Characteristics of Lake Breezes and Their Impacts on Energy and Carbon Fluxes in Mountainous Areas

摘要: In mountainous lake areas, lake-land and mountain-valley breezes interact with each other, leading to an “extended breeze”. These extended can regulate control energy carbon cycles at different scales. Based on meteorological turbulent fluxes data from eddy covariance observation site Erhai Lake in the Dali Basin, southwest China, characteristics of daytime nighttime their impacts dioxide exchange 2015 are investigated. dominate during while, due prevailing circulations night, there two types breezes. The mountain breeze Cangshan Mountain range leads N1 type events. When a cyclonic circulation forms maintains southern part its northern branch contributes formation N2 wind directions for daytime, N1, events southeast, west, respectively. Daytime more intense than weaker During events, decreases sensible heat flux (Hs) ( $$\boldsymbol{F}_{\text{CO}_{2}}$$ ) increases latent (LE). Hs LE . For southeast surface Results indicate that lakes areas promote mixing but suppress exchange.