The french national programme for claiming continental shelf beyond 200 Miles
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1 The french national programme for claiming continental shelf beyond 200 Miles Using global bathymetric models in the context of an Extended Continental Shelf submission EXTRAPLAC Using Global Bathymetric models
2 The french national programme for claiming the continental shelf beyond 200 M EXTRAPLAC Using Global Bathymetric models 2 /49
3 An introduction to E.C.S Building a submission The french experience Using global bathymetric models Conclusions EXTRAPLAC Using Global Bathymetric models 3 /49
4 UNLCOS Article 76 E.C.S EXTRAPLAC Using Global Bathymetric models 4 /49
5 UNLCOS Article 76 EXTRAPLAC Using Global Bathymetric models 5 /49
6 UNLCOS Article 76 The continental shelf of a coastal State : Is the natural prolongation of the landmass Extends to the outer edge of the continental margin The outer limit of the continental shelf is defined by points distant from each other less than 60 M These points may not lie beyond 350 M from the territorial sea baselines or 100 M from the isobath 2,500 m These points must satisfy one of two criteria : the Hedberg criterion or the Gardiner criterion EXTRAPLAC Using Global Bathymetric models 6 /49
7 UNLCOS Article 76 The Hedberg criterion EXTRAPLAC Using Global Bathymetric models 7 /49
8 UNLCOS Article 76 The Gardiner criterion EXTRAPLAC Using Global Bathymetric models 8 /49
9 UNLCOS Article miles Outer limit 100 miles 60 miles Isobath 2500 m Miles FOS + 60 M 200 miles Sediment thickness 1% Foot of slope Isobathe 2500 m EXTRAPLAC Using Global Bathymetric models 9 /49
10 Claiming extended C.S The State makes a submission to the U.N containing data and documents to support its claim The submission is examined by the Commission for the Limits of the Continental Shelf (CLCS) The CLCS is composed of 21 scientific experts elected among states parties to the convention. The CLCS examines the E.C.S limits submitted by the State and produces recommandations. EXTRAPLAC Using Global Bathymetric models 10 /49
11 CLCS Scientific and technical guidelines In 1999, the CLCS adopted its scientific and technical guidelines primarily intended to assist coastal States in preparing their submissions. also designed to provide an important scientific and technical reference for the consideration of these submissions and the preparation of the Commission's own recommendations. form the basis on which the Commission shall provide advice, if requested by coastal States during the preparation of their necessary data. EXTRAPLAC Using Global Bathymetric models 11 /49
12 CLCS Scientific and technical guidelines 4.2. Sources of data and hydrographic measurements The complete bathymetric database used in the delineation of the 2,500 m isobath in a submission may only include a combination of the following data: Single-beam echo sounding measurements; Multi-beam echo sounding measurements; Bathymetric side-scan sonar measurements; Interferometric side-scan sonar measurements; and Seismic reflection-derived bathymetric measurements. EXTRAPLAC Using Global Bathymetric models 12 /49
13 CLCS Scientific and technical guidelines Other sources of evidence, such as satellite altimetry-derived bathymetric data or imaging side-scan sonar information, will not be regarded as admissible for the purpose of delineating the 2,500 m isobath. This information, however, might be useful as additional qualitative information in support of other parts of a submission but will not be considered during the determination of this or any other isobaths. However, this data will be considered admissible as supporting information in a submission. EXTRAPLAC Using Global Bathymetric models 13 /49
14 Global bathymetric models and Article 76 Altimetry predicted and Gebco bathymetric models are not acceptable to determine E.C.S limits. However, they are the only comprehensive data sources in offshore areas concerned by an E.C.S submission Although they are not acceptable to locate important features like the 2,500 m isobath and the foot of slope in the final submission they are widely used at different stages while building an E.C.S submission EXTRAPLAC Using Global Bathymetric models 14 /49
15 E.C.S claiming process Desktop study Data acquisition Data processing and interpretation Writing the submission and GIS Deposit to the U.N Examination by the CLCS and interactions with the State Adoption of the recommandation EXTRAPLAC Using Global Bathymetric models 15 /49
16 E.C.S claiming process Possibility for a State to provide Preliminary Information before making a full submission : Desktop study only Does not require data acquisition before making a full submission France has made preliminary information for 3 areas and full submissions for 8 areas. Two of these 8 sumbissions are joint submissions. EXTRAPLAC Using Global Bathymetric models 16 /49
17 EXTRAPLAC Using Global Bathymetric models 17 /49
18 The E.C.S claimed by France EEZ E.C.S Guadeloupe & Martinique North Atlantic Ocean Bay of Biscay Joint submission by France, Ireland, Spain and U.K French Guiana Recommandation adopted Sept.2009 Recommandation adopted feb.2009 EXTRAPLAC Using Global Bathymetric models 18 /49
19 The E.C.S claimed by France EEZ E.C.S Saint-Pierre et Miquelon La Réunion St Paul & Amsterdam Indian Ocean Crozet North Atlantic Ocean Kerguelen EXTRAPLAC Using Global Bathymetric models 19 /49
