Articles | Volume 15, issue 15
https://doi.org/10.5194/acp-15-8559-2015
https://doi.org/10.5194/acp-15-8559-2015
Research article
 | 
03 Aug 2015
Research article |  | 03 Aug 2015

Relationships between photosynthesis and formaldehyde as a probe of isoprene emission

Y. Zheng, N. Unger, M. P. Barkley, and X. Yue

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AR by Yiqi Zheng on behalf of the Authors (29 Jun 2015)  Author's response   Manuscript 
ED: Publish as is (21 Jul 2015) by Silvia Kloster
AR by Yiqi Zheng on behalf of the Authors (21 Jul 2015)
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Short summary
We apply two global observational data sets, gross primary productivity (GPP) and tropospheric formaldehyde column variability (HCHOv), to probe isoprene emission variability on large spatiotemporal scales. GPP and HCHOv are decoupled or weakly anticorrelated in regions and seasons when isoprene emission is high. Isoprene emission models that include soil moisture dependence demonstrate greater skill in reproducing observed seasonal GPP-HCHOv correlations in the southeast US and the Amazon.
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