Annual and seasonal variability in high latitude dust deposition, West Greenland
Abstract High latitude regions ( ≥ 50°N and ≥ 40°S) are thought to contribute substantially to contemporary global dust emissions which can influence biogeochemical cycling as well as geomorphic, cryospheric and atmospheric processes. However, there are few measurements of the emission or deposition...
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crwiley:10.1002/esp.5384 2024-03-31T07:53:05+00:00 Annual and seasonal variability in high latitude dust deposition, West Greenland van Soest, Maud A. J. Bullard, Joanna E. Prater, Clay Baddock, Matthew C. Anderson, N. John 2022 http://dx.doi.org/10.1002/esp.5384 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5384 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/esp.5384 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Earth Surface Processes and Landforms volume 47, issue 10, page 2393-2409 ISSN 0197-9337 1096-9837 Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development journal-article 2022 crwiley https://doi.org/10.1002/esp.5384 2024-03-04T13:02:55Z Abstract High latitude regions ( ≥ 50°N and ≥ 40°S) are thought to contribute substantially to contemporary global dust emissions which can influence biogeochemical cycling as well as geomorphic, cryospheric and atmospheric processes. However, there are few measurements of the emission or deposition of dust derived from these areas that extend beyond a single event or season. This article reports the deposition of locally‐derived dust to an ice‐free area of West Greenland over 2 years from 23 traps distributed across five sampling sites. Local dust sources include glacial outwash plains, glacially‐derived delta deposits and the reworking of loessic soils. Annual dust deposition is estimated at 37.3 to 93.9 g m −2 for 2017–2018 and 9.74 to 28.4 g m −2 in 2018–2019. This annual variation is driven by high deposition rates observed in spring 2017 of 0.48 g m −2 d −1 compared to the range of 0.03 to 0.07 g m −2 d −1 during the rest of the monitoring period. The high deposition rates in spring 2017 were due to warmer than average conditions and high meltwater sediment supply that delivered large quantities of sediment to local outwash plains in 2016. For other seasons, dust deposition was lower over both autumn–winter periods (0.03 g m −2 d −1 ) than during the spring and summer (0.04–0.07 g m −2 d −1 ). When sediment availability is limited, dust deposition increases with increasing temperature and wind speed. Secondary data from dust‐related weather type/observation codes and visibility records were found to be inconsistent with measured dust deposition during the period of study. One possible reason for this is the complex nature of the terrain between the observation and sample sites. The dust deposition rates measured here and the infidelity of the observed dust with secondary data sources reveal the importance of direct quantification of dust processes to accurately constrain the dust cycle at high latitudes. Article in Journal/Newspaper Greenland Wiley Online Library Greenland Earth Surface Processes and Landforms |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development |
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Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development van Soest, Maud A. J. Bullard, Joanna E. Prater, Clay Baddock, Matthew C. Anderson, N. John Annual and seasonal variability in high latitude dust deposition, West Greenland |
topic_facet |
Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development |
description |
Abstract High latitude regions ( ≥ 50°N and ≥ 40°S) are thought to contribute substantially to contemporary global dust emissions which can influence biogeochemical cycling as well as geomorphic, cryospheric and atmospheric processes. However, there are few measurements of the emission or deposition of dust derived from these areas that extend beyond a single event or season. This article reports the deposition of locally‐derived dust to an ice‐free area of West Greenland over 2 years from 23 traps distributed across five sampling sites. Local dust sources include glacial outwash plains, glacially‐derived delta deposits and the reworking of loessic soils. Annual dust deposition is estimated at 37.3 to 93.9 g m −2 for 2017–2018 and 9.74 to 28.4 g m −2 in 2018–2019. This annual variation is driven by high deposition rates observed in spring 2017 of 0.48 g m −2 d −1 compared to the range of 0.03 to 0.07 g m −2 d −1 during the rest of the monitoring period. The high deposition rates in spring 2017 were due to warmer than average conditions and high meltwater sediment supply that delivered large quantities of sediment to local outwash plains in 2016. For other seasons, dust deposition was lower over both autumn–winter periods (0.03 g m −2 d −1 ) than during the spring and summer (0.04–0.07 g m −2 d −1 ). When sediment availability is limited, dust deposition increases with increasing temperature and wind speed. Secondary data from dust‐related weather type/observation codes and visibility records were found to be inconsistent with measured dust deposition during the period of study. One possible reason for this is the complex nature of the terrain between the observation and sample sites. The dust deposition rates measured here and the infidelity of the observed dust with secondary data sources reveal the importance of direct quantification of dust processes to accurately constrain the dust cycle at high latitudes. |
format |
Article in Journal/Newspaper |
author |
van Soest, Maud A. J. Bullard, Joanna E. Prater, Clay Baddock, Matthew C. Anderson, N. John |
author_facet |
van Soest, Maud A. J. Bullard, Joanna E. Prater, Clay Baddock, Matthew C. Anderson, N. John |
author_sort |
van Soest, Maud A. J. |
title |
Annual and seasonal variability in high latitude dust deposition, West Greenland |
title_short |
Annual and seasonal variability in high latitude dust deposition, West Greenland |
title_full |
Annual and seasonal variability in high latitude dust deposition, West Greenland |
title_fullStr |
Annual and seasonal variability in high latitude dust deposition, West Greenland |
title_full_unstemmed |
Annual and seasonal variability in high latitude dust deposition, West Greenland |
title_sort |
annual and seasonal variability in high latitude dust deposition, west greenland |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/esp.5384 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5384 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/esp.5384 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Earth Surface Processes and Landforms volume 47, issue 10, page 2393-2409 ISSN 0197-9337 1096-9837 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/esp.5384 |
container_title |
Earth Surface Processes and Landforms |
_version_ |
1795032548303175680 |