globalchange  > 气候减缓与适应
DOI: 10.1175/JCLI-D-17-0317.1
Scopus记录号: 2-s2.0-85047075520
论文题名:
Probability distribution for the visually observed fractional cloud cover over the ocean
作者: Aleksandrova M.; Gulev S.K.; Belyaev K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期:8
起始页码: 3207
结束页码: 3232
语种: 英语
英文关键词: Climatology ; Cloud cover ; Clouds ; Statistical techniques
Scopus关键词: Climatology ; Clouds ; Probability density function ; Accurate estimation ; Cloud cover ; Fractional cloud cover ; Gamma distribution ; Probability density distribution ; Statistical techniques ; Three parameters ; Voluntary observing ships ; Probability distributions ; climatology ; cloud cover ; global ocean ; observational method ; parameterization ; probability ; seasonality ; statistical analysis
英文摘要: The authors suggest a three-parameter bounded distribution from the family of mixed gamma distributions for characterizing the probability density distributions of fractional total and low cloud cover over the global oceans. The authors derive both the continuous form of this distribution and its discrete counterpart, which can be directly applied to cloud cover reports. The distribution is applied to the cloud cover characteristics reported by voluntary observing ships (VOS) for the period from 1950 to 2011 after filtering nighttime observations with poor lunar illumination. The suggested distribution demonstrates a high goodness of fit to the data and good skill in capturing probability distributions with different shapes. The authors present seasonal climatologies of the parameters of the derived distribution for the chosen 60-yr period and demonstrate that applying the PDF-based concept to the analysis of cloud cover allows identification of areas where similar mean cloud amounts can be produced by probability distributions with very different shapes. The roles of the different parameters of the distribution in producing the observed cloud conditions in different regions of the World Ocean are discussed. The application of the derived probability distribution allows for accurate estimation of the percentiles of the distribution, which represent the probabilities of specific cloud conditions. These probabilities are presented for both total and low cloud cover, as well as for daytime and nighttime. The authors also discuss the applicability of the suggested distribution for the validation of different cloud cover data products over the globe and the prospects of additional applications. © 2018 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111601
Appears in Collections:气候减缓与适应

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作者单位: Shirshov Institute of Oceanology, Moscow, Russian Federation; Moscow State University, Moscow, Russian Federation; Department of Mathematics, Federal University of Bahia, Salvador, Brazil

Recommended Citation:
Aleksandrova M.,Gulev S.K.,Belyaev K.. Probability distribution for the visually observed fractional cloud cover over the ocean[J]. Journal of Climate,2018-01-01,31(8)
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