干旱区生态环境知识资源中心(Arid): Cirrus-induced shortwave radiative effects depending on their optical and physical properties: Case studies using simulations and measurements

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DOI	10.1016/j.atmosres.2020.105095
	Cirrus-induced shortwave radiative effects depending on their optical and physical properties: Case studies using simulations and measurements
	Cordoba-Jabonero, Carmen; Gomez-Martin, Laura; del Aguila, Ana; Manuel Vilaplana, Jose; Lopez-Cayuela, Maria-Angeles; Zorzano, Maria-Paz
通讯作者	Cordoba-Jabonero, C
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2020
卷号	246
英文摘要	Cirrus (Ci) clouds play an important role in the atmospheric radiative balance, and hence in Climate Change. In this work, a polarized Micro-Pulse Lidar (P-MPL), standard NASA/Micro Pulse NETwork (MPLNET) system, deployed at the INTA/El Arenosillo station in Huelva (SW Iberian Peninsula) is used for Ci detection and characterization for the first time at this site. Three days were selected on the basis of the predominantly detected Ci clouds in dependence on their cloud optical depth (COD). Hence, three Ci cloud categories were examined at day-times for comparison with solar radiation issues: 19 cases of sub-visuals (svCi, COD: 0.01-0.03) on 1 October 2016, 7 cases of semitransparents (stCi, COD: 0.03-0.30) on 8 May 2017, and 17 cases of opaques (opCi, COD: 0.3-3.0) on 28 October 2016. Their radiative-relevant optical, macro- and micro-physical properties were retrieved. The mean COD for the svCi, stCi and opCi groups was 0.02 +/- 0.01, 0.22 +/- 0.08 and 0.93 +/- 0.40, respectively; in overall, their lidar ratio ranged between 25 and 35 sr. Ci clouds were detected at 11-13 km height (top boundaries) with geometrical thicknesses of 1.7-2.0 km. Temperatures reported at those altitudes corresponded to lower values than the thermal threshold for homogenous ice formation. Volume linear depolarization ratios of 0.3-0.4 (and normalized backscattering ratios higher than 0.9) also confirmed Ci clouds purely composed of ice particles. Their effective radius was within the interval of 9-15 mu m size, and the ice water path ranged from 0.02 (svCi) to 9.9 (opCi) g m(-2). The Cirrus Cloud Radiative Effect (CCRE) was estimated using a Radiative Transfer (RT) model for Ci-free conditions and Ci-mode (Ci presence) scenarios. RT simulations were performed for deriving the CCRE at the top-of-atmosphere (TOA) and on surface (SRF), and also the atmospheric CCRE, for the overall shortwave (SW) range and their spectral sub-intervals (UV, VIS and NIR). A good agreement was first obtained for the RT simulations as validated against solar radiation measurements under clean conditions for solar zenith angles less than 75 degrees (differences were mainly within +/- 20 W m(-2) and correlation coefficients close to 1). By considering all the Ci clouds, independently on their COD, the mean SW CCRE values at TOA and SRF were, respectively, -30 +/- 26 and -24 +/- 19 W m(-2), being the mean atmospheric CCRE of -7 +/- 7 W m(-2); these values are in good agreement with global annual estimates found for Ci clouds. By using linear regression analysis, a Ci-induced enhancing cooling radiative effect was observed as COD increased for all the spectral ranges, with high correlations. In particular, the SW CCRE at TOA and SRF, and the atmospheric CCRE, presented COD-dependent rates of -74 +/- 4, -55 +/- 5, -19 +/- 2 W m(-2) tau(-1), respectively. Additionally, increasing negative rates are found from UV to NIR for each Ci category, reflecting a higher cooling NIR contribution w.r.t. UV and VIS ranges to the SW CCRE, and being also more pronounced at the TOA w.r.t. on SRF, as expected. The contribution of the SW CCRE to the net (SW + LW) radiative balance can be also potentially relevant. These results are especially significant for space-borne photometric/radiometric instrumentation and can contribute to validation purposes of the next ESA's EarthCARE mission, whose principal scientific goal is focused on radiation-aerosol-cloud interaction research.
英文关键词	Cirrus clouds Cloud optical depth Ice water path Micro-pulse lidar Shortwave radiative effects
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000581845700004
WOS关键词	MICRO-PULSE LIDAR ; ICE WATER-CONTENT ; DEPOLARIZATION RATIO ; FORCING PROPERTIES ; MIDLATITUDE SITE ; TECHNICAL NOTE ; SAHARAN DUST ; DESERT DUST ; CLOUD-TYPE ; SOLAR
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327086
作者单位	[Cordoba-Jabonero, Carmen; Gomez-Martin, Laura; Lopez-Cayuela, Maria-Angeles] Inst Nacl Tecn Aeroespacial INTA, Atmospher Res & Instrumentat Branch, Ctra Ajalvir,Km 4, Madrid 28850, Spain; [del Aguila, Ana; Manuel Vilaplana, Jose] Inst Nacl Tecn Aeroespacial INTA, Atmospher Res & Instrumentat Branch, Atmospher Sounding Stn El Arenosillo, Huelva 21130, Spain; [Zorzano, Maria-Paz] Ctr Astrobiol CSIC INTA, Ctra Ajalvir,Km 4, Madrid 28850, Spain; [Zorzano, Maria-Paz] Lulea Univ Technol, Dept Comp Sci Elect & Space Engn, Lulea, Sweden; [del Aguila, Ana] German Aerosp Ctr DLR, Remote Sensing Technol Inst, D-82234 Oberpfaffenhofen, Germany
推荐引用方式 GB/T 7714	Cordoba-Jabonero, Carmen,Gomez-Martin, Laura,del Aguila, Ana,et al. Cirrus-induced shortwave radiative effects depending on their optical and physical properties: Case studies using simulations and measurements[J],2020,246.
APA	Cordoba-Jabonero, Carmen,Gomez-Martin, Laura,del Aguila, Ana,Manuel Vilaplana, Jose,Lopez-Cayuela, Maria-Angeles,&Zorzano, Maria-Paz.(2020).Cirrus-induced shortwave radiative effects depending on their optical and physical properties: Case studies using simulations and measurements.ATMOSPHERIC RESEARCH,246.
MLA	Cordoba-Jabonero, Carmen,et al."Cirrus-induced shortwave radiative effects depending on their optical and physical properties: Case studies using simulations and measurements".ATMOSPHERIC RESEARCH 246(2020).