globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2018.03.062
Scopus记录号: 2-s2.0-85044971915
论文题名:
Analysis of spatial-temporal heterogeneity in remotely sensed aerosol properties observed during 2005–2015 over three countries along the Gulf of Guinea Coast in Southern West Africa
作者: Aklesso M; , Kumar K; R; , Bu L; , Boiyo R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 182
起始页码: 313
结束页码: 324
语种: 英语
英文关键词: AOD ; Harmattan season ; HYSPLIT ; MODIS ; Southern West Africa
Scopus关键词: Atmospheric aerosols ; Radiometers ; Satellite imagery ; Ultraviolet spectrometers ; Back trajectory analysis ; Harmattan season ; HYSPLIT ; Moderate resolution imaging spectroradiometer ; MODIS ; Ozone monitoring instruments ; Spatial-temporal distribution ; West Africa ; Optical properties ; absorption ; aerosol ; analytical method ; heterogeneity ; instrumentation ; MODIS ; optical property ; spatiotemporal analysis ; absorption ; aerosol ; air monitoring ; air pollutant ; Article ; Atlantic Ocean ; Benin ; climate change ; desert ; dust ; Ghana ; global climate ; Guinea ; Nigeria ; optical depth ; precipitation ; priority journal ; remote sensing ; seashore ; seasonal variation ; spatiotemporal analysis ; summer ; Togo ; vegetation ; Africa ; Atlantic Ocean ; Benin [West Africa] ; Ghana ; Gulf of Guinea ; Togo
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: In the present study, the spatial-temporal distribution and estimation of trends of different aerosol optical properties, and related impact factors were investigated over three countries: Ghana, Togo, and Benin along the Gulf of Guinea Coast in Southern West Africa (SWA). For this purpose, long-term satellite derived aerosol optical properties (aerosol optical depth at 550 nm; AOD550, Ångström exponent at 470–660 nm; AE470-660, and absorption aerosol index; AAI) retrieved from the Moderate-resolution Imaging Spectroradiometer (MODIS) and Ozone Monitoring Instrument (OMI) during January 2005–December 2015 were utilized. The annual mean spatial distribution of AOD550 was found to be high (>0.55) over the southern coastal area, moderate-to-high (0.35–0.55) over the central, and low (<0.35) over northern parts of the study domain. The seasonal mean variations showed high (low) values of AOD550 and AAI during the Harmattan or dry (wet) season. Whereas, low (high) AE470-660 values were characterized during the Harmattan (wet) season. Linear trend analysis revealed a decreasing trend in AOD550 and AAI, and increasing trend in AE470-660. Further, an investigation on the potential drivers to AOD distribution over the SWA revealed that precipitation, NDVI, and terrain were negatively correlated with AOD. Finally, the HYSPLIT derived back trajectory analyses revealed diverse transport pathways originated from the North Atlantic Ocean, Sahara Desert, and Nigeria along with locally generated aerosols. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82864
Appears in Collections:气候变化事实与影响

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作者单位: Collaborative Innovation Centre on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), International Joint Laboratory on Climate and Environment Change (ILCEC), Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Togo National Meteorological Authority, P.O.Box: 1505, Lome, Togo; Department of Physical Sciences, Meru University of Science and Technology, P.O. Box 972-60200, Meru, Kenya

Recommended Citation:
Aklesso M,, Kumar K,R,et al. Analysis of spatial-temporal heterogeneity in remotely sensed aerosol properties observed during 2005–2015 over three countries along the Gulf of Guinea Coast in Southern West Africa[J]. Atmospheric Environment,2018-01-01,182
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