20 The E.C.S claimed by France EEZ E.C.S Wallis & Futuna French Polynesia Recommandation adopted Sept.2009 New Caledonia South Pacific Ocean EXTRAPLAC Using Global Bathymetric models 20 /49
21 E.C.S claiming process Desktop study Data acquisition Data processing and interpretation Writing the submission and GIS Deposit to the U.N Examination by the CLCS and interactions with the State Adoption of the recommandation EXTRAPLAC Using Global Bathymetric models 21 /49
22 The desktop study The desktop study aims at : Check the States entitlement to E.C.S Assess limits of the E.C.S Assess data to be collected at sea EXTRAPLAC Using Global Bathymetric models 22 /49
23 The desktop study Bathymetric data sources ETOPO 2 GEBCO 1 EXTRAPLAC Using Global Bathymetric models 23 /49
24 The desktop study Constraint line assessement using Gebco 1 grid EXTRAPLAC Using Global Bathymetric models 24 /49
25 The desktop study Assessing foot of slope (FOS) location on GEBCO 1 Bay of Biscay EXTRAPLAC Using Global Bathymetric models 25 /49
26 The desktop study Assessing FOS location (French Antilles) Using Etopo 2 Using GEBCO 1 EXTRAPLAC Using Global Bathymetric models 26 /49
27 The desktop study Combined with sediment thickness model to assess Gardiner line EXTRAPLAC Using Global Bathymetric models 27 /49
28 The desktop study Finding critical FOS positions (Gebco 1 Bay of Biscay) EXTRAPLAC Using Global Bathymetric models 28 /49
29 The desktop study Compute 60 M Hedberg line to locate contributing FOSs EXTRAPLAC Using Global Bathymetric models 29 /49
30 The desktop study Planning Shiptracks - Kerguelen Is. EXTRAPLAC Using Global Bathymetric models 30 /49
31 The submission : data acquisition & use of existing data For the specific purpose of E.C.S delimitation and claim, France and its partners in joint submissions have collected : multibeam echosounder data to prove natural prolongation, locate the foot of slope and the 2,500m isobath Gravity and magnetism measurements to support geological considerations Seismics to support geological consideration an determine the Gardiner line when where it is likely to overcome the Hedberg line EXTRAPLAC Using Global Bathymetric models 31 /49
32 MBES acquisition Bay of Biscay (with Ireland, Spain and U.K) EXTRAPLAC Using Global Bathymetric models 32 /49
33 MBES acquisition French Antilles EXTRAPLAC Using Global Bathymetric models 33 /49
34 MBES acquisition French Guiana EXTRAPLAC Using Global Bathymetric models 34 /49
35 MBES acquisition La Réunion EXTRAPLAC Using Global Bathymetric models 35 /49
36 MBES DATA Kerguelen EXTRAPLAC Using Global Bathymetric models 36 /49
37 MBES acquisition Saint-Paul & Amsterdam EXTRAPLAC Using Global Bathymetric models 37 /49
38 MBES acquisition Crozet (FR) and Prince Edward Is. (S.A) EXTRAPLAC Using Global Bathymetric models 38 /49
39 The submission & its examination by the CLCS Use of bathymetric data Bathymetric data are mainly used to : Prove natural prolongation Support geological context (MBES + global) Show morphologic continuity to FOS (MBES) Locate 2,500m isobath Locate the base of slope : FOS is at the maximum change of gradient at the base of the slope (MBES) Is also supported by geological and geophysical considerations (geophysical, MBES, global) Locate FOS By calculating second derivative grids (MBES) EXTRAPLAC Using Global Bathymetric models 39 /49
40 The submission & its examination by the CLCS Use of bathymetric data Prove natural prolongation Support geological context EXTRAPLAC Using Global Bathymetric models 40 /49
41 The submission & its examination by the CLCS Use of bathymetric data Locate 2,500m isobath EXTRAPLAC Using Global Bathymetric models 41 /49
42 The submission & its examination by the CLCS Use of bathymetric data Locate the base of slope : EXTRAPLAC Using Global Bathymetric models 42 /49
43 The submission & its examination by the CLCS Use of bathymetric data Locate the base of slope :supported by geological and geophysical considerations (geophysical, MBES, global) EXTRAPLAC Using Global Bathymetric models 43 /49
44 The submission & its examination by the CLCS Use of bathymetric data Locate the base of slope :supported by geological and geophysical considerations (geophysical, MBES, global) EXTRAPLAC Using Global Bathymetric models 44 /49
45 Depth (m) The submission & its examination by the CLCS Use of bathymetric data Prove natural prolongation - Show morphologic continuity to FOS (MBES) Detailed bathymetric profile from Goban to deep ocean floor 0 South North-East Goban Spur N. Menez Braz S. Menez Braz Deep ocean floor Vertical exaggeration = 35 Bathymetry Distance (km) EXTRAPLAC Using Global Bathymetric models 45 /49
46 The submission & its examination by the CLCS Use of bathymetric data Prove natural prolongation Show morphologic continuity to FOS (MBES) EXTRAPLAC Using Global Bathymetric models 46 /49
47 The submission & its examination by the CLCS Use of bathymetric data Locate FOS By calculating second derivative grids (MBES) EXTRAPLAC Using Global Bathymetric models 47 /49
48 Conclusions Global bathymetric models such as Etopo and Gebco are essential in the process of an E.C.S claim. Make desktop study possible Help plan cruises Support the argumentation in the sumbission, and during the process of examination by the CLCS EXTRAPLAC Using Global Bathymetric models 48 /49
49 Conclusions Desktop Study (GDA ) 68 to Sq Kms Recommendation to France Sq Kms EXTRAPLAC Using Global Bathymetric models 49 /49
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