The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes
Convective transport plays a key role in aerosol enhancement in the upper troposphere and lower stratosphere (UTLS) over the Asian monsoon region where low-level convective instability persists throughout the year. We use the state-of-the-art ECHAM6–HAMMOZ global chemistry–climate model to investiga...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2019
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-19-9989-2019 https://doaj.org/article/1f67f21e523f4979a66e6879e083bae9 |
id |
ftdoajarticles:oai:doaj.org/article:1f67f21e523f4979a66e6879e083bae9 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:1f67f21e523f4979a66e6879e083bae9 2023-05-15T14:56:35+02:00 The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes S. Fadnavis R. Müller G. Kalita M. Rowlinson A. Rap J.-L. F. Li B. Gasparini A. Laakso 2019-08-01T00:00:00Z https://doi.org/10.5194/acp-19-9989-2019 https://doaj.org/article/1f67f21e523f4979a66e6879e083bae9 EN eng Copernicus Publications https://www.atmos-chem-phys.net/19/9989/2019/acp-19-9989-2019.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-19-9989-2019 1680-7316 1680-7324 https://doaj.org/article/1f67f21e523f4979a66e6879e083bae9 Atmospheric Chemistry and Physics, Vol 19, Pp 9989-10008 (2019) Physics QC1-999 Chemistry QD1-999 article 2019 ftdoajarticles https://doi.org/10.5194/acp-19-9989-2019 2022-12-31T04:14:23Z Convective transport plays a key role in aerosol enhancement in the upper troposphere and lower stratosphere (UTLS) over the Asian monsoon region where low-level convective instability persists throughout the year. We use the state-of-the-art ECHAM6–HAMMOZ global chemistry–climate model to investigate the seasonal transport of anthropogenic Asian sulfate aerosols and their impact on the UTLS. Sensitivity simulations for SO 2 emission perturbation over India (48 % increase) and China (70 % decrease) are performed based on the Ozone Monitoring Instrument (OMI) satellite-observed trend, rising over India by ∼4.8 % per year and decreasing over China by ∼7.0 % per year during 2006–2017. The enhanced Indian emissions result in an increase in aerosol optical depth (AOD) loading in the UTLS by 0.61 to 4.17 % over India. These aerosols are transported to the Arctic during all seasons by the lower branch of the Brewer–Dobson circulation enhancing AOD by 0.017 % to 4.8 %. Interestingly, a reduction in SO 2 emission over China inhibits the transport of Indian sulfate aerosols to the Arctic in summer-monsoon and post-monsoon seasons due to subsidence over northern India. The region of sulfate aerosol enhancement shows significant warming in the UTLS over northern India, south China ( 0.2±0.15 to 0.8±0.72 K) and the Arctic ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M8" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">1</mn><mo>±</mo><mn mathvariant="normal">0.62</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="51pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="6b8d82df5c23f66fffe20f5420b1c3f8"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-19-9989-2019-ie00001.svg" width="51pt" height="10pt" src="acp-19-9989-2019-ie00001.png"/></svg:svg> to 1.6±1.07 K). The estimated seasonal mean direct radiative forcing at the top of ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Indian Atmospheric Chemistry and Physics 19 15 9989 10008 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 S. Fadnavis R. Müller G. Kalita M. Rowlinson A. Rap J.-L. F. Li B. Gasparini A. Laakso The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Convective transport plays a key role in aerosol enhancement in the upper troposphere and lower stratosphere (UTLS) over the Asian monsoon region where low-level convective instability persists throughout the year. We use the state-of-the-art ECHAM6–HAMMOZ global chemistry–climate model to investigate the seasonal transport of anthropogenic Asian sulfate aerosols and their impact on the UTLS. Sensitivity simulations for SO 2 emission perturbation over India (48 % increase) and China (70 % decrease) are performed based on the Ozone Monitoring Instrument (OMI) satellite-observed trend, rising over India by ∼4.8 % per year and decreasing over China by ∼7.0 % per year during 2006–2017. The enhanced Indian emissions result in an increase in aerosol optical depth (AOD) loading in the UTLS by 0.61 to 4.17 % over India. These aerosols are transported to the Arctic during all seasons by the lower branch of the Brewer–Dobson circulation enhancing AOD by 0.017 % to 4.8 %. Interestingly, a reduction in SO 2 emission over China inhibits the transport of Indian sulfate aerosols to the Arctic in summer-monsoon and post-monsoon seasons due to subsidence over northern India. The region of sulfate aerosol enhancement shows significant warming in the UTLS over northern India, south China ( 0.2±0.15 to 0.8±0.72 K) and the Arctic ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M8" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">1</mn><mo>±</mo><mn mathvariant="normal">0.62</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="51pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="6b8d82df5c23f66fffe20f5420b1c3f8"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-19-9989-2019-ie00001.svg" width="51pt" height="10pt" src="acp-19-9989-2019-ie00001.png"/></svg:svg> to 1.6±1.07 K). The estimated seasonal mean direct radiative forcing at the top of ... |
format |
Article in Journal/Newspaper |
author |
S. Fadnavis R. Müller G. Kalita M. Rowlinson A. Rap J.-L. F. Li B. Gasparini A. Laakso |
author_facet |
S. Fadnavis R. Müller G. Kalita M. Rowlinson A. Rap J.-L. F. Li B. Gasparini A. Laakso |
author_sort |
S. Fadnavis |
title |
The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes |
title_short |
The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes |
title_full |
The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes |
title_fullStr |
The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes |
title_full_unstemmed |
The impact of recent changes in Asian anthropogenic emissions of SO 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes |
title_sort |
impact of recent changes in asian anthropogenic emissions of so 2 on sulfate loading in the upper troposphere and lower stratosphere and the associated radiative changes |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/acp-19-9989-2019 https://doaj.org/article/1f67f21e523f4979a66e6879e083bae9 |
geographic |
Arctic Indian |
geographic_facet |
Arctic Indian |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 19, Pp 9989-10008 (2019) |
op_relation |
https://www.atmos-chem-phys.net/19/9989/2019/acp-19-9989-2019.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-19-9989-2019 1680-7316 1680-7324 https://doaj.org/article/1f67f21e523f4979a66e6879e083bae9 |
op_doi |
https://doi.org/10.5194/acp-19-9989-2019 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
19 |
container_issue |
15 |
container_start_page |
9989 |
op_container_end_page |
10008 |
_version_ |
1766328669488283648 |