Newly identified climatically and environmentally significant high-latitude dust sources

作者：Outi Meinander, Pavla Dagsson‐Waldhauserová, P. V. Amosov, Elena Aseyeva, Cliff Atkins, Alexander Baklanov, Clarissa Baldo, Sarah Barr, Barbara Barzycka, Liane G. Benning, Bojan Cvetković, Polina Enchilik, D. М. Frolov, Santiago Gassó, Konrad Kandler, Н.С. Касимов, Jan Kavan, James King, Tatyana Koroleva, V. V. Krupskaya, Markku Kulmala, Monika A. Kusiak, Hanna K. Lappalainen, Michał Laska, Jérôme Lasne, Marek Lewandowski, Bartłomiej Luks, James B. McQuaid, Beatrice Moroni, Benjamin J. Murray, Ottmar Möhler, Adam Nawrót, Slobodan Ničković, Norman T. O’Neill, Goran Pejanović, Olga Popovicheva, Keyvan Ranjbar, Manolis N. Romanías, Olga Samonova, Alberto Sánchez-Marroquín, Kerstin Schepanski, И. Н. Семенков, Anna Sharapova, Elena Shevnina, Zongbo Shi, Mikhail Sofiev, Frédéric Thévenet, Þröstur Þorsteinsson, М. А. Тимофеев, Nsikanabasi Silas Umo, Andreas Uppstu, Darya Urupina, György Varga, Tomasz Werner, Ólafur Arnalds, Ana Vukovic Vimic · 发表于：Atmospheric chemistry and physics · 年份：2022 · DOI：10.5194/acp-22-11889-2022 · 被引用次数：109 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric and Environmental Gas Dynamics、Cryospheric studies and observations

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 w...