes
; Three-dimensional hydrodynamic modeling
; Tropical reservoirs
; Tropics
; cold front
; heat balance
; mixed layer
; mixing
; remote sensing
; reservoir
; satellite data
; simulation
; water
; water temperature
; weather forecasting
; Brazil
; South America
英文摘要: We investigated the influence of wintertime cold front activity on the physical processes within a large tropical reservoir located in Brazil. The period chosen for this study consisted of 49 days between 28 April 2010 and 15 July 2010. This period was defined based on information from the Brazilian Center for Weather Forecasting and Climate Studies (CPTEC), data collected in situ and the interpretation of remotely sensed images. To better understand the governing processes that drive changes in the heat balance, differential cooling and mixing dynamics, a simulation was performed that utilized a three-dimensional hydrodynamic model enforced with in situ and remote sensing data. The results showed that during a cold front passage over the reservoir, the sensible and latent heat fluxes were enhanced by approximately 77 and 16%, respectively. The reservoir's daily averaged heat loss was up to 167% higher on the days with cold front activity than on the days without activity. The cold front passage also intensified the differential cooling process; in some cases the difference between the water temperature of the littoral and pelagic zones reached up to 8 °C. The occurrence of cold front passages impacted the diurnal mixed layer (DML), by increasing the turbulent energy input (~54%) and the DML depth (~41%). Our results indicate that the cold front events are one of the main meteorological disturbances driving the physical processes within hydroelectric reservoirs located in tropical South America during the wintertime. Hence, cold front activity over these aquatic systems has several implications for water quality and reservoir management in Brazil. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78164
Appears in Collections: 气候变化事实与影响
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作者单位: National Institute for Space Research, São José dos Campos, São Paulo, Brazil; São Paulo State University, Presidente Prudente, São Paulo, Brazil
Recommended Citation:
Curtarelli M,P,, Alcântara E,et al. Physical changes within a large tropical hydroelectric reservoir induced by wintertime cold front activity[J]. Hydrology and Earth System Sciences,2014-01-01,18(8)