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X-WR-CALNAME;VALUE=TEXT:UMCES Events
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DTSTART:20211107T020000
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UID:calendar.22673.field_date_time.0@www.umces.edu
DTSTAMP:20260405T183358Z
CREATED:20210802T174227Z
DESCRIPTION:October 20\, 2021 3:30pm    \n    \n      \n\n\n    \n\n       
        \nChesapeake Biological Laboratory\n      \n\n\n\n\n  \n\n    \n\n 
              \n\n\n              Topic: Impact of a warm anomaly in the Pa
 cific Arctic region derived from time-series export fluxes\n          \n  
 \n\n    \n\n              \n\n\nAbstract: Unusually warm conditions recent
 ly observed in the Pacific Arctic region included a dramatic loss of sea i
 ce cover and an enhanced inflow of warmer Pacific-derived waters. Moored s
 ediment traps deployed at three biological hotspots of the Distributed Bio
 logical Observatory (DBO) during this anomalously warm period collected si
 nking particles nearly continuously from June 2017 to July 2019 in the nor
 thern Bering Sea (DBO2) and in the southern Chukchi Sea (DBO3)\, and from 
 August 2018 to July 2019 in the northern Chukchi Sea (DBO4). Fluxes of liv
 ing algal cells\, chlorophyll a (chl a)\, total particulate matter (TPM)\,
  particulate organic carbon (POC)\, and zooplankton fecal pellets\, along 
 with zooplankton and meroplankton collected in the traps\, were used to ev
 aluate spatial and temporal variations in the development and composition 
 of the phytoplankton and zooplankton communities in relation to sea ice co
 ver and water temperature. The unprecedented sea ice loss of 2018 in the n
 orthern Bering Sea led to the export of a large bloom dominated by the exc
 lusively pelagic diatoms Chaetoceros spp. at DBO2. Despite this intense bl
 oom\, early sea ice breakup resulted in shorter periods of enhanced chl a 
 and diatom fluxes at all DBO sites\, suggesting a weaker biological pump u
 nder reduced ice cover in the Pacific Arctic region\, while the coincident
  increase or decrease in TPM and POC fluxes likely reflected variations in
  resuspension events. Meanwhile\, the highest transport of warm Pacific wa
 ters during 2017–2018 led to a dominance of the small copepods Pseudocalan
 us at all sites. Whereas the export of ice-associated diatoms during 2019 
 suggested a return to more typical conditions in the northern Bering Sea\,
  the impact on copepods persisted under the continuously enhanced transpor
 t of warm Pacific waters. Regardless\, the biological pump remained strong
  on the shallow Pacific Arctic shelves.\n\n\n\nCBL's Distinguished Scholar
 s Seminar is open to the public. However\, interested participants should 
 be aware that these highly technical seminars are intended for an academic
  audience. Members of the public who would like to learn about featured re
 search efforts are encouraged to participate in CBL's public Science for C
 itizens Seminar Series.
DTSTART;TZID=America/New_York:20211020T153000
DTEND;TZID=America/New_York:20211020T153000
LAST-MODIFIED:20211018T150423Z
SUMMARY:Distinguished Scholar Seminar: Dr. Catherine Lalande (Universite La
 val)
URL;TYPE=URI:https://www.umces.edu/events/distinguished-scholar-seminar-dr-
 catherine-lalande-universite-laval
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