The ACORN series is a monthly online seminar series by PerCS-Net members on topics related to Arctic coastal research. Become a PerCS-Net member to receive notifications of upcoming talks and links to join the online conversation.
Talks are scheduled for the last Wednesday of the month (September to May) at 1 p.m. Eastern Time. ACORN will break during the summer, but stay tuned for updates on professional development workshops coming in Fall 2024. Please contact us if you would like to present at a future meeting!
See below for abstracts and links for upcoming ACORN talks and recordings of past talks.
Up Next
29 May 2024 | Join on Zoom 9 AM AKST / 1 PM EST / 7 PM CEST
Cansu Demir, a PhD Candidate and Fulbright Scholar at the Jackson School of Geosciences, University of Texas at Austin, will present on Spatiotemporal dynamics of groundwater flow and transport along Arctic coasts: Exploring subterranean estuaries, groundwater discharge, and organic-inorganic matter fluxes. Save the date and check back for the abstract and Zoom link.
ACORN will break during the summer and be back in September. Let us know if you would like to present this fall.
Past Talks
24 April 2024 | Watch
Examining the influence of permafrost thaw and coastal erosion on the Hamlet of Tuktoyaktuk, Northwest Territories
Rebecca Lee | Geological Survey of Canada
ABSTRACT (click on image below to enlarge for reading)
27 March 2024 | Watch Passcode: @qgv1V?a (Tip: if pasting the passcode doesn’t work, try typing it in)
Shoreline and Bluff Edge Segmentation using Unsupervised Deep Learning Approach to Detect Arctic Coastal Change
ABSTRACT (click on image below to enlarge for reading)
28 February 2024 | Watch Passcode: y^0y^vF* (Tip: if pasting the passcode doesn’t work, try typing it in)
A frozen history of meandering: Mapping and modeling ice-wedge polygons on point bars
Zoltán Sylvester | Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin
ABSTRACT (click on image below to enlarge for reading)
29 November 2023 | Watch Passcode: &q*2z@Xr (Tip: if pasting the passcode doesn’t work, try typing it in)
The Alaska Arctic Observatory and Knowledge Hub (AAOKH)
Elizabeth Mik’aq Lindley and Roberta Glenn-Borade | University of Alaska Fairbanks
ABSTRACT (click on image below to enlarge for reading)
![ACORN Series talk abstract: Nov 19, 2023, with Roberta Glenn-Borade and Elizabeth Mik'aq Lindley](\"https://permafrostcoasts.org/wp-content/uploads/2023/11/Glenn-Lindley_Nov23-432x432.jpg\")
25 October 2023 | Watch Passcode: %D4d2Wdu (Tip: if pasting the passcode doesn’t work, try typing it in)
Devloping high-resolution records of storminess from the southern Bering Sea
Reyce Bogardus, PhD candidate | University of Alaska Fairbanks, Arctic Coastal Geoscience Lab
ABSTRACT (click on image below to enlarge for reading)
27 September 2023 | Watch Passcode: cdd3X^.r (Tip, if pasting code doesn’t work, try typing it in)
Thermal phenology of Beaufort Sea Lagoons: 1982-2022
Julio Ceniceros | University of Texas at El Paso / NOAA Center for Earth System Sciences and Remote Sensing Technologies fellow
ABSTRACT (click on image below to enlarge for reading)
24 May 2023 | Watch Passcode: @D#Sz=?6 (Tip: if pasting the passcode doesn’t work, try typing it in)
Invasive Vaucheria aff. compacta (Xanthophyceae) and its distribution over a high Arctic tidal flat in Svalbard – How microorganisms affect large-scale changes within intertidal systems and protect sea shore ecosystems against erosion
Josef Elster | Centre for Polar Ecology, University of South Bohemia, Czech Republic
ABSTRACT (click on image below to enlarge for reading)
The impact of wind on groundwater dynamics along a microtidal Arctic lagoon
Julia Guimond | Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, USAABSTRACT (click on image below to enlarge for reading):
29 March 2023 | Watch passcode: A^B@7×1+ (Tip: if pasting the passcode doesn’t work, try typing it in)
How could coastal erosion change the Arctic Ocean’s CO2 uptake from the atmosphere? — an Earth system modelling approach
David Nielsen, Postdoc | Ocean Biogeochemistry Group, Max Planck Institute for Meteorology, Hamburg, Germany
ABSTRACT: Click on image below to enlarge for reading:
22 February 2023 | Watch (passcode: AVt96%zr)
Barrier islands influence the assimilation of terrestrial energy in nearshore fishes
Ashley Stanek, Fish and Aquatic Ecology Program, USGS Alaska Science Center
ABSTRACT: Click on image below to enlarge for reading.
25 January 2023 | Watch
Glacial isostatic adjustment speeds past and future Arctic subsea permafrost thaw
Roger Creel, Frederieke Miesner,Stiig Wilkenskjeld, Jacqueline Austermann, Pier Paul Overduin
ABSTRACT: Subsea permafrost forms when sea-level rise submerges terrestrial permafrost in the Arctic. Although year-round sea ice has until recently hindered measurement of subsea permafrost distribution, best estimates indicate that over 2.5 million km2 of permafrost exists under the Arctic continental shelf, with some areas of the Laptev and Kara seas underlain by permafrost that is more than 700 meters thick. Understanding subsea permafrost is important because it stores organic carbon and methane, which, if thawed, may reach the atmosphere as greenhouse gasses. Sea-level variations control subsea permafrost distribution. Yet to date, no subsea permafrost model has included local sea level that differs from the global mean due to glacial isostatic adjustment (GIA). Here we present the first model of pan-Arctic subsea permafrost over the last 400,000 years to incorporate GIA. This model allows us to estimate present-day subsea permafrost extent and explore the effect that relative sea level has on permafrost evolution. Additionally, we extend the subsea permafrost simulation 1000 years into the future for the emissions scenarios outlined in the International Panel on Climate Change’s sixth assessment report. Our future projections enable us to map the vulnerability of Arctic subsea permafrost to climate warming.
