Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition
Two three-dimensional reanalysis datasets of atmospheric composition, the Copernicus Atmosphere Monitoring Service reanalysis (CAMSRA) and the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), are analyzed for the years 2003–2018 with respect to dust transport int...
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Stockholm University Press
2023
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ftdoajarticles:oai:doaj.org/article:e553e64b6acd492fb843861189d6c304 2023-09-05T13:16:16+02:00 Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition Sebastian Böö Annica M. L. Ekman Gunilla Svensson Abhay Devasthale 2023-07-01T00:00:00Z https://doi.org/10.16993/tellusb.1866 https://doaj.org/article/e553e64b6acd492fb843861189d6c304 EN eng Stockholm University Press https://account.b.tellusjournals.se/index.php/su-j-tbcpm/article/view/1866 https://doaj.org/toc/1600-0889 1600-0889 doi:10.16993/tellusb.1866 https://doaj.org/article/e553e64b6acd492fb843861189d6c304 Tellus: Series B, Chemical and Physical Meteorology, Vol 75, Iss 1, Pp 13–32-13–32 (2023) aerosols arctic dust inp transport reanalysis Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.16993/tellusb.1866 2023-08-13T00:37:54Z Two three-dimensional reanalysis datasets of atmospheric composition, the Copernicus Atmosphere Monitoring Service reanalysis (CAMSRA) and the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), are analyzed for the years 2003–2018 with respect to dust transport into the Arctic. The reanalyses agree on that the largest mass transport of dust into the Arctic occurs across western Russia during spring and early summer, but substantial transport events occasionally also occur across other geographical areas during all seasons. In many aspects, however, the reanalyses show considerable differences: the mass transport in MERRA-2 is substantially larger, more spread out, and occurs at higher altitudes than in CAMSRA, while the transport in CAMSRA is to a higher degree focused to well-defined events in space and time; the integrated mass transport of the 10 most intense 36-hour dust events in CAMSRA constitutes 6 % of the total integrated dust transport 2003–2018, whereas the corresponding value for MERRA-2 is only 1 %. Furthermore, we compare the reanalyses with surface measurements of dust in the Arctic and dust extinction retrievals from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) satellite data. This comparison indicates that CAMSRA underestimates the dust transport into the Arctic and that MERRA-2 likely overestimates it. The discrepancy between CAMSRA and MERRA-2 can partially be explained by the assimilation process where too little dust is assimilated in CAMSRA while in MERRA-2, the assimilation process increases the dust concentration in remote areas. Despite the profound differences between the reanalyses regarding dust transport into the Arctic, this study still brings new insights into the spatio-temporal distribution of the transport. We estimate the annual dust transport into the Arctic to be within the range 1.5–31 Tg, where the comparison with observations indicates that the lower end of the interval is less likely. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Merra ENVELOPE(12.615,12.615,65.816,65.816) Tellus B: Chemical and Physical Meteorology 75 1 13 32 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
aerosols arctic dust inp transport reanalysis Meteorology. Climatology QC851-999 |
spellingShingle |
aerosols arctic dust inp transport reanalysis Meteorology. Climatology QC851-999 Sebastian Böö Annica M. L. Ekman Gunilla Svensson Abhay Devasthale Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition |
topic_facet |
aerosols arctic dust inp transport reanalysis Meteorology. Climatology QC851-999 |
description |
Two three-dimensional reanalysis datasets of atmospheric composition, the Copernicus Atmosphere Monitoring Service reanalysis (CAMSRA) and the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), are analyzed for the years 2003–2018 with respect to dust transport into the Arctic. The reanalyses agree on that the largest mass transport of dust into the Arctic occurs across western Russia during spring and early summer, but substantial transport events occasionally also occur across other geographical areas during all seasons. In many aspects, however, the reanalyses show considerable differences: the mass transport in MERRA-2 is substantially larger, more spread out, and occurs at higher altitudes than in CAMSRA, while the transport in CAMSRA is to a higher degree focused to well-defined events in space and time; the integrated mass transport of the 10 most intense 36-hour dust events in CAMSRA constitutes 6 % of the total integrated dust transport 2003–2018, whereas the corresponding value for MERRA-2 is only 1 %. Furthermore, we compare the reanalyses with surface measurements of dust in the Arctic and dust extinction retrievals from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) satellite data. This comparison indicates that CAMSRA underestimates the dust transport into the Arctic and that MERRA-2 likely overestimates it. The discrepancy between CAMSRA and MERRA-2 can partially be explained by the assimilation process where too little dust is assimilated in CAMSRA while in MERRA-2, the assimilation process increases the dust concentration in remote areas. Despite the profound differences between the reanalyses regarding dust transport into the Arctic, this study still brings new insights into the spatio-temporal distribution of the transport. We estimate the annual dust transport into the Arctic to be within the range 1.5–31 Tg, where the comparison with observations indicates that the lower end of the interval is less likely. |
format |
Article in Journal/Newspaper |
author |
Sebastian Böö Annica M. L. Ekman Gunilla Svensson Abhay Devasthale |
author_facet |
Sebastian Böö Annica M. L. Ekman Gunilla Svensson Abhay Devasthale |
author_sort |
Sebastian Böö |
title |
Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition |
title_short |
Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition |
title_full |
Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition |
title_fullStr |
Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition |
title_full_unstemmed |
Transport of Mineral Dust Into the Arctic in Two Reanalysis Datasets of Atmospheric Composition |
title_sort |
transport of mineral dust into the arctic in two reanalysis datasets of atmospheric composition |
publisher |
Stockholm University Press |
publishDate |
2023 |
url |
https://doi.org/10.16993/tellusb.1866 https://doaj.org/article/e553e64b6acd492fb843861189d6c304 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Arctic Merra |
geographic_facet |
Arctic Merra |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Tellus: Series B, Chemical and Physical Meteorology, Vol 75, Iss 1, Pp 13–32-13–32 (2023) |
op_relation |
https://account.b.tellusjournals.se/index.php/su-j-tbcpm/article/view/1866 https://doaj.org/toc/1600-0889 1600-0889 doi:10.16993/tellusb.1866 https://doaj.org/article/e553e64b6acd492fb843861189d6c304 |
op_doi |
https://doi.org/10.16993/tellusb.1866 |
container_title |
Tellus B: Chemical and Physical Meteorology |
container_volume |
75 |
container_issue |
1 |
container_start_page |
13 |
op_container_end_page |
32 |
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1776197914698186752 |