Aerosol remote sensing in polar regions | |
Tomasi, Claudio1; Kokhanovsky, Alexander A.1; Lupi, Angelo1; Ritter, Christoph1; Smirnov, Alexander1; O'Neill, Norman T.1; Stone, Robert S.1; Holben, Brent N.1; Nyeki, Stephan1; Wehrli, Christoph1 | |
刊名 | EARTH-SCIENCE REVIEWS |
2015 | |
卷号 | 140页码:129-142 |
关键词 | Sun-photometer measurements Aerosol optical thickness Polar aerosol optical characteristics Lidar backscattering coefficient profiles Satellite aerosol remote sensing Multimodal aerosol extinction models |
通讯作者 | Tomasi, C (reprint author), Italian Natl Res Council CNR, Inst Atmospher Sci & Climate ISAC, Climate Change Div, Bologna, Italy. |
英文摘要 | Multi-year sets of ground-based sun-photometer measurements conducted at 12 Arctic sites and 9 Antarctic sites were examined to determine daily mean values of aerosol optical thickness tau(lambda) at visible and near-infrared wavelengths, from which best-fit values of Angstrom's exponent alpha were calculated. Analysing these data, the monthly mean values of tau(0.50 mu m) and alpha and the relative frequency histograms of the daily mean values of both parameters were determined for winter spring and summer autumn in the Arctic and for austral summer in Antarctica. The Arctic and Antarctic covariance plots of the seasonal median values of alpha versus tau(0.50 mu m) showed: (i) a considerable increase in tau(0.50 mu m) for the Arctic aerosol from summer to winter spring, without marked changes in alpha; and (ii) a marked increase in tau(0.50 mu m) passing from the Antarctic Plateau to coastal sites, whereas alpha decreased considerably due to the larger fraction of sea-salt aerosol. Good agreement was found when comparing ground-based sun-photometer measurements of tau(lambda) and alpha at Arctic and Antarctic coastal sites with Microtops measurements conducted during numerous AERONET/MAN cruises from 2006 to 2013 in three Arctic Ocean sectors and in coastal and off-shore regions of the Southern Atlantic, Pacific, and Indian Oceans, and the Antarctic Peninsula. Lidar measurements were also examined to characterise vertical profiles of the aerosol backscattering coefficient measured throughout the year at Ny-Alesund. Satellite-based MODIS, MISR, and AATSR retrievals of tau(lambda) over large parts of the oceanic polar regions during spring and summer were in close agreement with ship-borne and coastal ground-based sun-photometer measurements. An overview of the chemical composition of mode particles is also presented, based on in-situ measurements at Arctic and Antarctic sites. Fourteen log-normal aerosol number size-distributions were defined to represent the average features of nuclei, accumulation and coarse mode particles for Arctic haze, summer background aerosol, Asian dust and boreal forest fire smoke, and for various background austral summer aerosol types at coastal and high-altitude Antarctic sites. The main columnar aerosol optical characteristics were determined for all 14 particle modes, based on in-situ measurements of the scattering and absorption coefficients. Diurnally averaged direct aerosol-induced radiative forcing and efficiency were calculated for a set of multimodal aerosol extinction models, using various Bidirectional Reflectance Distribution Function models over vegetation-covered, oceanic and snow-covered surfaces. These gave a reliable measure of the pronounced effects of aerosols on the radiation balance of the surface-atmosphere system over polar regions. (C) 2014 Elsevier B.V. All rights reserved. |
研究领域[WOS] | Geosciences, Multidisciplinary |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000347863500006 |
内容类型 | 期刊论文 |
源URL | [http://ir.ceode.ac.cn/handle/183411/38526] |
专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
作者单位 | 1.[Tomasi, Claudio 2.Lupi, Angelo 3.Mazzola, Mauro 4.Lanconelli, Christian 5.Vitale, Vito] Italian Natl Res Council CNR, Inst Atmospher Sci & Climate ISAC, Climate Change Div, Bologna, Italy 6.[Kokhanovsky, Alexander A. 7.Istomina, Larysa] Univ Bremen, Inst Environm Phys IUP, D-28359 Bremen, Germany 8.[Kokhanovsky, Alexander A.] EUMETSAT, D-64295 Darmstadt, Germany 9.[Ritter, Christoph] Alfred Wegener Inst Polar & Marine Res, Climate Syst Div, Potsdam, Germany 10.[Smirnov, Alexander] Sigma Space Corp, Lanham, MD USA |
推荐引用方式 GB/T 7714 | Tomasi, Claudio,Kokhanovsky, Alexander A.,Lupi, Angelo,et al. Aerosol remote sensing in polar regions[J]. EARTH-SCIENCE REVIEWS,2015,140:129-142. |
APA | Tomasi, Claudio.,Kokhanovsky, Alexander A..,Lupi, Angelo.,Ritter, Christoph.,Smirnov, Alexander.,...&Piketh, Stuart J..(2015).Aerosol remote sensing in polar regions.EARTH-SCIENCE REVIEWS,140,129-142. |
MLA | Tomasi, Claudio,et al."Aerosol remote sensing in polar regions".EARTH-SCIENCE REVIEWS 140(2015):129-142. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论