منابع مشابه
Atmospheric depletion of mercury over Antarctica during glacial periods
Mercury is a globally dispersed toxic metal that affects even remote polar areas. During seasonal atmospheric mercury depletion events in polar areas, mercury is removed from the atmosphere1,2 and subsequently deposited in the surface snows3. However, it is unknown whether these events, which have been documented for the past two decades, have occurred in the past. Here we show that over the pa...
متن کاملUnravelling the evolutionary history and future prospects of endemic 1 species restricted to former glacial refugia
1 Division of Biological and Environmental Sciences, School of Natural Sciences, University of 4 Stirling, Stirling FK9 4LA, Scotland, UK 5 2 Estación Biológica de Doñana (CSIC), Avda Americo Vespucio s/n 41092 Seville, Spain 6 3 Laboratorio di Genetica, Istituto Superiore per la Protezione e Ricerca Ambientale, Ozzano Emilia, 7 Bologna, Italy 8 4 Department 18/ Section of Environmental Enginee...
متن کاملUnravelling the evolutionary history and future prospects of endemic species restricted to former glacial refugia.
The contemporary distribution and genetic composition of biodiversity bear a signature of species' evolutionary histories and the effects of past climatic oscillations. For many European species, the Mediterranean peninsulas of Iberia, Italy and the Balkans acted as glacial refugia and the source of range recolonization, and as a result, they contain disproportionately high levels of diversity....
متن کاملIncreased dust deposition in the Pacific Southern Ocean during glacial periods.
Dust deposition in the Southern Ocean constitutes a critical modulator of past global climate variability, but how it has varied temporally and geographically is underdetermined. Here, we present data sets of glacial-interglacial dust-supply cycles from the largest Southern Ocean sector, the polar South Pacific, indicating three times higher dust deposition during glacial periods than during in...
متن کاملHalogen species record Antarctic sea ice extent over glacial – interglacial periods
Sea ice is an integral part of the earth’s climate system because it affects planetary albedo, sea-surface salinity, and the atmosphere–ocean exchange of reactive gases and aerosols. Bromine and iodine chemistry is active at polar sea ice margins with the occurrence of bromine explosions and the biological production of organoiodine from sea ice algae. Satellite measurements demonstrate that co...
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ژورنال
عنوان ژورنال: Nature
سال: 1890
ISSN: 0028-0836,1476-4687
DOI: 10.1038/041441b0