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Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
Published on: September 12, 2017
Dinámica del carbono del suelo durante la deglaciación de la capa de hielo laurentida
Resumen
El derretimiento de la capa de hielo de América del Norte condujo a la captura de carbono en el suelo. Si bien la absorción de carbono de las turberas continúa, las tasas naturales de almacenamiento de carbono en el suelo son menores en comparación con las emisiones humanas de CO2.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Ciencias del suelo Ciencias del suelo.
- Investigación del ciclo del carbono.
Sus antecedentes:
- La deglaciación de la capa de hielo de Laurentide expuso vastas áreas de América del Norte.
- Los suelos recién expuestos tienen el potencial de secuestrar el carbono atmosférico.
- Comprender las dinámicas pasadas de secuestro de carbono es crucial para predecir futuros presupuestos de carbono.
Objetivo del estudio:
- Investigar el tiempo y las tasas de secuestro de carbono orgánico en los suelos después de la deglaciación de la capa de hielo de Laurentide.
- Para evaluar el secuestro de carbono en curso en las turberas deglaciadas.
- Para comparar las tasas de secuestro de carbono natural del suelo con la producción antropogénica de dióxido de carbono.
Principales métodos:
- Análisis de registros geológicos y del suelo para determinar la exposición de la tierra y los plazos de acumulación de carbono.
- La datación por radiocarbono para establecer cronologías del desarrollo del suelo y el enterramiento de carbono.
- Estimación de las tasas de secuestro de carbono basadas en el contenido de carbono orgánico del suelo y los entornos de deposición.
Principales resultados:
- La exposición más rápida a la tierra se produjo entre hace 12.000 y 8.000 años.
- La tasa más alta de secuestro de carbono en el suelo se observó desde hace 8.000 a 4.000 años.
- El secuestro de carbono en las turberas es un proceso continuo, y aún no se ha logrado un estado estacionario.
Conclusiones:
- La deglaciación inició un importante secuestro de carbono orgánico en el suelo en América del Norte.
- El secuestro natural de carbono en el suelo, aunque es importante, actualmente está superado por las emisiones antropogénicas de CO2.
- El monitoreo continuo de la dinámica del carbono de las turberas es esencial para comprender el ciclo del carbono contemporáneo.
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