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Laser-Induced Fluorescence Emission L.I.F.E. as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats
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El compromiso de varios milenios de la Antártida con el futuro aumento del nivel del mar

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El calentamiento global que exceda de 1,5-2°C pone en riesgo el colapso irreversible de la capa de hielo antártica y el aumento significativo del nivel del mar. Limitar las emisiones al RCP 2.6 es crucial para evitar esta pérdida de hielo a largo plazo.

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Área de la Ciencia:

  • Ciencias del clima
  • Glaciología
  • Investigación sobre el aumento del nivel del mar

Sus antecedentes:

  • El calentamiento atmosférico proyectado aumentará las temperaturas superficiales medias globales.
  • La respuesta de la capa de hielo al calentamiento tiene escalas de tiempo más largas que la atmósfera o el océano.
  • Cuantificar la contribución de las capas de hielo al aumento del nivel del mar es un desafío.

Objetivo del estudio:

  • Para modelar la respuesta de la capa de hielo antártica a los escenarios de cambio climático.
  • Para evaluar el impacto del colapso de la plataforma de hielo en el aumento del nivel del mar.
  • Determinar los umbrales de emisión para evitar la pérdida irreversible del hielo antártico.

Principales métodos:

  • Utilizó un modelo de capa de hielo y plataforma de hielo acoplados.
  • Simuló la respuesta de la capa de hielo antártica a cuatro vías de concentración representativas (RCP).
  • Analizó la dinámica de las capas de hielo de escala centenaria a milenaria.

Principales resultados:

  • El calentamiento superior a 1,5-2 ° C desencadena el colapso de la plataforma de hielo antártica y el aumento del flujo viscoso.
  • Este colapso compromete a la capa de hielo antártica al aumento del nivel del mar a largo plazo.
  • Solo las emisiones limitadas al RCP 2.6 pueden evitar una pérdida sustancial de hielo antártico.

Conclusiones:

  • Las emisiones de gases de efecto invernadero en las próximas décadas determinarán la contribución futura de la Antártida al aumento del nivel del mar.
  • Los escenarios de emisiones más altas (por encima de RCP 2.6) proyectan un aumento del nivel del mar de 0,6 a 3 metros para 2300 debido a la pérdida de hielo en la Antártida.
  • Las reducciones urgentes de emisiones son necesarias para mitigar el grave aumento del nivel del mar a largo plazo debido al derretimiento del hielo antártico.