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Journal Articles (Review Article) Atmospheric Chemistry and Physics Year : 2022

Newly identified climatically and environmentally significant high-latitude dust sources

Outi Meinander
Pavla Dagsson-Waldhauserova
Pavel Amosov
  • Function : Author
Elena Aseyeva
  • Function : Author
Cliff Atkins
  • Function : Author
Alexander Baklanov
  • Function : Author
Clarissa Baldo
Sarah Barr
  • Function : Author
Barbara Barzycka
  • Function : Author
Liane Benning
Bojan Cvetkovic
  • Function : Author
Polina Enchilik
  • Function : Author
Denis Frolov
Santiago Gassó
Konrad Kandler
  • Function : Author
Nikolay Kasimov
Jan Kavan
  • Function : Author
James King
  • Function : Author
Tatyana Koroleva
  • Function : Author
Viktoria Krupskaya
  • Function : Author
Markku Kulmala
Monika Kusiak
  • Function : Author
Hanna Lappalainen
  • Function : Author
Michał Laska
  • Function : Author
Jerome Lasne
Marek Lewandowski
  • Function : Author
Bartłomiej Luks
James Mcquaid
Beatrice Moroni
  • Function : Author
Benjamin Murray
  • Function : Author
Ottmar Möhler
Adam Nawrot
  • Function : Author
Slobodan Nickovic
Norman O’neill
  • Function : Author
Goran Pejanovic
  • Function : Author
Olga Popovicheva
  • Function : Author
Keyvan Ranjbar
Manolis Romanias
Olga Samonova
  • Function : Author
Alberto Sanchez-Marroquin
Kerstin Schepanski
  • Function : Author
Ivan Semenkov
Anna Sharapova
  • Function : Author
Elena Shevnina
Zongbo Shi
Mikhail Sofiev
  • Function : Author
Frédéric Thevenet
Throstur Thorsteinsson
Mikhail Timofeev
  • Function : Author
Nsikanabasi Silas Umo
Andreas Uppstu
  • Function : Author
György Varga
  • Function : Author
Tomasz Werner
  • Function : Author
Olafur Arnalds
  • Function : Author
Ana Vukovic Vimic
  • Function : Author

Abstract

Abstract. Dust particles from high latitudes have a potentially large local, regional, and global significance to climate and the environment as short-lived climate forcers, air pollutants, and nutrient sources. Identifying the locations of local dust sources and their emission, transport, and deposition processes is important for understanding the multiple impacts of high-latitude dust (HLD) on the Earth's systems. Here, we identify, describe, and quantify the source intensity (SI) values, which show the potential of soil surfaces for dust emission scaled to values 0 to 1 concerning globally best productive sources, using the Global Sand and Dust Storms Source Base Map (G-SDS-SBM). This includes 64 HLD sources in our collection for the northern (Alaska, Canada, Denmark, Greenland, Iceland, Svalbard, Sweden, and Russia) and southern (Antarctica and Patagonia) high latitudes. Activity from most of these HLD sources shows seasonal character. It is estimated that high-latitude land areas with higher (SI ≥0.5), very high (SI ≥0.7), and the highest potential (SI ≥0.9) for dust emission cover >1 670 000 km2, >560 000 km2, and >240 000 km2, respectively. In the Arctic HLD region (≥60∘ N), land area with SI ≥0.5 is 5.5 % (1 035 059 km2), area with SI ≥0.7 is 2.3 % (440 804 km2), and area with SI ≥0.9 is 1.1 % (208 701 km2). Minimum SI values in the northern HLD region are about 3 orders of magnitude smaller, indicating that the dust sources of this region greatly depend on weather conditions. Our spatial dust source distribution analysis modeling results showed evidence supporting a northern HLD belt, defined as the area north of 50∘ N, with a “transitional HLD-source area” extending at latitudes 50–58∘ N in Eurasia and 50–55∘ N in Canada and a “cold HLD-source area” including areas north of 60∘ N in Eurasia and north of 58∘ N in Canada, with currently “no dust source” area between the HLD and low-latitude dust (LLD) dust belt, except for British Columbia. Using the global atmospheric transport model SILAM, we estimated that 1.0 % of the global dust emission originated from the high-latitude regions. About 57 % of the dust deposition in snow- and ice-covered Arctic regions was from HLD sources. In the southern HLD region, soil surface conditions are favorable for dust emission during the whole year. Climate change can cause a decrease in the duration of snow cover, retreat of glaciers, and an increase in drought, heatwave intensity, and frequency, leading to the increasing frequency of topsoil conditions favorable for dust emission, which increases the probability of dust storms. Our study provides a step forward to improve the representation of HLD in models and to monitor, quantify, and assess the environmental and climate significance of HLD.
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Dates and versions

hal-04199194 , version 1 (07-09-2023)

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Outi Meinander, Pavla Dagsson-Waldhauserova, Pavel Amosov, Elena Aseyeva, Cliff Atkins, et al.. Newly identified climatically and environmentally significant high-latitude dust sources. Atmospheric Chemistry and Physics, 2022, 22 (17), pp.11889-11930. ⟨10.5194/acp-22-11889-2022⟩. ⟨hal-04199194⟩
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