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  • 2010-2014  (10)
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Keywords
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Year
  • 1
    facet.materialart.
    Unknown
    Annual SST, salinity, phosphate, nitrate, silicate and chlorophyll values from surface waters (2014)
    PANGAEA
    Details
    Publication Date: 2023-06-19
    Keywords: Area/locality; Chlorophyll a; DEPTH, water; interpolated; LATITUDE; LONGITUDE; Mixed layer depth; Nitrate; Phosphate; Salinity, interpolated; Silicate; Station label; Temperature, water, interpolated
    Type: Dataset
    Format: text/tab-separated-values, 27935 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Long chain 1,13- and 1,15-diols in surface sediments ans SST reconstruction for sediment core GeoB6518-1 (2012)
    PANGAEA
    In:  Supplement to: Rampen, Sebastiaan W; Willmott, Verónica; Kim, Jung-Hyun; Uliana, Eleonora; Mollenhauer, Gesine; Schefuß, Enno; Sinninghe Damsté, Jaap S; Schouten, Stefan (2012): Long chain 1,13- and 1,15-diols as a potential proxy for palaeotemperature reconstruction. Geochimica et Cosmochimica Acta, 84, 204-216, https://doi.org/10.1016/j.gca.2012.01.024
    Details
    Publication Date: 2023-12-12
    Description: Although commonly reported in marine and freshwater environments, little is known about the biological sources of long chain alkyl 1,13- and 1,15-diols, and factors controlling their distributions. Here we analyzed the occurrence and distribution of these lipids in a comprehensive set of marine surface sediments and compare their distributions with environmental conditions like sea surface temperature (SST), salinity and nutrient concentrations. Fractional abundances of the C28 1,13-, C30 1,13- and C30 1,15-diols show a strong correlation with SST and based on these results, we propose the Long chain Diol Index (LDI), which expresses the C30 1,15-diol abundance relative to those of C28 1,13-, C30 1,13- and C30 1,15-diols. The LDI shows a strong linear correlation with SST (LDI = 0.033 × SST + 0.095; R2 = 0.969, n = 162) over a temperature range of -3 to 27 °C. Long chain diol distributions in sediments from the South Atlantic close to the Congo River outflow (West Africa) provided a 43 kyr LDI SST record. This record reflects several known climatic events and shows similarities with an alkenone-derived SST record obtained using the same suite of sediments, both in trend and in terms of absolute SST. This confirms the potential of the LDI as a proxy for palaeo-SST reconstruction.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Evaluation of long chain 1,14-alkyl diols in marine sediments as indicators for upwelling and temperature (2014)
    PANGAEA
    In:  Supplement to: Rampen, Sebastiaan W; Willmott, Verónica; Kim, Jung-Hyun; Rodrigo-Gámiz, Marta; Uliana, Eleonora; Mollenhauer, Gesine; Schefuß, Enno; Sinninghe Damsté, Jaap S; Schouten, Stefan (2014): Evaluation of long chain 1,14-alkyl diols in marine sediments as indicators for upwelling and temperature. Organic Geochemistry, 76, 39-47, https://doi.org/10.1016/j.orggeochem.2014.07.012
    Details
    Publication Date: 2023-12-12
