Articles | Volume 14, issue 8
Geosci. Model Dev., 14, 5239–5268, 2021
https://doi.org/10.5194/gmd-14-5239-2021
Geosci. Model Dev., 14, 5239–5268, 2021
https://doi.org/10.5194/gmd-14-5239-2021

Model evaluation paper 20 Aug 2021

Model evaluation paper | 20 Aug 2021

Improvements to the representation of BVOC chemistry–climate interactions in UKCA (v11.5) with the CRI-Strat 2 mechanism: incorporation and evaluation

James Weber et al.

Data sets

Z2F Brazil Observational used for CRI-STRAT 2 Evaluation James Weber and Thomas Bannan https://doi.org/10.17863/CAM.65133

Merged data file for SEAC4RS, Flight 01 (20130806), on the dc8 platform J. Chen https://www-air.larc.nasa.gov/cgi-bin/ArcView/seac4rs?MERGE=1#60_SECOND.DC8_MRG

Acetone canopy gradient concentration A. M. Yáñez-Serrano https://www.attodata.org/ddm/data/Showdata/72

Isoprene canopy gradient concentration A. M. Yáñez-Serrano https://www.attodata.org/ddm/data/Showdata/73

Isoprene oxidation products canopy gradient concentration A. M. Yáñez-Serrano https://www.attodata.org/ddm/data/Showdata/74

Monoterpenes canopy gradient concentration A. M. Yáñez-Serrano https://www.attodata.org/ddm/data/Showdata/77

OP3 Project: Airborne and Ground-based Meteorological Instruments Records as part of the Oxidant and Particle Photochemical Processes above a South-East Asian tropical rain forest Natural Environment Research Council, N. Hewitt, P. Edwards, C. Helfter, M. Irwin, A. Karunaharan, J. D. Lee, H. Newton, N. Robinson, and J. Ryder http://catalogue.ceda.ac.uk/uuid/9279c7e807a2ef0eb78a03c3821e62c4

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Short summary
The new mechanism CRI-Strat 2 features state-of-the-art isoprene chemistry not previously available in UKCA and improves UKCA's ability to reproduce observed concentrations of isoprene, monoterpenes, and OH in tropical regions. The enhanced ability to model isoprene, the most widely emitted non-methane volatile organic compound (VOC), will allow understanding of how isoprene and other biogenic VOCs affect atmospheric composition and, through biosphere–atmosphere feedbacks, climate change.