Contribution of local and remote anthropogenic aerosols to a record-breaking torrential rainfall event in Guangdong Province, China DOI Creative Commons
Zhen Liu, Yi Ming, Chun Zhao

et al.

Atmospheric chemistry and physics, Journal Year: 2020, Volume and Issue: 20(1), P. 223 - 241

Published: Jan. 6, 2020

Abstract. A torrential rainfall case, which happened in Guangdong Province during 14–16 December 2013, broke the historical record province terms of duration, affected area, and accumulative precipitation. The influence anthropogenic aerosols on this extreme event is examined using a coupled meteorology–chemistry–aerosol model. Up to 33.7 mm precipitation enhancement estuary near coast mainly attributed aerosol–cloud interactions (ACI), whereas aerosol–radiation interaction partially offsets 14 % increase. Our further analysis changes hydrometeors latent heat sources suggests that ACI effects intensification can be divided into two stages: cold rain former stage followed by warm latter. Responses aerosol concentration from local (i.e., Province) remote outside are also investigated through simulations with reduced emissions either or sources. Accumulated aggregates ground surface dilutes quickly after initiated. By contrast, extend up 8 km above last much longer before decreasing until peak begins, because continuously transported strong northerly winds. patterns response concentrations resemble each other. However, compared enhancement, contribute more than twice increase intensifying both rain, occupying predominant role. 10-time emission sensitivity test shows about 10 times PM2.5 control run. Cold (warm) drastically enhanced (suppressed) 10× In emissions, pattern cloud property resembles differences between CTL CLEAN, but greater magnitude. average over decreases 1.0 run increases 1.4 CLEAN We note concentrated within narrowed downstream region source, decrease dispersed across upstream region. This indicates excessive not only suppress rainfall, change spatial distribution precipitation, increasing range, thereby potentially exacerbating flood drought elsewhere. study highlights importance considering meteorology improve weather forecasting. Furthermore, may outweigh those convective invigoration effect.

Language: Английский

Radiative absorption enhancement of dust mixed with anthropogenic pollution over East Asia DOI Creative Commons
Pengfei Tian, Lei Zhang, Jianmin Ma

et al.

Atmospheric chemistry and physics, Journal Year: 2018, Volume and Issue: 18(11), P. 7815 - 7825

Published: June 4, 2018

Abstract. The particle mixing state plays a significant yet poorly quantified role in aerosol radiative forcing, especially for the of dust (mineral absorbing) and anthropogenic pollution (black carbon over East Asia. We have investigated absorption enhancement mixed-type aerosols Asia by using Aerosol Robotic Network observations transfer model calculations. exhibit significantly enhanced absorbing ability than corresponding unmixed aerosols, as revealed spectral behavior optical depth, single scattering albedo, imaginary refractive index. efficiencies dust, mixed-type, are −101.0, −112.9, −98.3 Wm-2τ-1 at bottom atmosphere (BOA); −42.3, −22.5, −39.8 top (TOA); 58.7, 90.3, 58.5 (ATM), respectively. BOA cooling ATM heating higher those types region, resulting atmospheric stabilization. In addition, correspond to lower TOA efficiency, indicating that effect individual components is partially counteracted. conclude interaction between not only represents viable formation pathway but also results unfavorable dispersion conditions, both exacerbating regional air Our highlight necessity accurately account models order better understand mechanism assess its impacts on human health, weather, climate.

Language: Английский

Citations

78
Impact of Arctic amplification on declining spring dust events in East Asia DOI Creative Commons
Jun Liu, Dongyou Wu,

Guangjing Liu

et al.

Climate Dynamics, Journal Year: 2019, Volume and Issue: 54(3-4), P. 1913 - 1935

Published: Dec. 26, 2019

Abstract Dust aerosols play key roles in affecting regional and global climate through their direct, indirect, semi-direct effects. events have decreased rapidly since the 1980s East Asia, particularly over northern China, primarily because of changes meteorological parameters (e.g. surface wind speed precipitation). In this study, we found that winter (December–January–February) Arctic amplification associated with weakened temperature gradients along zonal winds is responsible for large decline following spring (March–April–May) dust event occurrences China mid-1980s. A index was developed by combining daily frequency three types (dust storm, blowing dust, floating dust). Using empirical orthogonal function (EOF) analysis, first pattern obtained anomalies, which accounts 56.2% variability during 1961–2014. Moreover, enhanced stronger Northern Hemisphere annular mode (NAM) can result anticyclonic anomalies Siberia Mongolia, while cyclonic Europe spring. These results are significantly correlated gradients, increased precipitation soil moisture, snow cover extent mid-latitude Hemisphere. Based on future predictions from Fifth Climate Models Intercomparison Project (CMIP5), may continually decrease due to climate.

Language: Английский

Citations

70
Climatology of Asian dust activation and transport potential based on MISR satellite observations and trajectory analysis DOI Creative Commons
Yan Yu, О. В. Калашникова, M. J. Garay

et al.