    Description: Long chain alkyl diols form a group of lipids occurring widely in marine environments. Recent studies have suggested several palaeoclimatological applications for proxies based on their distributions, but also revealed uncertainties about their applicability. Here we evaluate the use of long chain 1,14-alkyl diol indices for reconstruction of temperature and upwelling conditions by comparing index values, obtained from a comprehensive set of marine surface sediments, with environmental factors like sea surface temperature (SST), salinity and nutrient concentrations. Previous cultivation efforts indicated a strong effect of temperature on the degree of saturation and the chain length distribution of long chain 1,14-alkyl diols in Proboscia spp., quantified in the diol saturation index (DSI) and diol chain length index (DCI), respectively. However, values of these indices in surface sediments show no relationship with annual mean SST of the overlying water. It remains unknown what determines the DSI, although our data suggests that it may be affected by diagenesis, while the relationship between temperature and DCI may be different for different Proboscia species. In addition, contributions of algae other than Proboscia diatoms may affect both indices, although our data provide no direct evidence for additional long chain 1,14-alkyl diol sources. Two other indices using the abundance of 1,14-diols vs. 1,13-diols and C30 1,15-diols have previously been applied as indicators for upwelling intensity at different locations. The geographical distribution of their values supports the use of 1,14 diols vs. 1,13 diols [C28 + C30 1,14-diols]/[(C28 + C30 1,13-diols) + (C28 + C30 1,14-diols)] as a general indicator for high nutrient or upwelling conditions.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Unknown
    (Table A1) Long chain diol distributions in surface sediments (2012)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 286; 288; 291; 293; 295; 297; 298; 300; 301; 305; 306; 307; 309; 310; 311; 313; 314; 316; 317; 318; 319; 320; 321; 322; 323; 324; 325; 326; 327; 328; 329; 330; 332; 407-3; 412-2; 416-2; 420-2; 422-2; 423-3; 424-3; 426-3; 430-4; 435-1; 438-2; AMR-1MC; AMR-2; Amundsen Sea; Arabian Sea; Arctic Ocean; AT_II-107_19; AT_II-107_22; AT_II-107_28; AT_II-107_9; ATII_USA; Atlantis II (1963); AUSCAN; Baltic Sea; Barents Sea; BC; Bottom grab (Smith-McIntyre); Box corer; Brazil Basin; bs-6_baltic-proper; BS625; BS627; BS629; BS631; BS633; BS635; BS639; BS645; BS647; BS651; BS653; BS655; BS659; BS661; BS667; BS669; BS673; BS690; CALYPSO; Calypso Corer; Cape Blanc; Central South Atlantic; Comment; Congo Fan; DEPTH, sediment/rock; DNT05-22; Drake Passage; Event