North Atlantic Observing System Gerard McCarthy NERC/NOC
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Transcript of North Atlantic Observing System Gerard McCarthy NERC/NOC
North Atlantic Observing SystemGerard McCarthy
NERC/NOC
North Atlantic ClimateEuropean 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 universities12 research institutions2 national operational institutes § 5 Core themes, 12 work packages § Project costs: 11 M€§ EU contribution: 8.6 Mio M€
NACLIM: An Overview
Moored Observations in NACLIM
• Greenland-Scotland Ridge
• OSNAP family
• Rekyannes ridge
• 54ºN array
• RAPID at 26ºN
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–ShetlandChannel. Oc. Sci.
7.1 Sv+- 1 Sv
GSR totals
Shetland branch
Faroe branch
Iceland branch
• Total inflow across GSR is 7 Sv
• Overflows (FBC+DS) is 6 Sv
• No trend in transport
• Noticeable increase in
temperature
NACLIM and OSNAP
The 53ºN array
RekjyannesRidge
The 53ºN Array
Located at exit of Labrador SeaJoint Canadian (C1-C3,K7), US (K7) and GermanNACLIM PI: Johannes Karstensen (GEOMAR)
Rejkyannes Ridge
4 moorings on west flank of the RRWill be deployed this year (1 year delayed) for 3 times 1 year measuring velocities, T and CNACLIM PI Laura de Steur (NIOZ)
NACLIM and OSNAP
The 53ºN array
RekjyannesRidge
• 53ºN Array (J. Karstensen-GEOMAR)
• Rekjyannes Ridge (L. De Steur-NIOZ)
• Extras: Labrador sea mooring; SAMS activities
• 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
NACLIM Extras
The research leading to these results has received funding from the European
Union 7th Framework Programme (FP7 2007-2013), under grant agreement
n.308299NACLIM www.naclim.eu