GSTDTAP  > 地球科学
DOI10.1016/j.atmosres.2017.05.008
Effective cloud optical depth and enhancement effects for broken liquid water clouds in Valencia (Spain)
Marin, M. J.1; Serrano, D.2; Utrillas, M. P.2; Nunez, M.3; Martinez-Lozano, J. A.2
2017-10-01
发表期刊ATMOSPHERIC RESEARCH
ISSN0169-8095
EISSN1873-2895
出版年2017
卷号195页码:43473
文章类型Article
语种英语
国家Spain; Australia
英文摘要

Partly cloudy skies with liquid water clouds have been analysed, founding that it is essential to distinguish data if the Sun is obstructed or not by clouds. Both cases can be separated considering simultaneously the Cloud Modification Factor (CMF) and the dearness index (k(t)). For partly cloudy skies and the Sun obstructed the effective cloud optical depth (tau) has been obtained by the minimization method for overcast skies. This method was previously developed by the authors but, in this case, taking into account partial cloud cover. This study has been conducted for the years 2011-2015 with the multiple scattering model SBDART and irradiance measurements for the UV Erythemal Radiation (UVER) and the broadband ranges. Afterwards a statistical analysis of tau has shown that the maximum value is much lower than for overcast skies and there is more discrepancy between the two spectral ranges regarding the results for overcast skies. In order to validate these results the effective cloud optical depth has been correlated with several transmission factors, giving similar fit parameters to those obtained for overcast skies except for the clearness index in the UVER range. As our method is not applicable for partly cloudy skies with the visible Sun, the enhancement of radiation caused by clouds when the Sun is visible has been studied. Results show that the average enhancement CMF values are the same for both ranges although enhancement is more frequent for low cloud cover in the UVER and medium-high cloud cover in the broadband range and it does not depend on the solar zenith angle.


英文关键词Effective cloud optical depth (tau) Enhancement Broken clouds Liquid water clouds UV Erythemal radiation (UVER) Broadband irradiance Multiple scattering models
领域地球科学
收录类别SCI-E
WOS记录号WOS:000405050500001
WOS关键词UV IRRADIANCE ; RADIATION MEASUREMENTS ; WAVELENGTH DEPENDENCE ; SPECTRAL DEPENDENCY ; OVERCAST CONDITIONS ; SURFACE ; SOLAR ; ATMOSPHERE ; NORTHERN ; NETWORK
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/15162
专题地球科学
作者单位1.Univ Valencia, Solar Radiat Grp, Dept Matemat Econ & Empresa, Valencia 46022, Spain;
2.Univ Valencia, Solar Radiat Grp, Dept Fis Terra & Termodinam, E-46100 Valencia, Spain;
3.Univ Tasmania, Sch Geog & Environm Studies, Hobart, Tas 7001, Australia
推荐引用方式
GB/T 7714
Marin, M. J.,Serrano, D.,Utrillas, M. P.,et al. Effective cloud optical depth and enhancement effects for broken liquid water clouds in Valencia (Spain)[J]. ATMOSPHERIC RESEARCH,2017,195:43473.
APA Marin, M. J.,Serrano, D.,Utrillas, M. P.,Nunez, M.,&Martinez-Lozano, J. A..(2017).Effective cloud optical depth and enhancement effects for broken liquid water clouds in Valencia (Spain).ATMOSPHERIC RESEARCH,195,43473.
MLA Marin, M. J.,et al."Effective cloud optical depth and enhancement effects for broken liquid water clouds in Valencia (Spain)".ATMOSPHERIC RESEARCH 195(2017):43473.
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