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El registro del cambio climático en las temperaturas subterráneas: una perspectiva global
1H. N. Pollack and S. Huang, Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109-1063, USA. P.-Y. Shen, Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada.
Science (New York, N.Y.)
|October 9, 1998
Resumen
La Tierra La Tierra La Tierra La Tierra La Tierra
Área de la Ciencia:
- La geofísica es la geofísica.
- Ciencias del clima Ciencias del clima Ciencias del clima
- Ciencias de la Tierra Ciencias de la Tierra
Sus antecedentes:
- El cambio climático global es un área importante de la investigación científica.
- Comprender las tendencias climáticas históricas es crucial para el modelado climático actual.
Objetivo del estudio:
- Para analizar las mediciones de temperatura subterráneas para reconstruir temperaturas superficiales pasadas.
- Para verificar de manera independiente los hallazgos recientes sobre el calentamiento del siglo XX.
Principales métodos:
- Análisis de datos de temperatura de 358 pozos de perforación en cuatro continentes.
- Interpretación de datos geotérmicos para inferir cambios históricos en la temperatura de la superficie.
Principales resultados:
- La temperatura media de la superficie de la Tierra aumentó en aproximadamente 0,5°C en el siglo XX.
- El siglo XX fue el más cálido en los últimos 500 años.
- Las temperaturas del subsuelo indican un calentamiento de 1.0°C en los últimos cinco siglos.
Conclusiones:
- Los datos geotérmicos proporcionan evidencia independiente de un calentamiento climático significativo en el siglo XX.
- Los hallazgos corroboran estudios multiproxy sobre condiciones climáticas inusuales del siglo XX.
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