Seawater carbonate chemistry and estuarine dissolved organic carbon export
Relative to their surface area, estuaries make a disproportionately large contribution of dissolved organic carbon (DOC) to the global carbon cycle, but it is unknown how this will change under a future climate. As such, the response of DOC fluxes from microbially dominated unvegetated sediments to...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.930934 2023-05-15T17:51:42+02:00 Seawater carbonate chemistry and estuarine dissolved organic carbon export Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D LATITUDE: -29.403500 * LONGITUDE: 153.324000 2020-04-30 text/tab-separated-values, 2737 data points https://doi.pangaea.de/10.1594/PANGAEA.930934 https://doi.org/10.1594/PANGAEA.930934 en eng PANGAEA Simone, Michelle; Schulz, Kai Georg; Oakes, Joanne; Eyre, Bradley D (2021): Warming and ocean acidification may decrease estuarine dissolved organic carbon export to the ocean. Biogeosciences, 18(5), 1823-1838, https://doi.org/10.5194/bg-18-1823-2021 Simone, Michelle; Schulz, Kai; Oakes, Joanne; Eyre, Bradley D (2020): Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions. PANGAEA, https://doi.org/10.1594/PANGAEA.924460 Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James (2021): seacarb: seawater carbonate chemistry with R. R package version 3.2.16. https://cran.r-project.org/web/packages/seacarb/index.html https://doi.pangaea.de/10.1594/PANGAEA.930934 https://doi.org/10.1594/PANGAEA.930934 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY AIRICA analyzer (Miranda) Alkalinity total standard deviation Aragonite saturation state Benthos Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved flux organic Carbonate ion Carbonate system computation flag Carbon dioxide Clarence_River_estuary Coast and continental shelf Dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.930934 https://doi.org/10.5194/bg-18-1823-2021 https://doi.org/10.1594/PANGAEA.924460 2023-01-20T09:14:51Z Relative to their surface area, estuaries make a disproportionately large contribution of dissolved organic carbon (DOC) to the global carbon cycle, but it is unknown how this will change under a future climate. As such, the response of DOC fluxes from microbially dominated unvegetated sediments to individual and combined future climate stressors of temperature change (from delta −3 to delta +5 °C compared to ambient mean temperatures) and ocean acidification (OA, 2*current CO2 partial pressure, pCO2) was investigated ex situ. Warming alone increased sediment heterotrophy, resulting in a proportional increase in sediment DOC uptake; sediments became net sinks of DOC (3.5 to 8.8 mmol C/m**2/d) at warmer temperatures (delta +3 and delta +5 °C, respectively). This temperature response changed under OA conditions, with sediments becoming more autotrophic and a greater sink of DOC (up to 4* greater than under current pCO2 conditions). This response was attributed to the stimulation of heterotrophic bacteria with the autochthonous production of labile organic matter by microphytobenthos. Extrapolating these results to the global area of unvegetated subtidal estuarine sediments, we find that the future climate of warming (delta +3 °C) and OA may decrease estuarine export of DOC by ∼ 80 % (150 Tg C/yr) and have a disproportionately large impact on the global DOC budget. Dataset Ocean acidification PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(153.324000,153.324000,-29.403500,-29.403500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AIRICA analyzer (Miranda) Alkalinity total standard deviation Aragonite saturation state Benthos Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved flux organic Carbonate ion Carbonate system computation flag Carbon dioxide Clarence_River_estuary Coast and continental shelf |
spellingShingle |
AIRICA analyzer (Miranda) Alkalinity total standard deviation Aragonite saturation state Benthos Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved flux organic Carbonate ion Carbonate system computation flag Carbon dioxide Clarence_River_estuary Coast and continental shelf Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D Seawater carbonate chemistry and estuarine dissolved organic carbon export |
topic_facet |
AIRICA analyzer (Miranda) Alkalinity total standard deviation Aragonite saturation state Benthos Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved flux organic Carbonate ion Carbonate system computation flag Carbon dioxide Clarence_River_estuary Coast and continental shelf |
description |
Relative to their surface area, estuaries make a disproportionately large contribution of dissolved organic carbon (DOC) to the global carbon cycle, but it is unknown how this will change under a future climate. As such, the response of DOC fluxes from microbially dominated unvegetated sediments to individual and combined future climate stressors of temperature change (from delta −3 to delta +5 °C compared to ambient mean temperatures) and ocean acidification (OA, 2*current CO2 partial pressure, pCO2) was investigated ex situ. Warming alone increased sediment heterotrophy, resulting in a proportional increase in sediment DOC uptake; sediments became net sinks of DOC (3.5 to 8.8 mmol C/m**2/d) at warmer temperatures (delta +3 and delta +5 °C, respectively). This temperature response changed under OA conditions, with sediments becoming more autotrophic and a greater sink of DOC (up to 4* greater than under current pCO2 conditions). This response was attributed to the stimulation of heterotrophic bacteria with the autochthonous production of labile organic matter by microphytobenthos. Extrapolating these results to the global area of unvegetated subtidal estuarine sediments, we find that the future climate of warming (delta +3 °C) and OA may decrease estuarine export of DOC by ∼ 80 % (150 Tg C/yr) and have a disproportionately large impact on the global DOC budget. |
format |
Dataset |
author |
Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D |
author_facet |
Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D |
author_sort |
Simone, Michelle |
title |
Seawater carbonate chemistry and estuarine dissolved organic carbon export |
title_short |
Seawater carbonate chemistry and estuarine dissolved organic carbon export |
title_full |
Seawater carbonate chemistry and estuarine dissolved organic carbon export |
title_fullStr |
Seawater carbonate chemistry and estuarine dissolved organic carbon export |
title_full_unstemmed |
Seawater carbonate chemistry and estuarine dissolved organic carbon export |
title_sort |
seawater carbonate chemistry and estuarine dissolved organic carbon export |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.930934 https://doi.org/10.1594/PANGAEA.930934 |
op_coverage |
LATITUDE: -29.403500 * LONGITUDE: 153.324000 |
long_lat |
ENVELOPE(153.324000,153.324000,-29.403500,-29.403500) |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Simone, Michelle; Schulz, Kai Georg; Oakes, Joanne; Eyre, Bradley D (2021): Warming and ocean acidification may decrease estuarine dissolved organic carbon export to the ocean. Biogeosciences, 18(5), 1823-1838, https://doi.org/10.5194/bg-18-1823-2021 Simone, Michelle; Schulz, Kai; Oakes, Joanne; Eyre, Bradley D (2020): Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions. PANGAEA, https://doi.org/10.1594/PANGAEA.924460 Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James (2021): seacarb: seawater carbonate chemistry with R. R package version 3.2.16. https://cran.r-project.org/web/packages/seacarb/index.html https://doi.pangaea.de/10.1594/PANGAEA.930934 https://doi.org/10.1594/PANGAEA.930934 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.930934 https://doi.org/10.5194/bg-18-1823-2021 https://doi.org/10.1594/PANGAEA.924460 |
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1766158934107750400 |