Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-9661-2018 |
Ship-borne aerosol profiling with lidar over the Atlantic Ocean: from pure marine conditions to complex dust-smoke mixtures | |
Bohlmann, Stephanie1,2; Baars, Holger1; Radenz, Martin1; Engelmann, Ronny1; Macke, Andreas1 | |
2018-07-09 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:13页码:9661-9679 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Finland |
英文摘要 | The multi-wavelength Raman lidar Polly(XT) has been regularly operated aboard the research vessel Polarstern on expeditions across the Atlantic Ocean from north to south and vice versa. The lidar measurements of the RV Polarstern cruises PS95 from Bremerhaven, Germany, to Cape Town, Republic of South Africa (November 2015), and PS98 from Punta Arenas, Chile, to Bremerhaven, Germany (April/May 2016), are presented and analysed in detail. The latest set-up of PollyXT allows improved coverage of the marine boundary layer (MBL) due to an additional near-range receiver. Three case studies provide an overview of the aerosol detected over the Atlantic Ocean. In the first case, marine conditions were observed near South Africa on the autumn cruise PS95. Values of optical properties (depolarisation ratios close to zero, lidar ratios of 23 sr at 355 and 532 nm) within the MBL indicate pure marine aerosol. A layer of dried marine aerosol, indicated by an increase of the particle depolarisation ratio to about 10% at 355 nm (9% at 532 nm) and thus confirming the non-sphericity of these particles, could be detected on top of the MBL. On the same cruise, an almost pure Saharan dust plume was observed near the Canary Islands, presented in the second case. The third case deals with several layers of Saharan dust partly mixed with biomass-burning smoke measured on PS98 near the Cabo Verde islands. While the MBL was partly mixed with dust in the pure Saharan dust case, an almost marine MBL was observed in the third case. A statistical analysis showed latitudinal differences in the optical properties within the MBL, caused by the down-mixing of dust in the tropics and anthropogenic influences in the northern latitudes, whereas the optical properties of the MBL in the Southern Hemisphere correlate with typical marine values. The particle depolarisation ratio of dried marine layers ranged between 4 and 9% at 532 nm. Night measurements from PS95 and PS98 were used to illustrate the potential of aerosol classification using lidar ratio, particle depolarisation ratio at 355 and 532 nm, and Angstrom exponent. Lidar ratio and particle depolarisation ratio have been found to be the main indicator for particle type, whereas the Angstrom exponent is rather variable. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000438115500005 |
WOS关键词 | RAMAN LIDAR ; DEPOLARIZATION RATIO ; OPTICAL-PROPERTIES ; SEA-SALT ; BOUNDARY-LAYER ; SAHARAN DUST ; CAPE-VERDE ; POLARIZATION ; BACKSCATTER ; 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/30409 |
专题 | 地球科学 |
作者单位 | 1.Leibniz Inst Tropospher Res, Permoserstr 15, D-04318 Leipzig, Germany; 2.Finnish Meteorol Inst, POB 1627, Kuopio 70211, Finland |
推荐引用方式 GB/T 7714 | Bohlmann, Stephanie,Baars, Holger,Radenz, Martin,et al. Ship-borne aerosol profiling with lidar over the Atlantic Ocean: from pure marine conditions to complex dust-smoke mixtures[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(13):9661-9679. |
APA | Bohlmann, Stephanie,Baars, Holger,Radenz, Martin,Engelmann, Ronny,&Macke, Andreas.(2018).Ship-borne aerosol profiling with lidar over the Atlantic Ocean: from pure marine conditions to complex dust-smoke mixtures.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(13),9661-9679. |
MLA | Bohlmann, Stephanie,et al."Ship-borne aerosol profiling with lidar over the Atlantic Ocean: from pure marine conditions to complex dust-smoke mixtures".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.13(2018):9661-9679. |
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