Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

River-shelf interactions during Spring floods in the coastal Beaufort Sea

07.12.2006
Multi-year study provides insights to possible future responses to environmental change in the arctic

Spring floods carry 40 to more than 80% of the annual amounts of river water, suspended sediment and dissolved solids from Alaska to the coastal Beaufort Sea.

In this study, river water and suspended sediment were collected from the Sagavanirktok and Kuparuk rivers during the spring Floods of 2001, 2002, 2004 and 2006. Concentrations of dissolved Cu, Fe, Pb and some other trace metals, along with DOC, generally increased by 3-to-25-fold within 3 to 7 days of onset of the melt water event due to thawing of ponds and upper soil layers.

These peak concentrations then decreased over the next several days. Only minor shifts in concentrations of major ions were observed during the two to three week flood period. Interannual variations in flow patterns and peak concentrations of dissolved trace elements and suspended sediments were influenced by total flow and cooling and refreezing of flood water during any given year The transfer and fate of riverine inputs in the ocean was influenced by river volume and the presence of 2m thick ice in the coastal Beaufort Sea during spring. River flow was traced up to 15km offshore in 0.5 to 2m thick layers under the ice.

Water from the two rivers and from sea ice has geochemical characteristics that are different from ambient seawater as well as from each other that facilitated tracking of under-ice mixing. Conservative and some non-conservative mixing were observed for selected constituents across the freshwater-seawater interface; however, shifting concentrations of some dissolved substances in river water during the flood period complicated the tracking process.

Observed variations in river composition, flow and mixing with coastal seawater during this multi-year study provide insights to possible future responses to environmental change in the arctic.

Karen Rhine | EurekAlert!
Further information:
http://www.fit.edu

More articles from Earth Sciences:

nachricht Impacts of mass coral die-off on Indian Ocean reefs revealed
21.02.2017 | University of Exeter

nachricht How much biomass grows in the savannah?
16.02.2017 | Friedrich-Schiller-Universität Jena

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Organ-on-a-chip mimics heart's biomechanical properties

23.02.2017 | Health and Medicine

Light-driven reaction converts carbon dioxide into fuel

23.02.2017 | Life Sciences

Oil and gas wastewater spills alter microbes in West Virginia waters

23.02.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>