Publication Date:
2024-02-29
Description:
For the investigation of organic carbon fluxes reaching the seafloor, oxygen microprofiles were measured at 145 sites in different sub-regions of the Southern Ocean. At eleven sites, an in situ oxygen microprofiler was deployed for the measurement of oxygen profiles and the calculation of organic carbon fluxes. At four sites, both in situ and ex situ data were determined for high latitudes. Based on this dataset as well as on previous published data, a relationship was established for the estimation of fluxes derived by ex situ measured O2 profiles. The fluxes of labile organic matter range from 0.5 to 37.1 mgC m**2/day. The high values determined by in situ measurements were observed in the Polar Front region (water depth of more than 4290 m) and are comparable to organic matter fluxes observed for high-productivity, upwelling areas like off West Africa. The oxygen penetration depth, which reflects the long-term organic matter flux to the sediment, was correlated with assemblages of key diatom species. In the Scotia Sea (~3000 m water depth), oxygen penetration depths of less than 15 cm were observed, indicating high benthic organic carbon fluxes. In contrast, the oxic zone extends down to several decimeters in abyssal sediments of the Weddell Sea and the southeastern South Atlantic. The regional pattern of organic carbon fluxes derived from micro-sensor data suggest that episodic and seasonal sedimentation pulses are important for the carbon supply to the seafloor of the deep Southern Ocean.
Keywords:
Adelaide Island; Agulhas Basin; Amundsen Sea; Antarctic Peninsula; ANT-V/4; ANT-VI/2; ANT-VI/3; ANT-VIII/3; ANT-VIII/6; ANT-X/5; ANT-X/6; ANT-XI/3; ANT-XXI/4; ANT-XXIV/2; Anvers Island; Area/locality; Atka Bay; Atlantic Ridge; AWI_Paleo; B_LANDER; Barents Sea; BC; Bellingshausen Sea; Benthic Oxygen Lander System; Biological province; BOLAS; Bottom lander; Box corer; Bransfield Strait; Calculated; Camp Norway; Carbon, organic, flux; Comment; CTD/Rosette; CTD-RO; DATE/TIME; Depth, bathymetric; DEPTH, sediment/rock; Drake Passage; Eastern Weddell Sea, Southern Ocean; ECOFER; Event label; Factor; Filchner Shelf; Filchner Trough; Fram Strait; Gear; Giant box corer; GKG; Gravity corer (Kiel type); H1; H2; Halley Bay; Kapp Norvegia; KTB-06; KTB-11; KTB-13; KTB-16; KTB-19; KTB-23; KTB-26; KTB-28; KTB-33; Latitude of event; Lazarev Sea; Le Suroît; Longitude of event; Lyddan Island; M3; Marguerite Bay; MUC; MultiCorer; Oxygen, microelectrode; Oxygen penetration depth; Oxygen penetration depth, standard deviation; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS10; PS10/672; PS10/675; PS10/678; PS10/684; PS10/686; PS10/688; PS10/690; PS10/694; PS10/697; PS10/699; PS10/701; PS10/703; PS10/707; PS10/711; PS10/719; PS10/725; PS10/738; PS10/740; PS10/748; PS10/757; PS10/760; PS10/762; PS10/766; PS10/778; PS10/782; PS10/784; PS10/794; PS10/804; PS10/813; PS10/816; PS10/818; PS10/820; PS10/824; PS12; PS12/116; PS12/128; PS12/143; PS12/186; PS12/193; PS12/201; PS12/300; PS12/310; PS12/312; PS12/319; PS12/336; PS12/338; PS12/340; PS12/348; PS12/374; PS12/380; PS12/458; PS12/465; PS12/472; PS12/486; PS12/490; PS12/526; PS1472-1; PS1474-1; PS1475-1; PS1477-1; PS1478-1; PS1479-1; PS1480-2; PS1481-2; PS1482-2; PS1483-2; PS1484-2; PS1485-1; PS1486-2; PS1487-1; PS1488-2; PS1489-3; PS1490-2; PS1491-3; PS1492-1; PS1493-2; PS1494-3; PS1495-1; PS1496-2; PS1498-1; PS1499-2; PS1500-2; PS1501-1; PS1502-1; PS1505-1; PS1506-2; PS1507-2; PS1508-2; PS1509-2; PS1537-2; PS1543-1; PS1549-1; PS1555-2; PS1557-1; PS1565-3; PS1590-1; PS1595-2; PS1596-2; PS1599-2; PS16; PS16/267; PS16/281; PS16/294; PS16/306; PS16/311; PS16/321; PS16/337; PS16/342; PS16/362; PS16/515; PS16/516; PS16/540; PS16/549; PS16/559; PS1605-2; PS1606-2; PS1607-2; PS1611-4; PS1622-2; PS1625-2; PS1635-3; PS1636-2; PS1637-2; PS1638-2; PS1639-2; PS1645-2; PS1751-2; PS1755-7; PS1759-1; PS1765-1; PS1768-1; PS1772-6; PS1776-6; PS1777-7; PS1782-6; PS1811-1; PS1812-1; PS1823-5; PS1826-6; PS1832-4; PS22; PS22/712; PS22/714; PS22/721; PS22/769; PS22/773; PS22/776; PS22/786; PS22/788; PS22/790; PS22/791; PS22/797; PS22/802; PS22/803; PS22/804; PS22/805; PS22/810; PS22/812; PS22/813; PS22/814; PS22/815; PS22/816; PS22/860; PS22/872; PS22/876; PS22/891; PS22/899; PS22/902; PS22/917; PS22/941; PS22/947; PS22/973; PS22 06AQANTX_5; PS2257-1; PS2258-1; PS2262-1; PS2276-2; PS2278-5; PS2280-1; PS2288-1; PS2290-1; PS2292-1; PS2293-1; PS2299-1; PS2304-2; PS2305-1; PS2306-1; PS2307-2; PS2312-1; PS2314-1; PS2315-1; PS2316-1; PS2317-1; PS2318-1; PS2357-2; PS2361-1; PS2362-1; PS2365-1; PS2365-2; PS2366-1; PS2367-1; PS2370-4; PS2371-1; PS2372-1; PS2376-1; PS2376-4; PS2522-1; PS2527-1; PS2528-1; PS2537-1; PS2538-1; PS2539-2; PS2542-1; PS2543-3; PS2546-1; PS2547-2; PS2548-2; PS2550-1; PS2553-2; PS2556-1; PS29; PS29/010; PS29/021; PS29/022; PS29/045; PS29/046; PS29/047; PS29/050; PS29/051; PS29/062; PS29/063; PS29/064; PS29/066; PS29/070; PS29/075; PS65; PS65/594-3; PS65/596-2; PS65/598-1; PS65/600-1; PS65/600-2; PS65/701-2; PS65/703-1; PS65/703-2; PS65/705-1; PS71/013-12; PS71/013-2; PS71/017-12; PS71/033-19; PS71/039-10; PS71/039-4; PS71/047-1; PS71/084-1; PS71/085-1; PS71/085-5; PS71/090-2; PS71 ANDEEP-SYSTCO SCACE; Reference of data; S1; S2; S6; S7; S8; S9; Sample method; Scotia Sea, southwest Atlantic; Season; Shona Ridge; SL; South Atlantic Ocean; South Sandwich Basin; SPP1158; Total mass, flux per day; Uniform resource locator/link to reference; Vestkapp; Weddell Sea; Wegener Canyon
Type:
Dataset
Format:
text/tab-separated-values, 1489 data points
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