Sharing the seas: A review and analysis of ocean sector interactions

The ‘Final Act of the Conference on the Conservation of Antarctic Marine Living Resources’ included a statement made on 19 May 1980 by its Chairman. The ‘Chairman’s Statement’ addressed the CAMLR Convention’s application in waters adjacent to the Kerguelen and Crozet Islands over which France exercises jurisdiction by virtue of its sovereignty over the islands. The Statement included explicit reference to waters adjacent to other islands within the CCAMLR Area, where the existence of State sovereignty is recognised by all the Convention Contracting Parties. In 2007 the CCAMLR Performance Review noted the increasing frequency with which some Commission Members were invoking the Chairman’s Statement. In particular, the Review Panel expressed the view that a point has been reached where any Conservation Measure adopted by CCAMLR invariably attracts a formal reservation on the perception that a conservation measure affects the maritime jurisdictions of certain Members, particularly those exercising national sovereignty over sub-Antarctic islands in the CCAMLR Indian Ocean sector. This paper examines the background to, and practices associated with, applying CCAMLR Conservation Measure reservations under the Chairman’s Statement.

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Reconstruction of millennial changes in dust emission, transport and regional sea ice coverage using the deep EPICA ice cores from the Atlantic and Indian Ocean sector of Antarctica

Earth and Planetary Science Letters ◽

10.1016/j.epsl.2007.06.014 ◽

2007 ◽

Vol 260 (1-2) ◽

pp. 340-354 ◽

Cited By ~ 138

Author(s):

Hubertus Fischer ◽

Felix Fundel ◽

Urs Ruth ◽

Birthe Twarloh ◽

Anna Wegner ◽

...

Keyword(s):

Indian Ocean ◽

Sea Ice ◽

Dust Emission ◽

Ice Cores ◽

Ice Coverage ◽

Indian Ocean Sector ◽

Ocean Sector

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Comparison of zooplankton distribution patterns between four seasons in the Indian Ocean sector of the Southern Ocean

Polar Science ◽

10.1016/j.polar.2010.05.002 ◽

2010 ◽

Vol 4 (2) ◽

pp. 317-331 ◽

Cited By ~ 17

Author(s):

Kunio T. Takahashi ◽

Graham W. Hosie ◽

John A. Kitchener ◽

David J. McLeod ◽

Tsuneo Odate ◽

...

Keyword(s):

Indian Ocean ◽

Southern Ocean ◽

Distribution Patterns ◽

Zooplankton Distribution ◽

Four Seasons ◽

Indian Ocean Sector ◽

The Indian Ocean ◽

Ocean Sector

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Observations of watermass modification by mesoscale eddies in the subtropical frontal region of the Indian ocean sector of southern ocean

Deep Sea Research Part II Topical Studies in Oceanography ◽

10.1016/j.dsr2.2015.04.010 ◽

2015 ◽

Vol 118 ◽

pp. 152-161 ◽

Cited By ~ 8

Author(s):

P. Sabu ◽

Jenson V. George ◽

N. Anilkumar ◽

Racheal Chacko ◽

Vinu Valsala ◽

...

Keyword(s):

Indian Ocean ◽

Southern Ocean ◽

Mesoscale Eddies ◽

Frontal Region ◽

Indian Ocean Sector ◽

The Indian Ocean ◽

Ocean Sector

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Biological response to physical processes in the Indian Ocean sector of the Southern Ocean: a case study in the coastal and oceanic waters

Environmental Monitoring and Assessment ◽

10.1007/s10661-014-3990-4 ◽

2014 ◽

Vol 186 (12) ◽

pp. 8109-8124

Author(s):

N. Anilkumar ◽

Racheal Chacko ◽

P. Sabu ◽

Honey U. K. Pillai ◽

Jenson V. George ◽

...

Keyword(s):

Indian Ocean ◽

Southern Ocean ◽

Biological Response ◽

Physical Processes ◽

Indian Ocean Sector ◽

The Indian Ocean ◽

Ocean Sector

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Analysis of geomagnetic measurements prior the Maule (2010), Iquique (2014) and Illapel (2015) earthquakes, in the Pacific Ocean sector of the Southern Hemisphere

10.5194/angeo-2019-9 ◽

2019 ◽

Author(s):

Enrique G. Cordaro ◽

Patricio Venegas-Aravena ◽

David Laroze

Keyword(s):

Magnetic Field ◽

Geomagnetic Field ◽

Seismic Event ◽

Vertical Component ◽

Time Lapse ◽

Radial Component ◽

Cumulative Number ◽

Research Groups ◽

Low Frequencies ◽

Ocean Sector

Abstract. It has been possible to detect variations in the vertical component of the geomagnetic field (Bz) through its first and second derivate in a range of frequencies (microHz); these seem to be roughly related with some major seismic subduction events. We studied the period 2010–2015, analysing the daily values of magnetic records over periods close to the last three significant events that occurred through the Chilean margin, i. e., along a boundary between convergent plates that is characterized by the occurrence of seismic events of magnitude greater than Mw8. These are the events of Iquique 2014, Illapel 2015 and Maule 2010, all at different latitudes, on different dates and characterized by different types of margin (erosive or accretionary). Certain similarities were found in the associated magnetic field variations: 1) Variation in the radial or z component of the geomagnetic field and its first and second temporal derivative, modelled as a small jump, and small oscillations in the second derivative, generating a frequency band between 1c / 48.9 hours and 1c / 79.13 Hrs. 2) A variable time lapse of between 30 and 120 days; and 3) The seismic event. Furthermore, when analysing spectrograms for the second temporal derivate of the radial component, different behaviour is found related to its spectral density. This takes the form of an increase in ultra-low frequencies (0.01–0.4 mHz) between the start of the magnetic jump and the seismic event. These frequencies are lower than those found during the last years by research groups that related magnetic field and earthquakes, furthermore the concept of time lapse close to 30 days is in agreement with those research groups. The previous analyses may not be so robust, this is why additionally a new method is used with stations closer to the events and time periods of two years. We analysed the daily cumulative number of anomalous behaviour in z component of magnetic field on ground based magnetometers. The results show an increase in the number of magnetic anomalies prior to the occurrence of the three earthquakes. The behavior of the anomalies is similar to those presented by other authors for other earthquakes with similar methods in ionosphere. All this magnetic features might recover seismic information of the events and could be related with Lithosphere-Atmosphere-Ionosphere Coupling.

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