Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.2324551 |
Using a CCD camera lidar system for detection of Asian dust | |
Butt, Jalal1; Oville, Chris1; Sharma, Nimmi C. P.1; Barnes, John E.2,3 | |
通讯作者 | Butt, Jalal |
会议名称 | Conference on Lidar Remote Sensing for Environmental Monitoring XVI |
会议日期 | SEP 24-25, 2018 |
会议地点 | Honolulu, HI |
英文摘要 | During intense spring and early summer storms, substantial volumes of dust from east Asian desert regions are lofted over the continent and transported by prevailing winds across the Pacific Ocean. The phenomenon has wide reaching effects including long range nutrient and sediment transport as well as radiative forcing. Mauna Loa Observatory (MLO) is an atmospheric baseline station in Hawaii at an altitude of 3397-m.a.s.l.. MLO's CCD Camera Lidar (CLidar) has fine near-ground altitude resolution, which makes it a useful system for Asian dust detection, especially at high altitude sites such as MLO. A 20-Watt, 532-nm Nd:YAG laser was vertically transmitted into the atmosphere above MLO. The side-scatter from atmospheric constituents, such as clouds, aerosols, and air molecules was detected by a wide-angle CCD camera situated 139-m from the laser. The obtained signal was range-normalized using a molecular scattering model and corrected for transmission with a column-averaged aerosol phase function derived from MLO-based AERONET photometer measurements. In several of the resulting aerosol extinction profiles, notable aerosol layers were observed near altitude ranges in which Asian dust is typically transported by prevailing winds. Corresponding relative humidity measurements made by nearby radiosondes were examined to differentiate aerosol scattering from cloud scattering. To further examine layers exhibiting both aerosol extinction peaks and relative humidity levels below that of tenuous ice clouds, back trajectories were conducted using NOAA's Hybrid Single Particle Lagrangian Integrated Trajectory model. Several layers from 2008 and 2009 were traced back to East Asian deserts. |
英文关键词 | Asian dust dust transport Mauna Loa Observatory CCD camera lidar CLidar East Asian deserts Asian dust detection dust detection |
来源出版物 | LIDAR REMOTE SENSING FOR ENVIRONMENTAL MONITORING XVI |
ISSN | 0277-786X |
EISSN | 1996-756X |
出版年 | 2018 |
卷号 | 10779 |
EISBN | 978-1-5106-2134-3 |
出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S |
WOS记录号 | WOS:000459651300020 |
WOS关键词 | RELATIVE-HUMIDITY ; BOUNDARY-LAYER ; TRANSPORT ; CLOUDS ; EVENT |
WOS类目 | Environmental Sciences ; Remote Sensing |
WOS研究方向 | Environmental Sciences & Ecology ; Remote Sensing |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/307873 |
作者单位 | 1.Cent Connecticut State Univ, Dept Phys & Engn Phys, New Britain, CT 06053 USA; 2.Univ Colorado, CIRES, Boulder, CO 80309 USA; 3.NOAA, Earth Syst Res Lab, GMD, Boulder, CO 80305 USA |
推荐引用方式 GB/T 7714 | Butt, Jalal,Oville, Chris,Sharma, Nimmi C. P.,et al. Using a CCD camera lidar system for detection of Asian dust[C]:SPIE-INT SOC OPTICAL ENGINEERING,2018. |
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