Causal mediation of urban temperature by geopotential height in U.S. cities
Causal mediation of urban temperature by geopotential height in U.S. cities
复制标题
DOI：
10.1016/j.scs.2023.105010
复制
发表时间：
2024-01
影响因子：
11.7
通讯作者：
Yihang Wang;Xueli Yang;Zhi-Hua Wang
中科院分区：
文献类型：
--
作者：
Yihang Wang;Xueli Yang;Zhi-Hua Wang
过度变暖是城市地区许多环境挑战的根源。发现城市环境温度与其他气象变量之间的因果相互作用将极大地促进我们对城市热的潜在机制的理解。本研究利用2016 - 2022年美国520个城市的2 m气温和500 hPa位势高度（GPH）数据，基于收敛交叉映射方法检测其局部和非局部因果相互作用。对于温度和GPH之间的局部（同一城市内）相互作用，在阿巴拉契亚山脉北部和CONUS西南部内陆存在强烈因果相互作用的中心，而落基山脉南部背风侧由于该地区的斜压而表现出较低的因果关系。非局地因果网络表现出潜在的远程联系（远相关），主要归因于上游和下游西风环流对局地大气变量的影响。该研究可为利益相关者设计可持续的对策以缓解城市地区的过热提供信息。
Excessive warming is the source of many environmental challenges in urban areas. Finding causal interactions between urban ambient temperature and other meteorological variables will greatly facilitate our understanding of the underlying mechanisms of urban heat. In this study, we use the data of 2-m air temperature and 500 hPa geopotential height (GPH) in 520 cities in the contiguous United States (CONUS), from 2016 to 2022, to detect their local and nonlocal causal interactions based on the convergent cross-mapping method. For local (within the same city) interactions between temperature and GPH, there are hubs of strong causal interactions in the northern Appalachian Mountain and inland southwestern CONUS, whereas the leeward side of the southern Rocky Mountains exhibit low causation due to the baroclinic in this area. The nonlocal causal networks exhibit potential long-range connections (teleconnections), largely attributable to the influence of the upstream and downstream westerly circulations on local atmospheric variables. This study can be informative to stakeholders in design sustainable countermeasures to mitigate excessive heat in urban areas.