Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea
Internal waves in the ocean play an important role in turbulence generation due to wave-breaking processes and mixing of the ocean. Airborne radar images of internal waves and ocean eddies north of Svalbard suggested that ocean eddies could generate internal waves. Here, we test this hypothesis usin...
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ftmichigantuniv:oai:digitalcommons.mtu.edu:michigantech-p-1995 2023-05-15T16:27:21+02:00 Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea Johannessen, O. M. Sandven, S. Chunchuzov, I. P. Shuchman, R. A. 2019-08-21T07:00:00Z application/pdf https://digitalcommons.mtu.edu/michigantech-p/999 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1995&context=michigantech-p unknown Digital Commons @ Michigan Tech https://digitalcommons.mtu.edu/michigantech-p/999 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1995&context=michigantech-p Michigan Tech Publications internal waves ocean eddies Greenland Sea Michigan Tech Research Institute Oceanography and Atmospheric Sciences and Meteorology text 2019 ftmichigantuniv 2022-01-23T10:54:23Z Internal waves in the ocean play an important role in turbulence generation due to wave-breaking processes and mixing of the ocean. Airborne radar images of internal waves and ocean eddies north of Svalbard suggested that ocean eddies could generate internal waves. Here, we test this hypothesis using data from a dedicated internal wave experiment in the Greenland Sea. Internal waves with dominant frequencies of 1–3 cycles per hour and amplitudes up to 15 m were observed using three thermistor chains suspended from a drifting array conveniently placed on the ice in a triangle with sides of several km. Analysis shows that internal waves propagated westwards with a speed of about 0.2 m/s and wavelength of 0.4–1.0 km, away from an anticyclonic ocean eddy located just east of the array. This was consistent with the remote-sensing observations of internal waves whose surface signature was imaged by an airborne radar in the western part of this eddy, and with theories that eddies and vortexes can directly generate internal waves. This case study supports our hypothesis that ocean eddies can be the direct sources of internal waves reported here for the first time and not only enhancing the local internal wave field by draining energy from the eddies, as studied previously. The present challenge is to explore the role of eddies as a new source in generating internal waves in the global ocean. Text Greenland Greenland Sea Svalbard Michigan Technological University: Digital Commons @ Michigan Tech Greenland Svalbard |
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Open Polar |
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Michigan Technological University: Digital Commons @ Michigan Tech |
op_collection_id |
ftmichigantuniv |
language |
unknown |
topic |
internal waves ocean eddies Greenland Sea Michigan Tech Research Institute Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
internal waves ocean eddies Greenland Sea Michigan Tech Research Institute Oceanography and Atmospheric Sciences and Meteorology Johannessen, O. M. Sandven, S. Chunchuzov, I. P. Shuchman, R. A. Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea |
topic_facet |
internal waves ocean eddies Greenland Sea Michigan Tech Research Institute Oceanography and Atmospheric Sciences and Meteorology |
description |
Internal waves in the ocean play an important role in turbulence generation due to wave-breaking processes and mixing of the ocean. Airborne radar images of internal waves and ocean eddies north of Svalbard suggested that ocean eddies could generate internal waves. Here, we test this hypothesis using data from a dedicated internal wave experiment in the Greenland Sea. Internal waves with dominant frequencies of 1–3 cycles per hour and amplitudes up to 15 m were observed using three thermistor chains suspended from a drifting array conveniently placed on the ice in a triangle with sides of several km. Analysis shows that internal waves propagated westwards with a speed of about 0.2 m/s and wavelength of 0.4–1.0 km, away from an anticyclonic ocean eddy located just east of the array. This was consistent with the remote-sensing observations of internal waves whose surface signature was imaged by an airborne radar in the western part of this eddy, and with theories that eddies and vortexes can directly generate internal waves. This case study supports our hypothesis that ocean eddies can be the direct sources of internal waves reported here for the first time and not only enhancing the local internal wave field by draining energy from the eddies, as studied previously. The present challenge is to explore the role of eddies as a new source in generating internal waves in the global ocean. |
format |
Text |
author |
Johannessen, O. M. Sandven, S. Chunchuzov, I. P. Shuchman, R. A. |
author_facet |
Johannessen, O. M. Sandven, S. Chunchuzov, I. P. Shuchman, R. A. |
author_sort |
Johannessen, O. M. |
title |
Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea |
title_short |
Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea |
title_full |
Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea |
title_fullStr |
Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea |
title_full_unstemmed |
Observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the Greenland Sea |
title_sort |
observations of internal waves generated by an anticyclonic eddy: a case study in the ice edge region of the greenland sea |
publisher |
Digital Commons @ Michigan Tech |
publishDate |
2019 |
url |
https://digitalcommons.mtu.edu/michigantech-p/999 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1995&context=michigantech-p |
geographic |
Greenland Svalbard |
geographic_facet |
Greenland Svalbard |
genre |
Greenland Greenland Sea Svalbard |
genre_facet |
Greenland Greenland Sea Svalbard |
op_source |
Michigan Tech Publications |
op_relation |
https://digitalcommons.mtu.edu/michigantech-p/999 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1995&context=michigantech-p |
_version_ |
1766016503487922176 |