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Atmospheric nitrous oxide in the pre-800 ka atmosphere from ice cores from the Allan Hills, Antarctica

Creator:

Stock, Marika P.

Abstract:

Nitrous oxide is an important greenhouse gas that has both natural and anthropogenic sources in the modern atmosphere (Ciais et al., 2013). This project expanded the knowledge of the history of atmospheric N2O in the geologic past by measuring N2O concentrations in air trapped in very old polar ice. A...

Resource Type:

Honors College Thesis

Full Text:

_____________________________________________________________________ Christo Buizert, Committee Member, representing College of Earth, Ocean, and Atmospheric
Instability of the Northeast Greenland Ice Stream over the last 45,000 years

Creator:

Larsen, Nicolaj K., Levy, Laura B., Carlson, Anders E., Buizert, Christo, Olsen, Jesper, Strunk, Astrid, Bjork, Anders A., and Skov, Daniel S.

Abstract:

The sensitivity of the Northeast Greenland Ice Stream (NEGIS) to prolonged warm periods is largely unknown and geological records documenting such long-term changes are needed to place current observations in perspective. Here we use cosmogenic surface exposure and radiocarbon ages to determine the magnitude of NEGIS margin fluctuations over the...

Resource Type:

Article

Full Text:

, Christo Buizert 4, Jesper Olsen5, Astrid Strunk 1, Anders A. Bjørk 2,6 & Daniel S. Skov1 The sensitivity