Browsing Dissertations and Theses by Subject "Arctic"
Now showing items 1-20 of 22
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A Geophysical Investigation of the Arctic Sea Ice Surface
The oldest records of the Arctic sea ice pack illustrate a frozen, yet dynamic icescape composed of hummocks and weathered ridges draped in thick snow. In recent decades, the effects of climate change have transformed this ... -
Alaska Native Perspectives on the Governance of Wildlife Subsistence and Conservation Resources in the Arctic
Wildlife resource management in the Arctic is a collaborative effort across many governments, agencies, extractive industries, environmental organizations, and Indigenous communities. Many governments and environmental ... -
An Economic Assessment of Oil Development in the Alaskan Arctic
The Arctic has become a subject of intense political and economic interest as the effects of climate change have led to rapid losses in sea ice and a subsequent expansion of economic opportunities. The circumpolar north ... -
Antarctic Elevation Drives Hemispheric Asymmetry in Polar Lapse Rate Climatology and Feedback
The lapse-rate feedback is the dominant driver of stronger warming in the Arctic than the Antarctic in simulations with increased CO2. While Antarctic surface elevation has been implicated in promoting a weaker Antarctic ... -
Asymmetric Patterns in the Atmosphere and Sea Ice During Polar Cyclones and Their Changes Under Global Warming
The spatial structure of polar cyclones is often considered to be largely symmetrical and distinct from that of midlatitude cyclones, however we use ERA5 reanalysis and a cyclone-centered compositing method to show that ... -
Beluga whale distribution, migration, and behavior in a changing Pacific Arctic
Sea ice is disappearing at unprecedented rates in the Pacific Arctic with potential impacts to ice-associated marine predators that migrate to this seasonally accessible and productive ecosystem. In this dissertation I ... -
Framing Arctic Renewable Energy: A Multi-Stakeholder Analysis
This study examines how various actors frame the shift from oil/gas-based energy to renewable energy for the Arctic regions of the United States and Canada, in light of recent federal policy initiatives, and how domestic ... -
Impact of changing Arctic sea ice extent, sea ice age, and snow depth on sea salt aerosol from blowing snow and the open ocean for 1980-2017
The Arctic is undergoing rapid change: temperature is rising at double the rate as the global average, sea ice extent is declining, the age of sea ice is becoming younger, and snow depth on sea ice is thinning. The effect ... -
Indigenous Contributions to Arctic Biodiversity Conservation
A significant percentage of the earth’s surface is owned, used, and managed by Indigenous peoples, securing Indigenous communities a critical role in current and future biodiversity conservation efforts. Within the Arctic, ... -
Landfast Ice Breakup Timing and Processes Along the Alaska Beaufort Sea Coast
The record minimum in the extent of drifting sea ice on the Arctic Ocean was set in 2012, and the ten lowest retreats of summer sea ice were observed in the last decade. In this thesis we investigate whether there have ... -
Mechanisms of polar-amplified warming: understanding hemispheric and seasonal asymmetries
The Arctic has warmed four times faster than the global average in recent decades. This polar-amplified warming has wide-ranging impacts on local ecosystems and global climate, yet there is still debate over the drivers ... -
Microbial Evolution In Sea Ice: Communities To Genes
(2009-12-15)Microbial communities encased in growing sea ice must contend with the combined stresses of low temperature and high salinity, environmental pressures that only intensify over the course of the winter. This harsh physical ... -
Modeling the changing roles of snow and permafrost in mid- and high-latitude climate systems
The land surface plays a key role in local and regional climates at mid- and high-latitudes as well as in the global climate system. Consequently, changes in snow and permafrost affect other parts of the climate system. ... -
Preindustrial volcanic sulfate aerosol is underestimated in the Arctic: implications for radiative forcing
The Arctic has warmed at a rate of twice the global average since 1980. An estimated sixty percent of greenhouse-gas-induced warming in the Arctic has been offset by aerosols in the past century. However, aerosols are the ... -
Projecting South Korea’s Future as a Middle Power in the Arctic
Because of thinning of Arctic sea ice and economic opportunities such as access to natural resources and new shipping routes caused by climate change, the Arctic has become an area of interest not only of the Arctic states ... -
Risk of Ship Strike and Noise Pollution to Cetaceans in the Bering Strait
As the Arctic sea ice extent decreases due to global climate change, new commercial shipping routes are opening through the Arctic. All of these routes connect the Arctic Ocean to the Pacific Ocean through the Bering Strait, ... -
Seasonality and forcing factors of the Alaskan Coastal Current in the Bering Strait from July 2011 to July 2012
A relatively narrow (~85km) and shallow (~50m) Bering Strait is the only connection between the Pacific and Arctic oceans. Flow through this strait dominates water properties of the Chukchi Sea, impacts Arctic sea ice and ... -
Space-Time Contour Models for Sea Ice Forecasting
This dissertation develops statistical methods for modeling contours. Particular emphasis is placed on forecasting the sea ice edge contour, or the boundary around ocean areas that are ice-covered. Current sea ice forecasts ... -
The ecology, sonic environment, and acoustic occurrence of subarctic baleen whales in the Bering Strait over a decade of change
The southern Chukchi Sea is a productive, shallow continental shelf ecosystem that is undergoing rapid change due to climate warming. Annual sea ice cover has declined significantly, potentially allowing for more temperate ... -
The effect of ENSO on Arctic sea ice as a source of predictability
ENSO is the primary mode of global climate variability but its links to Arctic sea ice are uncertain, in part due to the short observational record. The Community Earth System Model is used to constrain the effect of ENSO ...