Tundra

Tundra News -- ScienceDaily The Tundra Biome. Read the latest research on the tundra including information on tundra ecology, energy resources and the effects of climate change on this biome.

  • Ocean predicts future northwestern European and Arctic climate
    on June 21, 2017 at 2:01 pm

    There is a clear potential for practical and useful predictions of northwestern European and Arctic climate based on the state of the ocean, new research indicates. […]

  • Polar bears' declining mercury levels likely due to climate-related shifts
    on June 14, 2017 at 1:18 pm

    To understand how human activities are affecting the planet, scientists often study the health of animals in the wild. Now a new study finds that the levels of mercury in some polar bears are declining. But rather than heralding a drop in mercury in the environment, the decrease could indicate how climate change has led the animals to shift foraging habits, which has affected their diets and weight. […]

  • Large Canadian Arctic climate change study cancelled due to climate change
    on June 13, 2017 at 7:06 pm

    The Science Team of the Canadian Research Icebreaker CCGS Amundsen has cancelled the first leg of the 2017 Expedition due to complications associated with the southward motion of hazardous Arctic sea ice, caused by climate change. […]

  • Iqaluit could start running out of fresh water by 2024
    on June 12, 2017 at 3:53 pm

    Without action, the supply of fresh water in Iqaluit will begin to dwindle by 2024 due to climate change and increased demand, new research has found. […]

  • How the Arctic Ocean became saline
    on June 6, 2017 at 3:27 pm

    The Arctic Ocean was once a gigantic freshwater lake. Only after the land bridge between Greenland and Scotland had submerged far enough did vast quantities of salt water pour in from the Atlantic. […]

  • Domes of frozen methane may be warning signs for new blow-outs
    on June 5, 2017 at 7:19 pm

    Several methane domes, some 500m wide, have been mapped on the Arctic Ocean floor. They may be signs of soon-to-happen methane expulsions that have previously created massive craters in a near-by area. […]

  • High release of strong greenhouse gas nitrous oxide found from northern peatlands at permafrost thaw
    on May 31, 2017 at 1:14 pm

    Permafrost thaw may greatly increase emissions of nitrous oxide (N2O) from northern permafrost peatlands, research shows. Nitrous oxide is a strong greenhouse gas: 300 times more powerful per unit mass in warming the climate than carbon dioxide. […]

  • Spotted owls benefit from forest fire mosaic
    on May 31, 2017 at 12:44 pm

    Fire is a crucial part of the forest ecosystem on which threatened spotted owls rely, but climate change and decades of fire suppression are changing the dynamics of these forests. A new study examines California spotted owl habitat use and shows that while owls avoid the badly burned areas left behind by massive stand-replacing fires, they benefit from habitat that includes a mosaic of burned patches of different sizes and degrees of severity. […]

  • Previously, on Arctic warming
    on May 30, 2017 at 6:48 pm

    Arctic warming occurred in the early 20th century due to the warming phases -- 'interdecadal variability mode' -- of both the Pacific and Atlantic oceans, suggests new research. […]

  • Some grizzly bears appear to target railways for foraging in Canadian national parks
    on May 24, 2017 at 6:18 pm

    Spilled grain, rail-killed ungulates, and the effects on other species of increased light and warmth may all attract grizzly bears to forage along railways in Canada's mountain parks, which could increase their risk of being hit by trains, according to a study. […]

  • Are wolverines in the Arctic in the climate change crosshairs?
    on May 24, 2017 at 5:11 pm

    Will reductions in Arctic snow cover make tundra-dwelling wolverines more vulnerable to climate change than previously thought? That's a question scientists hope an innovative method described in a new study will help answer. […]

  • Rare tooth find reveals horned dinosaurs in eastern North America
    on May 23, 2017 at 12:25 pm

    A chance discovery in Mississippi provides the first evidence of an animal closely related to Triceratops in eastern North America. The fossil, a tooth from rocks between 68 and 66 million years old, shows that two halves of the continent previously thought to be separated by seaway were probably connected before the end of the Age of Dinosaurs. […]

  • GIS: A powerful tool to be used with caution
    on May 18, 2017 at 2:40 pm

    A recent study provides a new perspective on the severe impacts of escalating climate change on the heritage resources of Canadian Arctic. Referring to the application of Geographic Information System analytical methods in assessing the threat of shoreline erosion to archaeological sites, it details steps taken to review the quality of the GIS model in light of a discrepancy with rates observed during actual survey visits. […]

  • Measuring the impact of a changing climate on threatened Yellowstone grizzly bears
    on May 11, 2017 at 6:19 pm

    A new analysis of Yellowstone grizzly bear diets reveals that grizzlies in the region continue to feed upon the products of an endangered tree species currently declining at the hands of climate change. Such changes are forcing some bears to look for more varied food sources. The researchers say the results call for increased monitoring efforts in the region. […]

