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Aumentos impulsados por el clima en la producción primaria terrestre neta mundial desde 1982 hasta 1999
Ramakrishna R Nemani1, Charles D Keeling, Hirofumi Hashimoto
1School of Forestry, University of Montana, Missoula, MT 59801, USA. nemani@ntsg.umt.edu
Science (New York, N.Y.)
|June 7, 2003
Resumen
El cambio climático global ha impulsado el crecimiento de las plantas, aumentando la producción primaria neta en un 6% en todo el mundo. Esta mejora se debe en gran medida a las restricciones climáticas aliviadas, con las selvas tropicales del Amazonas mostrando las ganancias más significativas.
Área de la Ciencia:
- Ecología Ecología Ecología.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- La detección remota con sensores.
Sus antecedentes:
- Los recientes cambios climáticos han promovido el crecimiento de la vegetación en latitudes más altas.
- Los análisis anteriores carecían de una visión integral de los impactos del cambio climático en la productividad de la vegetación teniendo en cuenta factores variables limitantes.
Objetivo del estudio:
- Para llevar a cabo una investigación global sobre las respuestas de la vegetación a los cambios climáticos.
- Analizar la influencia de factores variables limitantes en el crecimiento de las plantas bajo el cambio climático.
Principales métodos:
- Análisis de 18 años (1982-1999) de los datos climáticos.
- Utilizando observaciones satelitales de la actividad de la vegetación.
- Evaluación de los cambios en la producción primaria neta (PPN).
Principales resultados:
- La producción primaria neta mundial aumentó un 6% (3,4 petagramos de carbono) en 18 años.
- Los cambios climáticos aliviaron las restricciones críticas al crecimiento de las plantas.
- Los ecosistemas tropicales, particularmente las selvas tropicales del Amazonas, mostraron el mayor aumento en las centrales nucleares, impulsadas por la reducción de la cobertura de nubes y el aumento de la radiación solar.
Conclusiones:
- El cambio climático global tiene un impacto positivo en la productividad de la vegetación.
- La reducción de la cobertura de nubes y el aumento de la radiación solar son factores clave para mejorar las centrales nucleares en las regiones tropicales.
- El estudio destaca el importante papel de los ecosistemas tropicales en el secuestro global de carbono bajo condiciones climáticas cambiantes.
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