label; GC; GeoB10032-1; GeoB10034-3; GeoB10038-3; GeoB13601-3; GeoB13604-2; GeoB13606-2; GeoB13609-2; GeoB13610-2; GeoB13611-3; GeoB13612-3; GeoB13613-3; GeoB13615-4; GeoB13616-6; GeoB13618-2; GeoB1501-1; GeoB1503-2; GeoB2022-3; GeoB2102-1; GeoB2104-1; GeoB2105-3; GeoB2108-1; GeoB2111-2; GeoB2125-2; GeoB2130-1; GeoB2205-4; GeoB2208-1; GeoB2215-8; GeoB2216-2; GeoB2705-7; GeoB2712-1; GeoB2714-5; GeoB2715-1; GeoB2727-1; GeoB2730-1; GeoB2731-1; GeoB2734-2; GeoB2802-2; GeoB2803-2; GeoB2810-2; GeoB2829-1; GeoB6411-4; GeoB6412-1; GeoB6422-5; GeoB6424-1; GeoB6518-1; GeoB7926-2; GeoB8301-5; GeoB8318-1; GeoB8331-2; GeoB9501-4; GeoB9503-3; GeoB9506-3; GeoB9508-4; GeoB9510-3; GeoB9512-4; GeoB9513-5; GeoB9515-2; GeoB9516-4; GeoB9520-4; GeoB9521-3; GeoB9522-2; GeoB9524-3; GeoB9525-5; GeoB9526-4; GeoB9528-1; GeoB9529-1; GeoB9531-2; GeoB9532-1; GeoB9533-3; GeoB9534-4; GeoB9535-5; GeoB9536-4; GeoB9537-4; GeoB9538-5; GeoB9539-1; GeoB9540-1; GeoB9541-1; GeoB9542-1; GeoB9543-1; GeoB9544-1; GeoB9545-1; GeoB9547-2; Giant box corer; GKG; Gravity corer; Gravity corer (Kiel type); Gulf of St. Lawrence; Gullmarsfjord; HB5; HB6; HON02-15; Hudson Bay; IMAGES X - CADO; Indian Ocean; KAL; Kasten corer; LA07/9; Lance; Latitude of event; LMG04-04-KC16; LMG04-04-KC3; LMG05-02KC25; LMG98-02-KC6; Long chain diol, C28 1,13-diol, fractional abundance; Long chain diol, C30 1,13-diol, fractional abundance; Long chain diol, C30 1,15-diol, fractional abundance; Long chain diol, C32 1,15-diol, fractional abundance; Longitude of event; M16/2; M2003-1; M2003-8; M23/1; M23/2; M23/3; M29/1; M29/2; M46/4; M47/3; M53/1; M57/1; M65/1; Maria S. Merian; Marion Dufresne (1995); Mauritania Canyon; MD032603; MD03-2603; MD032604G; MD03-2604G; MD032607; MD03-2607; MD130; MD131; Meteor (1986); Method comment; MS-1; MS-3; MS-4; MSM11/2; MUC; MultiCorer; Nathaniel B. Palmer; NBP00-03-KC1; NBP00-03-KC28; NBP00-03-KC29; NBP00-03-KC30; NBP01-07-KC17; NBP01-07-KC28; NBP01-07-KC49; NBP06-03-3KC; NBP0702; NBP0702_SMG10; NBP0702_SMG13; NBP0702_SMG15; NBP0702_SMG17; NBP0702_SMG20; NBP0702_SMG22; NBP0702_SMG3; NBP95-07-KC2; NBP9903; NBP9903_KC20; NBP9903_KC21; NIOZ89; Northern Mauretania, Cape Timiris; Northern Senegal; North Greenland Sea; North-West African margin; Norwegian Sea; NP-07-13-08; NP-07-13-11; NP-07-13-13; NP-07-13-14; NP-07-13-16; NP-07-13-21; NP-07-13-23; NP-07-13-24; NP-07-13-25; NP-07-13-30; NP-07-13-31; NP-07-13-32; NP-07-13-33; NP-07-13-35; NP-07-13-40; NP-07-13-41; NP-07-13-42; NP-07-13-47; NP-07-13-49; NP-07-13-50; NP-07-13-51; NP-07-13-52; NP-07-13-60; NP-07-13-64; NP-07-13-9; PABESIA; PC; PD90-7-SMG21; PD90-7-SMG6; PD90-7-SMG8; PD90-7-SMG9; Piston corer; Ross Sea; Santos Plateau; Scotia Sea; Senegal Mudbelt; sept01-07; Skagerrak; SL; Slope off Argentina; SMG; SO184/1; Sonne; South Atlantic Ocean; Southeast Atlantic; Southern Ocean; Southern Senegal; South Pacific Ocean; ST_32; ST_34; ST_35; ST_45; Stat_BS-3; Station_A; Station_B; T89-10; T89-11; T89-12; T89-13; T89-14; T89-15; T89-16; T89-17; T89-19; T89-20; T89-21; T89-22; T89-23; T89-24; T89-25; T89-28; T89-30; T89-31; T89-32; T89-33; T89-34; T89-35; T89-36; T89-42-1; T89-47; TSP-1MC; TSP-2MC; TSP-3MC; TY93; Tyro; Uruguay continental margin; Weddell Sea; Western Sahara
    Type: Dataset
    Format: text/tab-separated-values, 910 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Figure 4) Comparison of LDI-inferred SST with UK'37 inferred SST from sediment core GeoB6518-1 (2012)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: AGE; Congo Fan; DEPTH, sediment/rock; GeoB6518-1; Gravity corer (Kiel type); M47/3; Meteor (1986); Sea surface temperature, annual mean; SL; SST, from long chain diol index (LDI); SST, from UK'37
