RAPID AMOC builds on two earlier programmes, RAPID (2001-2007) included palaeo-oceanography and  RAPID-WATCH (2008-2014) continued the RAPID arrays and model studies.

 

Rapid Climate Change (RAPID) 2001-2007 

The first phase of RAPID saw the start of the RAPID array across the Atlantic at 26° N along with another 38 research projects to study the AMOC and its links with climate over the past 8-9000 years, using palaeo- and present-day observations and a range of modelling studies. Highlights from this research can be found in the RAPID climate change brochure.

This was a £20 million, six-year (2001-2007) programme of the Natural Environment Research Council. The programme aimed to improve our ability to quantify the probability and magnitude of future rapid change in climate, with a main (but not exclusive) focus on the role of the Atlantic Ocean's Thermohaline Circulation.

Dr Meric Srokosz was the Science Co-ordinator for the programme and Dr Val Byfield was the Deputy Science Co-ordinator, having taken over from Dr Christine Gommenginger from 1 April 2005. In autumn 2005 Dr. Craig Wallace joined the team as Knowledge Transfer co-ordinator. They have established a Rapid Climate Change project office at the National Oceanography Centre, Southampton.

 

RAPID-WATCH 2008-2014

The second phase (RAPID-WATCH) concentrated on observations of the present-day AMOC and modelling studies to explore mechanisms controlling its flow and improve our understanding of how AMOC variability and change affects climate in Europe and elsewhere. This phase completed the decade-long time series of AMOC data from 26°N and explored how these observations might be used with other observing systems to improve our ability to predict AMOC variations and their impact on climate at seasonal to decadal and longer time scales

RAPID-WATCH built on RAPID to deliver a decade-long (2004-2014) time series of observations of the Atlantic Meridional Overturning Circulation (MOC). The observations was used with data from other sources to

  • determine and interpret recent changes in the Atlantic MOC,
  • assess the risk of rapid climate change due to changes in the MOC, and
  • investigate the potential for predicting the MOC and its impacts on climate.

This work is carried out in collaboration with the Hadley Centre in the UK, and through international partnerships.

 

Atlantic BiogeoChemical Fluxes 2014-2020 

ABC fluxes allowed us to monitor the large scale transport of carbon and nutrients as a time series for the first time.

Throughout the duration of the project new data was collected and modelled, and existing data used to make calculations of the fluxes of carbon and nutrients associated with the AMOC. Some of the first data was collected from National Oceanic and Atmospheric Administration (NOAA) cruises across the Florida current. The Florida Current is the Northwards branch of AMOC, and so the comparison with new observations from sensors and samplers taken on the Southwards branch of AMOC by the RAPID array allows scientists to calculate how much carbon and nutrients the ocean conveyor loses or takes up on its journey.

NOAA and the Met Office were both project partners on the ABC Fluxes consortium, which is made of the NOC, the Universities of Southampton and Exeter, as well as the Plymouth Marine Laboratory.

ABC fluxes received NERC directed funding under the RAPID-AMOC programme and ran for six years until the 30 September 2020.

 

OSNAP 

OSNAP was a 10-year international program to observe the AMOC in subpolar North Atlantic. The OSNAP observing system had two legs: one from southern Labrador to the tip of Greenland across the mouth of the Labrador Sea (OSNAP West), and the second from the tip of Greenland to Scotland (OSNAP East).
OSNAP complements RAPID to give a more complete picture of Atlantic overturning.

OSNAP schematic

OSNAP also used subsurface floats to trace the pathways of overflow waters from the Nordic seas, and study currents crossing the OSNAP line.