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The Yukon–Kuskokwim Delta of Alaska,USAis a globally important region for numerous avianspecies including millions of migrating and nesting waterbirds.However, data on the current spatial distributionof critical nesting areas and the importance of environmental variables in the selection of nest locations aregenerally lacking for waterbirds in this region.We modeled nest densities for 6 species of geese and eiders thatcommonly breed on the Yukon–Kuskokwim Delta, including cackling goose (Branta hutchinsii minima),emperor goose (Chen canagica), black brant (B. bernicla nigricans), greater white-fronted goose (Anser albifronsfrontalis), spectacled eider (Somateria fischeri), and common eider (S. mollissima).Thedata...
Categories: Data, Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: BIRDS, BIRDS, CLIMATE CHANGE IMPACT ASSESSMENT MODELS, CLIMATE CHANGE IMPACT ASSESSMENT MODELS, DELTAS, All tags...
Understanding the causes of relative sea level rise requires knowledge of changes to both land (uplift and subsidence) and sea level. However, measurements of coastal uplift or subsidence are almost completely lacking in western Alaska. This project provided precise measurements of prioritized benchmarks across the Western Alaska geography, improving the network of published tidal benchmark elevations, allowing for tidal datum conversion in more places, and providing a necessary component for improved inundation studies in coastal communities and low-lying areas. The project’s map of vertical velocities (uplift/subsidence) of western Alaska (see ‘Final Project Report’ & ‘Vertical Velocity Map’, below) will be combined...
This project resulted in an extensive mapping of coastal change along the entire coastline of the Western Alaska Landscape Conservation Cooperative (LCC). The work provides important baseline information on the distribution and magnitude of landscape changes over the past 41 years. The extent of change to the coastline and to coastal features, such as spits, barrier islands, estuaries, tidal guts and lagoons, was known to be substantial in some areas along the coast (e.g., portions of the Yukon–Kuskokwim Delta), although the extent of change along the full Bering Sea coast was not well documented. With this analysis, changes can be summarized for different land ownerships or other units to assess the extent of recent...
Categories: Data; Tags: BARRIER ISLANDS, BARRIER ISLANDS, BARRIER ISLANDS, BARRIER ISLANDS, COASTAL AREAS, All tags...
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When resources are spatially and temporally variable, consumers can increasetheir foraging success by moving to track ephemeral feeding opportunitiesas these shift across the landscape; the best examples derive from herbivore–plant systems, where grazers migrate to capitalize on the seasonal waves ofvegetation growth. We evaluated whether analogous processes occur in watershedssupporting spawning sockeye salmon (Oncorhynchus nerka), askingwhether seasonal activities ofpredators and scavengers shift spatial distributionsto capitalize on asynchronous spawning among populations of salmon. Bothglaucous-winged gulls and coastal brown bears showed distinct shifts in theirspatial distributions over the course of the summer,...
David is a professor in the Department of Geography at University of Victoria, a position he has held since 2010. For the six years prior to that, he was a research scientist and professor at UAF’s International Arctic Research Center/Department of Atmospheric Sciences. He also held Post-Doc positions at Bedford Institute of Oceanography, focusing on environmental forcing of arctic coastal regions (2002-2004), and the University of Ottawa, focusing on high-arctic data issues and computer methods for hemispheric paleo-climate reconstruction (2000-2002). His PhD focused on high-arctic climate issues His primary interests centre around the “environmental forcing” of coastal zones and the analysis of large-scale weather...
Bering Sea storms introduce various environmental conditions that adversely affect human activity and infrastructure in the coastal zone and the ecosystems they depend upon. Storm impacts include interactions with sea ice in all potential states: large floes, shore-fast ice, and incipient sea-ice in frazil or slush state. In particular, sea ice can act to enhance or mitigate the impacts of adverse marine state, even as the event is occurring. Such occurrences should be part of a forecasting regimen, however scientific work has not been conducted on this phenomena, with the result that a physical model describing the formation of slush ice berms does not exist. To arrive at such a model requires visits to and input...
Lack of complete snow cover for the past 3 winters in southwestern Alaska has forced agencies to postpone conducting moose surveys due to the likelihood of underestimating the population. For most regions of Alaska, the variation in moose sightability during suboptimal conditions has not yet been quantified. Because scientists are predicting less snowfall in this region over the long term, research was initiated to estimate sightability correction factors (SCFc) to apply to abundance estimates.
