Aerosol climatology characterization over Bangladesh using ground-based and remotely sensed satellite measurements DOI Creative Commons
Shahid Uz Zaman,

Md Riad Sarkar Pavel,

Rumana Islam Rani

et al.

Elementa Science of the Anthropocene, Journal Year: 2022, Volume and Issue: 10(1)

Published: Jan. 1, 2022

Atmospheric aerosols affect human health, alter cloud optical properties, influence the climate and radiative balance, contribute to cooling of atmosphere. Aerosol climatology based on aerosol robotic network (AERONET) ozone monitoring instrument (OMI) data from two locations (Urban Dhaka coastal Bhola Island) over Bangladesh was conducted for 8 years (2012–2019), focusing characterization schemes. Four parameters, such as extinction angstrom exponent (EAE), absorption AE (AAE), single scattering albedo (SSA), real refractive index (RRI), were exclusively discussed determine types aerosol. In addition, light properties inspected tagging association between size parameters similar fine mode fraction (FMF), AE, (SSA AAE). Results depth (AAOD) validated with satellite-borne cloud–aerosol lidar infrared pathfinder satellite observation (CALIPSO) subtype profiles. The overall average values AAOD (0.110 ± 0.002) [0.106, 0.114] (0.075 0.001) [0.073, 0.078], respectively. derived by OMI (0.024 0.001 [0.023, 0.025] Dhaka, 0.023 0.024] Bhola). Two potentially identified, example, biomass burning urban/industrial insignificant contribution dust Black carbon (BC) prominent absorbing (45.9%–89.1%) in all seasons negligible contributions mixed BC and/or alone. Correlations FMF SSA confirmed that dominant type Bhola. CALIPSO’s vertical information consistent AERONET column information. results will have a substantial impact forcing, modeling well air quality management Southeast Asia’s heavily polluted territories.

Language: Английский

Air pollution scenario over Pakistan: Characterization and ranking of extremely polluted cities using long-term concentrations of aerosols and trace gases DOI
Muhammad Bilal, Alaa Mhawish, Janet E. Nichol

et al.

Remote Sensing of Environment, Journal Year: 2021, Volume and Issue: 264, P. 112617 - 112617

Published: July 27, 2021

Language: Английский

Citations

111
Accuracy assessment of CAMS and MERRA-2 reanalysis PM2.5 and PM10 concentrations over China DOI Creative Commons
Md. Arfan Ali, Muhammad Bilal, Yu Wang

et al.

Atmospheric Environment, Journal Year: 2022, Volume and Issue: 288, P. 119297 - 119297

Published: Aug. 2, 2022

Language: Английский

Citations

52
Long-term spatiotemporal trends in aerosol optical depth and its relationship with enhanced vegetation index and meteorological parameters over South Asia DOI
Salman Tariq, Fazzal Qayyum, Zia ul Haq

et al.

Environmental Science and Pollution Research, Journal Year: 2022, Volume and Issue: 29(20), P. 30638 - 30655

Published: Jan. 7, 2022

Language: Английский

Citations

45
Cloud-based storage and computing for remote sensing big data: a technical review DOI Creative Commons
Chen Xu, Xiaoping Du,

Xiangtao Fan

et al.

International Journal of Digital Earth, Journal Year: 2022, Volume and Issue: 15(1), P. 1417 - 1445

Published: Aug. 24, 2022

The rapid growth of remote sensing big data (RSBD) has attracted considerable attention from both academia and industry. Despite the progress computer technologies, conventional computing implementations have become technically inefficient for processing RSBD. Cloud is effective in activating mining large-scale heterogeneous been widely applied to RSBD over past years. This study performs a technical review cloud-based storage an interdisciplinary viewpoint science. First, we elaborate on four critical challenges resulting scale expansion applications, i.e. raster storage, metadata management, homogeneity, paradigms. Second, introduce state-of-the-art management technologies storage. unit manipulating evolved due use novel which name model. Four models are suggested, scenes, ARD, cubes, composite layers. Third, summarize recent research application various parallel implementations. Finally, categorize architectures mainstream platforms. provides comprehensive fundamental issues experts researchers.

Language: Английский

Citations

44
Long-term PM2.5 pollution over China: Identification of PM2.5 pollution hotspots and source contributions DOI
Md. Arfan Ali, Zhongwei Huang, Muhammad Bilal

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 893, P. 164871 - 164871

Published: June 16, 2023

Language: Английский

Citations

35
Long-term three-dimensional distribution and transport of Saharan dust: Observation from CALIPSO, MODIS, and reanalysis data DOI Creative Commons
Abou Bakr Merdji, Chunsong Lu, Xiaofeng Xu

et al.

