DOI: 10.1175/JCLI-D-14-00840.1
Scopus记录号: 2-s2.0-84957653873
论文题名: Trends in the frequency of high relative humidity over China: 1979-2012
作者: Mao R. ; Gong D.-Y. ; Zhao T. ; Wang W. ; Yang J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 24 起始页码: 9816
结束页码: 9837
语种: 英语
Scopus关键词: Atmospheric humidity
; Climatology
; Troposphere
; Climate variability
; High relative humidities
; Lower troposphere
; Midtroposphere
; Northern China
; Southeastern china
; Trends
; Variability
; Meteorology
; climate variation
; climatology
; cloud cover
; relative humidity
; trend analysis
; troposphere
; weather station
; China
英文摘要: High relative humidity (HRH) is defined as a relative humidity of at least 80%, which is often associated with the occurrence of cloud layers. Thus, the frequency of HRH and its changes in the troposphere may be related to the occurrence frequency of cloud layers and their changes. In this study, trends in the frequency of HRH (defined as days with relative humidity ≥ 80%) over China from the surface to the midtroposphere (≥ 400 hPa) from 1979 to 2012 were analyzed using a homogenized humidity dataset for spring (March-May), summer (June-August), autumn (September-November), and winter (December-February). The results for the ground level indicate decreasing trends at most stations in southeastern China in spring and in northern China in summer. In the lower troposphere (850 and 700 hPa), most stations over China exhibit positive trends in summer, autumn, and winter. For the midtroposphere (500-400 hPa), increasing trends dominate over China in spring, summer, and autumn. Finally, six reanalysis datasets, the NCEP-NCAR, NCEP-DOE, CFSR, ERA-Interim, MERRA, and JRA-55 datasets, were compared with the observed increasing trends in HRH frequency in the low-to-middle troposphere. Similar increasing trends in HRH frequency in the reanalysis datasets and the homogenized humidity data are observed in certain seasons and for certain regions. These results are consistent with the increasing low-to-middle cloud amounts in recent decades. © 2015 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50844
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China; Key Laboratory of Regional Climate-Environment Research for East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Department of Earth System Science, University of California, Irvine, Irvine, CA, United States
Recommended Citation:
Mao R.,Gong D.-Y.,Zhao T.,et al. Trends in the frequency of high relative humidity over China: 1979-2012[J]. Journal of Climate,2015-01-01,28(24)