Atmospheric sea-salt and halogen cycles in the Antarctic
Atmospheric sea-salt and halogen cycles play important roles in atmospheric science and chemistry including cloud processes and oxidation capacity in the Antarctic troposphere.
Cross-ecosystem nutrient subsidies in Arctic and alpine lakes: implications of global change for remote lakes
Environmental change is continuing to affect the flow of nutrients, material and organisms across ecosystem boundaries. In this review, we synthesize current knowledge of cross-ecosystem nutrient subsidies between Arctic and alpine lakes and their surrounding terrain, cryosphere, and atmosphere.
Distributions of water-soluble ions in size-aggregated aerosols over the Southern Ocean and coastal Antarctica
To investigate mass size distributions of ionic species in marine aerosols, size-segregated (0.056–18 μm in aerodynamic diameter) aerosols were collected over the Southern Ocean during the 28th Chinese National Antarctic Research Expedition cruise.
Paper
Interannual, summer, and diel variability of CH4 and CO2 effluxes from Toolik Lake, Alaska, during the ice-free periods 2010–2015
CH4 and CO2 fluxes from Toolik Lake obtained for the first time with eddy covariance during ice-free periods 2010–2015.
Anaerobic respiration pathways and response to increased substrate availability of Arctic wetland soils
Divergent soil biogeochemical conditions will determine the fate and pathways of labile carbon released during permafrost thaw, thereby influencing the production of greenhouse gas mixtures and radiative forcing of tundra soils.
Photodecay of guaiacol is faster in ice, and even more rapid on ice, than in aqueous solution
Guaiacol photodegradation rate constants in solution, liquid-like regions in ice (frozen solutions), and at the air–ice interface (vapor-deposited to snow).
Paper
Composition and photo-reactivity of organic matter from permafrost soils and surface waters in interior Alaska
Yedoma permafrost soils are especially susceptible to abrupt thaw due to their exceptional thickness and high ice content.
Iron and iron-bound phosphate accumulate in surface soils of ice-wedge polygons in arctic tundra
Iron accumulation in shallow tundra soils promotes adsorption of phosphate from soil solution, sequestering high concentrations of potentially bioavailable phosphorus.
Identifying patterns and sources of anthropogenic trace metals in the Argentine Central Andes by using snow samples and an atmospheric dispersion model
This study presents the first local measurements of metals in snow from the Argentine Central Andes.
Paper
Assessing the prevalence, products, and pathways of dissolved organic matter partial photo-oxidation in arctic surface waters
Isotope tracer experiments reveal that rates of dissolved organic matter partial photochemical oxidation are considerably underestimated in arctic surface waters.
Emerging investigator series: influence of marine emissions and atmospheric processing on individual particle composition of summertime Arctic aerosol over the Bering Strait and Chukchi Sea
Composition of individual atmospheric particles reveals the influence of marine sources, terrestrial sources, and anthropogenic sources on atmospheric chemistry in the changing Alaskan Arctic.
Influence of climate and biological variables on temporal trends of persistent organic pollutants in Arctic char and ringed seals from Greenland
Climate change may affect temporal trends of persistent organic pollutants (POPs) in Arctic wildlife.
Investigating the presence and persistence of volatile methylsiloxanes in Arctic sediments
Uncertainties in the physicochemical properties of volatile methylsiloxanes have resulted in substantial uncertainties in calculations of concentrations persistence. Choosing the right set of properties seems crucial for making accurate predictions.
About this collection
This Themed Collection, Guest Edited by Rose Cory and Kerri Pratt (University of Michigan), showcases studies on chemical processes in sea ice, snow, glaciers, ice sheets and permafrost soils. This includes atmospheric chemistry (atmospheric aerosols and trace gases) biogeochemistry (chemical weathering and organic matter chemistry) as well as laboratory, field and modeling studies.
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