Virtual Alaska Weather Symposia

  1. Wednesday, February 27, 2019 at 11:00 AM AKST
    Speaking: Huan Meng, NESDIS/Center for Satellite Applications and Research & Wes Adkins, NWS/Juneau, Alaska Weather Forecast Office
    An over land snowfall rate (SFR) product has been produced operationally at NOAA/NESDIS since 2012. The product utilizes measurements from passive microwave sensors aboard eight polar-orbiting satellites managed by NOAA, NASA, EUMETSAT, and DMSP. The SFR algorithm consists of a statistical snowfall detection component and a 1DVAR-based physical snowfall rate estimation component. The product has been validated against gauge observations and radar snowfall rate estimates. NASA SPoRT has also made it available in AWIPS and provides the product to some NWS WFOs at near real-time. This seminar will include a description of the SFR product, algorithm validation, and its assessment at the Juneau and Anchorage WFOs.

    # vimeo.com/350189264 Uploaded 3 Views 0 Comments
  2. Wednesday, March 13, 2019 at 11:00 AM AKDT
    Speaking: Ed Plumb, NWS

    Coastal flooding and erosion from strong storms pose a significant threat to many Alaska communities. The National Weather Service (NWS) is collaborating with state, regional, local, and tribal organizations to improve impact-based decision support to communities before and during coastal storms. The NWS is also in the process of improving warning messages to rural Alaska in order to effectively communicate threat level, convey risk from storm surge, forecaster confidence, and potential impacts of incoming storms. The NWS is working to incorporate local terminology and place names, traditional knowledge of storm impacts, and storm observations into coastal flood warnings for communities. In order to accomplish this, the NWS is engaging in various workshops, meetings, and performing community visits to interact directly with residents and gain a better understanding of threats to their community. This presentation will highlight recent success the NWS has had in improving two-way communication and warnings to western Alaska communities during coastal flood events.

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  3. Wednesday, December 19, 2018 at 11:00 AM AKST
    Speaking: Jeff Key Center for Satellite Applications and Research (STAR), NOAA/NESDIS

    The AVHRR Polar Pathfinder Extended (APP-x) climate data record provides cloud properties, surface temperature and albedo, sea ice thickness, and radiative fluxes over the Arctic and Antarctic from 1982 through the present. APP-x was recently used in two studies of absorbed solar radiation at the surface. One study compares changes in sea ice extent in the Arctic and Antarctic and examines their effects on the shortwave radiation budget. It was found that increasing shortwave absorption over the Arctic Ocean is not balanced by trends in the Antarctic. The second study compares the ice-albedo and snow-albedo feedbacks in the Arctic. The positive trend of solar absorption over the Arctic Ocean is more than double that over Arctic land, and the magnitude of the ice-albedo feedback is four times that of the snow-albedo feedback in summer. Therefore, decreasing sea ice cover, not changes in terrestrial snow cover, has been the dominant radiative feedback mechanism over the last few decades.

    # vimeo.com/350188756 Uploaded 4 Views 0 Comments
  4. Wednesday, November 14, 2018 at 11:00 AM AKST
    Speaking: Kristin Timm, George Mason University

    There is a growing body of social science related to communicating climate change and related weather hazards. This research offers several insights on how different audiences perceive and understand climate change and what communication approaches to adopt with each, whether you are trying to raise awareness, discuss risks, or encourage people to adopt a new behavior. This talk will provide a summary of important ideas from the field of climate change communication, with a focus on practical recommendations for weather and climate professionals. Additionally, it will describe several high quality, evidence-based resources that are now freely available to help climate communicators.

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  5. Wednesday, October 3, 2018 at 11:00 AM AKDT
    Speaking: Kristy C. Carter, Iowa State University
    Snowfall distribution in southern Alaska during large snowfall events (>12inches/day) is complex and dependent on several small-scale factors. Common synoptic patterns among large snowfall events and cities were studied to create a snow climatology for seven cities in southern Alaska based on the predominant wind flow at the surface and aloft, and the location of the surface low and 500mb height field. Results aid in understanding the synoptic set-up for large snowfall events in each city and provide insight for increased skill in future forecasting applications. In addition, a snow avalanche climatology was created for two ski areas to understand avalanche occurrences and their triggers in southern Alaska.

    # vimeo.com/350188386 Uploaded 4 Views 0 Comments

Virtual Alaska Weather Symposia

IARC Group Plus

This partnership between the Geographic Information Network of Alaska (GINA) and the NOAA National Weather Service (NWS) brings cutting edge satellite based presentations to a broad audience and complements GINA’s and NWS’s deep pool of speakers and topics.

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