Toward Modeling Continental‐Scale Inland Water Carbon Dioxide Emissions
Abstract Inland waters emit significant amounts of carbon dioxide (CO2) to the atmosphere; however, the global magnitude and source distribution of inland water CO2 emissions remain uncertain. These fluxes have previously been “statistically upscaled” by independently estimating dissolved CO2 concen...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | AGU Advances |
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| Online Access: | https://doi.org/10.1029/2024AV001294 |
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| author | Brian Saccardi Craig B. Brinkerhoff Colin J. Gleason Matthew J. Winnick |
| author_facet | Brian Saccardi Craig B. Brinkerhoff Colin J. Gleason Matthew J. Winnick |
| author_sort | Brian Saccardi |
| collection | DOAJ |
| description | Abstract Inland waters emit significant amounts of carbon dioxide (CO2) to the atmosphere; however, the global magnitude and source distribution of inland water CO2 emissions remain uncertain. These fluxes have previously been “statistically upscaled” by independently estimating dissolved CO2 concentrations and gas exchange velocities to calculate fluxes. This scaling, while robust and defensible, has known limitations in representing carbon source limitations and spatial variability. Here, we develop and calibrate a CO2 transport model for the continental United States, simulating carbon transport and transformation in >22 million hydraulically connected rivers, lakes, and reservoirs. We estimate 25% lower CO2 fluxes compared to upscaling estimates forced by the same observational calibration data. While precise CO2 source distribution estimates are limited by the resolution of model parameterizations, our model suggests that stream corridor CO2 production dominates over groundwater inputs at the continental scale. Our results further suggest that the lack of observational networks for groundwater CO2 and scalable metabolic models of aquatic CO2 production remain the most salient barriers to further coupling of our model with other Earth system components. |
| format | Article |
| id | doaj-art-c7514fdb38fe4f978f843db02d3d0582 |
| institution | Kabale University |
| issn | 2576-604X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | AGU Advances |
| spelling | doaj-art-c7514fdb38fe4f978f843db02d3d05822024-12-24T08:34:27ZengWileyAGU Advances2576-604X2024-12-0156n/an/a10.1029/2024AV001294Toward Modeling Continental‐Scale Inland Water Carbon Dioxide EmissionsBrian Saccardi0Craig B. Brinkerhoff1Colin J. Gleason2Matthew J. Winnick3Department of Earth, Geographic, and Climate Sciences University of Massachusetts Amherst MA USADepartment of Civil & Environmental Engineering University of Massachusetts Amherst MA USADepartment of Civil & Environmental Engineering University of Massachusetts Amherst MA USADepartment of Earth, Geographic, and Climate Sciences University of Massachusetts Amherst MA USAAbstract Inland waters emit significant amounts of carbon dioxide (CO2) to the atmosphere; however, the global magnitude and source distribution of inland water CO2 emissions remain uncertain. These fluxes have previously been “statistically upscaled” by independently estimating dissolved CO2 concentrations and gas exchange velocities to calculate fluxes. This scaling, while robust and defensible, has known limitations in representing carbon source limitations and spatial variability. Here, we develop and calibrate a CO2 transport model for the continental United States, simulating carbon transport and transformation in >22 million hydraulically connected rivers, lakes, and reservoirs. We estimate 25% lower CO2 fluxes compared to upscaling estimates forced by the same observational calibration data. While precise CO2 source distribution estimates are limited by the resolution of model parameterizations, our model suggests that stream corridor CO2 production dominates over groundwater inputs at the continental scale. Our results further suggest that the lack of observational networks for groundwater CO2 and scalable metabolic models of aquatic CO2 production remain the most salient barriers to further coupling of our model with other Earth system components.https://doi.org/10.1029/2024AV001294inland water CO2 emissionsstream network modelcarbon fluxes |
| spellingShingle | Brian Saccardi Craig B. Brinkerhoff Colin J. Gleason Matthew J. Winnick Toward Modeling Continental‐Scale Inland Water Carbon Dioxide Emissions AGU Advances inland water CO2 emissions stream network model carbon fluxes |
| title | Toward Modeling Continental‐Scale Inland Water Carbon Dioxide Emissions |
| title_full | Toward Modeling Continental‐Scale Inland Water Carbon Dioxide Emissions |
| title_fullStr | Toward Modeling Continental‐Scale Inland Water Carbon Dioxide Emissions |
| title_full_unstemmed | Toward Modeling Continental‐Scale Inland Water Carbon Dioxide Emissions |
| title_short | Toward Modeling Continental‐Scale Inland Water Carbon Dioxide Emissions |
| title_sort | toward modeling continental scale inland water carbon dioxide emissions |
| topic | inland water CO2 emissions stream network model carbon fluxes |
| url | https://doi.org/10.1029/2024AV001294 |
| work_keys_str_mv | AT briansaccardi towardmodelingcontinentalscaleinlandwatercarbondioxideemissions AT craigbbrinkerhoff towardmodelingcontinentalscaleinlandwatercarbondioxideemissions AT colinjgleason towardmodelingcontinentalscaleinlandwatercarbondioxideemissions AT matthewjwinnick towardmodelingcontinentalscaleinlandwatercarbondioxideemissions |