Global variability in isoprenoid emissions: divergent responses to warming and drought driven by physiochemical controls

Global variability in isoprenoid emissions: divergent responses to warming and drought driven by physiochemical controls | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Plant, Cell & Environment This is a preprint and has not been peer reviewed. Data may be preliminary. 28 October 2025 V1 Latest version Share on Global variability in isoprenoid emissions: divergent responses to warming and drought driven by physiochemical controls Authors : Jungang Chen 0000-0002-5429-7079 , Jing Tang 0000-0001-7961-8214 , Riikka Rinnan 0000-0001-7222-700X , and Biao Zhu [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.176165479.97964862/v1 Published Plant, Cell & Environment Version of record Peer review timeline 226 views 162 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Climate change alters phytogenic volatile organic compound (VOC) emissions, yet a quantitative understanding of the interactive effects of warming and drought across plant types and physiological mechanisms remains limited. Here, we quantify the impacts of warming and drought on isoprene and monoterpene (MT) emissions through a meta-analysis of field and greenhouse experiments, complemented by machine learning simulations, and map their spatial distribution. Globally, warming increased isoprene and MT emissions by 107% and 60%, respectively, while drought reduced them by 27% and 33%. Combined warming and drought increased MT emissions by 37%. Warming-induced increases in isoprene emissions were positively correlated with changes in photosynthetic electron transport rate ( J f), whereas MT responses declined at higher mean annual temperatures. Under drought, although decoupled from photosynthesis, the responses of both compounds remained positively associated with those of stomatal conductance ( g s). Spatially, +1 °C warming elicited the strongest responses at high altitudes/latitudes (e.g., Siberian Plateau, Arctic, Tibetan Plateau). Under a low emission scenario (SSP1-1.9), responses resembled historical trends, while a high emission scenario (SSP5-8.5) amplified isoprene emissions in C 4 vegetation-dominated regions and suppressed MT responses in boreal coniferous forests. Our findings reveal distinct physiological controls: isoprene exhibits thermal resilience, MT remains temperature-sensitive, and both compounds are regulated by g s during drought. These response patterns vary significantly with plant functional type, experimental design and duration, and initial climate conditions. These mechanistic insights can inform the selection of low-emission plant species, and adaptation strategies for vulnerable ecosystems, thereby helping to mitigate air quality and climate feedbacks under future warming and drought conditions. Supplementary Material File (bvoc-text-1028.docx) Download 2.20 MB Information & Authors Information Version history V1 Version 1 28 October 2025 Peer review timeline Published Plant, Cell & Environment Version of Record 16 Apr 2026 Published Copyright This work is licensed under a Non Exclusive No Reuse License. Collection Plant, Cell & Environment Keywords biogenic volatile organic compounds drought photosynthesis: electron transport temperature volatile emissions warming Authors Affiliations Jungang Chen 0000-0002-5429-7079 Beijing Normal University State Key Laboratory of Earth Surface Processes and Resource Ecology View all articles by this author Jing Tang 0000-0001-7961-8214 Copenhagen Economics A/S View all articles by this author Riikka Rinnan 0000-0001-7222-700X Copenhagen Economics A/S View all articles by this author Biao Zhu [email protected] Beijing Normal University State Key Laboratory of Earth Surface Processes and Resource Ecology View all articles by this author Metrics & Citations Metrics Article Usage 226 views 162 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Jungang Chen, Jing Tang, Riikka Rinnan, et al. Global variability in isoprenoid emissions: divergent responses to warming and drought driven by physiochemical controls. Authorea . 28 October 2025. DOI: https://doi.org/10.22541/au.176165479.97964862/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . Format Please select one from the list RIS (ProCite, Reference Manager) EndNote BibTex Medlars RefWorks Direct import Tips for downloading citations document.getElementById('citMgrHelpLink').addEventListener('click', function() { popupHelp(this.href); return false; }); $(".js__slcInclude").on("change", function(e){ if ($(this).val() == 'refworks') $('#direct').prop("checked", false); $('#direct').prop("disabled", ($(this).val() == 'refworks')); }); View Options View options PDF View PDF Figures Tables Media Share Share Share article link Copy Link Copied! Copying failed. 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