North Atlantic Observing System

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Presentation transcript:

North Atlantic Observing System Gerard McCarthy NERC/NOC

NACLIM: An Overview North Atlantic Climate European Commission Framework 7 Collaborative Project § Duration: 4 years + 3 Months, Oct. 2012 – Jan. 2017 § Research Focus: Assessment of decadal climate forecasts § Research Focus: Continuation of moored transport measurements § Partner: 18 participating institutions (+1 Third party) from 9 European countries 4 universities 12 research institutions 2 national operational institutes § 5 Core themes, 12 work packages § Project costs: 11 M€ § EU contribution: 8.6 Mio M€

Moored Observations in NACLIM Greenland-Scotland Ridge OSNAP family Rekyannes ridge 54ºN array RAPID at 26ºN

Greenland-Scotland Ridge Long-term moorings: Greenland-Scotland Ridge Greenland-Scotland Ridge: Denmark Strait Iceland-Faroe Atlantic inflow Faroe-Shetland Channel Faroe Bank Channel

Denmark Straits About half dense water overflow from Nordic Seas through Denmark Straits Monitored since 1996 Mean of 3.4 Sv (var: 2.0 Sv) No trend Jochumsen et al., Variability of the Denmark Strait overflow: moored time series from 1996-2011, JGR Oceans, 2013 1996 1998 2000 2002 2004 2006 2008 2010

Faroe-Bank Channel Around 2 Sv of deep water through the FBC Monitored since 1995 Hansen and Osterhus, Faroe Bank Channel overflow 1995–2005, Prog. Oc., 2007

Faroe-Shetland Channel 2.7±0.5Sv mean strength Timseries from 1992 (combined moorings and altimetry) Berx et al., 2013, Combining in situ measurements and altimetry to estimate volume, heat and salt transport variability through the Faroe–Shetland Channel. Oc. Sci.

GSR totals Total inflow across GSR is 7 Sv Overflows (FBC+DS) is 6 Sv No trend in transport Noticeable increase in temperature Shetland branch Faroe branch Iceland branch

NACLIM and OSNAP Rekjyannes Ridge The 53ºN array

The 53ºN Array Located at exit of Labrador Sea Joint Canadian (C1-C3,K7), US (K7) and German NACLIM PI: Johannes Karstensen (GEOMAR)

Rejkyannes Ridge 4 moorings on west flank of the RR Will be deployed this year (1 year delayed) for 3 times 1 year measuring velocities, T and C NACLIM PI Laura de Steur (NIOZ)

NACLIM and OSNAP Rekjyannes Ridge The 53ºN array 53ºN Array (J. Karstensen-GEOMAR) Rekjyannes Ridge (L. De Steur-NIOZ) Extras: Labrador sea mooring; SAMS activities Rekjyannes Ridge The 53ºN array

NACLIM Extras Predictability of ocean surface state: the SST in the Nordic Seas Predictability of the atmosphere Sea-ice and snowfall Polar lows Impact on the oceanic ecosystem e.g. blue whiting catches and sub-polar gyre Impact on urban societies Urban heat islands Data management and outreach

The research leading to these results has received funding from the European Union 7th Framework Programme (FP7 2007-2013), under grant agreement n.308299 NACLIM www.naclim.eu