Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic
In this study, the WRF-Chem regional model is updated to improve simulated short-lived pollutants (e.g., aerosols, ozone) in the Arctic. Specifically, we include in WRF-Chem 3.5.1 (with SAPRC-99 gas-phase chemistry and MOSAIC aerosols) (1) a correction to the sedimentation of aerosols, (2) dimethyl...
Published in: | Geoscientific Model Development |
---|---|
Main Authors: | , , , , , , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/gmd-10-3661-2017 https://gmd.copernicus.org/articles/10/3661/2017/ |
id |
ftcopernicus:oai:publications.copernicus.org:gmd58269 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:gmd58269 2023-05-15T13:10:59+02:00 Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic Marelle, Louis Raut, Jean-Christophe Law, Kathy S. Berg, Larry K. Fast, Jerome D. Easter, Richard C. Shrivastava, Manish Thomas, Jennie L. 2018-09-27 application/pdf https://doi.org/10.5194/gmd-10-3661-2017 https://gmd.copernicus.org/articles/10/3661/2017/ eng eng doi:10.5194/gmd-10-3661-2017 https://gmd.copernicus.org/articles/10/3661/2017/ eISSN: 1991-9603 Text 2018 ftcopernicus https://doi.org/10.5194/gmd-10-3661-2017 2020-07-20T16:23:34Z In this study, the WRF-Chem regional model is updated to improve simulated short-lived pollutants (e.g., aerosols, ozone) in the Arctic. Specifically, we include in WRF-Chem 3.5.1 (with SAPRC-99 gas-phase chemistry and MOSAIC aerosols) (1) a correction to the sedimentation of aerosols, (2) dimethyl sulfide (DMS) oceanic emissions and gas-phase chemistry, (3) an improved representation of the dry deposition of trace gases over seasonal snow, and (4) an UV-albedo dependence on snow and ice cover for photolysis calculations. We also (5) correct the representation of surface temperatures over melting ice in the Noah Land Surface Model and (6) couple and further test the recent KF-CuP (Kain–Fritsch + Cumulus Potential) cumulus parameterization that includes the effect of cumulus clouds on aerosols and trace gases. The updated model is used to perform quasi-hemispheric simulations of aerosols and ozone, which are evaluated against surface measurements of black carbon (BC), sulfate, and ozone as well as airborne measurements of BC in the Arctic. The updated model shows significant improvements in terms of seasonal aerosol cycles at the surface and root mean square errors (RMSEs) for surface ozone, aerosols, and BC aloft, compared to the base version of the model and to previous large-scale evaluations of WRF-Chem in the Arctic. These improvements are mostly due to the inclusion of cumulus effects on aerosols and trace gases in KF-CuP (improved RMSE for surface BC and BC profiles, surface sulfate, and surface ozone), the improved surface temperatures over sea ice (surface ozone, BC, and sulfate), and the updated trace gas deposition and UV albedo over snow and ice (improved RMSE and correlation for surface ozone). DMS emissions and chemistry improve surface sulfate at all Arctic sites except Zeppelin, and correcting aerosol sedimentation has little influence on aerosols except in the upper troposphere. Text albedo Arctic black carbon Sea ice Copernicus Publications: E-Journals Arctic Geoscientific Model Development 10 10 3661 3677 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
In this study, the WRF-Chem regional model is updated to improve simulated short-lived pollutants (e.g., aerosols, ozone) in the Arctic. Specifically, we include in WRF-Chem 3.5.1 (with SAPRC-99 gas-phase chemistry and MOSAIC aerosols) (1) a correction to the sedimentation of aerosols, (2) dimethyl sulfide (DMS) oceanic emissions and gas-phase chemistry, (3) an improved representation of the dry deposition of trace gases over seasonal snow, and (4) an UV-albedo dependence on snow and ice cover for photolysis calculations. We also (5) correct the representation of surface temperatures over melting ice in the Noah Land Surface Model and (6) couple and further test the recent KF-CuP (Kain–Fritsch + Cumulus Potential) cumulus parameterization that includes the effect of cumulus clouds on aerosols and trace gases. The updated model is used to perform quasi-hemispheric simulations of aerosols and ozone, which are evaluated against surface measurements of black carbon (BC), sulfate, and ozone as well as airborne measurements of BC in the Arctic. The updated model shows significant improvements in terms of seasonal aerosol cycles at the surface and root mean square errors (RMSEs) for surface ozone, aerosols, and BC aloft, compared to the base version of the model and to previous large-scale evaluations of WRF-Chem in the Arctic. These improvements are mostly due to the inclusion of cumulus effects on aerosols and trace gases in KF-CuP (improved RMSE for surface BC and BC profiles, surface sulfate, and surface ozone), the improved surface temperatures over sea ice (surface ozone, BC, and sulfate), and the updated trace gas deposition and UV albedo over snow and ice (improved RMSE and correlation for surface ozone). DMS emissions and chemistry improve surface sulfate at all Arctic sites except Zeppelin, and correcting aerosol sedimentation has little influence on aerosols except in the upper troposphere. |
format |
Text |
author |
Marelle, Louis Raut, Jean-Christophe Law, Kathy S. Berg, Larry K. Fast, Jerome D. Easter, Richard C. Shrivastava, Manish Thomas, Jennie L. |
spellingShingle |
Marelle, Louis Raut, Jean-Christophe Law, Kathy S. Berg, Larry K. Fast, Jerome D. Easter, Richard C. Shrivastava, Manish Thomas, Jennie L. Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic |
author_facet |
Marelle, Louis Raut, Jean-Christophe Law, Kathy S. Berg, Larry K. Fast, Jerome D. Easter, Richard C. Shrivastava, Manish Thomas, Jennie L. |
author_sort |
Marelle, Louis |
title |
Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic |
title_short |
Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic |
title_full |
Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic |
title_fullStr |
Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic |
title_full_unstemmed |
Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic |
title_sort |
improvements to the wrf-chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the arctic |
publishDate |
2018 |
url |
https://doi.org/10.5194/gmd-10-3661-2017 https://gmd.copernicus.org/articles/10/3661/2017/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic black carbon Sea ice |
genre_facet |
albedo Arctic black carbon Sea ice |
op_source |
eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-10-3661-2017 https://gmd.copernicus.org/articles/10/3661/2017/ |
op_doi |
https://doi.org/10.5194/gmd-10-3661-2017 |
container_title |
Geoscientific Model Development |
container_volume |
10 |
container_issue |
10 |
container_start_page |
3661 |
op_container_end_page |
3677 |
_version_ |
1766245487496658944 |