Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions
The clean air actions of the Chinese government since 2013 have led to rapid reduction in anthropogenic emissions during the last five years. In this study, we present a regional-scale insight into the transition of aerosol properties during this special period based on integrated Moderate Resolutio...
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ftdoajarticles:oai:doaj.org/article:74cc606745db455ca39aa39155870745 2023-05-15T13:06:54+02:00 Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions Minghui Tao Lili Wang Liangfu Chen Zifeng Wang Jinhua Tao 2020-02-01T00:00:00Z https://doi.org/10.3390/rs12030523 https://doaj.org/article/74cc606745db455ca39aa39155870745 EN eng MDPI AG https://www.mdpi.com/2072-4292/12/3/523 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs12030523 https://doaj.org/article/74cc606745db455ca39aa39155870745 Remote Sensing, Vol 12, Iss 3, p 523 (2020) aerosols satellite reversal eastern china anthropogenic emissions Science Q article 2020 ftdoajarticles https://doi.org/10.3390/rs12030523 2022-12-31T16:06:41Z The clean air actions of the Chinese government since 2013 have led to rapid reduction in anthropogenic emissions during the last five years. In this study, we present a regional-scale insight into the transition of aerosol properties during this special period based on integrated Moderate Resolution Imaging Spectroradiometer (MODIS), Multi-angle Imaging Spectroradiometer (MISR), and ground-based AERONET (AErosol RObotic NETwork) observations. As a response, aerosols in eastern China have exhibited notable reversal in both the amount and optical properties. Regional haze pollution with Aerosol Optical Depth (AOD) > 1.0 in northern China declined from more than ~80 days per year to less than ~30 days. While fine-mode particles exhibited a continuous decrease by ~30-40% during the time period of 2013−2018, the levels of coarse aerosols had no regular variations. MISR fraction AOD of different size modes shows that there has been an obvious overall decline in coarse particles over eastern China, but natural sources such as long-range dust transport make a considerable contribution. The Single Scattering Albedo (SSA) increased steadily from 2001 to 2012 by more than ~0.05. In contrast, aerosol absorption has been getting stronger since 2013, with SSA increasing by ~0.03, due to a much larger reduction in sulfate and nitrate. The drastic transition of aerosol properties has greatly changed aerosol radiative forcing (ARF) in eastern China. The negative ARF at the top (TOA) and bottom (BOA) of the atmosphere decreased by ~30 and ~50 W/m 2 , respectively, in Beijing during the 2001−2012 period. Although aerosol loading continued to decline after 2013, the magnitudes of TOA and BOA ARF have increased by ~10 and ~30 W/m 2 , respectively, since 2013, due largely to the enhanced aerosol absorption. Our results suggest that more comprehensive observations are needed to improve understanding of the intense climate and environment effects of dramatic aerosol properties in eastern China. Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Boa ENVELOPE(15.532,15.532,66.822,66.822) Remote Sensing 12 3 523 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
aerosols satellite reversal eastern china anthropogenic emissions Science Q |
spellingShingle |
aerosols satellite reversal eastern china anthropogenic emissions Science Q Minghui Tao Lili Wang Liangfu Chen Zifeng Wang Jinhua Tao Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions |
topic_facet |
aerosols satellite reversal eastern china anthropogenic emissions Science Q |
description |
The clean air actions of the Chinese government since 2013 have led to rapid reduction in anthropogenic emissions during the last five years. In this study, we present a regional-scale insight into the transition of aerosol properties during this special period based on integrated Moderate Resolution Imaging Spectroradiometer (MODIS), Multi-angle Imaging Spectroradiometer (MISR), and ground-based AERONET (AErosol RObotic NETwork) observations. As a response, aerosols in eastern China have exhibited notable reversal in both the amount and optical properties. Regional haze pollution with Aerosol Optical Depth (AOD) > 1.0 in northern China declined from more than ~80 days per year to less than ~30 days. While fine-mode particles exhibited a continuous decrease by ~30-40% during the time period of 2013−2018, the levels of coarse aerosols had no regular variations. MISR fraction AOD of different size modes shows that there has been an obvious overall decline in coarse particles over eastern China, but natural sources such as long-range dust transport make a considerable contribution. The Single Scattering Albedo (SSA) increased steadily from 2001 to 2012 by more than ~0.05. In contrast, aerosol absorption has been getting stronger since 2013, with SSA increasing by ~0.03, due to a much larger reduction in sulfate and nitrate. The drastic transition of aerosol properties has greatly changed aerosol radiative forcing (ARF) in eastern China. The negative ARF at the top (TOA) and bottom (BOA) of the atmosphere decreased by ~30 and ~50 W/m 2 , respectively, in Beijing during the 2001−2012 period. Although aerosol loading continued to decline after 2013, the magnitudes of TOA and BOA ARF have increased by ~10 and ~30 W/m 2 , respectively, since 2013, due largely to the enhanced aerosol absorption. Our results suggest that more comprehensive observations are needed to improve understanding of the intense climate and environment effects of dramatic aerosol properties in eastern China. |
format |
Article in Journal/Newspaper |
author |
Minghui Tao Lili Wang Liangfu Chen Zifeng Wang Jinhua Tao |
author_facet |
Minghui Tao Lili Wang Liangfu Chen Zifeng Wang Jinhua Tao |
author_sort |
Minghui Tao |
title |
Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions |
title_short |
Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions |
title_full |
Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions |
title_fullStr |
Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions |
title_full_unstemmed |
Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions |
title_sort |
reversal of aerosol properties in eastern china with rapid decline of anthropogenic emissions |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/rs12030523 https://doaj.org/article/74cc606745db455ca39aa39155870745 |
long_lat |
ENVELOPE(15.532,15.532,66.822,66.822) |
geographic |
Boa |
geographic_facet |
Boa |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Remote Sensing, Vol 12, Iss 3, p 523 (2020) |
op_relation |
https://www.mdpi.com/2072-4292/12/3/523 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs12030523 https://doaj.org/article/74cc606745db455ca39aa39155870745 |
op_doi |
https://doi.org/10.3390/rs12030523 |
container_title |
Remote Sensing |
container_volume |
12 |
container_issue |
3 |
container_start_page |
523 |
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1766026206272028672 |