The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study
Reactive chlorine and bromine species emitted from snow and aerosols can significantly alter the oxidative capacity of the polar boundary layer. However, halogen production mechanisms from snow remain highly uncertain, making it difficult for most models to include descriptions of halogen snow emiss...
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Other Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1029/2021JD036140 |
id |
ftncar:oai:drupal-site.org:articles_25268 |
---|---|
record_format |
openpolar |
spelling |
ftncar:oai:drupal-site.org:articles_25268 2024-04-14T08:05:36+00:00 The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study Ahmed, Shaddy (author) Thomas, Jennie L. (author) Tuite, Katie (author) Stutz, Jochen (author) Flocke, Frank (author) Orlando, John J. (author) Hornbrook, Rebecca S. (author) Apel, Eric C. (author) Emmons, Louisa K. (author) Helmig, Detlev (author) Boylan, Patrick (author) Huey, L. Gregory (author) Hall, Samuel R. (author) Ullmann, Kirk (author) Cantrell, Christopher A. (author) Fried, Alan (author) 2022-03-16 https://doi.org/10.1029/2021JD036140 en eng Journal of Geophysical Research: Atmospheres--JGR Atmospheres--2169-897X--2169-8996 Daily pan-Arctic sea-ice lead maps for 2003-2015, with links to maps in NetCDF format--10.1594/PANGAEA.854411 Aerosol measurements during OASIS Barrow field intensive Spring 2009, Version 1.0--10.5065/D6P8491K Ozone, NOx, and NOy measurements during OASIS Barrow field intensive Spring 2009, Version 1.0--10.5065/D6RJ4GK6 CESM2.1/CAM-chem Instantaneous Output for Boundary Conditions--10.5065/NMP7-EP60 PACT-1D model version including polar halogen emissions - output files--10.5281/zenodo.5654628 PACT1D/PACT-1D-HALOGENS: PACT-1D model (v1.1) including polar chlorine and bromine emission mechanisms--10.5281/zenodo.6045999 articles:25268 doi:10.1029/2021JD036140 ark:/85065/d7qj7mxc Copyright 2022 American Geophysical Union. article Text 2022 ftncar https://doi.org/10.1029/2021JD036140 2024-03-21T18:00:26Z Reactive chlorine and bromine species emitted from snow and aerosols can significantly alter the oxidative capacity of the polar boundary layer. However, halogen production mechanisms from snow remain highly uncertain, making it difficult for most models to include descriptions of halogen snow emissions and to understand the impact on atmospheric chemistry. We investigate the influence of Arctic halogen emissions from snow on boundary layer oxidation processes using a one-dimensional atmospheric chemistry and transport model (PACT-1D). To understand the combined impact of snow emissions and boundary layer dynamics on atmospheric chemistry, we model Cl-2 and Br-2 primary emissions from snow and include heterogeneous recycling of halogens on both snow and aerosols. We focus on a 2-day case study from the 2009 Ocean-Atmosphere-Sea Ice-Snowpack campaign at Utqia x121;vik, Alaska. The model reproduces both the diurnal cycle and high quantity of Cl-2 observed, along with the measured concentrations of Br-2, BrO, and HOBr. Due to the combined effects of emissions, recycling, vertical mixing, and atmospheric chemistry, reactive chlorine is typically confined to the lowest 15 m of the atmosphere, while bromine can impact chemistry up to and above the surface inversion height. Upon including halogen emissions and recycling, the concentration of HOx (HOx = OH + HO2) at the surface increases by as much as a factor of 30 at mid-day. The change in HOx due to halogen chemistry, as well as chlorine atoms derived from snow emissions, significantly reduce volatile organic compound lifetimes within a shallow layer near the surface. 1852977 Article in Journal/Newspaper Arctic Arctic Sea ice Alaska OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Journal of Geophysical Research: Atmospheres 127 5 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Reactive chlorine and bromine species emitted from snow and aerosols can significantly alter the oxidative capacity of the polar boundary layer. However, halogen production mechanisms from snow remain highly uncertain, making it difficult for most models to include descriptions of halogen snow emissions and to understand the impact on atmospheric chemistry. We investigate the influence of Arctic halogen emissions from snow on boundary layer oxidation processes using a one-dimensional atmospheric chemistry and transport model (PACT-1D). To understand the combined impact of snow emissions and boundary layer dynamics on atmospheric chemistry, we model Cl-2 and Br-2 primary emissions from snow and include heterogeneous recycling of halogens on both snow and aerosols. We focus on a 2-day case study from the 2009 Ocean-Atmosphere-Sea Ice-Snowpack campaign at Utqia x121;vik, Alaska. The model reproduces both the diurnal cycle and high quantity of Cl-2 observed, along with the measured concentrations of Br-2, BrO, and HOBr. Due to the combined effects of emissions, recycling, vertical mixing, and atmospheric chemistry, reactive chlorine is typically confined to the lowest 15 m of the atmosphere, while bromine can impact chemistry up to and above the surface inversion height. Upon including halogen emissions and recycling, the concentration of HOx (HOx = OH + HO2) at the surface increases by as much as a factor of 30 at mid-day. The change in HOx due to halogen chemistry, as well as chlorine atoms derived from snow emissions, significantly reduce volatile organic compound lifetimes within a shallow layer near the surface. 1852977 |
author2 |
Ahmed, Shaddy (author) Thomas, Jennie L. (author) Tuite, Katie (author) Stutz, Jochen (author) Flocke, Frank (author) Orlando, John J. (author) Hornbrook, Rebecca S. (author) Apel, Eric C. (author) Emmons, Louisa K. (author) Helmig, Detlev (author) Boylan, Patrick (author) Huey, L. Gregory (author) Hall, Samuel R. (author) Ullmann, Kirk (author) Cantrell, Christopher A. (author) Fried, Alan (author) |
format |
Article in Journal/Newspaper |
title |
The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study |
spellingShingle |
The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study |
title_short |
The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study |
title_full |
The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study |
title_fullStr |
The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study |
title_full_unstemmed |
The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modeling case study |
title_sort |
role of snow in controlling halogen chemistry and boundary layer oxidation during arctic spring: a 1d modeling case study |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021JD036140 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Sea ice Alaska |
genre_facet |
Arctic Arctic Sea ice Alaska |
op_relation |
Journal of Geophysical Research: Atmospheres--JGR Atmospheres--2169-897X--2169-8996 Daily pan-Arctic sea-ice lead maps for 2003-2015, with links to maps in NetCDF format--10.1594/PANGAEA.854411 Aerosol measurements during OASIS Barrow field intensive Spring 2009, Version 1.0--10.5065/D6P8491K Ozone, NOx, and NOy measurements during OASIS Barrow field intensive Spring 2009, Version 1.0--10.5065/D6RJ4GK6 CESM2.1/CAM-chem Instantaneous Output for Boundary Conditions--10.5065/NMP7-EP60 PACT-1D model version including polar halogen emissions - output files--10.5281/zenodo.5654628 PACT1D/PACT-1D-HALOGENS: PACT-1D model (v1.1) including polar chlorine and bromine emission mechanisms--10.5281/zenodo.6045999 articles:25268 doi:10.1029/2021JD036140 ark:/85065/d7qj7mxc |
op_rights |
Copyright 2022 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2021JD036140 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
127 |
container_issue |
5 |
_version_ |
1796302270542905344 |