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Southern Ocean CO2 uptake and buffer factor from model run 2012-2100, with links to model results (2015)

Hauck, Judith ; Völker, Christoph

PANGAEA

In: Supplement to: Hauck, Judith; Völker, Christoph (2015): Rising atmospheric CO2 leads to large impact of biology on Southern Ocean CO2 uptake via changes of the Revelle factor. Geophysical Research Letters, 42(5), 1459-1464, https://doi.org/10.1002/2015GL063070

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Publikationsdatum: 2023-01-13

Beschreibung: The Southern Ocean is a key region for global carbon uptake and is characterised by a strong seasonality with the annual CO2 uptake being mediated by biological carbon draw-down in summer. Here, we show that the contribution of biology to CO2 uptake will become even more important until 2100. This is the case even if biological production remains unaltered and can be explained by the decreasing buffer capacity of the ocean as its carbon content increases. The same amount of biological carbon draw-down leads to a more than twice as large reduction in CO2 (aq) concentration and hence to a larger CO2 gradient between ocean and atmosphere that drives the gas-exchange. While the winter uptake south of 44°S changes little, the summer uptake increases largely and is responsible for the annual mean response. The combination of decreasing buffer capacity and strong seasonality of biological carbon draw-down introduces a strong and increasing seasonality in the anthropogenic carbon uptake.

Schlagwort(e): File content; Uniform resource locator/link to file; Uniform resource locator/link to image

Materialart: Dataset

Format: text/tab-separated-values, 15 data points

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On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material (2015)

Hauck, Judith ; Völker, Christoph ; Wolf-Gladrow, Dieter A ; [weitere]

PANGAEA

In: Supplement to: Hauck, Judith; Völker, Christoph; Wolf-Gladrow, Dieter A; Laufkötter, Charlotte; Vogt, Meike; Aumont, Olivier; Bopp, Laurent; Buitenhuis, Erik Theodoor; Doney, Scott C; Dunne, John; Gruber, Nicolas; Hashioka, Taketo; John, Jasmin; Le Quéré, Corinne; Lima, Ivan D; Nakano, Hideyuki; Séférian, Roland; Totterdell, Ian J (2015): On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century. Global Biogeochemical Cycles, 29(9), 1451-1470, https://doi.org/10.1002/2015GB005140

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Publikationsdatum: 2023-01-13

Beschreibung: We use a suite of eight ocean biogeochemical/ecological general circulation models from the MAREMIP and CMIP5 archives to explore the relative roles of changes in winds (positive trend of Southern Annular Mode, SAM) and in warming- and freshening-driven trends of upper ocean stratification in altering export production and CO2 uptake in the Southern Ocean at the end of the 21st century. The investigated models simulate a broad range of responses to climate change, with no agreement ona dominance of either the SAM or the warming signal south of 44° S. In the southernmost zone, i.e., south of 58° S, they concur on an increase of biological export production, while between 44 and 58° S the models lack consensus on the sign of change in export. Yet, in both regions, the models show an enhanced CO2 uptake during spring and summer. This is due to a larger CO 2 (aq) drawdown by the same amount of summer export production at a higher Revelle factor at the end of the 21st century. This strongly increases the importance of the biological carbon pump in the entire Southern Ocean. In the temperate zone, between 30 and 44° S all models show a predominance of the warming signal and a nutrient-driven reduction of export production. As a consequence, the share of the regions south of 44° S to the total uptake of the Southern Ocean south of 30° S is projected to increase at the end of the 21st century from 47 to 66% with a commensurable decrease to the north. Despite this major reorganization of the meridional distribution of the major regions of uptake, the total uptake increases largely in line with the rising atmospheric CO2. Simulations with the MITgcm-REcoM2 model show that this is mostly driven by the strong increase of atmospheric CO2, with the climate-driven changes of natural CO2 exchange offsetting that trend only to a limited degree (~10%) and with negligible impact of climate effects on anthropogenic CO2 uptake when integrated over a full annual cycle south of 30° S.

