Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea
Hydrographic and current measurements are analysed for stagnantdeep-water conditions over the south-eastern topographic flankof the Eastern Gotland Basin (EGB) in April 2000.Results suggest a prevailing barotropic motion mode on a synopticscale of several days. Deep along-slope volume transports de...
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Institute of Oceanology of the Polish Academy of Sciences
2007-06-01
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| Series: | Oceanologia |
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| Online Access: | http://www.iopan.gda.pl/oceanologia/49_2.html#A2 |
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| author | Eberhard Hagen Rainer Feistel |
| author_facet | Eberhard Hagen Rainer Feistel |
| author_sort | Eberhard Hagen |
| collection | DOAJ |
| description | Hydrographic and current measurements are analysed for stagnantdeep-water conditions over the south-eastern topographic flankof the Eastern Gotland Basin (EGB) in April 2000.Results suggest a prevailing barotropic motion mode on a synopticscale of several days. Deep along-slope volume transports derivedfrom subsurface current meter moorings are compared with thoseof the baroclinic fraction of geostrophic motions crossing theplane of a hydrographic section. This was aligned perpendicularto deep isobaths and was repeated 40 times with a time step ofsix hours. Changes in regional winds produced a quasi-ten daycycle in the filling level of the Baltic Proper. Associated wave-likefluctuations of the mass field propagated cyclonically with avelocity of about 0.04 m s<sup>-1</sup> around the deep basin's rim. Itis concluded that associated changes in deep volume transportsresult mainly from barotropically governed advection processesand that those of the baroclinic component of geostrophic currentsprovide a qualitatively and quantitatively quite inaccurate descriptionof related transport fluctuations on a daily scale. |
| format | Article |
| id | doaj-art-eeb8b7a0c2044e9fb4a26097de99568d |
| institution | Kabale University |
| issn | 0078-3234 |
| language | English |
| publishDate | 2007-06-01 |
| publisher | Institute of Oceanology of the Polish Academy of Sciences |
| record_format | Article |
| series | Oceanologia |
| spelling | doaj-art-eeb8b7a0c2044e9fb4a26097de99568d2025-08-20T03:49:12ZengInstitute of Oceanology of the Polish Academy of SciencesOceanologia0078-32342007-06-01492185208Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic SeaEberhard HagenRainer FeistelHydrographic and current measurements are analysed for stagnantdeep-water conditions over the south-eastern topographic flankof the Eastern Gotland Basin (EGB) in April 2000.Results suggest a prevailing barotropic motion mode on a synopticscale of several days. Deep along-slope volume transports derivedfrom subsurface current meter moorings are compared with thoseof the baroclinic fraction of geostrophic motions crossing theplane of a hydrographic section. This was aligned perpendicularto deep isobaths and was repeated 40 times with a time step ofsix hours. Changes in regional winds produced a quasi-ten daycycle in the filling level of the Baltic Proper. Associated wave-likefluctuations of the mass field propagated cyclonically with avelocity of about 0.04 m s<sup>-1</sup> around the deep basin's rim. Itis concluded that associated changes in deep volume transportsresult mainly from barotropically governed advection processesand that those of the baroclinic component of geostrophic currentsprovide a qualitatively and quantitatively quite inaccurate descriptionof related transport fluctuations on a daily scale.www.iopan.gda.pl/oceanologia/49_2.html#A2Baltic SeaEastern Gotland BasinHydrographyCurrent measurementsDeep water circulation |
| spellingShingle | Eberhard Hagen Rainer Feistel Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea Oceanologia Baltic Sea Eastern Gotland Basin Hydrography Current measurements Deep water circulation |
| title | Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea |
| title_full | Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea |
| title_fullStr | Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea |
| title_full_unstemmed | Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea |
| title_short | Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea |
| title_sort | synoptic changes in the deep rim current during stagnant hydrographic conditions in the eastern gotland basin baltic sea |
| topic | Baltic Sea Eastern Gotland Basin Hydrography Current measurements Deep water circulation |
| url | http://www.iopan.gda.pl/oceanologia/49_2.html#A2 |
| work_keys_str_mv | AT eberhardhagen synopticchangesinthedeeprimcurrentduringstagnanthydrographicconditionsintheeasterngotlandbasinbalticsea AT rainerfeistel synopticchangesinthedeeprimcurrentduringstagnanthydrographicconditionsintheeasterngotlandbasinbalticsea |