edu.ucar.opensky::articles:43727 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:50:24.346961 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d7v98dhq https://doi.org/10.5281/ZENODO.15262184 https Related Software #1 Optimizing the Temperature Sensitivity of the Isoprene Emission Model MEGAN in Different Ecosystems Using a Metropolis-Hastings Markov Chain Monte Carlo Method https://doi.org/10.5281/zenodo.5748260 https Related Software #2 geoschem/GCClassic: GEOS-Chem 13.3.3 Optimizing the temperature sensitivity of the isoprene emission model MEGAN in different ecosystems using a Metropolis‐Hastings Markov Chain Monte Carlo method 2025-05-01T00:00:00Z publication https://n2t.net/ark:/85065/d7v98dhq https://doi.org/10.1029/2025JG008806 DiMaria, C. A. author Jones, D. B. A. author Ferracci, V. author Bloom, A. A. author Worden, Helen M. author Seco, R. author L. Vettikkat author Yáñez‐Serrano, A. M. author Guenther, A. B. author Araujo, A. author Goldstein, A. H. author Langford, B. author Cash, J. author Harris, N. R. P. author Brown, L. author R. Rinnan author Schobesberger, S. author T. Holst author Mak, J. E. author UCAR/NCAR - Library publisher Isoprene is a reactive hydrocarbon emitted to the atmosphere in large quantities by terrestrial vegetation. Annual total isoprene emissions exceed 300&#160;Tg a &#8722;1 , but emission rates vary widely among plant species and are sensitive to meteorological and environmental conditions including temperature, sunlight, and soil moisture. Due to its high reactivity, isoprene has a large impact on air quality and climate pollutants such as ozone and aerosols. It is also an important sink for the hydroxyl radical which impacts the lifetime of the important greenhouse gas methane along with many other trace gas species. Modeling the impacts of isoprene emissions on atmospheric chemistry and climate requires accurate isoprene emission estimates. These can be obtained using the empirical Model of Emissions of Gases and Aerosols from Nature (MEGAN), but the parameterization of this model is uncertain due in part to limited field observations. In this study, we use ground&#8208;based measurements of isoprene concentrations and fluxes from 11 field sites to assess the variability of the isoprene emission temperature response across ecosystems. We then use these observations in a Metropolis&#8208;Hastings Markov Chain Monte Carlo (MHMCMC) data assimilation framework to optimize the MEGAN temperature response function. We find that the performance of MEGAN can be significantly improved at several high&#8208;latitude field sites by increasing the modeled sensitivity of isoprene emissions to past temperatures. At some sites, the optimized model was nearly four times more sensitive to temperature than the unoptimized model. This has implications for air quality modeling in a warming climate. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication <span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation