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Microbial mercury methylation in Antarctic sea ice
Nature Microbiology, 2016Atmospheric deposition of mercury onto sea ice and circumpolar sea water provides mercury for microbial methylation, and contributes to the bioaccumulation of the potent neurotoxin methylmercury in the marine food web. Little is known about the abiotic and biotic controls on microbial mercury methylation in polar marine systems.
Caitlin M. Gionfriddo +9 more
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BIOGEOCHEMISTRY OF ANTARCTIC SEA ICE
2002Antarctic sea ice at its maximum extent in winter covers 40% of the Southern Ocean in a frozen layer, on average, 1 m thick. Sea ice is not solid, rather it is an ice crystal matrix permeated by a labyrinth of brine filled channels and pores in which life thrives.
Gerhard Dieckmann, David N. Thomas
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Science, 2003
The extent of sea ice around Antartica and the Arctic should be a sensitive indicator of climatic change at the poles. In his Perspective, Wolff highlights the report of Curran et al ., who have compared a potential chemical proxy for sea ice extent from an ice core with satellite records for sea ice extent in the nearby ocean.
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The extent of sea ice around Antartica and the Arctic should be a sensitive indicator of climatic change at the poles. In his Perspective, Wolff highlights the report of Curran et al ., who have compared a potential chemical proxy for sea ice extent from an ice core with satellite records for sea ice extent in the nearby ocean.
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Productivity of Microalgae in Antarctic Sea Ice
Science, 1965Midsummer productivity of Antarctic microalgae, commonly occurring in brown sea ice along the west coast of the Palmer Peninsula, averaged more than 900 milligrams of carbon per cubic meter per hour, with an assimilation number of about 2.6. The rate of photosynthesis increased with light intensity to a maximum of about 18,000 lux, above which some ...
Paul R. Burkholder, Enrique F. Mandelli
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Microbiology of Antarctic Sea-ice: Diatoms of Antarctic Sea-ice as Agents of Primary Production [PDF]
Nature, 1963 Microbiology of Antarctic Sea-ice: Diatoms of Antarctic Sea-ice as Agents of Primary ...
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Primary Production in Antarctic Sea Ice
Science, 1997A numerical model shows that in Antarctic sea ice, increased flooding in regions with thick snow cover enhances primary production in the infiltration (surface) layer. Productivity in the freeboard (sea level) layer is also determined by sea ice porosity, which varies with temperature. Spatial and temporal variation in snow thickness and the proportion
Michael P. Lizotte +4 more
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On the radiation characteristics of Antarctic Sea Ice [PDF]
Atmosphere-Ocean, 2000 Abstract Radiative measurements were carried out continuously during a cruise from Australia to Antarctica during austral summer 1995/96. Both shortwave and longwave radiative fluxes were measured. Some of the results are: The incoming solar radiation had a mean value of 217 W m–2; this was a relatively weak value due to the large amount of fractional ...
Blake Moore +3 more
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Reviews of Geophysics, 2019
Over the 40‐year satellite record, there has been a slight increasing trend in total annual mean Antarctic sea ice extent of approximately 1.5% per decade that is made up of the sum of significantly larger opposing regional trends.
Clare Eayrs +5 more
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Over the 40‐year satellite record, there has been a slight increasing trend in total annual mean Antarctic sea ice extent of approximately 1.5% per decade that is made up of the sum of significantly larger opposing regional trends.
Clare Eayrs +5 more
semanticscholar +1 more source
Dissolved carbohydrates in Antarctic sea ice
Antarctic Science, 2001Concentrations of dissolved monocarbohydrates (MCHO) and polycarbohydrates (PCHO) were analysed in a variety of ice habitats from summer Weddell Sea sea ice (surface ponds, ice cores, gap layers and platelet ice). The dissolved organic carbon (DOC) pool in these habitats was also measured and the contribution of carbohydrate to this pool was assessed ...
Herborg L-M +4 more
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