The Arctic carbon cycle is speeding up, study reports
When people think of the Arctic, snow, ice and polar bears come to mind. Trees? Not so much. At least not yet.
Environment
Aug 6, 2018
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Page 5 - News tagged with tundra
Gaining a bird's eye view of the greening of the Arctic
University of Virginia terrestrial ecologist Howie Epstein has won a $607,000 NASA grant to use Earth-observing satellite data to assess how vegetation diversity is changing in the Arctic tundra.
Earth Sciences
May 8, 2018
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Piecing together our planet pixel by pixel
At first glance, the high-resolution images of the polygons look like the lacy skin of a cantaloupe melon – perhaps not what would be expected of images of the Arctic tundra. But this characteristic feature of the tundra ...
Environment
Apr 4, 2018
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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 ...
Environment
Mar 23, 2018
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Research brief: Shifting tundra vegetation spells change for arctic animals
For nearly two decades, scientists have noted dramatic changes in arctic tundra habitat. Ankle-high grasses and sedges have given way to a sea of woody shrubs growing to waist- or neck-deep heights. This shrubification of ...
Environment
Mar 6, 2018
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A better understanding of the high levels of mercury pollution in the Arctic tundra
Scientists have been searching for over two decades to explain how the Arctic is contaminated with toxic mercury pollution. A new study sheds light on the likely process, while warning of its hazards to humans and the environment.
Environment
Feb 12, 2018
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How fires are changing the tundra's face
Climate change takes a heavy toll on the tundra, increasing the probability of extreme droughts. As a result, the frequency of fires in forests, bogs and even wetlands continues to rise. In addition, the northern areas of ...
Ecology
Dec 13, 2017
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Reindeer grazing protects tundra plant diversity in warming climate
Climate warming reduces the number of plant species in the tundra, but plant-eating animals, such as reindeer and voles, can turn this negative effect into something positive. The results of a study coordinated from Umeå ...
Ecology
Sep 4, 2017
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Study finds toxic mercury is accumulating in the Arctic tundra
Vast amounts of toxic mercury are accumulating in the Arctic tundra, threatening the health and well-being of people, wildlife and waterways, according to a UMass Lowell scientist investigating the source of the pollution.
Environment
Jul 12, 2017
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Lightning sparking more boreal forest fires
A new NASA-funded study finds that lightning storms were the main driver of recent massive fire years in Alaska and northern Canada, and that these storms are likely to move farther north with climate warming, potentially ...
Earth Sciences
Jun 27, 2017
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