ESA - Eduspace ES - Cambio global - ¡Socorro! ¡Una enorme marea negra se acerca a la costa!

Cambios costales

Detección de cambios en el delta del Danubio Contaminación de aceite

Deforestación

Parque Nacional de Bardia Cuenca del río Congo Kameng-Sonitpur Kilimanjaro Rondonia Shillong y Guwahati

Hielo

Análisis de los glaciares mediante imágenes de radar La Antártida 2003 El cambio climático y los glaciares El retroceso de los glaciares alpinos Flujo glaciar Monitorización de los glaciares del Himalaya La teledetección de hielo y nieve

Urbanización

Córdoba El Cairo Katmandú Himalayas Valle de Katmandú Lagos

Vegetación

Área de Conservación de Annapurna Perdidos en los Andes Zona de Conservación de Ngorongoro (NCA)Delta interior del Níger La vegetación en América del Sur

Article Images

¡Socorro! ¡Una enorme marea negra se acerca a la costa!

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Fast delivery SAR products are proving to be of great value in the optimisation of air-borne surveillance resources, due to the large area they can image at any one time. Experiments show that in general slicks larger than 0.05 km2 can be spotted by both aircraft and spaceborne SAR with the same reliability.

Credits: Swedish Space Corporation

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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

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Black and white radar image of the ocean

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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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This coloured radar image of the ocean is composed of 3 images taken on 3 different days. In order to distinguish the information coming from each of these days, each image was given a different colour: