Hydrography and circulation west of Sardinia in June 2014
| Autor: | M. Knoll, I. Borrione, H.-V. Fiekas, A. Funk, M. P. Hemming, J. Kaiser, R. Onken, B. Queste, A. Russo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:GE1-350
Water mass 010504 meteorology & atmospheric sciences 010505 oceanography Range (biology) Sea trial lcsh:Geography. Anthropology. Recreation 01 natural sciences Salinity Current (stream) Oceanography lcsh:G Potential density Potential temperature Hydrography Geology lcsh:Environmental sciences 0105 earth and related environmental sciences |
| Zdroj: | Ocean Science, Vol 13, Pp 889-904 (2017) Knoll, M.; Borrione, I.; Fiekas, H.-V.; Funk, A.; Hemming, M.P.; Kaiser, J.; Onken, R.; Queste, B.; Russo, A.: Hydrography and Circulation West of Sardinia in June 2014. In: Ocean Science. Vol. 13 (2017) 6, 889-904. (DOI: /10.5194/os-13-889-2017) |
| ISSN: | 1812-0792 1812-0784 |
| DOI: | 10.5194/os-13-889-2017) |
| Popis: | In the frame of the REP14-MED sea trial in June 2014, the hydrography and circulation west of Sardinia, observed by means of gliders, shipborne CTD (conductivity, temperature, depth) instruments, towed devices, and vessel-mounted ADCPs (acoustic doppler current profilers), are presented and compared with previous knowledge. So far, the circulation is not well-known in this area, and the hydrography is subject to long-term changes. Potential temperature, salinity, and potential density ranges as well as core values of the observed water masses were determined. Modified Atlantic Water (MAW), with potential density anomalies below 28.72 kg m−3, showed a salinity minimum of 37.93 at 50 dbar. Levantine Intermediate Water (LIW), with a salinity maximum of about 38.70 at 400 dbar, was observed within a range of 28.72<σΘ/(kg m−3) −1. Geostrophic currents and water mass transports calculated across zonal and meridional transects showed a good agreement with vessel-mounted ADCP measurements. Within the MAW, northward currents were observed over the shelf and offshore, while a southward transport of about 1.5 Sv occurred over the slope. A net northward transport of 0.38 Sv across the southern transect decreased to zero in the north. Within the LIW, northward transports of 0.6 Sv across the southern transects were mainly observed offshore, and decreased to 0.3 Sv in the north where they were primarily located over the slope. This presentation of the REP14-MED observations helps to further understand the long-term evolution of hydrography and circulation in the Western Mediterranean, where considerable changes occurred after the Eastern Mediterranean Transient and the Western Mediterranean Transition. |
| Databáze: | OpenAIRE |
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