Skip to content

Research at St Andrews

Seasonal evolution of the upper-ocean adjacent to the South Orkney Islands, Southern Ocean: Results from a "lazy biological mooring"

Research output: Contribution to journalArticle

Author(s)

Michael P. Meredith, Keith W. Nicholls, Ian A. Renfrew, Lars Boehme, Martin Biuw, Mike Fedak

School/Research organisations

Abstract

A serendipitous > 8-month time series of hydrographic properties was obtained from the vicinity of the South Orkney Islands, Southern Ocean, by tagging a southern elephant seal (Mirounga leonine) on Signy Island with a Conductivity-Temperature-Depth/Satellite-Relay Data Logger (CTD-SRDL) in March 2007. Such a time series (including data from the austral autumn and winter) would have been extremely difficult to obtain via other means, and it illustrates with unprecedented temporal resolution the seasonal progression of upper-ocean water mass properties and stratification at this location. Sea ice production values of around 0.15-0.4 m month(-1) for April to July were inferred from the progression of salinity, with significant levels still in September (around 0.2 m month(-1)). However, these values presume that advective processes have negligible effect on the salinity changes observed locally; this presumption is seen to be inappropriate in this case, and it is argued that the ice production rates inferred are better considered as "smeared averages" for the region of the northwestern Weddell Sea upstream from the South Orkneys. The impact of such advective effects is illustrated by contrasting the observed hydrographic series with the output of a one-dimensional model of the upper-ocean forced with local fluxes. It is found that the difference in magnitude between local (modelled) and regional (inferred) ice production is significant, with estimates differing by around a factor of two. A halo of markedly low sea ice concentration around the South Orkneys during the austral winter offers at least a partial explanation for this, since it enabled stronger atmosphere/ocean fluxes to persist and hence stronger ice production to prevail locally compared with the upstream region. The year of data collection was an El Nino year, and it is well-established that this phenomenon can impact strongly on the surface ocean and ice field in this sector of the Southern Ocean, thus the possibility of our time series being atypical cannot be ruled out. Longer-term collection of in situ ocean data from this locality would be desirable, to address issues relating to interannual variability and long-term change. (C) 2011 Elsevier Ltd. All rights reserved.

Close

Details

Original languageEnglish
Pages (from-to)1569-1579
Number of pages11
JournalDeep Sea Research Part II: Topical Studies in Oceanography
Volume58
Issue number13-16
Early online date11 Jan 2011
DOIs
Publication statusPublished - Jul 2011

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Animal-borne telemetry: an integral component of the ocean observing toolkit

    Harcourt, R., Martins Sequeira, A. M., Zhang, X., Rouquet, F., Komatsu, K., Heupel, M., McMahon, C. R., Whoriskey, F. G., Meekan, M., Carroll, G., Brodie, S., Simpfendorfer, C., Hindell, M. A., Jonsen, I. D., Costa, D. P., Block, B. A., Muelbert, M. M., Woodward, B. E., Weises, M. J., Aarestrup, K. & 41 others, Biuw, M., Boehme, L., Bograd, S. J., Cazau, D., Charrassin, J-B., Cooke, S., Cowley, P. D., Nico De Bruyn, P. J., Du Dot, T. J., Duarte, C. M., EguÍluz, V. M., Ferreira, L., Fernández-Garcia, J., Goetz, K., Goto, Y., Guinet, C., Hammill, M., Hays, G. C., Hazen, E., Huckstadt, L., Huveneers, C., Iverson, S., Jaaman, S. A., Kittiwattanawong, K., Kovacs, K., Lydersen, C., Moltmann, T., Naruoka, M., Phillips, L., Picard, B., Queiroz, N., Reverdin, G., Sato, K., Sims, D. W., Thorstad, E. B., Thums, M., Treasure, A. M., Trites, A., Williams, G. D., Yonehara, Y. & Fedak, M. A., 26 Jun 2019, In : Frontiers in Marine Science. 6, 21 p., 326.

    Research output: Contribution to journalReview article

  2. Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal-borne tags

    Mallett, H. K. W., Boehme, L., Fedak, M., Heywood, K. J., Stevens, D. P. & Roquet, F., 24 May 2018, In : Geophysical Research Letters. Early View, 9 p.

    Research output: Contribution to journalArticle

  3. In-situ observations using tagged animals

    Roquet, F., Boehme, L., Bester, M., Bornemann, H., Brasseur, S., Charrassin, J-B., Costa, D., Fedak, M. A., Guinet, C., Hall, A. J., Harcourt, R., Hindell, M., Kovacs, K. M., Lea, M-A., Lovell, P., Lowther, A., Lydersen, C., McMahon, C., Picard, B., Reverdin, G. & 1 others, Vincent, C., 21 Feb 2017. 5 p.

    Research output: Contribution to conferencePaper

Related by journal

  1. Deep Sea Research Part II: Topical Studies in Oceanography (Journal)

    Patrick Miller (Editor)
    2007 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

Related by journal

  1. Beluga whales in the western Beaufort Sea: current state of knowledge on timing, distribution, habitat use and environmental drivers

    Stafford, K. M., Ferguson, M. C., Hauser, D. D. W., Okkonen, S. R., Berchok, C. L., Citta, J. J., Clarke, J. T., Garland, E. C., Jones, J. & Suydam, R. S., Jun 2018, In : Deep Sea Research Part II: Topical Studies in Oceanography. 152, p. 182-194

    Research output: Contribution to journalArticle

  2. Distribution, abundance and habitat use of deep diving cetaceans in the North-East Atlantic

    Rogan, E., Cañadas, A., Macleod, K., Santos, M. B., Mikkelsen, B., Uriarte, A., Van Canneyt, O., Antonio Vázquez, J. & Hammond, P. S., Jul 2017, In : Deep Sea Research Part II: Topical Studies in Oceanography. 141, p. 8-19

    Research output: Contribution to journalArticle

  3. Estimating cetacean density and abundance in the Central and Western Mediterranean Sea through aerial surveys: implications for management

    Panigada, S., Lauriano, G., Donovan, G., Pierantonio, N., Cañadas, A., Vázquez, J. A. & Burt, L., Jul 2017, In : Deep Sea Research Part II: Topical Studies in Oceanography. 141, p. 41-58 18 p.

    Research output: Contribution to journalArticle

  4. Grey and harbour seals in France: distribution at sea, connectivity and trends in abundance at haulout sites

    Vincent, C., Huon, M., Caurant, F., Dabin, W., Deniau, A., Dixneuf, S., Dupuis, L., Elder, J-F., Fremau, M-H., Hassani, S., Hemon, A., Karpouzopoulos, J., Lefeuvre, C., McConnell, B. J., Moss, S. E. W., Provost, P., Spitz, J., Turpin, Y. & Ridoux, V., Jul 2017, In : Deep Sea Research Part II: Topical Studies in Oceanography. 141, p. 294-305

    Research output: Contribution to journalArticle

  5. Harbour porpoise distribution can vary at small spatiotemporal scales in energetic habitats

    Benjamins, S., van Geel, N., Hastie, G., Elliott, J. & Wilson, B., Jul 2017, In : Deep Sea Research Part II: Topical Studies in Oceanography. 141, p. 191-202 12 p.

    Research output: Contribution to journalArticle

ID: 23893727

Top