Radiatively Active Gases from the N. Atlantic Region and Climate Change (RAGNARoCC)

Andy Watson, UEA

Biogeochemical sections for carbon and CFCs in the ocean interior (Brian King, NOCS)

Planned biogeochemical sections in the N. Atlantic in the period 2012 – 2015. Black meridional sections will be occupied by the USA. Black section from Lisbon- Greenland is the French-Spanish “Ovide” line. Our proposed NOCS-RAGNARoCC sections are in thicker, red lines. Background colour is the anthropogeniccarbon column inventory in 1994 (Sabine et al, 2004)

Quantify and explain the major ocean GHG sources and sinks and their interannual variability in the North Atlantic”.

Observing the Subpolar North Atlantic Programme

The OSNAP line, comprising: (A) German 53°N western boundary array and Canadian shelfbreak array; (B) US West Greenland boundary array; (C) US/UK East Greenland boundary array; (D) Netherlands western Mid-Atlantic Ridge array; (E) US eastern Mid-Atlantic Ridge array; (F) UK glider survey (yellow) over the Hatton-Rockall Bank and Rockall Trough; (G) UK Rockall Trough and Scottish Slope Current array. Red dots: US float launch sites. Blue star: US OOI Irminger Sea global node. Black concentric circles: US sound sources.

Observing the Subpolar North Atlantic Programme (OSNAP)

The OSNAP array. Background: climatological mean salinity (colours, psu); black solid (dashed) lines: isopycnals at 0.05 (0.10) kg m-3 intervals; vertical lines: proposed mooring locations; glider domain: shaded box. Black moorings: direct velocity measurements; gray moorings: both direct velocity measures and endpoints for the geostrophic regions.

Eastern boundary array. Colour contours: 15-year mean meridional velocity (cm s-1, +ve northward) from the FLAME 1/12° model used for the OSSE; thin black contours: potential density (kg m-3); zonally-integrated (eastwards, from zero in the west) meridional transport: thick black line

The UK DWBC moored array, flanked by the WHOI EGC array and the OOI moorings. Key: instrument types; background (colour scale): velocity (+ve northwards

Scottish Association of Marine Science & National Oceanography Centre

Extended Ellett Line Programme

http://www.noc.soton.ac.uk/obe/PROJECTS/EEL/index.php

1. DI223 19962. DI230 19973. DI233 1998

4. DI242 1997

5. DI253 2001

6. P314 20047. CD176 20058. D312 2006

9. D321 2007

10. D340 2009

11. D351 2010

12. D365 2011

US AMOC / UK RAPIDInternational Science Conference

Co-Chairs: Jim Carton, Stuart CunninghamBaltimore, USA : 16-19 July, 2013

Dynamics and Timescales of MOC Variability• Observations (transatlantic arrays, overflows and boundary

current arrays).• SST & AMOC variability.• AMOC in high-resolution models.