Arctic Field Projects

Project Title: Physical Impacts on late Season Productivity in Changing Arctic (Award# 1734777)

PI: Shroyer, Emily L (
Phone: (541) 737.1298 
Institute/Department: Oregon State University, College of Earth, Ocean and Atmospheric Sciences 
IPY Project?
Funding Agency: US\Federal\NSF\GEO\OPP\ARC\ANS
Program Manager: Dr. Cynthia Suchman (
Discipline(s): | Oceanography |

Project Web Site(s):

Science Summary:
The Arctic region is experiencing environmental changes that have important implications for the local Arctic ecosystem and the communities that depend on it for their subsistence. For example, a longer season of reduced ice cover suggests the possibility of more marine plant growth. Yet, the rate at which plants grow may be limited by the exhaustion of available nutrients during the longer growing season. Understanding is limited by an incomplete knowledge of how physical processes help replenish nutrients in the euphotic zone late in the season. Important processes span a range of scales, from small scale turbulent mixing to regional scale wind-driven upwelling. This project will pair novel physical and biological measurements to understand the biological response to changes in the physics. The work takes advantage of a scheduled cruise to reduce costs. The project will contribute to STEM workforce enhancement by supporting the development of an early career scientist. Public outreach will be accomplished through a science communication fellowship at the Oregon Museum of Science and Industry. During a cruise to the Chukchi Sea in late summer, instruments to measure fine-scale shear, velocity, and turbulence will be integrated onto a towed vehicle capable of high-resolution sampling over broad areas. The towed vehicle, which is funded through an existing project, allows for continuous in-situ water sampling throughout the water column and is equipped with a suite of comprehensive biological sensors and standard physical sensors. These additions will yield a unique set of simultaneous, comprehensive high-resolution physical and biological observations. The collective analysis of these observations will provide critical insight into biophysical interactions in the changing Arctic.

Logistics Summary:
This project seeks to identify the physical processes that control late season nutrient delivery in the Chukchi Sea. In September 2017, two researchers will augment NSF grant #1504394 (PI Juranek) cruise aboard the R/V Sikuliaq. Researchers will add additional instrumentation to a towed vehicle behind the Sikuliaq. The new instrumentation will measure fine-scale shear, velocity and turbulence in order to provide a clearer perspective on the impact of physical processes on nutrient delivery to the euphotic zone, and thus primary productivity.

All logistics will be organized by the researcher and paid through the grant.
SeasonField SiteDate InDate Out#People
2017Arctic Ocean and Seas - Chukchi Sea09 / 02 / 2017 10 / 03 / 20171

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