Atmospheric Research, Journal Year: 2023, Volume and Issue: 286, P. 106658 - 106658

Published: Feb. 13, 2023

Language: Английский

Citations

24
Evaluation of WRF-Chem-simulated meteorology and aerosols over northern India during the severe pollution episode of 2016 DOI Creative Commons
Prerita Agarwal, David S. Stevenson, Mathew R. Heal

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(4), P. 2239 - 2266

Published: Feb. 22, 2024

Abstract. We use a state-of-the-art regional chemistry transport model (WRF-Chem v4.2.1) to simulate particulate air pollution over northern India during September–November 2016. This period includes severe episode marked by exceedingly high levels of hourly PM2.5 (particulate matter having an aerodynamic diameter ≤ 2.5 µm) 30 October 7 November, particularly the wider Indo-Gangetic Plain (IGP). provide comprehensive evaluation simulated seasonal meteorology (nudged ERA5 reanalysis products) and aerosol (PM2.5 its black carbon (BC) component) using range ground-based, satellite products, with focus on November 2016 haze episode. find daily diurnal features in surface temperature show best agreement followed relative humidity, largest discrepancies being overestimate night-time wind speeds (up 1.5 m s−1) confirmed both ground radiosonde observations. Upper-air comparisons observations excellent skill reproducing vertical gradient (r>0.9). evaluate modelled at 20 observation sites across IGP including eight Delhi compare optical depth (AOD) data from four AERONET sites. also our results MERRA-2 fields MODIS AOD. that captures many observed distributions but tends September (by factor 2) due too much dust, underestimate peak experiences some highest mean concentrations within study region, dominant components nitrate (∼25 %), dust secondary organic aerosols (∼20 %) ammonium (∼10 %). Modelled BC spatially correlate well products whole domain. High AOD 550nm is predicted (r≥0.8) ground-based (r≥0.7), except September. Overall, realistically spatial variations ambient India. However, underestimations pollutant likely come combination underestimated emissions, dispersion, missing or poorly represented processes. Nevertheless, we sufficiently accurate be useful tool for exploring sources processes control episodes.

Language: Английский

Citations

12
Identification of ozone sensitivity for NO2 and secondary HCHO based on MAX-DOAS measurements in northeast China DOI Creative Commons

Jiexiao Xue,

Ting Zhao, Yifu Luo

et al.

Environment International, Journal Year: 2021, Volume and Issue: 160, P. 107048 - 107048

Published: Dec. 24, 2021

In this study, tropospheric formaldehyde (HCHO) vertical column densities (VCDs) were measured using multi-axis differential optical absorption spectroscopy (MAX-DOAS) from January to November 2019 in Shenyang, Northeast China. The maximum HCHO VCD value appeared the summer (1.74 × 1016 molec/cm2), due increased photo-oxidation of volatile organic compounds (VOCs). concentrations 08:00 and peaked near 13:00, which was mainly attributed release isoprene plants enhanced photolysis at noon. VCDs observed by MAX-DOAS OMI have a good correlation coefficient (R) 0.78, contributions primary secondary sources distinguished multi-linear regression model. anthropogenic emissions showed unobvious seasonal variations, relatively stable Shenyang. Secondary contributed 82.62%, 83.90%, 78.90%, 41.53% total ambient during winter, spring, summer, autumn, respectively. We also found (R = 0.78) between vegetation index (EVI) VCDs, indicating that oxidation biogenic (BVOCs) main source HCHO. ratio nitrogen dioxide (NO2) used as tracer analyze O3-NOx-VOC sensitivities. VOC-limited, VOC-NOx-limited, NOx-limited regimes made up 93.67%, 6.23%, 0.11% overall measurements, addition, summertime ozone (O3) sensitivity changed VOC-limited morning VOC-NOx-limited afternoon. Therefore, study offers information on corresponding O3 production sensitivities support strategic management decisions.

Language: Английский

Citations

44
An assessment of various potentially toxic elements and associated health risks in agricultural soil along the middle Gangetic basin, India DOI
Nidhi Tyagi, Munish Kumar Upadhyay,

Arnab Majumdar

et al.

Chemosphere, Journal Year: 2022, Volume and Issue: 300, P. 134433 - 134433

Published: April 4, 2022

Language: Английский

Citations

34
A comprehensive reappraisal of long-term aerosol characteristics, trends, and variability in Asia DOI Creative Commons
Shikuan Jin, Yingying Ma, Zhongwei Huang

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(14), P. 8187 - 8210

Published: July 24, 2023

Abstract. Changes in aerosol loadings and properties are important for the understanding of atmospheric environment climate change. This study investigates characteristics long-term trends aerosols different sizes types Asia from 2000 to 2020 by considering multi-source data novel analysis methods perspectives, all which provides groundwork promoting acquisition new discoveries that past. The geometric mean aggregation method is applied, serial autocorrelation considered avoid overestimation trend significance. Among regions Asia, high values optical depth (AOD) mainly concentrated East (EA) South (SA) closely related population density. AOD EA showed most significant negative trend, with a value -5.28×10-4 per year, owing decreases organic carbon (OC), black (BC), dust aerosols. It also worth noting this observed large-scale decrease OC BC unique phenomenon region around China. In contrast, concentrations SA generally show positive an increased 1.25 × 10−3 year. increase due large emissions fine-mode aerosols, such as sulfate aerosol. Additionally, loading northern has lower variability when compared China Plain, revealing relatively more persistent air pollution situation. Over whole percentage changes seen increases (6.23 %) (17.09 AOD, together (−5.51 %), (−3.07 sea salt (−9.80 AOD. Except anthropogenic emissions, wildfires found summer, whereas differently sized only shows slight small-sized (−3.34 total did not suggests that, perspective, recent years have mostly been offsetting earlier over Asia. To summarize, above findings analyse comprehensive distributions reappraise parameters, will greatly enhance regional global climatology, addition filling gaps breaking through limitations past knowledge.

Language: Английский

Citations

21