福州城市热岛精细化时空结构特征研究

Refined Spatiotemporal Structure Characteristics of Fuzhou Urban Heat Island

利用福州地区139个自动站2012—2020年逐时气温资料,对福州城市热岛时空结构进行研究并探讨其成因。结果表明,加密自动站清晰地展现了福州城市热岛的精细结构表现为“多中心”特征,即除了福州市中心城区的热岛主中心外,在闽清县城区和福清市城区还有两个副热岛中心,热岛强度在0.8℃~1.6℃之间。此外,除永泰及闽侯等山区呈负热岛外,大部地区呈正热岛。在城市热岛演变趋势上,福州郊区及山区大部呈减少趋势,呈增长趋势的区域仅分布在闽清、罗源沿海、永泰东部、中心城区、闽侯南部、福清北部、长乐南部、连江西部等地区,速率为每10 a 0℃~0.25℃。

Based on the hourly air temperature data from 139 automatic stations in Fuzhou from 2012 to 2020,the spatiotemporal structure of Fuzhou urban heat island was studied and its causes were discussed.The results showed that the fine structure of Fuzhou urban heat island clearly demonstrated the characteristics of“polycentric”by encryption automatic stations,that is,besides the main heat island center in the downtown area of Fuzhou,there were two sub-heat island centers in the urban area of Minqing County and Fuqing,and the heat island intensity was between 0.8℃and 1.6℃.In addition,except for Yongtai and Minhou mountains,most areas showed positive heat island.In terms of the evolution trend of urban heat island,most of the suburbs and mountainous areas in Fuzhou showed a decreasing trend,while the increasing trend were only distributed in Minqing,Luoyuan coastal areas,eastern Yongtai,central city,southern Minhou,northern Fuqing,southern Changle,western Lianjiang etc.,with a rate of 0℃~0.25℃every 10 years.