Nine-year spatial and temporal evolution of desert dust aerosols over South and East Asia as revealed by CALIOP
Emmanouil Proestakis,Vassilis Amiridis,Eleni Marinou,Aristeidis K. Georgoulias,Stavros Solomos,Stelios Kazadzis,Julien Chimot,Huizheng Che,Georgia Alexandri,Ioannis Binietoglou,Vasiliki Daskalopoulou,Konstantinos Kourtidis,Gerrit de Leeuw,Gerrit de Leeuw,Ronald van der A +14 more
TLDR
In this paper, a 3D climatology of the desert dust distribution over South and East Asia derived using CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) data is presented.Abstract:
We present a 3-D climatology of the desert dust distribution over South and East Asia derived using CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) data. To distinguish desert dust from total aerosol load we apply a methodology developed in the framework of EARLINET (European Aerosol Research Lidar Network). The method involves the use of the particle linear depolarization ratio and updated lidar ratio values suitable for Asian dust, applied to multiyear CALIPSO observations (January 2007-December 2015). The resulting dust product provides information on the horizontal and vertical distribution of dust aerosols over South and East Asia along with the seasonal transition of dust transport pathways. Persistent high D-AOD (dust aerosol optical depth) values at 532 nm, of the order of 0.6, are present over the arid and semi-arid desert regions. Dust aerosol transport (range, height and intensity) is subject to high seasonality, with the highest values observed during spring for northern China (Taklimakan and Gobi deserts) and during summer over the Indian subcontinent (Thar Desert). Additionally, we decompose the CALIPSO AOD (aerosol optical depth) into dust and non-dust aerosol components to reveal the nondust AOD over the highly industrialized and densely populated regions of South and East Asia, where the non-dust aerosols yield AOD values of the order of 0.5. Furthermore, the CALIPSO-based short-term AOD and D-AOD time series and trends between January 2007 and December 2015 are calculated over South and East Asia and over selected subregions. Positive trends are observed over northwest and east China and the Indian subcontinent, whereas over southeast China trends are mostly negative. The calculated AOD trends agree well with the trends derived from Aqua MODIS (Moderate Resolution Imaging Spectroradiometer), although significant differences are observed over specific regions.read more
Citations
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Short-term modulation of Indian summer monsoon rainfall by West Asian dust
TL;DR: In this paper, an analysis of satellite data and global climate model simulations suggests that dust aerosol levels over the Arabian Sea, West Asia and the Arabian Peninsula are positively correlated with the intensity of the Indian summer monsoon.
Journal ArticleDOI
Large contribution of meteorological factors to inter-decadal changes in regional aerosol optical depth
Huizheng Che,Ke Gui,Xiangao Xia,Yaqiang Wang,Brent N. Holben,Philippe Goloub,Emilio Cuevas-Agulló,Hong Wang,Yu Zheng,Hujia Zhao,Xiaoye Zhang +10 more
TL;DR: In this paper, the authors used a long-term (1980-2016) aerosol dataset from the Modern-Era Retrospective Analysis for Research andApplications, version 2 (MERRA-2) reanalysis, along with two satellite-based AOD datasets (MODIS/Terra and MISR) from 2001 to 2016, to investigate the longterm trends in global and regional aerosol loading.
Journal ArticleDOI
The Impact of the Control Measures during the COVID-19 Outbreak on Air Pollution in China
TL;DR: The outbreak of the COVID-19 virus in Wuhan, China, in January 2020 just before the Spring Festival and subsequent country-wide measures to contain the virus, effectively resulted in the lock-down of the country, resulting in the reduction of emissions of trace gases and aerosols.
Journal ArticleDOI
Two decades of satellite observations of AOD over mainland China using ATSR-2, AATSR and MODIS/Terra: data set evaluation and large-scale patterns
Gerrit de Leeuw,Larisa Sogacheva,Edith Rodriguez,Konstantinos Kourtidis,Aristeidis K. Georgoulias,Georgia Alexandri,Vassilis Amiridis,Emmanouil Proestakis,Eleni Marinou,Yong Xue,Ronald van der A +10 more
TL;DR: In this article, the authors used information from different types of satellite-based instruments to provide a 3-D climatology of aerosol properties over mainland China, including vertical profiles of extinction coefficients from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite and the columnintegrated extinction (aerosol optical depth) from three radiometers.
Journal ArticleDOI
Improved aerosol correction for OMI tropospheric NO2 retrieval over East Asia : Constraint from CALIOP aerosol vertical profile
Mengyao Liu,Mengyao Liu,Jintai Lin,K. Folkert Boersma,K. Folkert Boersma,Gaia Pinardi,Yang Wang,Julien Chimot,Thomas Wagner,Pinhua Xie,Pinhua Xie,Henk Eskes,Michel Van Roozendael,François Hendrick,Pucai Wang,Ting Wang,Yingying Yan,Lulu Chen,Ruijing Ni +18 more
TL;DR: POMINO v1.1 as discussed by the authors uses GEOS-Chem simulations with additional monthly constraints by MODIS/Aqua aerosol optical depth (AOD) data to constrain the modeled aerosol vertical profiles, which results in small changes in retrieved cloud fraction, increases in cloud-top pressure, and increases in tropospheric NO2 VCD by 4'% to 16'% over China on a monthly basis in 2012.
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