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Upcoming Events

Tuesday, March 3, 12:00-1:00 pm

Spatial Analysis Discussion Group

Downtown Public Library, Large Meeting Room

“Leveraging the time domain in Juneau’s LiDAR data”

Bruce Simonson, GIS Manager, City and Borough of Juneau

Abstract: This presentation will show how information in LiDAR point clouds can be used to visualize and quantify lags in the development of tide levels along the length of Gastineau Channel during cycles of flood and ebb tides. The timestamps and feature classifications in the LiDAR point cloud in Juneau’s 2013 data acquisition, when coupled with concurrent observed tide levels at the primary NOAA tide gauge in Juneau, can be used to show how tide levels progress along the channel.  Specifically, it is possible to identify ground (exposed) points which “should be under water” during an incoming tide, but aren’t (yet) covered by the tide.  Similarly, for ebb tides, information in the point cloud can be used to identify points which “should be dry”, but where the tide has not yet gone out. The presentation will begin with a brief traditional “time series” raster analysis of the terminus of the Mendenhall Glacier, using LiDAR digital elevation models from 2002, 2012, and 2013. LiDAR point classifications will be introduced through a brief overview of the use of point cloud data for feature extraction (e.g., building footprints). The dataset coupling tide levels from the Juneau NOAA gauge with concurrent 2013 LiDAR point data will then be presented, with an analysis and discussion of initial findings of lags in the development of tides along the channel. Several software packages for visualizing and analyzing LiDAR point data will be demonstrated, including LASTOOLS, the FUGRO viewer, and perhaps a bit of ESRI and ENVI software.  Some python programming will be covered as well.

Wednesday, March 4, 12:00 - 1:00 pm

ACRC Brown Bag Seminar

Juneau Forestry Sciences Lab Conference Room

"Southeast Alaska Tribal Toxins (SEATT): a partnership to monitor harmful algal blooms”

Chris Whitehead, Sitka Tribe of Alaska

Abstract: Southeast Alaska Tribal Toxins (SEATT) is a collaboration between SE Tribes and NOAA to monitor harmful algal blooms at specific locations in southeast.  The monitoring includes weekly phytoplankton sampling, cellular and shellfish toxin analysis using the receptor binding assay. Southeast Alaska Tribes are depending on this program to assess their tribe’s vulnerability for human health risks associated with marine biotoxins in shellfish and to establish subsistence harvest management plans.

Friday, March 6, 2:30 – 3:30 pm

Special UAS Faculty Candidate Seminar

Juneau Forestry Sciences Lab Conference Room

“What can isotopic records from tree rings tell us about environmental change in the Pliocene and today?”

Adam Csank, Desert Research Institute

Abstract: Tree ring widths have long been used as a proxy for climate reconstructions for periods up to tens of thousands of years in the past. In recent decades there has been increasing interest in understanding what information can be obtained from the isotopic composition of tree ring cellulose, and on applications of this technique to periods in the geologic past. In this talk I will provide some background into what tree-ring isotopes can tell us using specific examples from my past work reconstructing climates using sub-fossil wood from the Arctic and from current projects looking at more modern records from Alaska and Colorado.

Friday, March 6, 3:30 - 4:30 pm

UAF Fisheries Seminar

SFOS Lena Point, Rm 101

"Forage fish in marine ecosystems: combining strategies to sample patchy populations"

Mayumi Arimitsu, USGS

Abstract: Forage fish are small-schooling fish that play a critical role in marine ecosystems because they transfer energy from lower to upper trophic levels (e.g., seabirds, marine mammals and large commercial fish). Monitoring changes in forage fish abundance over time is difficult because they are generally very mobile, have patchy distributions, and short life spans. As part of the Gulf Watch Alaska program, efforts are underway to develop robust methods for detecting change in forage fish populations in Prince William Sound. This talk will give an overview of efforts to combine aerial and hydroacoustic survey methods to quantify forage fish over time, and also demonstrate the utility of predator diets as indicators of forage fish stocks throughout the Gulf of Alaska. 

Friday, March 6, 6:30 and 8 pm

Mendenhall Glacier Visitor Center Fireside Lecture

"Exquisite design: humpback whale anatomy"

Michelle Ridgway and Kate Wynne, UAF

Abstract: The untimely death of a young humpback whale allowed marine ecologist Michelle Ridgway and marine mammal biologist Kate Wynne to examine the body and glean insights about feeding adaptations and other details of one of Alaska’s favorite animals.

ACRC Spring Semester Brown Bag Lecture Series

The Alaska Coastal Rainforest Center is hosting a Brown Bag Lunchtime Lecture series during the spring semester. Talks will be on Wednesdays from noon—1pm at the Forestry Sciences Lab adjacent to the UAS Juneau campus. The lunchtime speaker series is meant to be an informal avenue for graduate students, faculty, and professionals to present new and existing research and scholarship, brainstorm ideas, and have the opportunity to receive feedback in an informal setting.  We invite all interested persons to join us to learn about the exciting research projects and collaborations that are happening in Southeast Alaska.

2015 is the International Year of Soils.  This finite natural resource is important for food security and the ecosystem.  One Wednesday each month will focus on soils science to help raise awareness and promote the sustainability of our limited soil resources.





Dave D'Amore

Pacific Northwest Research Station

Soils sustain life: How I learned to love dirt, and why you should too!


Sandra Lindstrom,

University of British Columbia

Oceanographic, meteorological and historical determinants of seaweed biogeography along the north Pacific Rim, with emphasis on the northern Gulf of Alaska


Kim Homan, AK DOT & PF

Got Data?  A tour of four Alaska data portals:  Alaska Science Catalog, Southeast Alaska GIS Library, Alaska Ocean Observing System, and DataBasin





Dave D'Amore

Pacific Northwest Research Station



Karen Blejwas, ADF&G

What do Southeast Alaska's bats do in the winter?


Chris Whitehead, Sitka Tribe

Southeast Alaska Tribal Toxins (SEATT) Program


Dave D'Amore

Pacific Northwest Research Station






Link Olson, UA Museum

Marmots and climate change: Known knowns and unknown knowns


Joel Trubilowisz

Univ of British Columbia

Predicting hydrologic regime change in the Alaska and BC coastal rainforest


Di Johnson

Pacific Northwest Research Station

Evaluation of microsites promoting seedling regeneration in the alpine treeline ecotone:  A global perspective


Amanda Sesko, UAS

Ethnic tourism in Alaska:  What it means for attitudes and perceptions of Alaska Native people


Jeff Frederick, UAF

Alpine thermal dynamics and associated constraints on the behavior of mountain goats in Southeast Alaska


Dave D'Amore

Pacific Northwest Research Station



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