    Type: Dataset
    Format: text/tab-separated-values, 285 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Evaluation of long chain 1,14-alkyl diols in marine surface sediments (2014)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 286; 288; 291; 293; 295; 297; 298; 300; 301; 305; 306; 307; 309; 310; 311; 313; 314; 316; 317; 318; 319; 320; 321; 322; 323; 324; 325; 326; 327; 328; 329; 330; 332; 407-3; 412-2; 416-2; 420-2; 422-2; 423-3; 424-3; 426-3; 430-4; 435-1; 438-1; AMR-1MC; AMR-2; Amundsen Sea; Arabian Sea; Arctic Ocean; AT_II-107_19; AT_II-107_22; AT_II-107_28; AT_II-107_9; ATII_USA; Atlantis II (1963); AUSCAN; Baltic Sea; Barents Sea; BC; Bodensee; Bottom grab (Smith-McIntyre); Box corer; Brazil Basin; BS-3; bs-6_baltic-proper; BS625; BS627; BS629; BS631; BS633; BS635; BS639; BS645; BS647; BS651; BS653; BS655; BS659; BS661; BS667; BS669; BS673; BS690; CALYPSO; Calypso Corer; Cape Blanc; Central South Atlantic; Comment; Congo Fan; CTD/Rosette; CTD-RO; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DNT05-22; Drake Passage; Elevation of event; Event label; GC; GeoB10032-1; GeoB10034-3; GeoB10038-3; GeoB13601-3; GeoB13604-2; GeoB13606-2; GeoB13609-2; GeoB13610-2; GeoB13611-3; GeoB13612-3; GeoB13613-3; GeoB13615-4; GeoB13616-6; GeoB13618-1; GeoB1501-1; GeoB1503-2; GeoB2022-3; GeoB2102-1; GeoB2104-1; GeoB2105-3; GeoB2108-1; GeoB2111-2; GeoB2125-2; GeoB2130-1; GeoB2205-4; GeoB2208-1; GeoB2215-8; GeoB2216-2; GeoB2705-7; GeoB2712-1; GeoB2714-5; GeoB2715-1; GeoB2727-1; GeoB2730-1; GeoB2731-1; GeoB2734-2; GeoB2802-2; GeoB2803-2; GeoB2810-2; GeoB2829-1; GeoB6411-4; GeoB6412-1; GeoB6422-5; GeoB6424-1; GeoB6518-1; GeoB7926-2; GeoB8301-5; GeoB8318-1; GeoB8331-2; GeoB9501-4; GeoB9503-3; GeoB9506-3; GeoB9508-4; GeoB9510-3; GeoB9512-4; GeoB9513-5; GeoB9515-2; GeoB9516-4; GeoB9520-4; GeoB9521-3; GeoB9522-2; GeoB9524-3; GeoB9525-5; GeoB9526-4; GeoB9528-1; GeoB9529-1; GeoB9531-2; GeoB9532-1; GeoB9533-3; GeoB9534-4; GeoB9535-5; GeoB9536-4; GeoB9537-4; GeoB9538-5; GeoB9539-1; GeoB9540-1; GeoB9541-1; GeoB9542-1; GeoB9543-1; GeoB9544-1; GeoB9545-1; GeoB9547-2; Giant box corer; GKG; Gravity corer; Gravity corer (Kiel type); Gulf of St. Lawrence; Gullmarsfjord; HB5; HB6; HON02-15; Hudson Bay; IMAGES X - CADO; Indian Ocean; KAL; Kasten corer; LA07/9; Lance; Latitude of event; LMG04-04-KC16; LMG04-04-KC3; LMG05-02KC25; LMG98-02-KC6; Long chain diol, C28:1 1,14-diol, fractional abundance; Long chain diol, C28 1,13-diol, fractional abundance; Long chain diol, C28 1,14-diol, fractional abundance; Long chain diol, C30:1 1,14-diol, fractional abundance; Long chain diol, C30 1,13-diol, fractional abundance; Long chain diol, C30 1,14-diol, fractional abundance; Long chain diol, C30 1,15-diol, fractional abundance; Long chain diol, C32 1,15-diol, fractional abundance; Longitude of event; M16/2; M2003-1; M2003-8; M23/1; M23/2; M23/3; M29/1; M29/2; M46/4; M47/3; M53/1; M57/1; M65/1; Maria S. Merian; Marion Dufresne (1995); Mauritania Canyon; MD032603; MD03-2603; MD032604G; MD03-2604G; MD032607; MD03-2607; MD130; MD131; Meteor (1986); Method/Device of event; MS-1; MS-3; MS-4; MSM11/2; MUC; MultiCorer; Nathaniel