Investigation of black carbon climate effects in the Arctic in winter and spring

Chen, Xintong; Kang, Shichang; Yang, Junhua; Ji, Zhenming

doi:10.1016/j.scitotenv.2020.142145

Cited by 13 publications

(2 citation statements)

References 74 publications

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“…We applied the WRF-Chem (v3.9.1) model-which has been widely used in early studies [13][14][15]-to quantitatively investigate the impact of decreasing PM 2.5 on the physical properties of the regional atmospheric environment (including changes in SWDOWN, PBLH, and concentration of air pollutants) in summer (June) over NCP. Then, a two-level nested modeling domain was configured in this study (Figure 1).…”

Section: Model Configurationmentioning

confidence: 99%

The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015–2019

Wei

Cai

et al. 2022

Sustainability

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Great changes occurred in the physical and chemical properties of the atmosphere in the North China Plain (NCP) in summer caused by PM2.5 dropping from 58 μg/m3 in 2015 to 36.0 μg/m3 in 2019. In this study, we first applied the WRF-Chem model to quantify the impact of PM2.5 reduction on shortwave radiation reaching the ground (SWDOWN), planetary boundary layer height (PBLH), and the surface concentration of air pollutants (represented by CO). Simulation results obtained an increase of 15.0% in daytime SWDOWN and 9.9% in daytime PBLH, and a decrease of −5.0% in daytime CO concentration. These changes were induced by the varied PM2.5 levels. Moreover, the variation in SWDOWN further led to a rise in the NO2 photolysis rate (JNO2) over this region, by 1.82 × 10−4~1.91 × 10−4 s−1 per year. Afterwards, we employed MCM chemical box model to explore how the JNO2 increase and the precursor decrease (CO, VOCs, and NOx) influenced O3 and HOx radicals. The results revealed that the photolysis rate (J) increase would individually cause a change on daytime surface O3, OH, and HO2 radicals by +9.0%, +18.9%, and +23.7%; the corresponding change induced by the precursor decrease was −2.5%, +1.9%, and −2.3%. At the same time, the integrated impacts of the change in J and precursors cause an increase of +6.3%, +21.1%, and +20.9% for daytime surface O3, OH, and HO2. Generally, the atmospheric oxidation capacity significantly enhanced during summer in NCP due to the PM2.5 dropping in recent years. This research can help understand atmosphere changes caused by PM2.5 reduction comprehensively.

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Section: Model Configurationmentioning

confidence: 99%

The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015–2019

Wei

Cai

et al. 2022

Sustainability

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“…Ground-based aerosol observations are sparse, and aerosol data from passive satellite instruments are unavailable during polar night (Duncan et al, 2020). Long-term, vertically resolved remote-sensing information on Arctic aerosols, including aerosol subtype distributions from dust, smoke, and other sources, is available from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite (Di Pierro et al, 2013;Winker et al, 2013;Kim et al, 2018;Yang et al, 2021;Chen et al, 2021). However, CALIPSO can miss aerosols that are (a) dilute (Kacenelenbogen et al, 2014;Zamora et al, 2017;Di Pierro et al, 2013;Winker et al, 2013;Rogers et al, 2014); (b) very small (Hallen and Philbrick, 2018), including highly numerous marine biogenic aerosols (Burkart et al, 2017); (c) in the 200 m immediately above the surface where local marine and terrestrial emission concentrations are highest (Winker et al, 2013); and (d) below clouds.…”

Section: Introductionmentioning

confidence: 99%

Comparisons between the distributions of dust and combustion aerosols in MERRA-2, FLEXPART, and CALIPSO and implications for deposition freezing over wintertime Siberia

et al. 2022

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Abstract. Aerosol distributions have a potentially large influence on climate-relevant cloud properties but can be difficult to observe over the Arctic given pervasive cloudiness, long polar nights, data paucity over remote regions, and periodic diamond dust events that satellites can misclassify as aerosol. We compared Arctic 2008–2015 mineral dust and combustion aerosol distributions from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite, the Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) reanalysis products, and the FLEXible PARTicle (FLEXPART) dispersion model. Based on coincident, seasonal Atmospheric Infrared Sounder (AIRS) Arctic satellite meteorological data, diamond dust may occur up to 60 % of the time in winter, but it hardly ever occurs in summer. In its absence, MERRA-2 and FLEXPART each predict the vertical and horizontal distribution of large-scale patterns in combustion aerosols with relatively high confidence (Kendall tau rank correlation > 0.6), although a sizable amount of variability is still unaccounted for. They do the same for dust, except in conditions conducive to diamond dust formation where CALIPSO is likely misclassifying diamond dust as mineral dust and near the surface (< ∼ 2 km) where FLEXPART may be overpredicting local dust emissions. Comparisons to ground data suggest that MERRA-2 Arctic dust concentrations can be improved by the addition of local dust sources. All three products predicted that wintertime dust and combustion aerosols occur most frequently over the same Siberian regions where diamond dust is most common in the winter. This suggests that dust aerosol impacts on ice phase processes may be particularly high over Siberia, although further wintertime model validation with non-CALIPSO observations is needed. This assessment paves the way for applying the model-based aerosol simulations to a range of regional-scale Arctic aerosol–cloud interaction studies with greater confidence.

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Black Carbon Size in Snow of Chinese Altai Mountain in Central Asia

et al. 2023

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Investigation of black carbon climate effects in the Arctic in winter and spring

Cited by 13 publications

References 74 publications

The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015–2019

The Independent Impacts of PM2.5 Dropping on the Physical and Chemical Properties of Atmosphere over North China Plain in Summer during 2015–2019

Comparisons between the distributions of dust and combustion aerosols in MERRA-2, FLEXPART, and CALIPSO and implications for deposition freezing over wintertime Siberia

Black Carbon Size in Snow of Chinese Altai Mountain in Central Asia

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