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The goal of the Bristol Bay Regional Water Temperature Monitoring Network is to generate water temperature data which meet the information needs of individual cooperators while simultaneously generating data relevant for assessing changes in stream and lake temperatures at a regional scale. The Network’s short-term (3-5 year) objectives are to: increase data collecting capacity in the Bristol Bay region; institute the use of minimum data collection standards to produce data useful for the analysis of regional trends; compliment and leverage other monitoring efforts; update and submit site-specific metadata annually to the Alaska Online Aquatic Temperature Site project (a statewide metadata clearinghouse); and...
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The primary purpose of this project is to acquire long-term data series ontemperature of selected lakes to support management of nursery habitat of lakerearingjuvenile sockeye salmon (Oncorhynchus nerka) in relation to climatechange. We adopted protocol developed by the National Park Service (NPS) toestablish moored all-season vertical temperature monitoring arrays in eight lakesof Kodiak, Togiak, and Alaska Peninsula/Becharof National Wildlife Refuges(NWR) in summer and fall 2011. We recorded lake temperature at a resolution of0.02°C on an hourly basis at various depth strata between lake surfaces and lakebottoms. Monitoring sites were visited annually or biannially to extract data andto service monitoring equipment....
Nearshore bathymetry is a vital link that joins offshore water depths to coastal topography. Seamlesswater depth information is a critical input parameter for reliable storm surge models, enables the calculationof sediment budgets, and is necessary baseline data for a range of coastal development decisions.Bathymetric data collection capabilities of an active coastal geohazard field program operatedby the Alaska Division of Geological & Geophysical Surveys (DGGS) were expanded in 2012. Resultantdatasets presented in this report include nearshore bathymetric measurements of critical shallow-watercoastal areas in the vicinity of six western Alaska communities: Gambell, Golovin, Hooper Bay, Savoonga,Shishmaref, and...
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Global environmental change has influenced lake surface temperatures, a key driver of ecosystem structureand function. Recent studies have suggested significant warming of water temperatures in individual lakesacross many different regions around the world. However, the spatial and temporal coherence associatedwith the magnitude of these trends remains unclear. Thus, a global data set of water temperature isrequired to understand and synthesize global, long-term trends in surface water temperatures of inlandbodies of water. We assembled a database of summer lake surface temperatures for 291 lakes collectedin situ and/or by satellites for the period 1985–2009. In addition, corresponding climatic drivers (airtemperatures,...
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In 2012 Bristol Bay Native Association (BBNA) in partnership with Bristol Bay Area Health Corporation (BBAHC) and Alaska Native Tribal Health Consortium (ANTHC) began evaluating connections between climate change impacts and health. The purpose, to encourage wellness and to adapt to changes in the Bristol Bay region. Of special importance for community wellness are the changes occurring to the natural environment and the effects on food and water security. This is a synthesis of findings from the project.
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CLIMATE CHANGE IMPACT ASSESSMENT MODELS, CLIMATE CHANGE IMPACT ASSESSMENT MODELS, COASTAL AREAS, COASTAL AREAS, EROSION, All tags...
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The Yukon-Kuskokwim Delta of Alaska is a globally important region for numerous avian species including millions of migrating and nesting waterbirds. Climate change effects such as sea level rise and increased storm frequency and intensity have the potential to impact waterbird populations and breeding habitat in the near future. In order to determine the potential impacts of these climate-mediated changes, it is important to monitor the current spatial distribution of important nesting areas and understand the importance of environmental variables in the selection of nest locations. To do this, we modeled nest density for 15 species or composite species of waterbirds that commonly breed on the Yukon-Kuskokwim Delta,...
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: BIRDS, BIRDS, CLIMATE CHANGE IMPACT ASSESSMENT MODELS, CLIMATE CHANGE IMPACT ASSESSMENT MODELS, DELTAS, All tags...
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How local geomorphic and hydrologic features mediate the sensitivity of stream thermal regimesto variation in climatic conditions remains a critical uncertainty in understanding aquatic ecosystem responsesto climate change.We used stable isotopes of hydrogen and oxygen to estimate contributions of snow and rainfallto 80 boreal streams and show that differences in snow contribution are controlled by watershed topography.Time series analysis of streamthermal regimes revealed that streams in rain-dominated, low-elevation watershedswere 5–8 times more sensitive to variation in summer air temperature compared to streams draining steepertopography whose flows were dominated by snowmelt. This effect wasmore pronounced...