Schlagwort(e): File content; Uniform resource locator/link to file; Uniform resource locator/link to image

Materialart: Dataset

Format: text/tab-separated-values, 27 data points

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Age model of sample CC8 from Corchia Cave speleothems (2020)

Bajo, Petra ; Drysdale, Russell N ; Woodhead, Jon D ; [weitere]

PANGAEA

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Publikationsdatum: 2024-02-26

Schlagwort(e): Age, maximum/old; Age, minimum/young; Age model; Apuan Alps, Italy; Corchia_Cave; DEPTH, sediment/rock; geochronology; glacial terminations; Palaeoceanography; palaeoclimatology; Speleothems; Speleothem sample; SPS; Stable isotopes

Materialart: Dataset

Format: text/tab-separated-values, 3720 data points

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Age model of sample CC122 from Corchia Cave speleothems (2020)

Bajo, Petra ; Drysdale, Russell N ; Woodhead, Jon D ; [weitere]

PANGAEA

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Publikationsdatum: 2024-02-26

Schlagwort(e): Age, maximum/old; Age, minimum/young; Age model; Apuan Alps, Italy; Corchia_Cave; DEPTH, sediment/rock; geochronology; glacial terminations; Palaeoceanography; palaeoclimatology; Speleothems; Speleothem sample; SPS; Stable isotopes

Materialart: Dataset

Format: text/tab-separated-values, 1500 data points

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Age model of sample CC30 from Corchia Cave speleothems (2020)

Bajo, Petra ; Drysdale, Russell N ; Woodhead, Jon D ; [weitere]

PANGAEA

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Publikationsdatum: 2024-02-26

Schlagwort(e): Age, maximum/old; Age, minimum/young; Age model; Apuan Alps, Italy; Corchia_Cave; DEPTH, sediment/rock; geochronology; glacial terminations; Palaeoceanography; palaeoclimatology; Speleothems; Speleothem sample; SPS; Stable isotopes

Materialart: Dataset

Format: text/tab-separated-values, 1500 data points

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6

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Age model of sample CC119 from Corchia Cave speleothems (2020)

Bajo, Petra ; Drysdale, Russell N ; Woodhead, Jon D ; [weitere]

PANGAEA

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Publikationsdatum: 2024-02-26

Schlagwort(e): Age, maximum/old; Age, minimum/young; Age model; Apuan Alps, Italy; Corchia_Cave; DEPTH, sediment/rock; geochronology; glacial terminations; Palaeoceanography; palaeoclimatology; Speleothems; Speleothem sample; SPS; Stable isotopes

Materialart: Dataset

Format: text/tab-separated-values, 1500 data points

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7

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Stack Age model from Corchia Cave speleothems (2020)

Bajo, Petra ; Drysdale, Russell N ; Woodhead, Jon D ; [weitere]

PANGAEA

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Publikationsdatum: 2024-02-26

Schlagwort(e): Age, maximum/old; Age, minimum/young; Age model; Apuan Alps, Italy; Corchia_Cave; DEPTH, sediment/rock; geochronology; glacial terminations; Palaeoceanography; palaeoclimatology; Speleothems; Speleothem sample; SPS; Stable isotopes

Materialart: Dataset

Format: text/tab-separated-values, 1500 data points

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8

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Age-depth model of sediment core GeoB16206-1 and associated dating uncertainty (2019)

Waelbroeck, Claire ; Lougheed, Bryan C ; Vázquez Riveiros, Natalia ; [weitere]

PANGAEA

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Publikationsdatum: 2024-06-25

Schlagwort(e): 057-1; Age, maximum/old; Age, minimum/young; Age model; AMADEUS; Continental Slope Northeast Brazil; DEPTH, sediment/rock; GeoB16206-1; Gravity corer (Kiel type); Maria S. Merian; MSM20/3; SL

Materialart: Dataset

Format: text/tab-separated-values, 3980 data points

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9

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Lithogenic thorium fluxes into South Atlantic surface sediments (2023)

van der Does, Michèlle ; Lamy, Frank ; Krätschmer, Stephan ; [weitere]

PANGAEA

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Publikationsdatum: 2024-07-01

Beschreibung: We present the characteristics of the lithogenic components of seafloor surface sediments covering the entire South Atlantic Ocean (from the equator to Antarctica). These samples were collected by multiple seagoing expeditions between 1988 and 2005. This dataset describes the 230-Thorium-normalized fluxes of 232-Thorium, and the calculated specific fluxes for the four end-members that were obtained for the grain-size distributions (as presented in doi:10.1594/PANGAEA.961711). In addition, we present dust fluxes from model simulations at the same stations as the direct observations.

