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El papel de los cambios en la superficie de la tierra en el calentamiento del verano ártico
F S Chapin1, M Sturm, M C Serreze
1Institute of Arctic Biology; University of Alaska Fairbanks, Fairbanks, AK 99775, USA. terry.chapin@uaf.edu
Science (New York, N.Y.)
|September 24, 2005
Resumen
El Ártico Ártico Alaska Alaska.
Área de la Ciencia:
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra
- Investigación del Ártico Investigación del Ártico
Sus antecedentes:
- Comprender las retroalimentaciones climáticas es crucial para predecir el clima futuro de la Tierra.
- El forzamiento de gases de efecto invernadero es un factor clave en el cambio climático.
Objetivo del estudio:
- Para investigar la contribución de los cambios terrestres en el albedo de verano a las tendencias de calentamiento en altas latitudes en el Ártico de Alaska.
- Para cuantificar el impacto del albedo alterado en el calentamiento atmosférico local.
Principales métodos:
- Síntesis de datos de campo de la región ártica de Alaska.
- Análisis de correlación entre el calentamiento del verano terrestre y la duración de la temporada sin nieve.
Principales resultados:
- Los cambios terrestres en el albedo veraniego contribuyen significativamente al reciente calentamiento en el Ártico de Alaska.
- La prolongación de la temporada libre de nieve ha aumentado el calentamiento atmosférico local en aproximadamente 3 vatios por metro cuadrado por década.
- La expansión continua de arbustos y árboles podría amplificar el calentamiento atmosférico de dos a siete veces.
Conclusiones:
- Los cambios en el albedo en el Ártico de Alaska son un importante impulsor del calentamiento regional.
- La expansión de la vegetación plantea un riesgo significativo de amplificar el futuro calentamiento del Ártico.
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