Lightning Enhancement in the Amazon Region Due to Urban Activity  

作　　者：Osmar Pinto Jr. Iara Regina Cardoso de Almeida Pinto Osmar P. Neto 

机构地区：[1]Atmospheric Electricity Group, Earth System Science Center, National Institute of Space Research, S. J. Campos, Brazil [2]Camilo Castelo Branco University (Unicastelo), S. J. Campos, Brazil

出　　处：《American Journal of Climate Change》2013年第4期270-274,共5页美国气候变化期刊（英文）

摘　　要：Urbanization has an increasing contribution to anthropogenic climate forcing. The impact arises mainly from the Urban Heat Island (UHI) effect and aerosol anthropogenic emissions. An important but not completely understood consequence of this forcing is its effect on local lightning activity. Changes in lightning activity may result in a feedback on the climate system. In this article, it investigates changes in the lightning activity in the city of Manaus, located in the Amazon region of Brazil. It is found that, over the city, the lightning activity is larger than in the regions around it and it has been increasing in the last four decades simultaneously with the increasing of its urban area. Our results suggest that such changes are caused by the UHI effect. The observations reported here are unique and relevant because Manaus is located in the central part of the Amazon rainforest and inside one of the three global lightning chimneys in the world.Urbanization has an increasing contribution to anthropogenic climate forcing. The impact arises mainly from the Urban Heat Island (UHI) effect and aerosol anthropogenic emissions. An important but not completely understood consequence of this forcing is its effect on local lightning activity. Changes in lightning activity may result in a feedback on the climate system. In this article, it investigates changes in the lightning activity in the city of Manaus, located in the Amazon region of Brazil. It is found that, over the city, the lightning activity is larger than in the regions around it and it has been increasing in the last four decades simultaneously with the increasing of its urban area. Our results suggest that such changes are caused by the UHI effect. The observations reported here are unique and relevant because Manaus is located in the central part of the Amazon rainforest and inside one of the three global lightning chimneys in the world.

关 键 词：LIGHTNING URBAN Effects AMAZON REGION 

分 类 号：R73[医药卫生—肿瘤]