Transport Mooring Arrays in NACLIM Karin Margretha H

Transport Mooring Arrays in NACLIM Karin Margretha H. Larsen NACLIM CT 2 co-lead (Monitoring of North Atlantic Parameters)

NACLIM CT 2 Data Collection GSR-TMAs DS LOCO/CIS RACE/ NACLIM EEL OSNAP RAPID

TMAs on the Greenland-Scotland Ridge On Ocean. SITES

Recirculation makes the Faroe-Shetland Channel difficult l e n nd Faroe Bank Channel la t e h S e- ro a F Observational section C n a h

Faroe-Shetland Channel NACLIM 2015 -2016 8 ADCPs NACLIM 2014 -2015 7 ADCPs 100 CTD sections 4 – 9 ADCPs Altimetry: 1992 - 2011 Berx et al. , 2013: CTD + ADCP + Altimetry => Volume transport 1993 – 2011 Temperature

Faroe Shetland Channel – AW inflow No long-term trend (Berx et al, 2013)

Faroe Current monitoring section Satellite altimetry Atlantic Bottom temperature Arctic Hansen et al. , 2015: ADCPs: 1997 -2015 CTD + ADCP + Altimetry => Volume transport 1993 – 2014

Faroe Current – AW inflow 1993 - 2014 Annual mean 3 -year mean ± standard error 20 year trend: 9± 8% (95% confidence), Hansen et al, 2015

Iceland Branch 1 -4 current meter moorings

Iceland Branch – AW inflow Small increasing trend (Jónsson and Valdimarsson, 2012)

Denmark Strait Overflow Velocity from shipboard ADCP

Denmark Strait Overflow No long-term trends (Jochumsen et al. , 2012, 2015)

Faroe Bank Channel Overflow Speed (cm/s)

Faroe Bank Channel Overflow No long-term trends (Hansen and Østerhus, 2007)

Wyville Thomson Ridge Overflow No trend, but oveflow events (Sherwin et al, 2008; Johnson et al, 2010)

Future monitoring

Future monitoring German moorings Icelandic moorings in 2016 WOW project 1 yr Danish funding Iceland No moorings in 2016 Faroese moorings Faroes No Faroese moorings Scottish moorings OSNAP

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