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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Main Authors: Simone, Michelle, Schulz, Kai, Oakes, Joanne, Eyre, Bradley D
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.930934
https://doi.org/10.1594/PANGAEA.930934
id ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.930934
record_format openpolar
spelling 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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