  • Different places warm at different paces
    on May 9, 2017 at 12:39 pm

    One of the robust features of global warming under increasing greenhouse gas concentrations is that different places warm at different paces. It turns out that the fast warming in each region has its own cause. Ocean heat transport links subpolar and Arctic warming, but that is not the whole story. […]

  • Can barnacle geese predict the climate?
    on April 18, 2017 at 10:17 pm

    The breeding grounds of Arctic migratory birds such as the barnacle goose are changing rapidly due to accelerated warming in the polar regions. They won't be able to keep up with this climate change unless they can somehow anticipate it. A research team employed computer models to assess the future of the geese and their young. […]

  • Arctic river ice deposits rapidly disappearing
    on April 18, 2017 at 3:14 pm

    Climate change is causing thick ice deposits that form along Arctic rivers to melt nearly a month earlier than they did 15 years ago, a new study finds. […]

  • Methane seeps in the Canadian high Arctic
    on April 13, 2017 at 6:03 pm

    Cretaceous climate warming led to a significant methane release from the seafloor, indicating potential for similar destabilization of gas hydrates under modern global warming. A field campaign on the remote Ellef Ringnes Island, Canadian High Arctic, discovered an astounding number of methane seep mounds in Cretaceous age sediments. […]

  • Huge permafrost thaw can be limited by ambitious climate targets
    on April 10, 2017 at 4:40 pm

    Nearly 4 million square kilometers of frozen soil -- an area larger than India -- could be lost for every additional degree of global warming experienced, warn scientists. Global warming will thaw about 20% more permafrost than previously thought, they add – potentially releasing significant amounts of greenhouse gases into the Earth’s atmosphere. But these investigators also suggest that the huge permafrost losses could be averted if ambitious global climate targets are met. […]

  • Scientists uncover isotopic fingerprint of nitrous oxide emissions from Arctic tundra
    on April 7, 2017 at 1:18 pm

    For the first time, scientists present 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 the Arctic, a region that is particularly sensitive to climate change. […]

  • The Arctic Ocean is becoming more like the Atlantic
    on April 6, 2017 at 6:39 pm

    The eastern Arctic Ocean is becoming more like the Atlantic Ocean, a new study combining remote sensing and local data finds. […]

  • Microbial colonizers of Arctic soils are sensitive to future climate change
    on April 3, 2017 at 1:13 pm

    Ecosystems created by melting glaciers in the Arctic are sensitive to climate change and human activity, new research indicates. […]

  • Melting sea ice may lead to more life in the sea
    on March 30, 2017 at 3:52 pm

    Every year an increasing amount of sea ice is melting in the Arctic. This can start a chain reaction, which leads to increased production of algae and hence more food for creatures in the sea. […]

  • Solving the mystery of the Arctic's green ice
    on March 29, 2017 at 7:02 pm

    In 2011, researchers observed something that should be impossible — a massive bloom of phytoplankton growing under Arctic sea ice in conditions that should have been far too dark for anything requiring photosynthesis to survive. So, how was this bloom possible? Using mathematical modeling, researchers found that thinning Arctic sea ice may be responsible for these blooms and more blooms in the future, potentially causing significant disruption in the Arctic food chain. […]

  • Sea ice extent sinks to record lows at both poles
    on March 22, 2017 at 6:31 pm

    The Arctic sea ice maximum extent and Antarctic minimum extent are both record lows this year. Combined, sea ice numbers are at their lowest point since satellites began to continuously measure sea ice in 1979. […]

  • How to conserve polar bears -- and maintain subsistence harvest -- under climate change
    on March 15, 2017 at 10:23 pm

    A properly-managed subsistence harvest of polar bears can continue under climate change, according to analysis that combines sea-ice forecasts with a polar bear population model. […]

  • With climate change, shrubs and trees expand northwards in the Subarctic
    on March 15, 2017 at 4:56 pm

    Shrubs expand in the tundra in northern Scandinavia. And it is known that fixation of nitrogen from the air is in the tundra to a high degree performed by cyanobacteria associated with mosses. Also enhanced nitrogen fixation stimulates plant growth. New research shows that as taller shrubs expand into the tundra, nutrients in their leaf litter will either promote or reduce the nitrogen fixation, depending upon which shrub species that will dominate. […]

  • When the sea ice melts, juvenile polar cod may go hungry
    on March 15, 2017 at 1:45 pm

    Polar cod fulfil a key role in the Arctic food web, as they are a major source of food for seals, whales and seabirds alike. But the polar cod themselves might soon be the hungry ones. […]

  • Looking for 'fingerprints' at the intersection of weather and climate
    on March 13, 2017 at 8:08 pm

    Scientists have found the seasonal 'fingerprints' of Arctic sea ice, El Nino, and other climate phenomena in a new study that probes the global interactions between weather and climate. […]

  • Rapid decline of Arctic sea ice a combination of climate change and natural variability
    on March 13, 2017 at 8:08 pm

    The dramatic decline of Arctic sea ice in recent decades is caused by a mixture of global warming and a natural, decades-long atmospheric hot spot over Greenland and the Canadian Arctic. […]