B. Palmer; NBP00-03-KC1; NBP00-03-KC28; NBP00-03-KC29; NBP00-03-KC30; NBP01-07-KC17; NBP01-07-KC49; NBP06-03-3KC; NBP0702; NBP0702_SMG10; NBP0702_SMG13; NBP0702_SMG15; NBP0702_SMG17; NBP0702_SMG20; NBP0702_SMG22; NBP0702_SMG3; NBP95-07-KC2; NBP9903; NBP9903_KC20; NBP9903_KC21; NIOZ89; Northern Mauretania, Cape Timiris; Northern Senegal; North Greenland Sea; North-West African margin; Norwegian Sea; NP-07-13-08; NP-07-13-11; NP-07-13-13; NP-07-13-14; NP-07-13-16; NP-07-13-21; NP-07-13-23; NP-07-13-24; NP-07-13-25; NP-07-13-30; NP-07-13-31; NP-07-13-32; NP-07-13-33; NP-07-13-35; NP-07-13-40; NP-07-13-41; NP-07-13-42; NP-07-13-47; NP-07-13-49; NP-07-13-50; NP-07-13-51; NP-07-13-52; NP-07-13-60; NP-07-13-64; NP-07-13-9; PABESIA; PC; PD90-7-SMG21; PD90-7-SMG6; PD90-7-SMG8; PD90-7-SMG9; Piston corer; Ross Sea; Santos Plateau; Scotia Sea; Senegal Mudbelt; sept01-07; Skagerrak; SL; Slope off Argentina; SMG; SO184/1; Sonne; South Atlantic Ocean; Southeast Atlantic; Southern Ocean; Southern Senegal; South Pacific Ocean; ST_32; ST_34; ST_35; ST_45; Station_A; Station_B; T89-10; T89-11; T89-12; T89-13; T89-14; T89-15; T89-16; T89-17; T89-19; T89-20; T89-21; T89-22; T89-23; T89-24; T89-25; T89-28; T89-30; T89-31; T89-32; T89-33; T89-34; T89-35; T89-36; T89-42-1; T89-47; TSP-1MC; TSP-2MC; TSP-3MC; TY93; Tyro; Uruguay continental margin; Weddell Sea; Western Sahara
    Type: Dataset
    Format: text/tab-separated-values, 1931 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Diol Saturation Index, Diol Chain Length Index and Upwelling Index in marine surface sediments (2014)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 286; 288; 291; 293; 295; 297; 298; 300; 301; 305; 306; 307; 309; 310; 311; 313; 314; 316; 317; 318; 319; 320; 321; 322; 323; 324; 325; 326; 327; 328; 329; 330; 332; 407-3; 412-2; 416-2; 420-2; 422-2; 423-3; 424-3; 426-3; 430-4; 435-1; 438-1; AMR-1MC; AMR-2; Amundsen Sea; Arabian Sea; Arctic Ocean; Area/locality; AT_II-107_19; AT_II-107_9; ATII_USA; Atlantis II (1963); AUSCAN; Barents Sea; BC; Bottom grab (Smith-McIntyre); Box corer; Brazil Basin; BS625; BS627; BS629; BS631; BS633; BS635; BS639; BS645; BS647; BS651; BS653; BS655; BS659; BS661; BS667; BS669; BS673; BS690; CALYPSO; Calypso Corer; Cape Blanc; Central South Atlantic; Congo Fan; CTD/Rosette; CTD-RO; DEPTH, sediment/rock; Diol chain length index; Diol saturation index; Diol upwelling index; Drake Passage; Elevation of event; Event label; GC; GeoB10032-1; GeoB10034-3; GeoB10038-3; GeoB13601-3; GeoB13604-2; GeoB13606-2; GeoB13609-2; GeoB13610-2; GeoB13611-3; GeoB13612-3; GeoB13613-3; GeoB13615-4; GeoB13616-6; GeoB13618-1; GeoB2102-1; GeoB2104-1; GeoB2105-3; GeoB2108-1; GeoB2111-2; GeoB2125-2; GeoB2130-1; GeoB2205-4; GeoB2208-1; GeoB2215-8; GeoB2216-2; GeoB2712-1; GeoB2714-5; GeoB2715-1; GeoB2727-1; GeoB2730-1; GeoB2731-1; GeoB2734-2; GeoB2802-2; GeoB2803-2; GeoB2810-2; GeoB2829-1; GeoB6411-4; GeoB6412-1; GeoB6422-5; GeoB6424-1; GeoB6518-1; GeoB7926-2; GeoB8301-5; GeoB9501-4; GeoB9503-3; GeoB9506-3; GeoB9508-4; GeoB9510-3; GeoB9512-4; GeoB9513-5; GeoB9515-2; GeoB9516-4; GeoB9520-4; GeoB9521-3; GeoB9522-2; GeoB9524-3; GeoB9525-5; GeoB9526-4; GeoB9528-1; GeoB9529-1; GeoB9531-2; GeoB9532-1; GeoB9533-3; GeoB9534-4; GeoB9535-5; GeoB9536-4; GeoB9537-4; GeoB9538-5; GeoB9539-1; GeoB9540-1; GeoB9541-1; GeoB9542-1; GeoB9543-1; GeoB9544-1; GeoB9545-1; GeoB9547-2; Giant