Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMI
Biogenic volatile organic compounds (BVOCs), primarily emitted by terrestrial vegetation, are highly reactive and have large effects on the oxidizing potential of the troposphere, air quality and climate. In terms of global emissions, isoprene is the most important BVOC. Droughts bring about changes...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/9/2021 |
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| author | Beata Opacka Jean-François Müller Trissevgeni Stavrakou Diego G. Miralles Akash Koppa Brianna Rita Pagán Mark J. Potosnak Roger Seco Isabelle De Smedt Alex B. Guenther |
| author_facet | Beata Opacka Jean-François Müller Trissevgeni Stavrakou Diego G. Miralles Akash Koppa Brianna Rita Pagán Mark J. Potosnak Roger Seco Isabelle De Smedt Alex B. Guenther |
| author_sort | Beata Opacka |
| collection | DOAJ |
| description | Biogenic volatile organic compounds (BVOCs), primarily emitted by terrestrial vegetation, are highly reactive and have large effects on the oxidizing potential of the troposphere, air quality and climate. In terms of global emissions, isoprene is the most important BVOC. Droughts bring about changes in the surface emission of biogenic hydrocarbons mainly because plants suffer water stress. Past studies report that the current parameterization in the state-of-the-art Model of Emissions of Gases and Aerosols from Nature (MEGAN) v2.1, which is a function of the soil water content and the permanent wilting point, fails at representing the strong reduction in isoprene emissions observed in field measurements conducted during a severe drought. Since the current algorithm was originally developed based on potted plants, in this study, we update the parameterization in the light of recent ecosystem-scale measurements of isoprene conducted during natural droughts in the central U.S. at the Missouri Ozarks AmeriFlux (MOFLUX) site. The updated parameterization results in stronger reductions in isoprene emissions. Evaluation using satellite formaldehyde (HCHO), a proxy for BVOC emissions, and a chemical-transport model, shows that the adjusted parameterization provides a better agreement between the modelled and observed HCHO temporal variability at local and regional scales in 2011–2012, even if it worsens the model agreement in a global, long-term evaluation. We discuss the limitations of the current parameterization, a function of highly uncertain soil properties such as porosity. |
| first_indexed | 2024-03-10T03:45:53Z |
| format | Article |
| id | doaj.art-68837aab83044c7fa443dafbcd6ee5d9 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T03:45:53Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-68837aab83044c7fa443dafbcd6ee5d92023-11-23T09:09:25ZengMDPI AGRemote Sensing2072-42922022-04-01149202110.3390/rs14092021Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMIBeata Opacka0Jean-François Müller1Trissevgeni Stavrakou2Diego G. Miralles3Akash Koppa4Brianna Rita Pagán5Mark J. Potosnak6Roger Seco7Isabelle De Smedt8Alex B. Guenther9Royal Belgian Institute for Space Aeronomy (BISA), Avenue Circulaire 3, 1180 Brussels, BelgiumRoyal Belgian Institute for Space Aeronomy (BISA), Avenue Circulaire 3, 1180 Brussels, BelgiumRoyal Belgian Institute for Space Aeronomy (BISA), Avenue Circulaire 3, 1180 Brussels, BelgiumHydro-Climate Extremes Lab (H-CEL), Department of Environment, Ghent University, Coupure Links 653, 9000 Ghent, BelgiumHydro-Climate Extremes Lab (H-CEL), Department of Environment, Ghent University, Coupure Links 653, 9000 Ghent, BelgiumHydro-Climate Extremes Lab (H-CEL), Department of Environment, Ghent University, Coupure Links 653, 9000 Ghent, BelgiumEnvironmental Science and Studies, DePaul University, 1110 W Belden Ave., Chicago, IL 60614, USAInstitute of Environmental Assessment and Water Research (IDAEA-CSIC), Carrer Jordi Girona 18-26, 08034 Barcelona, SpainRoyal Belgian Institute for Space Aeronomy (BISA), Avenue Circulaire 3, 1180 Brussels, BelgiumDepartment of Earth System Science, University of California Irvine, 3216 Croul Hall, Irvine, CA 92697-3100, USABiogenic volatile organic compounds (BVOCs), primarily emitted by terrestrial vegetation, are highly reactive and have large effects on the oxidizing potential of the troposphere, air quality and climate. In terms of global emissions, isoprene is the most important BVOC. Droughts bring about changes in the surface emission of biogenic hydrocarbons mainly because plants suffer water stress. Past studies report that the current parameterization in the state-of-the-art Model of Emissions of Gases and Aerosols from Nature (MEGAN) v2.1, which is a function of the soil water content and the permanent wilting point, fails at representing the strong reduction in isoprene emissions observed in field measurements conducted during a severe drought. Since the current algorithm was originally developed based on potted plants, in this study, we update the parameterization in the light of recent ecosystem-scale measurements of isoprene conducted during natural droughts in the central U.S. at the Missouri Ozarks AmeriFlux (MOFLUX) site. The updated parameterization results in stronger reductions in isoprene emissions. Evaluation using satellite formaldehyde (HCHO), a proxy for BVOC emissions, and a chemical-transport model, shows that the adjusted parameterization provides a better agreement between the modelled and observed HCHO temporal variability at local and regional scales in 2011–2012, even if it worsens the model agreement in a global, long-term evaluation. We discuss the limitations of the current parameterization, a function of highly uncertain soil properties such as porosity.https://www.mdpi.com/2072-4292/14/9/2021BVOCsisopreneformaldehydedroughtOzarksMissouri |
| spellingShingle | Beata Opacka Jean-François Müller Trissevgeni Stavrakou Diego G. Miralles Akash Koppa Brianna Rita Pagán Mark J. Potosnak Roger Seco Isabelle De Smedt Alex B. Guenther Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMI Remote Sensing BVOCs isoprene formaldehyde drought Ozarks Missouri |
| title | Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMI |
| title_full | Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMI |
| title_fullStr | Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMI |
| title_full_unstemmed | Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMI |
| title_short | Impact of Drought on Isoprene Fluxes Assessed Using Field Data, Satellite-Based GLEAM Soil Moisture and HCHO Observations from OMI |
| title_sort | impact of drought on isoprene fluxes assessed using field data satellite based gleam soil moisture and hcho observations from omi |
| topic | BVOCs isoprene formaldehyde drought Ozarks Missouri |
| url | https://www.mdpi.com/2072-4292/14/9/2021 |
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