The Arctic Ocean Boundary Current along the Eurasian slope and the adjacent Lomonosov Ridge: Water mass properties, transports and transformations from moored instruments

Structure and dynamics of mesoscale eddies over the Laptev Sea continental slope in the Arctic Ocean

“…Approximately the same ratio of eddy polarization was found at mooring M1g, with 12 out of 23 eddies (or 52%) being cyclonic. This almost equal partitioning of eddies between cyclonic and 5 anticyclonic is in contrast with the findings by Woodgate et al (2001), who reported a larger amount of anticyclonic eddies compared to cyclonic eddies at the Lomonosov Ridge, as well as Zhao et al (2014), who found anticyclonic predominance for halocline eddies in the deep EB. We cannot explain this difference in ratios between cyclonic and anticyclonic eddies at the EB slope and in the deep Eurasian and Canadian basins.…”

“…The only comparable prior study of eddies in the AW layer of the EB was by Woodgate et al (2001), who used a collection of yearlong velocity records from three moorings deployed over the Lomonosov Ridge in the eastern EB, to summarize statistics for approximately 50 eddies. The set of eddies reported by Woodgate et al (2001) differ from our set in the following ways.…”

Comparing modeled streamfunction, heat and freshwater content in the Arctic Ocean

“…An analysis of the IOS-model timeseries integration shows representations of observed cooling and freshening events in the Nansen Basin, which are attributed to changes in the outflow from Barents Sea into the Arctic Ocean (e.g. Woodgate et al, 2001). However, it does not seem to appropriately represent warm events, attributed to changes of the inflow at Fram Strait.…”

Origin of freshwater and polynya water in the Arctic Ocean halocline in summer 2007

“…A pulse of shelf waters was observed at the Laptev Sea continental margin in 2005 related to pronounced off-shore winds, while a similar signal was absent in summer 2006 (Bauch et al, 2011). Annual average current velocities of 2.2 and 2.1 cm/s at about 100 m water depth were estimated from moored instruments at the continental slope east of the Laptev Sea and over the Lomonosov Ridge, respectively (Woodgate et al, 2001). A travel time of 1.8 to 2 years is inferred when applying these velocities for a transport of shelf waters (at slightly shallower depth) over the distance of about 1300 km from the Laptev Sea along the continental slope to the position of the observed maxima in brine influence over the Lomonosov Ridge.…”