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team discovers a significant role for nitrate in the arctic landscape




nitrogen, an essential plant nutrient, is most readily absorbed by plants in its ammonium and nitrate forms. because of the very low nitrate levels found in arctic tundra soil, scientists had assumed that plants in this biome do not use nitrate. but a new study co-authored by four marine biological ...



nasa's arctic ecosystem science flights begin




the arctic boreal vulnerability experiment (above) has started the second year of its campaign, which will use airborne instruments to monitor ecosystems in alaska and northwestern canada. the campaign will study forests and lakes like this one, outside of fairbanks, alaska, where methane is being r...



arctic, major fishing nations agree no fishing in arctic, for now




sea ice is seen from nasa's operation icebridge research aircraft in march, 2017, above greenland, which is among parties to the arctic ocean commercial fishing moratoriumarctic and major fishing nations, including china, announced friday that they have agreed to a moratorium on commercial fishing i...



team discovers a significant role for nitrate in the arctic landscape




image: ecologists have discovered that arctic tundra plants take up much more nitrate than previously thought. some species, such as the pink flowering plant polygonum bistorta, take up even more nitrate... view more credit: allen chartierwoods hole, mass. -- nitrogen, an essential plant nutrient,...



ecosystems are getting greener in the arctic




image: current and predicted changes in areas around the world where vegetation responds strongly to warming. shaded areas represent areas where vegetation growth was limited by cold temperatures at the start... view more credit: trevor keenan and william riley/berkeley labin recent decades, scien...



arctic climate change study canceled due to climate change




this story originally appeared on newsweek and is part of the climate desk collaboration.the canadian research icebreaker ccgs amundsen, an arctic expedition vessel, will not be venturing north for its planned trip this year. the highly anticipated voyage aimed to monitor and understand the effe...



arctic clouds highly sensitive to air pollution




a rare case of forest fire smoke interacting with clouds in the arctic in july 2012. contour lines indicate carbon monoxide concentrations in the atmosphere. credit: modis/nasain 1870, explorer adolf erik nordenskiöld, trekking across the barren and remote ice cap of greenland, saw something most p...



arctic clouds highly sensitive to air pollution




image: a rare case of forest fire smoke interacting with clouds in the arctic in july 2012. contour lines indicate carbon monoxide concentrations in the atmosphere. view more credit: modis/nasain 1870, explorer adolf erik nordenskiöld, trekking across the barren and remote ice cap of greenland, s...



scientists lack vital knowledge on rapid arctic climate change




arctic climate change research relies on field measurements and samples that are too scarce, and patchy at best, according to a comprehensive review study from lund university in sweden. the researchers looked at thousands of scientific studies, and found that around 30% of cited studies were cluste...



in warming arctic, major rivers show surprising changes in carbon chemistry




over the past several decades, the arctic has begun to show signs of significant ecological upheaval. the rate of warming in the arctic is nearly twice the global average, and those changes are triggering a cascade of destabilizing environmental effects. ice is melting, permafrost is thawing, and ex...



arctic, major fishing nations agree no fishing in arctic, for now




arctic and major fishing nations, including china, announced friday that they have agreed to a moratorium on commercial fishing in arctic waters before a fishery in the icy region is even feasible.



rise in arctic ocean acid pinned on climate change




the clue? scientists were looking at concentrations of aragonite, a mineral that can't form in highly acidic water. they noticed that parts of the western arctic ocean have lower than expected aragonite levels.climate change isn't the only factor -- the team notes that changes in ocean currents have...



scientists uncover isotopic fingerprint of n2o emissions from arctic tundra




a new study from the university of eastern finland presents, for the first time, the isotopic fingerprint of nitrous oxide produced by arctic soils. the finding opens new avenues for predicting future trends in atmospheric nitrous oxide as well as in identifying climate change mitigation actions in ...



warm winter events in the arctic are becoming more frequent, lasting longer




arctic winter warming events - winter days when temperatures peak above minus 10 degrees celsius - are a normal part of the arctic climate over the ice-covered arctic ocean, but new research finds they are becoming more frequent and lasting longer than they did three decades ago.



beluga whales dive deeper, longer to find food in arctic




reductions in sea ice in the arctic have a clear impact on animals such as polar bears that rely on frozen surfaces for feeding, mating and migrating. but sea ice loss is changing arctic habitat and affecting other species in more indirect ways, new research finds.



nasa begins latest airborne arctic ice survey




an unusual hole in the sea ice cover over the arctic ocean and unexplored areas of the bedrock beneath the greenland ice sheet are among the targets for this year's mapping of arctic ice conditions by nasa's operation icebridge airborne mission.



fracking comes to the arctic in a new alaska oil boom




arctic lands and waters hold irresistible allure for global oil companies. despite opposition from environmental groups and president obama's 2016 ban on drilling in federal arctic waters, exploration in alaska has revealed massive new volumes of oil.



greener fuels may not make shipping safer – here's why




the shipping industry has been slow to use greener fuels. credit: louisevest/flickr, cc by-saglobal shipping emits 2% of the world's carbon dioxide emissions and this is projected to increase. no wonder there have been widespread calls for the shipping industry to reduce its hazardous emissions by r...



tracking driftwood gives researchers insight into past arctic ocean changes




piece of driftwood on a raised beach in billefjorden, svalbard. in a new study, researchers used driftwood to reconstruct arctic sea ice extent during the holocene. credit: marc macias-fauriawood from trees that fell into arctic-draining rivers thousands of years ago is giving scientists a detailed ...



fifth international symposium on arctic research




image: the fifth international symposium on arctic research (isar-5) was held in tokyo from january 15 to 18, 2018, the largest symposium in asia's non-arctic nations. the participants included 344 persons... view more credit: © nipr"fifth international symposium on arctic research (isar-5)," the...



biocatalysts are a bridge to greener, more powerful chemistry




new research from the university of michigan life sciences institute is building a bridge from nature's chemistry to greener, more efficient synthetic chemistry.



expansion of global forests reflects well-being, not rising co2, experts say




the surprising, steady expansion of forests in many countries is a reflection of national well-being and does not constitute a benefit of rapidly rising levels of atmospheric carbon dioxide, experts say. on the planet as a whole, forests and other terrestrial ecosystems have become greener, which se...



alpine ecosystems struggle to recover from nitrogen deposition




what happens to high mountain ecosystems when you take away air pollution? not much, not very quickly. a new cu research study finds that degraded alpine ecosystems showed limited recovery years after long-term inputs of human-caused nitrogen air pollution, with soil acidification and effects on bio...



scientists find surprising evidence of rapid changes in the arctic




scientists have found surprising evidence of rapid climate change in the arctic: in the middle of the arctic ocean near the north pole, they discovered that the levels of radium-228 have almost doubled over the last decade.



nasa completes survey flights to map arctic ice




operation icebridge, nasa's longest-running airborne mission to monitor polar ice change, concluded this year's springtime survey of arctic sea and land ice on may 2. the flights, which began on march 22, covered the western basin of the arctic ocean and greenland's fastest-changing glaciers.