Enhanced global primary production by biogenic aerosol via diffuse radiation fertilisation

Rap, A and Scott, C and Reddington, C and Mercado, L and Ellis, R and Garraway, S and Evans, M and Beerling, D and MacKenzie, A R and Hewitt, C N and Spracklen, D V (2018) Enhanced global primary production by biogenic aerosol via diffuse radiation fertilisation. Nature Geoscience, 11. pp. 640-644. ISSN 1752-0894

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Abstract

Terrestrial vegetation releases large quantities of plant volatiles into the atmosphere that can then oxidise to form secondary organic aerosol. These particles affect plant productivity via the diffuse radiation fertilisation effect through altering the balance between direct and diffuse radiation reaching the Earth’s surface. Here, using a suite of models describing relevant coupled components of the Earth system, we quantify the impacts of biogenic secondary organic aerosol on plant photosynthesis via this fertilisation effect. We show that this leads to a net primary productivity enhancement of 1.23 Pg C a-1 (range 0.75-1.62 Pg C a-1 due to uncertainty in biogenic secondary organic aerosol formation). Notably, this productivity enhancement is twice the mass of biogenic volatile organic compound emissions (and ~30 times larger than the mass of carbon in biogenic secondary organic aerosol) causing it. Hence, our simulations indicate that there is a strong positive ecosystem feedback between biogenic volatile organic compound emissions and plant productivity via plant-canopy light-use efficiency. We estimate a gain of 1.07 in global biogenic volatile organic compound emissions resulting from this feedback.

Item Type:
Journal Article
Journal or Publication Title:
Nature Geoscience
Additional Information:
© 2018 Springer Nature Limited. All rights reserved. The Author's Accepted Manuscript (the accepted version of the manuscript as submitted by the author) may only be posted 6 months after the paper is published, consistent with our self-archiving embargo. Please note that the Author’s Accepted Manuscript may not be released under a Creative Commons license. For Nature Research Terms of Reuse of archived manuscripts please see: http://www.nature.com/authors/policies/license.html#terms
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900
Subjects:
ID Code:
126350
Deposited By:
Deposited On:
18 Jul 2018 13:48
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Sep 2020 07:58