Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-8599-2017 |
Lidar ratios of stratospheric volcanic ash and sulfate aerosols retrieved from CALIOP measurements | |
Prata, Andrew T.1; Young, Stuart A.2; Siems, Steven T.1; Manton, Michael J.1 | |
2017-07-14 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | We apply a two-way transmittance constraint to nighttime CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) observations of volcanic aerosol layers to retrieve estimates of the particulate lidar ratio (S-p) at 532 nm. This technique is applied to three volcanic eruption case studies that were found to have injected aerosols directly into the stratosphere. Numerous lidar observations permitted characterization of the optical and geometric properties of the volcanic aerosol layers over a time period of 1-2 weeks. For the volcanic ash-rich layers produced by the Puyehue-Cordon Caulle eruption (June 2011), we obtain mean and median particulate lidar ratios of 69 +/- 13 sr and 67 sr, respectively. For the sulfate-rich aerosol layers produced by Kasatochi (August 2008) and Sarychev Peak (June 2009), the means of the retrieved lidar ratios were 66 +/- 19 sr (median 60 sr) and 63 +/- 14 sr (median 59 sr), respectively. The 532 nm layer-integrated particulate depolarization ratios (delta(p)) observed for the Puyehue layers (delta(p) = 0.33 +/- 0.03) were much larger than those found for the volcanic aerosol layers produced by the Kasatochi (delta(p) = 0.09 +/- 0.03) and Sarychev (delta(p) = 0.05 +/- 0.04) eruptions. However, for the Sarychev layers we observe an exponential decay (e-folding time of 3.6 days) in delta p with time from 0.27 to 0.03. Similar decreases in the layer-integrated attenuated colour ratios with time were observed for the Sarychev case. In general, the Puyehue layers exhibited larger colour ratios (chi ' 0 = 0.53 +/- 0.07) than what was observed for the Kasatochi (chi ' 0 = 0.35 +/- 0.07) and Sarychev (chi ' 0 = 0.32 +/- 0.07) layers, indicating that the Puyehue layers were generally composed of larger particles. These observations are particularly relevant to the new strato-spheric aerosol subtyping classification scheme, which has been incorporated into version 4 of the level 2 CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) data products. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405466900002 |
WOS关键词 | PUYEHUE-CORDON CAULLE ; CALIPSO LIDAR ; OPTICAL DEPTHS ; A-TRAIN ; CLOUD ; ALGORITHM ; ERUPTIONS ; MISSION ; TEMPERATURE ; EXTINCTION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/26214 |
专题 | 地球科学 |
作者单位 | 1.Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic 3800, Australia; 2.CSIRO Oceans & Atmosphere, Aspendale, Vic 3195, Australia |
推荐引用方式 GB/T 7714 | Prata, Andrew T.,Young, Stuart A.,Siems, Steven T.,et al. Lidar ratios of stratospheric volcanic ash and sulfate aerosols retrieved from CALIOP measurements[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(13). |
APA | Prata, Andrew T.,Young, Stuart A.,Siems, Steven T.,&Manton, Michael J..(2017).Lidar ratios of stratospheric volcanic ash and sulfate aerosols retrieved from CALIOP measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(13). |
MLA | Prata, Andrew T.,et al."Lidar ratios of stratospheric volcanic ash and sulfate aerosols retrieved from CALIOP measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.13(2017). |
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