flow of atlantic water to the north icelandic shelf steingrímur jónsson 1,2 and héðinn...
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![Page 1: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/1.jpg)
Flow of Atlantic water to the North Icelandic shelf
Steingrímur Jónsson1,2
and Héðinn Valdimarsson1 1Marine Research Institute and
2University of Akureyri
![Page 2: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/2.jpg)
28oW 26oW 24oW 22oW 20oW 18oW
16oW 65oN
30'
66oN
30'
67oN
30'
68oN
DENMARK STRAIT
ICELAND
28oW 26oW 24oW 22oW 20oW 18oW
16oW 65oN
30'
66oN
30'
67oN
30'
68oN
Kögur
Hornbanki
Si 3
10 cm/s
LB6
KG6
Map of the area. The red dots denote current meter positions and the blue denote CTD stations. Depth contours are 100, 200, 500 and 1000 meters.
![Page 3: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/3.jpg)
Salinity on the Hornbanki section. Also shown is the position of the current meters as yellow dots.
![Page 4: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/4.jpg)
Timeline for the measurements
![Page 5: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/5.jpg)
HornbankiHornbanki
![Page 6: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/6.jpg)
HB1
HB2 HB3
E-W component at the Hornbanki sectionmeasured with a vessel mounted ADCPMean from 2001-2005
![Page 7: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/7.jpg)
![Page 8: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/8.jpg)
Salinity on the Hornbanki section. Also shown is the position of the current meters as yellow dots.
![Page 9: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/9.jpg)
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
2
3
4
5
6
7
Tem
per
atu
re °
C
H1 80mH2 81mH2 151mH3 84mH3 154mVelocityH3 84m
- 2 0
0
2 0
4 0
Vel
oci
ty (
cm/s
)
Time series of temperature from the current meters. Also shown is the average of the E-W component of the velocity at mooring H3 at 84m depth (black line). Each tick on the x-axis denotes the beginning of the corresponding month. The yellow lines indicate the times when CTD sections were taken. Data are weekly running averages.
![Page 10: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/10.jpg)
12345678910111213141516171819202122
-220 -200 -180 -160 -140 -120 -100 -80 -60 -40 -20 0
D istance (nm )
-700
-600
-500
-400
-300
-200
-100
0D
epth
(db
)
- 2
- 1
0
1
2
3
4
5
6
7
8
9
1 0
Potential temperature across the Denmark Strait at the sill, Sep. 1997.
![Page 11: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/11.jpg)
DW
AIW
PWAW
![Page 12: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/12.jpg)
LB6 80m
KG6 80m
HB2 80m
![Page 13: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/13.jpg)
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94 95 96 97 98 99 00 01Year
0
10
20
30
40
He
at
tra
ns
po
rt (
TW
)
0
0.5
1
1.5
Tra
ns
po
rt (
Sv
)
Transport (T)Heat transport (Q)
<T> = 0.75 Sv<Q> = 18.9 TWTransport 1999-2000
![Page 16: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/16.jpg)
Temperature averaged from 50-100 m on the Siglunes section
![Page 17: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/17.jpg)
0.83 Sv23 TW
3.8 Sv134 TW 3.8 Sv
156 TW
Österhus et al. (2005)
0.83 Sv = 10% of the total transport to the Nordic Seas
23 TW = 7% of the total heat transport to the Nordic Seas
![Page 18: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/18.jpg)
Transport associated with AW
Period
Transport of AW(Sv)
Proportion of AW (%)
Heat transport
(TW)
1994-2008 0.83 67 23
1994-1995 0.50 47 12
2003 1.12 76 33
![Page 19: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/19.jpg)
Seasonal variations in transport
Amplitude of 0.27 Sv Minimum in February/March Maximum in late spring and summer
![Page 20: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/20.jpg)
28oW 26oW 24oW 22oW 20oW 18oW
16oW 65oN
30'
66oN
30'
67oN
30'
68oN
DENMARK STRAIT
ICELAND
28oW 26oW 24oW 22oW 20oW 18oW
16oW 65oN
30'
66oN
30'
67oN
30'
68oN
Kögur
Hornbanki
Si 3
10 cm/s
LB6
KG6
Map of the area. The red dots denote current meter positions and the blue denote CTD stations. Depth contours are 100, 200, 500 and 1000 meters.
![Page 21: Flow of Atlantic water to the North Icelandic shelf Steingrímur Jónsson 1,2 and Héðinn Valdimarsson 1 1 Marine Research Institute and 2 University of Akureyri](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfc71a28abf838ca79d2/html5/thumbnails/21.jpg)
j f m a m j j a s o n dMonth
0
0.4
0.8
1.2
Tra
ns
po
rt (
Sv
)
1994 1995 1996 1997 1998 1999 2000 2001 2002Year
-16
-12
-8
-4
0
4
8
N_S
win
d (
m/s
)
0
0.5
1
1.5
Tra
ns
po
rt (
Sv
)
TransportN-S wind
Jan-95
-180
-90
0
90
180
Deg
rees
Dec-94 Feb-95 Mar-95
-8 -4 0 4 8m/s
0
0.4
0.8
1.2
1.6
Sv
r = 0.52
Y = 0.056 * X + 0.81