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El presupuesto mundial para el hidrógeno

Zutao Ouyang1,2, Robert B Jackson3,4,5, Marielle Saunois6

  • 1Department of Earth System Science, Stanford University, Stanford, CA, USA.

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Este resumen es generado por máquina.

El hidrógeno (H2) es crucial para la descarbonización, pero tiene impactos climáticos. Este estudio cuantifica las fuentes de H2, los sumideros y su efecto de calentamiento, revelando un aumento de 0.02°C entre 2010 y 2020.

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Área de la Ciencia:

  • Química atmosférica y ciencias del clima
  • Ciencias ambientales y sostenibilidad
  • Política energética y mitigación del clima

Sus antecedentes:

  • El hidrógeno (H2) se propone como un portador de energía clave para la descarbonización.
  • Sin embargo, el potencial indirecto de calentamiento global del H2 requiere una comprensión completa de sus interacciones atmosféricas.
  • Existen preocupaciones con respecto a las consecuencias climáticas de la expansión de las economías de H2.

Objetivo del estudio:

  • Para analizar las fuentes y sumideros globales de H2 de 1990 a 2020.
  • Elaborar un presupuesto integral para el segundo semestre de la década 2010-2020.
  • Evaluar el impacto del aumento del H2 atmosférico en la temperatura global del aire de superficie (GSAT).

Principales métodos:

  • Análisis de las tendencias de las fuentes y sumideros mundiales de H2 durante tres décadas.
  • Elaboración de un presupuesto detallado para el segundo semestre del período 2010-2020.
  • Estimación de los cambios de GSAT atribuidos a los aumentos de H2 atmosférico.

Principales resultados:

  • Las fuentes y sumideros globales de H2 aumentaron entre 1990 y 2020, impulsados por la oxidación del metano, los COV, la fijación de nitrógeno y la fuga de producción de H2.
  • El promedio estimado de fuentes y sumideros de H2 para 2010-2020 fue de 69,9 ± 9,4 Tg/año y 68,4 ± 18,1 Tg/año, respectivamente.
  • El aumento del H2 atmosférico entre 2010 y 2020 contribuyó a un aumento de GSAT de 0,02 ± 0,006 °C.

Conclusiones:

  • Un presupuesto integral de hidrógeno es esencial para gestionar los riesgos ambientales asociados con las futuras economías de hidrógeno.
  • El análisis regional muestra que África y América del Sur son las principales fuentes y sumideros de H2, mientras que el este de Asia y América del Norte lideran las emisiones de combustibles fósiles.
  • Se prevé que los impactos futuros de GSAT sigan siendo modestos (0,01-0,05 °C), pero dependen del uso de H2, las fugas y las emisiones de metano.