ESA - Eduspace FR - Changement global - Contribuer à un océan plus propre

Changements côtiers

Déforestation

Parc National de Bardia Bassin du Congo Kameng-Sonitpur Le Kilimandjaro Rondonia Shillong et Guwahati

La Glace

Analyse des glaciers avec l'imagerie radar Antarctica 2003 Changement climatique et glaciers Retrait des glaciers dans les Alpes L'écoulement des masses glaciaires Surveillance des glaciers de l'Himalaya La télédétection de la glace et de la neige

Urbanisation

Córdoba Le Caire Katmandou L'Himalaya Vallée de Katmandou Lagos

Végétation

Aire de Conservation de l’Annapurna Perdus dans les Andes Zone de Conservation du Ngorongoro Delta intérieur du Niger Amérique du Sud

Article Images

Contribuer à un océan plus propre

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Braer oilspill, Shetland Islands, Scotland

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The Braer oilspill disaster, Shetland Islands, Scotland, January 1993.

Credits: Greenpeace

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Ship dumping sewage in the North Sea.

Credits: Greenpeace/Morgan

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The biggest contributor to oil pollution in the world's oceans is operational discharges from tankers. That is oil dumped during cleaning operations. The amount of oil introduced in the sea by such operations is equivalent to one full tanker disaster every week.

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In a radar image the ocean is black and white

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In a radar image the ocean is not blue but black and white and may also appear to have a lot of strange features. As a general rule, the brighter the sea surface, the rougher the sea (because wind speed is higher). But oil on the water dampens the rough surface and it becomes smooth again, and dark, as is shown in the image.

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Like its predecessor ERS-1 (launched in July 1991 by Ariane 4, the ERS-2 satellite (launched on 21 April 1995 also by Ariane 4) monitors the ground day and night under all weather conditions thanks to its powerful sharp-eyed, cloud-piercing radars. ERS-2 also carries an instrument to help monitor the ozone layer.

Credits: ESA

Marées noires

Introduction

Exercices

Au secours! Une immense marée noire s’approche des côtes!Catastrophe environnementale due à une installation pétrolière

Liens

Norwegian Pollution Control Authority (SFT)

Eduspace - Logiciels

LEOWorks 3

Eduspace - Télécharger

Oil rig environmental disaster (PDF)Help! A huge oil slick is approaching the coast!Help! A huge oil slick is approaching the coast! (using LEOWorks)Help! A huge oil slick is approaching the coast! (report form)Contributing to a cleaner ocean Contributing to a cleaner ocean (report form)Contribution to a cleaner ocean (LEOWorks)