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Nitrógeno terrestre y gases nobles en los suelos lunares
1Graduate School of Earth and Planetary Science, University of Tokyo, Tokyo 113-0033, Japan. EZZ03651@nifty.ne.jp
Nature
|August 5, 2005
Resumen
El nitrógeno en los suelos lunares puede provenir de la atmósfera de la Tierra, no solo del viento solar. Esto sugiere que los suelos lunares podrían revelar cuándo apareció por primera vez el campo geomagnético de la Tierra.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La geoquímica es la geoquímica.
- La astrofísica es la astrofísica.
Sus antecedentes:
- El nitrógeno en los suelos lunares está correlacionado con la superficie, lo que sugiere una implantación externa.
- El viento solar es la principal fuente propuesta, pero tiene dificultades para explicar la abundancia de nitrógeno y las variaciones isotópicas.
Objetivo del estudio:
- Proponer y evaluar una fuente alternativa para el nitrógeno del suelo lunar y otros volátiles.
- Para investigar el potencial de la composición del suelo lunar como un sustituto de las primeras condiciones de la Tierra.
Principales métodos:
- Análisis comparativo del viento solar frente a los modelos de implantación atmosférica terrestre.
- Inferencia basada en la necesidad de un campo geomagnético inexistente para el escape y la implantación atmosférica.
Principales resultados:
- La implantación atmosférica terrestre es cuantitativamente plausible bajo condiciones específicas de la Tierra primitiva.
- Los suelos lunares pueden preservar evidencia de la composición atmosférica de la Tierra y la historia del campo geomagnético.
Conclusiones:
- La atmósfera de la Tierra es una fuente potencial significativa de nitrógeno y volátiles del suelo lunar.
- El estudio de los suelos lunares puede proporcionar restricciones sobre el origen y el momento del campo geomagnético de la Tierra.
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