1NIOZ is part of the Netherlands Organisation for Scientific Research (NWO)

Koninklijk Nederlands Instituut voor ZeeonderzoekRoyal Netherlands Institute for Sea Research

The NIOZ contribution to THOR

Hendrik M. van Aken

Thorshavn, 25-26 June 2009

2

45 40 35 30 25 20 15 10 5

Longitude (W )

50

52

54

56

58

60

62

64L

atit

ud

e (N

) AR7E / A1E section (the straight variety)

Tyro, 1991

Darw in, 1991

Pelagia, 2000

Pelagia 2003

Near-annual hydrographic surveys since 1990.

Data until 2005 available at WOCE (&CLIVAR) data base

3

AR7E data

CTD T, S and O2 high-resolution profiles

water sample data O2, nutrients, CO2, CFCs

(2007)

4

Previous ASOF work

5

-45 -40 -35 -30 -25 -20 -15 -10 -5Long itude

3

4

5

6

7

8

9

10

11

Th

eta

TR 1991

C D 1991

PE 2000

PE 2003

W O C E section AR 7Epotentia l tem perature at 500 dbar

-45 -40 -35 -30 -25 -20 -15 -10 -5Long itude

34.8

34.9

35

35.1

35.2

35.3

35.4

35.5

Sa

linity

W O C E section AR 7Esalin ity a t 500 dbar

Changes of the hydrographic properties of the Central Water

Continued warming and salinification!

6

44 43 42 41 40 39 38 37 36 35 34

Longitude (W )

58

59

60

61

Latit

ude

(N)

LOCO2-1

LOCO2-2LOCO3

AR7E

1/1 /04 1/1 /05 1/1 /06 1/1 /07D ate

-20

-10

0

10

20

30

Nor

th c

om

pone

nt (

cm/s

)

210 m

2890 m

7/1/03 1/1/04 7/1/04 1/1/05 7/1/05 1/1/06 7/1/06 1/1/07

1

1.2

1.4

1.6

1.8

Tem

pera

ture

34.84

34.86

34.88

34.9

Salinity

Moorings in the Irminger Sea

7

What to do with data?

Existing data of AR7E surveys to IfMH. (NIOZ data only? Or also ifMH and SOC data?)

Existing mooring data to THOR data base

repeat AR7E survey in 2009 and 2011

recover and re-deploy profiling mooring in 2009, 2010 and 2011

new AR7E data to THOR data base

new mooring data to THOR data base

writing scientific papers!!