Skip to main content Accessibility help
×
Home

Iceberg signatures and detection in SAR images in two test regions of the Weddell Sea, Antarctica

  • Christine Wesche (a1) and Wolfgang Dierking (a1)

Abstract

A pixel-based methodology has been established for automatic identification of icebergs in satellite synthetic aperture radar (SAR) images acquired during different seasons and for different sea- ice conditions. This includes, in particular, smaller icebergs (longitudinal axis 100 m to 18.5 km). Investigations were carried out for two test regions located in the Weddell Sea, Antarctica, using images of the Envisat Advanced SAR (ASAR) at HH polarization and of the European Remote-sensing Satellite-2 (ERS-2) SAR (VV-polarized). From the former, a sequence of Image Mode and Wide Swath Mode data are available for the whole of 2006. The ERS data were acquired around the tip of the Antarctic Peninsula in spring and summer months of the years 2000-03. The minimum size of icebergs that could be identified in the IM images was <0.02 km2. Radar backscattering coefficients of icebergs, sea ice and open water were determined separately. We demonstrate that the error in separating icebergs from their surroundings (sea ice or open water) depends on meteorological, oceanographic and sea-ice conditions. Also the pre-processing of the SAR images (e.g. speckle reduction) influences iceberg recognition. Differences in detection accuracy as a function of season could not be substantiated for our test sites, but have in general to be taken into account, as results of other investigations indicate.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Iceberg signatures and detection in SAR images in two test regions of the Weddell Sea, Antarctica
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Iceberg signatures and detection in SAR images in two test regions of the Weddell Sea, Antarctica
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Iceberg signatures and detection in SAR images in two test regions of the Weddell Sea, Antarctica
      Available formats
      ×

Copyright

References

Hide All
Drinkwater, MR, Hosseinmostafa, R and Gogineni, P (1995) C-band backscatter measurements of winter sea-ice in the Weddell Sea, Antarctica. Int. J. Remote Sens., 16(17), 3365-3389
Fung, AK (1994) Microwave scattering and emission models and their applications. Artech House, Norwood, MA
Gray, AL and Arsenault, LD (1991) Time-delayed reflections in L-band synthetic aperture radar imagery of icebergs. IEEE Trans. Geosci. Remote Sens., 29(2), 284-291
Gutt, J and Starmans, A (2001) Quantification of iceberg impact and benthic recolonisation patterns in the Weddell Sea (Antarctica). Polar Biol, 24(8), 615-619
Haas, C (2001) The seasonal cycle of ERS scatterometer signatures over perennial Antarctic sea ice and associated surface ice properties and processes. Ann. Glaciol., 33, 69-73 (doi: 10.3189/172756401781818301)
Haralick, RM, Sternberg, SR and Zhuang, X (1987) Image analysis using mathematical morphology. IEEE Trans. Patt. Anal. Mach. Intell., 9(4), 532-550 (doi: 10.1109/TPAMI.1987.4767941)
Jackson, CR and Apel, JR (2005) Synthetic aperture radar marine user’s manual. National Oceanic and Atmospheric Administration US Department of Commerce, Washington, DC
Jacobs, SS, Hellmer, HH, Doake, CSM, Jenkins, A and Frolich, RM (1992) Melting of ice shelves and the mass balance of Antarctica. J. Glaciol., 38(130), 375-387
Jenkins, A (1999) The impact of melting ice on ocean waters. J. Phys. Oceanogr, 29(9), 2370-2381
Lopes, A, Touzi, R and Nezry, E (1990) Adaptive speckle filters and scene heterogeneity. IEEE Trans. Geosci. Remote Sens., 28(6), 992-1000 (doi: 10.1109/36.62623)
Oliver, C and Quegan, S (1998) Understanding synthetic aperture radar images. Artech House, Boston, MA
Paterson, WSB (1994) The physics of glaciers, 3rd edn. Elsevier, Oxford
Power, D, Youden, J, Lane, K, Randell, C and Flett, D (2001) Iceberg detection capabilities of RADARSAT synthetic aperture radar. Can. J. Remote Sens., 27(5), 476-486
Redding, NJ (1999) Estimating the parameters of the K distribution in the intensity domain. Defence Science and Technology Organisation, Surveillance Systems Division, Salisbury (Tech. Rep. DSTO-TR-0839).
Sandven, S, Babiker, M and Kloster, K (2007) Iceberg observations in the Barents Sea by radar and optical satellite images. In Proceedings of the ENVISAT Symposium, 23-27 April 2007, Montreux, Switzerland. European Space Agency, Noordwijk (ESA SP-636)
Schodlok, MP, Hellmer, HH, Rohardt, G and Fahrbach, E (2006) Weddell Sea iceberg drift: five years of observations. J. Geophys. Res., 111 (C6), C06018 (doi: 10.1029/2004JC002661)
Silva, TAM and Bigg, GR (2005) Computer-based identification and tracking of Antarctic icebergs in SAR images. Remote Sens. Environ., 94(3), 287-297 (doi: 10.1016/j.rse.2004.10.002)
Silva, TAM, Bigg, GR and Nicholls, KW (2006) Contribution of giant icebergs to the Southern Ocean freshwater flux. J. Geophys. Res., 111 (C3), C03004 (doi: 10.1029/2004JC002843)
Williams, RN, Rees, WG and Young, NW (1999) A technique for the identification and analysis of icebergs in synthetic aperture radar images of Antarctica. Int. J. Remote Sens., 20(15-16), 3183-3199 (doi: 10.1080/014311699211697)
Willis, CJ, Macklin, JT, Partington, KC, Teleki, PG, Rees, WG and Williams, RG (1996) Iceberg detection using ERS-1 synthetic aperture radar. Int. J. Remote Sens., 17(9), 1777-1795
Young, NW, Turner, D, Hyland, G and Williams, RN (1998) Nearcoastal iceberg distributions in East Antarctica, 50-145° E. Ann. Glaciol., 27, 68-74

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed