@Article{CurtarelliAlcāRennStec:2014:PhChWi,
author = "Curtarelli, Marcelo Pedroso and Alc{\^a}ntara, Enner Herenio de
and Renn{\'o}, Camilo Daleles and Stech, Jose Luiz",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Physical changes within a large tropical hydroelectric reservoir
induced by wintertime cold front activity",
journal = "Hydrology and Earth System Sciences",
year = "2014",
volume = "18",
number = "8",
pages = "3079--3093",
abstract = "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 degrees C. The occurrence of cold front passages
impacted the diurnal mixed layer (DML), by increasing the
turbulent energy input (similar to 54\%) and the DML depth
(similar to 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.",
doi = "10.5194/hess-18-3079-2014",
url = "http://dx.doi.org/10.5194/hess-18-3079-2014",
issn = "1027-5606",
label = "isi 2014-11 CurtarelliAlcaRennStec:2014:PhChWi",
language = "en",
targetfile = "hess-18-3079-2014curtarelli.pdf",
urlaccessdate = "15 jun. 2024"
}