Atmospheric chemistry and physics, Journal Year: 2019, Volume and Issue: 19(1), P. 363 - 378

Published: Jan. 11, 2019

Abstract. Asian dust, primarily emitted from the Taklamakan and Gobi deserts, has been reported to reach remote destinations, such as North America. However, relative contribution of deserts dust loadings through long-range transport remains unaddressed in any observational study. Here, climatology activation potential for is investigated using stereo observations sources Multi-angle Imaging SpectroRadiometer (MISR) instrument combined with observation-initiated trajectory modeling. MISR-derived plume top height motion vectors confirm peak spring over Desert both summer Desert. The patterns including influence on America trans-Pacific transport, are assessed extensive forward trajectories initiated by MISR observations. analysis reveals latitude-dependent spread dominantly affecting south 50∘ N north exhibit substantial seasonal interannual variability, motivating future studies drivers.

Language: Английский

Citations

67
Aerosol vertical distribution and sources estimation at a site of the Yangtze River Delta region of China DOI Creative Commons
Wenzhi Fan, Kai Qin, Jian Xu

et al.

Atmospheric Research, Journal Year: 2018, Volume and Issue: 217, P. 128 - 136

Published: Nov. 5, 2018

Language: Английский

Citations

66
Establishment of Conceptual Schemas of Surface Synoptic Meteorological Situations Affecting Fine Particulate Pollution Across Eastern China in the Winter DOI
Xuewei Hou, Bin Zhu, Kanike Raghavendra Kumar

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2020, Volume and Issue: 125(23)

Published: Oct. 31, 2020

Abstract In the present study, characteristics of weather conditions and local meteorological variables over Beijing‐Tianjin‐Hebei (BTH) Yangtze River Delta (YRD) regions in winter are analyzed using principal component analysis (PCA) method daily PM 2.5 accumulation rate. Typical synoptic patterns China can be classified into four types. During Type 1 pattern, is under influence Siberian High, northerly winds prevail; this situation beneficial to transport pollutants from north south. However, when High weak, southerly prevail which may result south north. The 2 pattern refers a weak high pressure located BTH resulting pollutants. 3 an intense cold moves affects northern areas China. associated front brings heavy precipitation YRD wet deposition pollution. 4 condition, blocked by northeast vortex towards south, causing pollution YRD. PCA model shows that there two pathways for area: one Shandong during Types (Types 3) situations other central provinces 4).

Language: Английский

Citations

65
Sources, frequency, and chemical nature of dust events impacting the United States East Coast DOI
Abdulmonam M. Aldhaif, David Humberto Lopez, Hossein Dadashazar

et al.

Atmospheric Environment, Journal Year: 2020, Volume and Issue: 231, P. 117456 - 117456

Published: April 5, 2020

Language: Английский

Citations

63
Black Carbon Amplifies Haze Over the North China Plain by Weakening the East Asian Winter Monsoon DOI Creative Commons

Sijia Lou,

Yang Yang, Hailong Wang

et al.

Geophysical Research Letters, Journal Year: 2018, Volume and Issue: 46(1), P. 452 - 460

Published: Dec. 18, 2018

Abstract Black carbon (BC) has previously been found to intensify haze in China by stabilizing the planetary boundary layer. With ocean, sea ice, and cloud feedbacks included a global aerosol‐climate model, we show that BC emitted from North Plain can be transported oceans, which turn changes structure land‐sea thermal contrast. As result, East Asian winter monsoon wind speeds decrease over Plain. This causes air stagnation further haze. Our results suggest addition local BC‐induced interactions between aerosol layer, also amplify weakening through feedbacks. It implies reducing emissions could have significant indirect benefits for quality

Language: Английский

Citations

62
Climatology of Dust‐Forced Radiative Heating Over the Tibetan Plateau and Its Surroundings DOI
Tianhe Wang, Ying Han, Jianping Huang

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2020, Volume and Issue: 125(17)

Published: Aug. 4, 2020

Abstract Dust aerosol can affect the atmospheric thermal structure and exert great melting potential on snow ice sheets. In this study, decadal climatology of dust‐forced radiative heating (DRH) in atmosphere over Tibetan Plateau its surroundings (TPS) was investigated using Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART) model along with CALIPSO satellite observations from 2007 to 2016. After screening out other aerosols, vertical distribution dust examined accurately assess DRH. The net DRH showed a significant warm effect mainly by loading, which covers center sources their adjacent transport regions. maximum value appeared at near‐surface, while decreased an increase height. climatic average near‐surface reached 16.8 K/month Taklimakan Desert (TD) 10.8 Gangetic Plain spring, 13.7 Indus summer, is 3–3.6 times warmer than column‐averaged DRHs. This study also found most influence events Qaidam Basin TPS, 4.7 during spring. It noteworthy that intermonth interannual variations highlighted warming aerosols structure, especially near‐surface. addition, we need pay more attention changes snow‐related processes influenced absorbing light‐absorbing impurities deposited TPS.

Language: Английский

Citations

56
Characteristics of dust aerosols and identification of dust sources in Xinjiang, China DOI Creative Commons
Jie Liu, Jianli Ding,

Mayila Rexiding

et al.

Atmospheric Environment, Journal Year: 2021, Volume and Issue: 262, P. 118651 - 118651

Published: July 30, 2021

Language: Английский

Citations

48
Seasonal variability and trends in global type-segregated aerosol optical depth as revealed by MISR satellite observations DOI Creative Commons
Ke Gui, Huizheng Che, Yu Zheng

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 787, P. 147543 - 147543

Published: May 7, 2021

Language: Английский

Citations

47