An analysis of the urbanization contribution to observed terrestrial stilling in the Beijing-Tianjin-Hebei region of China

被引:20
|
作者
Wang, Jun [1 ]
Feng, Jinming [1 ]
Yan, Zhongwei [1 ,2 ]
Qiu, Yuan [1 ]
Cao, Lijuan [3 ]
机构
[1] Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm Temperate East Asia, Beijing 100029, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] China Meteorol Adm, Natl Meteorol Informat Ctr, Beijing 100081, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
urbanization; terrestrial stilling; dynamic urban-rural classification; reanalysis; SURFACE WIND-SPEED; LAND-USE CHANGE; COVER CHANGE; TRENDS; PATTERNS; INCREASE; IMPACT; HAZE;
D O I
10.1088/1748-9326/ab7396
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Decreases in terrestrial near-surface wind speed (NSWS) were documented in many regions over the past decades. Various drivers have been proposed for this terrestrial stilling, such as weakening of ocean-land pressure gradients related to climate change and increased surface roughness linked to vegetation growth; but none have been robustly established as the cause. A plausible reason for this quandary is that the local impact of urbanization on NSWS has been overlooked. Here, we used homogenized NSWS records from in situ weather stations and a satellite-based dynamic urban-rural classification scheme to quantitatively assess the contribution of urbanization to observed terrestrial stilling during 1980-2016 over the Beijing-Tianjin-Hebei region of China. Results suggested that urbanization contributed approximately 8% to the observed decrease in the regional NSWS in urban areas, implying that urbanization played a minor role in terrestrial stilling, even in this rapidly developing region. The largest NSWS changes related to urbanization occurred in winter, followed by spring, autumn, and summer. Urbanization reduced the days with relatively strong winds but increased the days with light and gentle winds. We found that except for the Japanese 55 year reanalysis (JRA-55) dataset, none of the common reanalysis products reproduced the observed NSWS trends in urban or rural areas. However, this could be because of JRA-55's intrinsic negative bias in NSWS trends over land. Thus, regional terrestrial NSWS trends derived from reanalysis products deserve careful examination.
引用
收藏
页数:11
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