The influence of population movements on the urban relative humidity of Beijing during the Chinese Spring Festival holiday
The influence of population movements on the urban relative humidity of Beijing during the Chinese Spring Festival holiday
复制标题
春节期间人口流动对北京城市相对湿度的影响
DOI：
10.1016/j.jclepro.2017.09.274
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发表时间：
2018
影响因子：
11.1
通讯作者：
Lingyun Wu
中科院分区：
文献类型：
--
作者：
Jingyong Zhang;Lingyun Wu
在中国，每年春节或春节假期前都有数亿人离开大城市，并在年后返回，这引发了地球上最大规模的短期人口迁移。地面相对湿度是一个重要的气象变量，对城市居民的生活有着深远的影响。然而，在CSF假期期间大规模的人类迁移在多大程度上或如何影响城市相对湿度仍然是未知的。本文以北京市为例，分析了2005-2014年（不包括2008年奥运年）人口迁移对城市相对湿度的影响。请注意，在本研究中，人口流动引起的城市相对湿度变化是相对于附近的非城市值的。在研究期间，平均而言，北京的城市相对湿度增加了4.00%，在CSF周相对于非假日背景期间，在99%的置信水平上具有统计学意义。相对而言，这一变化相当于背景期间城市与附近非城市地区相对湿度差异的76%。在CSF周期间，城市相对湿度的显着增加在中国中部的郑州也很明显，支持信号的鲁棒性。这些发现为人口流动对城市相对湿度的影响提供了重要但以前未知的证据，并可以增加我们对人类-城市关系的理解。
In China, hundreds of millions of people move out of the large cities before the Chinese Spring Festival (CSF) or Chinese New Year holiday and return after every year, spurring the greatest short-term migration of human beings on earth. Surface relative humidity is a key meteorological variable that has profound impacts on the lives of city dwellers. However, it remains unknown to what extent or how mass human migration during the CSF holiday can affect urban relative humidity. Here, we focus on the period of 2005–2014 with the Olympic year of 2008 excluded, and present observational evidence for the impacts of human migration on urban relative humidity with Beijing used as an example. Note that urban relative humidity variations induced by population movements are relative to nearby non-urban values in this study. Averaged over the study period, Beijing's urban relative humidity increased by 4.00% during the CSF week relative to the non-holiday background period, statistically significant at the 99% confidence level. In relative terms, this change amounts to 76% of relative humidity difference between urban and nearby non-urban areas during the background period. This significant increase of urban relative humidity during the CSF week is also apparent in central China's Zhengzhou, supporting the robustness of the signal. These findings offer vital yet previously unknown evidence for population movement impacts on urban relative humidity from the observations, and can add value to our understanding of the human-cities nexus.
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影响因子：
6.3
作者：
Zhang, Q. H.;Zhang, Q. H.;Zhang, J. P.;Zhang, J. P.;Xue, H. W.;Xue, H. W.
通讯作者：
Xue, H. W.
影响因子：
--
作者：
W. Malm;D. Day;S. Kreidenweis;J. Collett;Taehyoung Lee
通讯作者：
W. Malm;D. Day;S. Kreidenweis;J. Collett;Taehyoung Lee
DOI：
10.1002/2013jd021225
发表时间：
2014-05
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
Francisco Salamanca;M. Georgescu;A. Mahalov;M. Moustaoui;Meng Wang
通讯作者：
Francisco Salamanca;M. Georgescu;A. Mahalov;M. Moustaoui;Meng Wang
影响因子：
30.7
作者：
Liming Zhou;Yuhong Tian;S. Roy;C. Thorncroft;L. Bosart;Yuanlong Hu
通讯作者：
Liming Zhou;Yuhong Tian;S. Roy;C. Thorncroft;L. Bosart;Yuanlong Hu
影响因子：
--
作者：
Jingyong Zhang;Lingyun Wu
通讯作者：
Jingyong Zhang;Lingyun Wu