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Climate 2017, 5(3), 50; doi:10.3390/cli5030050

Effects of the Lake Sobradinho Reservoir (Northeastern Brazil) on the Regional Climate

1
Potsdam Institute for Climate Impact Research, Telegrafenberg A31, 14473 Potsdam, Germany
2
Department of Physics, Humboldt University, Newtonstraße 15, 12489 Berlin, Germany
3
Environmental Data Initiative, Center for Limnology, University of Wisconsin–Madison, 680 North Park Street, Madison, WI 53706, USA
4
Federal Rural University of Pernambuco/Academic Unit of Garanhuns (UFRPE/UAG), Avenida Bom Pastor, s/n, Boa Vista, CEP: 55292–270, Garanhuns, Pernambuco, Brazil
*
Authors to whom correspondence should be addressed.
Academic Editors: Valdir Adilson Steinke and Charlei Aparecido da Silva
Received: 15 May 2017 / Revised: 8 July 2017 / Accepted: 10 July 2017 / Published: 13 July 2017
(This article belongs to the Special Issue Studies and Perspectives of Climatology in Brazil)
View Full-Text   |   Download PDF [6428 KB, uploaded 13 July 2017]   |  

Abstract

This study investigates the effects of Lake Sobradinho, a large reservoir in Northeastern Brazil, on the local near-surface atmospheric and boundary layer conditions. For this purpose, simulations with the regional climate model COSMO-CLM are compared for two different scenarios: (1) with the lake being replaced by the average normal native vegetation cover and (2) with the lake as it exists today, for two different two-month periods reflecting average and very dry conditions, respectively. The performance of the simulation is evaluated against data from surface meteorological stations as well as satellite data in order to ensure the model’s ability to capture atmospheric conditions in the vicinity of Lake Sobradinho. The obtained results demonstrate that the lake affects the near-surface air temperature of the surrounding area as well as its humidity and wind patterns. Specifically, Lake Sobradinho cools down the air during the day and warms it up during the night by up to several C depending on the large-scale meteorological conditions. Moreover, the humidity is significantly increased as a result of the lake’s presence and causes a lake breeze. The observed effects on humidity and air temperature also extend over areas relatively far away from the lake. View Full-Text
Keywords: regional climate modeling; COSMO-CLM; artificial reservoirs; near-surface air temperature; humidity; wind; lake breeze regional climate modeling; COSMO-CLM; artificial reservoirs; near-surface air temperature; humidity; wind; lake breeze
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ekhtiari, N.; Grossman-Clarke, S.; Koch, H.; Meira de Souza, W.; Donner, R.V.; Volkholz, J. Effects of the Lake Sobradinho Reservoir (Northeastern Brazil) on the Regional Climate. Climate 2017, 5, 50.

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