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Study Shows How Volcanism Might Have Affected Earth's Worst Mass Extinctions

Study Shows How Volcanism Might Have Affected Earth's Worst Mass Extinctions
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Geomorphologists map fine sediment in Colorado River to improve sandbar management

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Grain by grain, sandbars are ecologically important to the Colorado River system for humans and wildlife, say scientists. How sand, silt and clay move along and become deposited within the river corridor in the Grand Canyon National Park, downstream from Glen Canyon Dam, has become an important question to a number of government agencies as well as to Native American tribes. The answer impacts the entire Colorado River ecosystem and will help scientists better understand how the Colorado River system works.
Matt Kaplinski, a senior research associate in Northern Arizona University s School of Earth and Sustainability (SES), is the principal investigator on a project, Long Term Monitoring of Sediment Resources and Channel Substrates of the Colorado River in Grand Canyon National Park, designed to study how the sandbars in the river may be preserved through conservation management. ....

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Environmental News Network - NAU Doctoral Student Leads Paleoclimate Study of Precipitation and Sea Ice in Arctic Alaska

NAU Doctoral Student Leads Paleoclimate Study of Precipitation and Sea Ice in Arctic Alaska
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Arctic sea ice is rapidly diminishing due to global warming, and scientists have found that sea ice dynamics have a big impact on circulation and precipitation patterns in Arctic Alaska, which lies at a climatological crossroads between the Arctic and North Pacific oceans.
Arctic sea ice is rapidly diminishing due to global warming, and scientists have found that sea ice dynamics have a big impact on circulation and precipitation patterns in Arctic Alaska, which lies at a climatological crossroads between the Arctic and North Pacific oceans. Recent studies most of which focus on current trends in the region and on what will happen in the future have shown that circulation patterns in the Arctic and North Pacific oceans influence one another. ....

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Doctoral student leads paleoclimate study of precipitation and sea ice in Arctic Alaska

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Arctic sea ice is rapidly diminishing due to global warming, and scientists have found that sea ice dynamics have a big impact on circulation and precipitation patterns in Arctic Alaska, which lies at a climatological crossroads between the Arctic and North Pacific Oceans. Recent studies most of which focus on current trends in the region and on what will happen in the future have shown that circulation patterns in the Arctic and North Pacific Oceans influence one another.
Doctoral candidate Ellie Broadman of Northern Arizona University s School of Earth and Sustainability wanted to learn about this relationship on a longer timescale, so she developed and led a study in Arctic Alaska to investigate it. She is the lead author on a paper detailing her team s findings, Coupled impacts of sea ice variability and North Pacific atmospheric circulation on Holocene hydroclimate in Arctic Alaska, which was recently published in the prestigious journal ....

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