The hydrographic research during NABOS 2013 expedition

Sergey KirillovAndrey PniushkovIlona Goszczko

Ekaterina BloshkinaJohn Guthrie

andIgor Ashik + Vladimir Ivanov

Water sampling with Rosette carrousel L-ADCP

L-ADCP

CTD with auxiliary sensors

SBE9plus supplies Conductivity, Temperature and Depth measurements with the rate of 24 Hz. In terms of vertical resolution of profile it gives about 4 cm depth intervals.

Additional auxiliary sensors:- oxygen- fluorescence- turbidity- transparency- nitrate- altimeter

Expendable Probes

eXpendable CTD Profiler (XCTD)

eXpendable BathyThermograph (XBT)

31 XBT and 18 XCTD were launched

2008

2009

St.Anna Trough

St.Anna Trougth is one of the key Arctic “hot spots” where cocktail of different water masses is blended

Aksenov et al. 2011

RV “Professor Molchanov”, July 11-12, 2013

RV “Akademik Fedorov”, September 18-19, 2013St.Anna Trough

Atlantic Waters form a specific vertical stratification with temperature maximum below the polar mixed layer

The typical vertical structure within the Arctic Ocean deep

basin interior

81N 90E 95E 105E 110E 126E 142E

Modification of FSBW and BSBW along the Eurasian continental slope

The lateral mixing induced by double-diffusive processes in the frontal areas

The changes in AWs from 1970s to 2000s

AW core temperatures AW upper boundary depth

2000s AW core temperature anomalies

1970s

2000s

The changes in AWs at 126E cross-slope transect

The recent thermal state of AWs at 126E is still above an average (the core temperature anomalies are about +0.6) but warming has been ceased since ~2006

vs 1950-1993 vs 2006-2009

The station lists are available in .pdf format

…thank to Anna and Nastia

Thank you for your attention