Rockall Trough Hydrographic Time Series The Extended Ellett Line Changes in the Upper Ocean
Mean properties of the upper 800 m of the water column over 37 ( upper right) years show variability but generally increased from a low in the mid 1970’s, the time of the great salinity anomaly (Dickson et al, 1988), to the mid 2000’s. The last decade of this period saw a change in the circulation o...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.685.7840 http://conference2011.wcrp-climate.org/posters/C5/C5_Allen_M181B_1.pdf |
| Summary: | Mean properties of the upper 800 m of the water column over 37 ( upper right) years show variability but generally increased from a low in the mid 1970’s, the time of the great salinity anomaly (Dickson et al, 1988), to the mid 2000’s. The last decade of this period saw a change in the circulation of the gyre (Hakkinen & Rhines, 2005; Hatun et al, 2005), which allowed more warm, saline water from the south to enter the Rockall Trough. The spread of warm water northward through the Nordic Seas to the Arctic was documented by Holliday et al, 2008. Since 2006 there has been a small but steady decrease in temperature., about 0.5°C, suggesting that the long-term increase in temperature has reversed over the last 5 years. Salinity since 2004 is unchanged. It is possible that the changes result from aliasing of the seasonal signal. |
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