Long-term spatiotemporal features of aerosol optical characteristics and relative humidity in China’s offshore areas

Geo-spatial Information Science, Год журнала: 2025, Номер unknown, С. 1 - 18

Опубликована: Янв. 17, 2025

Marine aerosols are crucial for ocean–atmosphere interactions. However, there is a lack of analysis on the long-term aerosol optical characteristics and relative humidity (RH) based large-scale ocean regions. This paper addresses this issue by analyzing spatiotemporal variations in China's offshore waters from 2007 to 2022 using Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observation (CALIPSO) European Centre Medium-range Weather Forecasts Reanalysis v.5 (ERA5) data. The results show that sea area, backscatter coefficient at 532 nm extinction increase with increasing RH; depolarization ratio decreases RH. properties generally lower summer, while they fluctuate rising RH other seasons. Notably, values recorded 2014–2019 were markedly than those 2007–2013. Nevertheless, 2020 2022, proportion types remained largely stable compared 2014–2019, suggesting negligible impact COVID-19 pandemic emissions, but near-shore waters' more sensitive minor changes far-off waters. After dividing waters, overall decreased order Bohai Sea Yellow Sea, East China South due marine toward south. altitude layer within range 0–7 km, higher altitude, less oceanic terrestrial aerosols. rises, alternate downwards. We speculate linked steep decline total content as rises. Our could provide theoretical references further deepening understanding generation mechanisms

Язык: Английский

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Molecular distribution, sources and potential health risks of fine particulate-bound polycyclic aromatic hydrocarbons during high pollution episodes in a subtropical urban city

Chemosphere, Год журнала: 2023, Номер 340, С. 139943 - 139943

Опубликована: Авг. 23, 2023

Язык: Английский

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CALIPSO Overpasses During Three Atmospheric Pollen Events Detected by Hirst-Type Volumetric Samplers in Two Urban Cities in Greece

Atmosphere, Год журнала: 2025, Номер 16(3), С. 317 - 317

Опубликована: Март 10, 2025

Vertically retrieved optical properties by Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) were investigated in the case of three selected events over Athens Thessaloniki with documented high pollen concentrations. Hirst-type volumetric samplers used to detect characterize during CALIPSO overpasses. Only cases a total concentration greater than 400 grains m−3 for at least two hours per day considered severe events, while model simulations exclude presence other depolarizing aerosol types. This study provides mean values lidar-derived inside detected layers; i.e., represent atmosphere pollen, urban cities Greece. Specifically, observed layers, one particulate color ratios 0.652 ± 0.194, 0.638 0.362, 0.456 0.284, depolarization 8.70 6.26%, 28.30 14.16%, 8.96 6.87%, respectively, misclassified as marine-dusty marine, dust, polluted dust. In intense presence, vertical profiles aerobiological monitoring methods may be synergistically better atmospheric layers.

Язык: Английский

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Retrieval uncertainty and consistency of Suomi-NPP VIIRS Deep Blue and Dark Target aerosol products under diverse aerosol loading scenarios over South Asia

Environmental Pollution, Год журнала: 2023, Номер 331, С. 121913 - 121913

Опубликована: Май 27, 2023

Язык: Английский

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Source specific health risks of size-segregated particulate bound metals in an urban environment over northern India

Atmospheric Environment, Год журнала: 2023, Номер 314, С. 120091 - 120091

Опубликована: Сен. 15, 2023

Язык: Английский

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Editorial: Physical and chemical processes within the planetary boundary layer and their impacts on air pollution

Frontiers in Environmental Science, Год журнала: 2023, Номер 11

Опубликована: Май 23, 2023

EDITORIAL article Front. Environ. Sci., 23 May 2023Sec. Atmosphere and Climate Volume 11 - 2023 | https://doi.org/10.3389/fenvs.2023.1221546

Язык: Английский

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Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe

Remote Sensing, Год журнала: 2024, Номер 16(10), С. 1689 - 1689

Опубликована: Май 9, 2024

North Africa, the Middle East, and Europe (NAMEE domain) host a variety of suspended particles characterized by different optical microphysical properties. In current study, we investigate importance lidar ratio (LR) on Cloud-Aerosol Lidar with Orthogonal Polarization–Cloud-Aerosol Infrared Pathfinder Satellite Observations (CALIOP-CALIPSO) aerosol retrievals towards assessing aerosols’ impact Earth-atmosphere radiation budget. A holistic approach has been adopted involving collocated Aerosol Robotic Network (AERONET) observations, Radiative Transfer Model (RTM) simulations, as well reference measurements acquired using spaceborne (Clouds Earth’s Radiant Energy System-CERES) ground-based (Baseline Surface Radiation Network-BSRN) instruments. We are clear-sky shortwave (SW) direct radiative effects (DREs) 550 atmospheric scenes, identified within 2007–2020 period, in which primary tropospheric species (dust, marine, polluted continental/smoke, elevated smoke, clean continental) probed CALIPSO. RTM runs have performed relying CALIOP default DeLiAn (Depolarization ratio, Ångström exponent)-based aerosol-speciated LRs considered. The simulated fields from both configurations compared against those produced when AERONET AODs applied. Overall, leads to better results mainly mineral either solely recorded or coexist other (e.g., sea-salt). quantitative terms, errors DREs reduced ~26–27% at surface (from 5.3 3.9 W/m2) atmosphere −3.3 −2.4 W/m2). improvements become more significant (reaching up ~35%) for moderate-to-high loads (AOD ≥ 0.2).

Язык: Английский

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Sensing aerosols using the Earth Observing System

Elsevier eBooks, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Язык: Английский

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Analysis of Aerosol Types and Vertical Distribution in Seven Typical Cities in East Asia

Atmosphere, Год журнала: 2024, Номер 15(2), С. 195 - 195

Опубликована: Фев. 2, 2024

Identifying the types and vertical distribution of aerosols plays a significant role in evaluating influence on climate system. Based aerosol optical properties obtained from Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observation (CALIPSO), this study analyzed long-term characteristics seven cities East Asia (Ulaanbaatar, Beijing, Lanzhou, Shanghai, Lhasa, Hong Kong, Bangkok) 2007 to 2021, including spatiotemporal variations depth (AOD), stratification aerosols, main subtype. The results showed that, except for AOD values all exhibited trend initially increasing then decreasing over years. Except high other occurred spring summer seasons, while low autumn winter seasons. In four contribution within 1–3 km range accounted more than 50% total. proportion reached 80%. their contributions varied at different altitudes. Overall, dust, polluted continental/smoke, elevated smoke dominated layers across each city. On hand, clean marine, continental, dusty marine had very small proportions, accounting less 5% cities’ layers.

Язык: Английский

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Contrasting nature of aerosols over South Asian cities and its surrounding environment

Environmental Pollution, Год журнала: 2024, Номер 360, С. 124622 - 124622

Опубликована: Июль 29, 2024

Язык: Английский

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