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La evidencia satelital de una cubierta de hielo marino del Ártico en transformación
1Nansen Environmental and Remote Sensing Center, Edvard Griegsvei 3a, 5059 Bergen, Norway. Geophysical Institute, University of Bergen, 5007 Bergen, Norway. Nansen International Environmental and Remote Sensing Center, Korpusnaya ulitsa 18, 197110 St. Petersburg, Russia. Department of Geography, University of Bergen, Breiviksveien 40, 5045 Bergen, Norway.
Science (New York, N.Y.)
|December 3, 1999
Resumen
La extensión del hielo marino del Ártico ha disminuido en un 3% por década desde 1978. El hielo plurianual ha disminuido en un 14%, lo que indica cambios sustanciales en la capa de hielo del Ártico.
Área de la Ciencia:
- Ciencias ambientales Ciencias ambientales.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- La detección remota con sensores.
Sus antecedentes:
- La extensión del hielo marino del Ártico muestra una reducción del 3% por década desde 1978.
- Los cambios en la naturaleza de la capa de hielo perenne siguen sin estar claros.
Objetivo del estudio:
- Cuantificar los cambios en la composición del hielo marino del Ártico utilizando datos satelitales.
- Investigar la transformación de la capa de hielo del Ártico.
Principales métodos:
- Utilizó datos de teledetección de satélite de microondas.
- Se analizaron los cambios en la composición de la cubierta de hielo de 1978 a 1998.
Principales resultados:
- Se observó una reducción del 14% en el área de hielo plurianual invernal entre 1978 y 1998.
- Se encontró una fuerte correlación entre el área de hielo plurianual y el grosor de la capa de hielo perenne.
- Las disminuciones de superficie derivadas de satélites sugieren cambios significativos, no periféricos.
Conclusiones:
- La capa de hielo del Ártico está experimentando una transformación sustancial.
- Los cambios continuos pueden conducir a un régimen de hielo ártico diferente.
- El intercambio de calor/masa alterado y la estratificación de los océanos son consecuencias potenciales.
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