Increased carbon capture by a silicate-treated forested watershed affected by acid deposition
Meeting internationally agreed-upon climate targets requires carbon dioxide removal (CDR) strategies coupled with an urgent phase-down of fossil fuel emissions. However, the efficacy and wider impacts of CDR are poorly understood. Enhanced rock weathering (ERW) is a land-based CDR strategy requiring...
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ftcopernicus:oai:publications.copernicus.org:bg87312 2023-05-15T15:52:40+02:00 Increased carbon capture by a silicate-treated forested watershed affected by acid deposition Taylor, Lyla L. Driscoll, Charles T. Groffman, Peter M. Rau, Greg H. Blum, Joel D. Beerling, David J. 2021-01-12 application/pdf https://doi.org/10.5194/bg-18-169-2021 https://bg.copernicus.org/articles/18/169/2021/ eng eng doi:10.5194/bg-18-169-2021 https://bg.copernicus.org/articles/18/169/2021/ eISSN: 1726-4189 Text 2021 ftcopernicus https://doi.org/10.5194/bg-18-169-2021 2021-01-18T17:22:15Z Meeting internationally agreed-upon climate targets requires carbon dioxide removal (CDR) strategies coupled with an urgent phase-down of fossil fuel emissions. However, the efficacy and wider impacts of CDR are poorly understood. Enhanced rock weathering (ERW) is a land-based CDR strategy requiring large-scale field trials. Here we show that a low 3.44 t ha −1 wollastonite treatment in an 11.8 ha acid-rain-impacted forested watershed in New Hampshire, USA, led to cumulative carbon capture by carbonic acid weathering of 0.025–0.13 t CO 2 ha −1 over 15 years. Despite a 0.8–2.4 t CO 2 ha −1 logistical carbon penalty from mining, grinding, transportation, and spreading, by 2015 weathering together with increased forest productivity led to net CDR of 8.5–11.5 t CO 2 ha −1 . Our results demonstrate that ERW may be an effective, scalable CDR strategy for acid-impacted forests but at large scales requires sustainable sources of silicate rock dust. Text Carbonic acid Copernicus Publications: E-Journals Biogeosciences 18 1 169 188 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Meeting internationally agreed-upon climate targets requires carbon dioxide removal (CDR) strategies coupled with an urgent phase-down of fossil fuel emissions. However, the efficacy and wider impacts of CDR are poorly understood. Enhanced rock weathering (ERW) is a land-based CDR strategy requiring large-scale field trials. Here we show that a low 3.44 t ha −1 wollastonite treatment in an 11.8 ha acid-rain-impacted forested watershed in New Hampshire, USA, led to cumulative carbon capture by carbonic acid weathering of 0.025–0.13 t CO 2 ha −1 over 15 years. Despite a 0.8–2.4 t CO 2 ha −1 logistical carbon penalty from mining, grinding, transportation, and spreading, by 2015 weathering together with increased forest productivity led to net CDR of 8.5–11.5 t CO 2 ha −1 . Our results demonstrate that ERW may be an effective, scalable CDR strategy for acid-impacted forests but at large scales requires sustainable sources of silicate rock dust. |
format |
Text |
author |
Taylor, Lyla L. Driscoll, Charles T. Groffman, Peter M. Rau, Greg H. Blum, Joel D. Beerling, David J. |
spellingShingle |
Taylor, Lyla L. Driscoll, Charles T. Groffman, Peter M. Rau, Greg H. Blum, Joel D. Beerling, David J. Increased carbon capture by a silicate-treated forested watershed affected by acid deposition |
author_facet |
Taylor, Lyla L. Driscoll, Charles T. Groffman, Peter M. Rau, Greg H. Blum, Joel D. Beerling, David J. |
author_sort |
Taylor, Lyla L. |
title |
Increased carbon capture by a silicate-treated forested watershed affected by acid deposition |
title_short |
Increased carbon capture by a silicate-treated forested watershed affected by acid deposition |
title_full |
Increased carbon capture by a silicate-treated forested watershed affected by acid deposition |
title_fullStr |
Increased carbon capture by a silicate-treated forested watershed affected by acid deposition |
title_full_unstemmed |
Increased carbon capture by a silicate-treated forested watershed affected by acid deposition |
title_sort |
increased carbon capture by a silicate-treated forested watershed affected by acid deposition |
publishDate |
2021 |
url |
https://doi.org/10.5194/bg-18-169-2021 https://bg.copernicus.org/articles/18/169/2021/ |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-18-169-2021 https://bg.copernicus.org/articles/18/169/2021/ |
op_doi |
https://doi.org/10.5194/bg-18-169-2021 |
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Biogeosciences |
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18 |
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1 |
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169 |
op_container_end_page |
188 |
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1766387779449651200 |