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Tropical rainforest response to marine sky brightening climate engineering

Muri, Helene; Niemeier, Ulrike; Kristjansson, Jon Egill
Journal article; PublishedVersion; Peer reviewed
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Muri_et_al-2015-Geophysical_Research_Letters.pdf (3.736Mb)
Year
2015
Permanent link
http://urn.nb.no/URN:NBN:no-62494

CRIStin
1234428

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  • Institutt for geofag [1428]
  • CRIStin høstingsarkiv [17026]
Original version
Geophysical Research Letters. 2015, 42 (8), 2951-2960, DOI: http://dx.doi.org/10.1002/2015GL063363
Abstract
Tropical forests represent a major atmospheric carbon dioxide sink. Here the gross primary productivity (GPP) response of tropical rainforests to climate engineering via marine sky brightening under a future scenario is investigated in three Earth system models. The model response is diverse, and in two of the three models, the tropical GPP shows a decrease from the marine sky brightening climate engineering. Partial correlation analysis indicates precipitation to be important in one of those models, while precipitation and temperature are limiting factors in the other. One model experiences a reversal of its Amazon dieback under marine sky brightening. There, the strongest partial correlation of GPP is to temperature and incoming solar radiation at the surface. Carbon fertilization provides a higher future tropical rainforest GPP overall, both with and without climate engineering. Salt damage to plants and soils could be an important aspect of marine sky brightening.
 
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