box corer; GKG; Gravity corer; Gravity corer (Kiel type); Gulf of St. Lawrence; Gullmarsfjord; HB5; HB6; HON02-15; Hudson Bay; IMAGES X - CADO; Indian Ocean; KAL; Kasten corer; LA07/9; Lance; Latitude of event; LMG04-04-KC16; LMG04-04-KC3; LMG05-02KC25; LMG98-02-KC6; Longitude of event; M2003-1; M2003-8; M23/2; M23/3; M29/1; M29/2; M46/4; M47/3; M53/1; M57/1; M65/1; Maria S. Merian; Marion Dufresne (1995); Mauritania Canyon; MD032603; MD03-2603; MD032607; MD03-2607; MD130; MD131; Meteor (1986); MS-1; MS-3; MS-4; MSM11/2; MUC; MultiCorer; Nathaniel B. Palmer; NBP00-03-KC1; NBP00-03-KC28; NBP00-03-KC29; NBP00-03-KC30; NBP01-07-KC17; NBP01-07-KC28; NBP01-07-KC49; NBP06-03-3KC; NBP0702; NBP0702_SMG10; NBP0702_SMG13; NBP0702_SMG15; NBP0702_SMG17; NBP0702_SMG20; NBP0702_SMG22; NBP0702_SMG3; NBP95-07-KC2; NBP9903; NBP9903_KC20; NIOZ89; Northern Mauretania, Cape Timiris; Northern Senegal; North Greenland Sea; North-West African margin; Norwegian Sea; NP-07-13-08; NP-07-13-11; NP-07-13-14; NP-07-13-21; NP-07-13-23; NP-07-13-24; NP-07-13-25; NP-07-13-30; NP-07-13-31; NP-07-13-32; NP-07-13-33; NP-07-13-35; NP-07-13-40; NP-07-13-41; NP-07-13-42; NP-07-13-47; NP-07-13-49; NP-07-13-50; NP-07-13-60; NP-07-13-64; NP-07-13-9; PABESIA; PC; PD90-7-SMG21; PD90-7-SMG6; Piston corer; Ross Sea; Santos Plateau; Scotia Sea; Senegal Mudbelt; sept01-07; Skagerrak; SL; Slope off Argentina; SMG; SO184/1; Sonne; South Atlantic Ocean; Southeast Atlantic; Southern Ocean; Southern Senegal; South Pacific Ocean; ST_32; ST_45; Station_A; Station_B; T89-10; T89-11; T89-12; T89-13; T89-14; T89-15; T89-16; T89-17; T89-19; T89-20; T89-21; T89-22; T89-23; T89-24; T89-25; T89-28; T89-30; T89-31; T89-32; T89-33; T89-34; T89-35; T89-36; T89-42-1; T89-47; TY93; Tyro; Uruguay continental margin; Weddell Sea; Western Sahara
    Type: Dataset
    Format: text/tab-separated-values, 1110 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Evaluation of long chain 1,14-alkyl diols in marine sediments as indicators for upwelling and temperature (2014)
    Elsevier
    In:  EPIC3Organic Geochemistry, Elsevier, 76, pp. 39-47, ISSN: 0146-6380
    Details
    Publication Date: 2015-01-13
    Description: Long chain alkyl diols form a group of lipids occurring widely in marine environments. Recent studies have suggested several palaeoclimatological applications for proxies based on their distributions, but have also revealed uncertainty about their applicability. Here we evaluate the use of long chain 1,14-alkyl diol indices for reconstruction of temperature and upwelling conditions by comparing index values, obtained from a comprehensive set of marine surface sediments, with environmental factors such as sea surface temperature (SST), salinity and nutrient concentration. Previous studies of cultures indicated a strong effect of temperature on the degree of saturation and the chain length distribution of long chain 1,14-alkyl diols in Proboscia spp., quantified as the diol saturation index (DSI) and diol chain length index (DCI), respectively. However, values of these indices for surface sediments showed no relationship with annual mean SST of the overlying water. It remains unknown as to what determines the DSI, although our data suggest that it may be affected by diagenesis, while the relationship between temperature and DCI may be different for different Proboscia species. In addition, contributions from algae other than Proboscia diatoms may affect both indices, although our data provide no direct evidence for additional long chain 1,14-alkyl diol sources. Two other indices using the abundance of 1,14-diols vs. 1,13-diols and C30 1,15- diols have been applied previously as indicators for upwelling intensity at different locations. The geographical distribution of their values supports the use of 1,14 diols vs. 1,13 diols [C28 + C30 1,14-diols]/[(C28 + C30 1,13-diols) + (C28 + C30 1,14-diols)] as a general indicator for high nutrient or upwelling conditions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 9
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    Long chain 1,13- and 1,15-diols as a potential proxy for palaeotemperature reconstruction (2012)
    ELSEVIER SCIENCE BV
    In:  EPIC3Geochimica et Cosmochimica Acta, ELSEVIER SCIENCE BV, 84, pp. 204-216, ISSN: 00167037
    Details
    Publication Date: 2019-07-17
    Description: Although commonly reported in marine and freshwater environments, little is known about the biological sources of long chain alkyl 1,13- and 1,15-diols, and factors controlling their distributions. Here we analyzed the occurrence and distribution of these lipids in a comprehensive set of marine surface sediments and compare their distributions with environmental conditions like sea surface temperature (SST), salinity and nutrient concentrations. Fractional abundances of the C28 1,13-, C30 1,13- and C30 1,15-diols show a strong correlation with SST and based on these results, we propose the Long chain Diol Index (LDI), which expresses the C30 1,15-diol abundance relative to those of C28 1,13-, C30 1,13- and C30 1,15-diols. The LDI shows a strong linear correlation with SST (LDI = 0.033 � SST + 0.095; R2 = 0.969, n = 162) over a temperature range of �3 to 27 �C. Long chain diol distributions in sediments from the South Atlantic close to the Congo River outflow (West Africa) provided a 43 kyr LDI SST record. This record reflects several known climatic events and shows similarities with an alkenone- derived SST record obtained using the same suite of sediments, both in trend and in terms of absolute SST. This confirms the potential of the LDI as a proxy for palaeo-SST reconstruction.
    Repository Name: EPIC Alfred Wegener Institut
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  • 10
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    Evaluation of long chain 1, 14-alkyl diols in marine sediments as indicators for upwelling and temperature (2014)
    Elsevier
    In:  EPIC3Organic Geochemistry, Elsevier, 76, pp. 39-47
    Details
    Publication Date: 2018-04-11
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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