Relationships between photosynthesis and formaldehyde as a probe of isoprene emission

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

doi:10.5194/acp-15-8559-2015

Articles | Volume 15, issue 15

https://doi.org/10.5194/acp-15-8559-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-15-8559-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 15

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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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.