Feature Publication Archive
Stabeno, P., N. Kachel, C. Ladd, and R. Woodgate (2018): Flow patterns in the eastern Chukchi Sea: 2010–2015. J. Geophys. Res., 123(2), 1177–1195, doi:10.1002/2017JC013135.
This paper describes currents in the Chukchi Sea and their relationship to ice and winds. The Chukchi Sea consists of a broad shallow shelf, extending more than 800 km northward from its southern boundary at Bering Strait to the shelf break bounding the Arctic basin. The primary source of water to this shelf is Bering Strait, and much of the flow exits the Chukchi shelf through two canyons—Barrow in the east and Herald in the west. The inflow of Pacific water through Bering Strait provides heat, freshwater, salt, and nutrients to the Arctic Ocean via the Chukchi shelf.
From 2010 to... more »
Stabeno, P.J., J.T. Duffy-Anderson, L.B. Eisner, E.V. Farley, R.A. Heintz, and C.W. Mordy (2017): Return of warm conditions in the southeastern Bering Sea: Physics to fluorescence. PLoS ONE, 12(9), e0185464, doi: 10.1371/journal.pone.0185464, Open access.
From 2007 to 2013, the southeastern Bering Sea was dominated by extensive sea ice and below-average ocean temperatures. In 2014 there was a shift to reduced sea ice on the southern shelf and above-average ocean temperatures. These conditions continued in 2015 and 2016. During these three years, the spring bloom at mooring site M4 (57.9°N, 168.9°W) occurred primarily in May, which is typical of years without sea ice. At mooring site M2 (56.9°N, 164.1°W) the spring bloom occurred earlier especially in 2016. Higher chlorophyll fluorescence was observed at M4 than at M2. In addition, these... more »
Mordy, C.W., A. Devol, L.B. Eisner, N. Kachel, C. Ladd, M.W. Lomas, P. Proctor, R.N. Sambrotto, D.H. Shull, P.J. Stabeno, and E. Wisegarver (2017): Nutrient and phytoplankton dynamics on the inner shelf of the eastern Bering Sea. J. Geophys. Res., 122(3), 2422–2440, doi: 10.1002/2016JC012071.
In the Bering Sea, the nitrogen cycle near Nunivak Island is complicated due to limited nutrient replenishment across this broad shelf, and substantial nitrogen loss through sedimentary processes. While diffusion at the inner front may periodically support new production, the inner shelf in this region is generally described as a regenerative system. This study combines hydrographic surveys with measurements of nitrogen assimilation and benthic fluxes to examine nitrogen cycling on the inner shelf, and connectivity between the middle and inner shelves of the southern and central Bering Sea... more »
Van Pelt, T.I., J.M. Napp, C.J. Ashjan, H.R. Harvey, M.W. Lomas, M.F. Sigler, and P.J. Stabeno (2016): An introduction and overview of the Bering Sea Project: Volume IV. Deep-Sea Res. II, 134, 3–12, doi:10.1016/j.dsr2.2016.09.002.
“…the National Science Foundation (NSF) and the North Pacific Research Board (NPRB) created a novel partnership in 2007 to support an ecosystem-scale study to examine how a changing climate and changing sea-ice conditions affect the EBS ecosystem, from physics and chemistry to lower trophic level organisms (e.g., plankton) to humans. The “Bering Sea Project” integrated two major research programs, the NSF-funded Bering Ecosystem Study (BEST) and the NPRB-funded Bering Sea Integrated Ecosystem Research Program (BSIERP... more »
Studying where some of the smallest organisms in the ocean are located can be difficult when they are found beneath the surface. In the late summer and early fall, phytoplankton in the Chukchi Sea are usually found in thin, patchy layers that can only be observed using shipboard surveys. In a collaborative effort between PMEL’s EcoFOCI group and the University of Alaska Fairbanks, scientists were able to map the distribution of subsurface phytoplankton using a novel high-resolution towed instrument platform. A significant fraction of the phytoplankton biomass is contained in these layers,... more »