Citation:

PANGAEA.930934

Name: Seawater carbonate chemistry and estuarine dissolved organic carbon export
Published: 2020
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Benthos; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Entire community; Laboratory experiment; Other studied parameter or process; Primary production/Photosynthesis; Respiration; Soft-bottom community; South Pacific; Temperate; Temperature

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

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.

Keyword(s):

Benthos; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Entire community; Laboratory experiment; Other studied parameter or process; Primary production/Photosynthesis; Respiration; Soft-bottom community; South Pacific; Temperate; Temperature

Supplement to:

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

Original version:

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

Further details:

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

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Latitude: -29.403500 * Longitude: 153.324000

Event(s):

Clarence_River_estuary * Latitude: -29.403500 * Longitude: 153.324000 * Method/Device: Experiment (EXP)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2021-04-30.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Simone, Michelle		study
2	Treatment	Treat		Simone, Michelle		Treatment 1
3	Treatment	Treat		Simone, Michelle		Treatment 2
4	Time point, descriptive	Time point		Simone, Michelle
5	Replicates	Repl	#	Simone, Michelle
6	DEPTH, sediment/rock	Depth sed	m	Simone, Michelle		Geocode
7	DEPTH, water	Depth water	m	Simone, Michelle		Geocode
8	Surface area	Surface	m²	Simone, Michelle		Of core
9	Volume	Vol	l	Simone, Michelle		Of water in the core
10	Time in minutes	Time	min	Simone, Michelle		Sampling time
11	Salinity	Sal		Simone, Michelle
12	Temperature, water	Temp	°C	Simone, Michelle
13	Oxygen saturation	O2 sat	mg/l	Simone, Michelle
14	Carbon, inorganic, dissolved	DIC	µmol/l	Simone, Michelle	AIRICA analyzer (Miranda)
15	Carbon, inorganic, dissolved	DIC	µmol/kg	Simone, Michelle
16	Carbon, organic, dissolved	DOC	µmol/l	Simone, Michelle
17	pH	pH		Simone, Michelle	Potentiometric	free scale
18	Respiration rate, oxygen	Resp O2	mmol/m²/h	Simone, Michelle		Actual
19	Respiration rate, oxygen, standard deviation	Resp O2 std dev	±	Simone, Michelle		Actual
20	Respiration rate, oxygen	Resp O2	mmol/m²/h	Simone, Michelle		Scaled
21	Respiration rate, oxygen, standard deviation	Resp O2 std dev	±	Simone, Michelle		Scaled
22	Net primary production of oxygen	NPP O2	mmol/m²/h	Simone, Michelle		Actual
23	Net primary production of oxygen, standard deviation	NPP O2 std dev	±	Simone, Michelle		Actual
24	Net primary production of oxygen	NPP O2	mmol/m²/h	Simone, Michelle		Scaled
25	Net primary production of oxygen, standard deviation	NPP O2 std dev	±	Simone, Michelle		Scaled
26	Gross primary production of oxygen	GPP O2	mmol/m²/h	Simone, Michelle
27	Gross primary production of oxygen, standard deviation	GPP O2 std dev	±	Simone, Michelle
28	Production/respiration ratio	P/resp		Simone, Michelle
29	Production/respiration ratio, standard deviation	P/R std dev	±	Simone, Michelle
30	Carbon, inorganic, dissolved, flux	DIC flux	mmol/m²/h	Simone, Michelle		Dark
31	Carbon, inorganic, dissolved, flux, standard deviation	DIC flux std dev	±	Simone, Michelle		Dark
32	Carbon, inorganic, dissolved, flux	DIC flux	mmol/m²/h	Simone, Michelle		Light
33	Carbon, inorganic, dissolved, flux, standard deviation	DIC flux std dev	±	Simone, Michelle		Light
34	Carbon, organic, dissolved, flux	DOC flux	µmol/m²/h	Simone, Michelle		Dark
35	Carbon, organic, dissolved, flux, standard deviation	DOC flux std dev	±	Simone, Michelle		Dark
36	Carbon, organic, dissolved, flux	DOC flux	µmol/m²/h	Simone, Michelle		Light
37	Carbon, organic, dissolved, flux, standard deviation	DOC flux std dev	±	Simone, Michelle		Light
38	Nitrogen, inorganic, dissolved	DIN	µmol/l	Simone, Michelle		Start
39	Nitrogen, inorganic, dissolved, standard deviation	DIN std dev	±	Simone, Michelle		End
40	Nitrogen, inorganic, dissolved	DIN	µmol/l	Simone, Michelle		Start
41	Nitrogen, inorganic, dissolved, standard deviation	DIN std dev	±	Simone, Michelle		End
42	Salinity	Sal		Simone, Michelle
43	Temperature, water	Temp	°C	Simone, Michelle
44	Temperature, water, standard deviation	Temp std dev	±	Simone, Michelle
45	pH	pH		Simone, Michelle	Potentiometric	free scale
46	pH, standard deviation	pH std dev	±	Simone, Michelle	Potentiometric	free scale
47	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Simone, Michelle	Calculated using CO2SYS
48	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Simone, Michelle	Calculated using CO2SYS
49	Bicarbonate ion	[HCO3]-	µmol/kg	Simone, Michelle	Calculated using CO2SYS
50	Bicarbonate ion, standard deviation	[HCO3]- std dev	±	Simone, Michelle	Calculated using CO2SYS
51	Carbonate ion	[CO3]2-	µmol/kg	Simone, Michelle	Calculated using CO2SYS
52	Carbonate ion, standard deviation	[CO3]2- std dev	±	Simone, Michelle	Calculated using CO2SYS
53	Alkalinity, total	AT	µmol/kg	Simone, Michelle	Calculated using CO2SYS
54	Alkalinity, total, standard deviation	AT std dev	±	Simone, Michelle	Calculated using CO2SYS
55	Carbon, inorganic, dissolved	DIC	µmol/kg	Simone, Michelle	AIRICA analyzer (Miranda)
56	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Simone, Michelle	AIRICA analyzer (Miranda)
57	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
58	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
59	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
60	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
61	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
62	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
63	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
64	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
65	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
66	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2737 data points

Download Data

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML (shows only first 2000 rows)