Western Alaska is a remote region with many small, isolated communities situated in low-lying coastal environments that are sensitive to variations in local relative sea level (RSL). Quantification of RSL variation requires measured vertical velocities for both tectonic motion (onshore component) and the ocean surface (offshore component). During the summers of 2013 and 2014, campaign GPS surveys of geodetic benchmarks were undertaken to produce statistically significant velocity measurements of the tectonic component of sea level change for the region. Occupations of tidal benchmarks were also conducted to compare historic tidal records from the mid-1900s to more recent data. Preliminary results from the GPS survey...
This project resulted in an extensive mapping of coastal change along the entire coastline of the Western Alaska Landscape Conservation Cooperative (LCC). The work provides important baseline information on the distribution and magnitude of landscape changes over the past 41 years. The extent of change to the coastline and to coastal features, such as spits, barrier islands, estuaries, tidal guts and lagoons, was known to be substantial in some areas along the coast (e.g., portions of the Yukon–Kuskokwim Delta), although the extent of change along the full Bering Sea coast was not well documented. With this analysis, changes can be summarized for different land ownerships or other units to assess the extent of recent...
Categories: Data, Image; Tags: BARRIER ISLANDS, BARRIER ISLANDS, BARRIER ISLANDS, BARRIER ISLANDS, COASTAL AREAS, All tags...
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The Western Alaska LCC was one of the second tier LCCs to get established (officially started in 2011). With funding from FWS, Western AK LCC staff were hired in 2010 and they held a series of nine (9) meetings in October and November 2010 throughout the western Alaska region to speak with potential partners and solicit input on early directions for the LCC. Meetings were held in Cold Bay, King Salmon, Dillingham, Anchorage, Kodiak, Bethel, Fairbanks, Kotzebue, and Nome. Over 100 people participated in the series of local meetings, including representatives of federal and state agency staff, non-­‐profit organizations, Alaska Native Tribes and organizations, academia, and local residents. The Arctic Research Consortium...
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A high spatial resolution storm surge model was developed for the YK Delta area to assess biological impacts of storm surges under current and future climates. Storm surges are expected to be more frequent and more severe in the YK Delta area due to climate change and sea level rise. The biological impacts in the YK Delta due to the changed storm surges could be extreme.The model was assessed with respect to measured water level data at the coast and, where available, spatial extent of inundation, for 6 storms from the period 1992 to 2011. In total, inundation projections from 9 historical storms (5 from the assessment + 4 others) were developed. For each storm, an spatial inundation index (time-integral of water...
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ARCHAEOLOGICAL AREAS, ARCHAEOLOGICAL AREAS, Academics & scientific researchers, COASTAL AREAS, COASTAL AREAS, All tags...


map background search result map search result map Starting the Western AK LCC - Scoping meetings Webinar: Moored All-Season Vertical Temperature Arrays in Lakes on Kodiak, Togiak, and Alaska Peninsula/Becharof National Wildlife Refuges Watershed geomorphology and snowmelt control stream thermal sensitivity to air temperature. Climate Change and Health Effects in the Bristol Bay Region of Alaska: Final Project Synthesis Report. Webinar: Effects of winter climate and watershed features on summer stream temperatures in Bristol Bay, Alaska Model outputs Riding the crimson tide: mobile terrestrial consumers track phenological variation in spawning of an anadromous fish Implementation Plan: Bristol Bay regional water temperature monitoring network. A global database of lake surface temperatures collected by in situ and satellite methods from 1985–2009 Predicting Waterbird Nest Distributions on the Yukon–Kuskokwim Delta of Alaska Webinar (February 19, 2014) Predicting Waterbird Nest Distributions on the Yukon–Kuskokwim Delta of Alaska Webinar (February 19, 2014) Model outputs Watershed geomorphology and snowmelt control stream thermal sensitivity to air temperature. Riding the crimson tide: mobile terrestrial consumers track phenological variation in spawning of an anadromous fish Webinar: Effects of winter climate and watershed features on summer stream temperatures in Bristol Bay, Alaska A global database of lake surface temperatures collected by in situ and satellite methods from 1985–2009 Webinar: Moored All-Season Vertical Temperature Arrays in Lakes on Kodiak, Togiak, and Alaska Peninsula/Becharof National Wildlife Refuges Implementation Plan: Bristol Bay regional water temperature monitoring network. Climate Change and Health Effects in the Bristol Bay Region of Alaska: Final Project Synthesis Report. Starting the Western AK LCC - Scoping meetings