For Alaska, LEO and GEO satellites have advantages and disadvantages, however other traditional observation networks are sparse in the state, so it is important to utilize the best qualities of each platform to fully diagnose and monitor hazardous natural events. This presentation will show several examples of how data from each of these satellite platforms can be complementary in this process.
Speaker: Erin Trochim, University of Alaska Fairbanks (UAF) Satellite records from the mid 1980s onward provide the opportunity to examine surface water distribution and change in permafrost regions. This is important because the nature of permafrost can create conditions where change is likely to occur but hydrology conditions can be highly variable. We will discuss…
The Juneau National Weather Service Forecast office remotely hosted two NOAA Hollings Scholars during the summer of 2020. This webinar will cover the work of those two scholars.
We will be presenting some new data and information products, based on the needs of federal and state agency managers, coastal communities, tribes, and private industry, and invite webinar participants and other residents of western Alaska to join our conversation about their observations and their needs.
Speakers: Gay Sheffield (Sea Grant), Donna Hauser (IARC), Rick Thoman (ACCAP) Summer 2019 was another remarkable year for the Bering and Chukchi Sea regions, with record early sea ice loss in the spring, very warm oceans and late freeze-up producing wide ranging impacts, from the ocean food web to individual and community activities. This webinar…
Speaker: Ken TapeResearch Associate Professor Geophysical Institute Snow, Ice and Permafrost Group University of Alaska Fairbanks Using time series of satellite images, we have observed hundreds of new beaver ponds in tundra regions of western and northern Alaska. This talk will describe beaver movement into arctic tundra regions and some predicted implications for tundra ecosystems.
Part of the UAF Northwest Campus Strait Science SeriesIn-person at Grand Hall - NWC Education CenterOr join remotely via Zoom meeting information below:https://alaska.zoom.us/j/665398184Meeting ID: 665 398 184Dial by your location +1 669 900 6833 US (San Jose) +1 929 205 6099 US (New York) Meeting ID: 665 398 184 Find your local number: https://zoom.us/u/aNdnrwuH
The Hollings Scholars utilized an existing database of daily wildfire acreage back to at least the 1990s. They identified sub-monthly periods of rapid wildfire growth in both boreal and tundra ecosystems and performed analysis of associated atmospheric conditions and synoptic weather patterns using online and UAF available meteorological reanalysis data. This presentation will present the findings of their work.
Speaking: Derek Sikes, University of Alaska Museum The University of Alaska Museum Insect Collection is a biorepository for vouchers from varied projects throughout the state. A number of examples of possible and potential climate change impacts on the terrestrial invertebrates of Alaska will be presented. These will cover various taxa including snow-field associated rove beetles,…
The Cooperative Institute for Research in the Atmosphere (CIRA), established at Colorado State University in 1980, works closely with NOAA to develop algorithms and applications based on its cadre of environmental satellites. Here, we present some of these applications, including the science behind them, with an eye toward their relevance to the Alaska Region.
The presentation will cover the background of the MiRS retrieval approach, and then move on to discussion of retrieval products, user applications, and recent work aimed at scientific improvements. Where possible, examples will be chosen that are relevant to users in high-latitude regions such as Alaska.
Volcanic clouds, which are a major aviation hazard, are complex and the background environment in which they reside is often complicated as well. Much of the complexity is due to the multi-composition nature of volcanic clouds, which frequently consist of some combination of volcanic ash, volcanic gases, and hydrometeors. Thus, volcanic cloud remote sensing is very challenging.
This presentation will focus on mechanical river ice breakup and the historical evolution of our understanding of this topic. The presentation will include discussions of ice cover formation and the typical resulting ice structure, wave-ice interaction, the physics of the cracking, and the current status of our understanding of breakup.
In this presentation, the factors leading to this strong wind event will be explored in-depth. In addition, a climatology of the top 10 wind events to occur in Kodiak City will be presented and classified based on similar synoptic and mountain wave properties. Finally, a statistical gap wind tool has been developed to help forecasters anticipate wind events which will be shared.
Jointly sponsored and hosted by the Alaska Fire Science Consortium Speaker: Randi Jandt, Alaska Fire Science Consortium Randi Jandt talked about the evolution of Alaska firefighting practices--field and management--over the past 50 years. We are starting to be aware of the changes in climate and in Alaska forests: is the wildfire "problem" the same one…
We combined data collected over the last 40 years to estimate the indirect effects of sea otters on ecosystem carbon production and storage across their North American range from Vancouver Island to the western edge of the Aleutian Islands. We find that sea otters, by suppressing sea urchins, substantially increase kelp ecosystem productivity and have a strong influence on kelp carbon flux and storage.