We hope you can join us TOMORROW, Thursday, May 30 at 2:30 PM
Eastern. John Crusius, Research Scientist with USGS Coastal and
Marine Geology Program, aligned with Alaska Science Center, housed in
Seattle at University of Washington School of Oceanography will
present: "Impacts of melting glaciers on nutrient supply and coastal
ecosystems of the northern Gulf of Alaska".
See below or the attached pdf for more details and the registration
link (registration is required to join the webex):
"Impacts of melting glaciers on nutrient supply and coastal
ecosystems of the northern Gulf of Alaska"
Thursday, May 30 at 2:30 PM Eastern
Description: The northern Gulf of Alaska (GoA) maintains a productive
ecosystem, with commercially important fisheries. Virtually all of
the many glaciers that line the northern GoA coast are retreating,
yet the impacts on the marine ecosystem are poorly understood. This
project carried out a set of frequent field observations in a network
of tributaries of the Copper River, the single largest source of
fresh water to the GoA (and a watershed with substantial glacial
coverage). We also carried out a set of research cruises on the
continental shelf and slope to the south. Iron is a nutrient that
limits biological productivity in parts of the GoA, while nitrate is
limiting in nearshore areas. Our work examined the sources of nitrate
and iron during different seasons, and their ecosystem responses.
Glacier melt impacts transport of bioavailable iron from both rivers
and dust, as fine glacial particles are an important source in each
case. An additional source is resuspended continental shelf
sediments. Dust is transport in the autumn from riverbed sediments
from glacierized watersheds by strong winds and transported hundreds
of km offshore. Nitrate is known to have a marine source, originating
in deep-winter mixing and upwelling. High productivity is observed
along the entire coastal transect in spring in response to high
concentrations of both nitrate and iron. Climate impacts on the
ecosystem will be discussed with the aid of a high-resolution
northern GoA coupled physical ecosystem model that incorporates river
inputs and oceanographic processes.
YOU MUST REGISTER TO JOIN THIS WEBINAR VIA WEBEX
<https://doilearn.webex.com/doilearn/k2/j.php?ED=27133673&UID=43769103&HMAC=387fb8009d05ed8ccc4cf4dea0ac1fbe027f51a8&RT=MiMxMQ%3D%3D&FM=1>https://doilearn.webex.com/doilearn/k2/j.php?ED=27133673&UID=43...
Once submitted, your name will be added to the registry for the
webinar and you will receive an email with instructions on how to
join the webinar via the WebEx platform. For closed captioning during
the webinar, at the start time of the event, please login to your
event by clicking on the link below:
<http://fedrcc.us/Enter.aspx?EventID=2133906&CustomerID=321>http://fedrcc.us//Enter.aspx?EventID=2133906&CustomerID=321
THIS WEBINAR WILL BE RECORDED
If you cannot attend the webinar, it will be posted, with closed
captioning, approximately 1-2 weeks after the presentation is given
and posted on the NCCWSC website:
<https://nccwsc.usgs.gov/webinar/186>https://nccwsc.usgs.gov/webinar/186
UPCOMING NCCWSC WEBINARS
For the schedule of upcoming webinars in the NCCWSC Climate Change
Science and Management Webinar Series, please click here:
<https://nccwsc.usgs.gov/webinars>https://nccwsc.usgs.gov/webinars
If you have any questions regarding the NCCWSC webinars, please contact:
Ashley Fortune: 304.876.7361
<mailto:[email protected]>[email protected]
Or, Holly Padgett: 703.648.4081 <mailto:[email protected]>[email protected]