Schlagwort(e): 06MT15_2; 06MT41_3; Agulhas Basin; Agulhas Ridge; Amundsen Sea; Angola Basin; ANT-IX/3; ANT-IX/4; ANT-VIII/3; ANT-X/5; ANT-X/6; ANT-XI/2; ANT-XI/4; ANT-XVII/4; ANT-XX/2; ANT-XXII/4; Argentine Basin; Ascencion Island; Atlantic Ridge; Brazil Basin; Calculated; Cape Basin; Central South Atlantic; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discovery Seamount; dust; Dust, aeolian, flux; Dust flux; Eastern Rio Grande Rise; ELEVATION; End member, flux; end-member modelling; Equatorial Atlantic; Event label; GeoB1035-2; GeoB1117-3; GeoB1306-1; GeoB1308-1; GeoB1314-2; GeoB1401-2; GeoB1404-8; GeoB1407-8; GeoB1412-2; GeoB1724-2; GeoB1729-2; GeoB2018-1; GeoB2019-2; GeoB2021-4; GeoB2022-3; GeoB2116-2; GeoB2117-4; GeoB2814-3; GeoB2824-1; GeoB3803-1; GeoB3806-2; GeoB3808-7; GeoB5002-1; GeoB5004-2; GeoB5007-1; GeoB5008-3; GeoB5112-5; GeoB5115-2; GeoB5121-2; GeoB5132-2; GeoB5135-1; GeoB5137-1; GeoB5139-1; GeoB5142-2; GeoB6112-1; GeoB6402-9; GeoB6404-3; GeoB6407-2; GeoB6409-3; GeoB6411-4; GeoB6417-2; GeoB6426-2; GeoB7001-5; GeoB7002-1; GeoB7003-2; Giant box corer; GKG; grain size distribution; Gravity corer (Kiel type); Guinea Basin; Hunter Channel; ICP-MS, Thermo Fisher Scientific, Element 2; Indian Ocean; IRD; Islas Orcadas; Kongo delta; LATITUDE; Lazarev Sea; Lithogenic, flux; Lithogenic, flux, standard deviation; LONGITUDE; M15/2; M16/1; M20/2; M23/1; M23/2; M29/2; M34/3; M41/2; M41/3; M46/1; M46/4; M49/4; M6/6; M9/4; Meteor (1986); Meteor Rise; Mid Atlantic Ridge; Mid-Atlantic Ridge; MSN; MUC; MultiCorer; Multiple opening/closing net; Namibia continental slope; Northern Brasil Basin; Particle size distribution; PLA; Plankton net; Polarstern; PS16; PS16/321; PS16/342; PS16/354; PS1772-6; PS1777-7; PS1780-1; PS18; PS18/184; PS18/185; PS18/186; PS18/187; PS18/196; PS18/198; PS18/199; PS18/200; PS18/203; PS18/204; PS18/229; PS18/237; PS18/238; PS18/239; PS18/241; PS18/243; PS18/251; PS18/252; PS18/253; PS18/254; PS18/255; PS18/264; PS18/267; PS18/269; PS2037-2; PS2038-3; PS2039-2; PS2040-1; PS2049-3; PS2050-2; PS2051-2; PS2052-3; PS2055-3; PS2056-2; PS2073-1; PS2081-1; PS2082-3; PS2083-1; PS2084-2; PS2086-2; PS2093-1; PS2094-1; PS2095-1; PS2096-1; PS2097-1; PS2106-1; PS2109-3; PS2110-1; PS22; PS22/679; PS22/690; PS22/712; PS22/744; PS22/751; PS22/773; PS22/783; PS22/788; PS22/805; PS22/813; PS22/818; PS22/834; PS22/902; PS22/917; PS22/947; PS22/956; PS22 06AQANTX_5; PS2251-1; PS2254-1; PS2257-1; PS2268-6; PS2271-1; PS2278-5; PS2285-3; PS2290-1; PS2307-2; PS2315-1; PS2320-2; PS2335-3; PS2367-2; PS2370-5; PS2372-3; PS2374-2; PS2489-4; PS2491-4; PS2496-2; PS2509-1; PS2515-2; PS2518-2; PS2557-2; PS2561-1; PS2577-2; PS2587-1; PS28; PS28/256; PS28/264; PS28/298; PS28/352; PS28/378; PS28/395; PS30; PS30/004; PS30/030; PS30/113; PS30/126; PS56; PS56/206-2; PS56/207-1; PS56/210-2; PS63/027-2; PS63/038-2; PS63/041-2; PS63/049-2; PS63/054-5; PS63/076-2; PS63/082-2; PS63/095-3; PS63/105-1; PS63/106-2; PS63/109-1; PS63/111-1; PS63/112-4; PS63/113-1; PS63/114-2; PS63/117-1; PS63/118-2; PS63/120-3; PS63/123-3; PS63/126-3; PS63/136-2; PS63/141-2; PS63 06AQ200211_2; PS67; PS67/185-1; PS67/197-4; PS67/205-4; PS67/206-3; PS67/224-3; Riiser-Larsen Sea; Santos Plateau; Scotia Sea, southwest Atlantic; Simulated; SL; South Atlantic; South Atlantic Ocean; Southwest Guinea Basin; thorium normalization; Walvis Ridge; Weddell Sea; West Angola Basin

Materialart: Dataset

Format: text/tab-separated-values, 1246 data points

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