Arid
DOI10.1016/j.atmosenv.2015.09.077
Influences of extinction coefficient profile on the estimation of Slant Visual Range
Sun, Xuejin; Zhou, Yongbo; Zhang, Riwei; Zhou, Junhao; Li, Haoran
通讯作者Zhou, Yongbo
来源期刊ATMOSPHERIC ENVIRONMENT
ISSN1352-2310
EISSN1873-2844
出版年2015
卷号122页码:484-492
英文摘要

Slant Visual Range (SVR) is defined as the distance at which the contrast of a given object with respect to its background is just equal to the contrast threshold of an observer in slant direction. In this study, estimation methods and errors of SVR are explored in lidar-free circumstances where Extinction Coefficient Profile (ECP), vertical distribution of Single Scattering Albedo (SSA) and asymmetry parameter (ASY) cannot be acquired. Statistical characteristics of aerosol optical properties in the Taklimakan Basin for sand-dust weather are derived from the CALIPSO daytime aerosol product from 2011 to 2014. SSA and ASY are approximated as 0.92 and 0.7 because aerosol types are mainly dust and polluted dust throughout layers. Besides, ECP can be categorized into exponential, Gaussian and other patterns. Based on whether the determination of real ECP into one of the three patterns is feasible, two SVR estimation methods are introduced and termed the accurate estimation method (AEM) and the blind estimation method (BEM), both methods are performed using SBDART radiative transfer model. For the AEM, analysis of estimated SVR and real SVR reveals a minimum linear correlation coefficient of 0.98 and a maximum root mean square error of 0.07, and the hit rate (R) of SVR estimation increases from 86% to nearly 100% when the maximum allowable relative error (MARE) increases from 10% to 25%. Validation of the BEM shows that R varies from 78% to 100% for MARE of 25% and falls drastically with the decrease of MARE, with the highest R value in spring and summer for the Gaussian pattern and the lowest values in fall and winter for exponential and other patterns. This study is among the first to explore the feasibility and methodology of deriving SVR in lidar-free circumstances. (C) 2015 Elsevier Ltd. All rights reserved.


英文关键词Slant visual range Extinction coefficient profile SBDART Accurate estimation method Blind estimation method
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000367413600050
WOS关键词SINGLE-SCATTERING ALBEDO ; CALIPSO OBSERVATIONS ; TAKLIMAKAN DUST ; VISIBILITY ; LIDAR ; RETRIEVALS ; AEROSOLS ; EVENTS ; DESERT
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186102
作者单位PLA Univ Sci & Technol, Coll Meteorol & Oceanog, Nanjing 211101, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714
Sun, Xuejin,Zhou, Yongbo,Zhang, Riwei,et al. Influences of extinction coefficient profile on the estimation of Slant Visual Range[J],2015,122:484-492.
APA Sun, Xuejin,Zhou, Yongbo,Zhang, Riwei,Zhou, Junhao,&Li, Haoran.(2015).Influences of extinction coefficient profile on the estimation of Slant Visual Range.ATMOSPHERIC ENVIRONMENT,122,484-492.
MLA Sun, Xuejin,et al."Influences of extinction coefficient profile on the estimation of Slant Visual Range".ATMOSPHERIC ENVIRONMENT 122(2015):484-492.
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