Data Description

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Citation:
Kaiser, J et al. (2014): (Table 1) Lipid biomarkers in surface sediments from the Gulf of Genoa. doi:10.1594/PANGAEA.834669,
Supplement to: Kaiser, Jérome; Ruggieri, Nicoletta; Hefter, Jens; Siegel, Herbert; Mollenhauer, Gesine; Arz, Helge W; Lamy, Frank (2014): Lipid biomarkers in surface sediments from the Gulf of Genoa, Ligurian sea (NW Mediterranean sea) and their potential for the reconstruction of palaeo-environments. Deep Sea Research Part I: Oceanographic Research Papers, 89, 68-83, doi:10.1016/j.dsr.2014.04.009
Abstract:
A series of molecular organic markers were determined in surface sediments from the Gulf of Genoa (Ligurian Sea) in order to evaluate their potential for palaeo-environmental reconstructions. Allochthonous input can be characterized by the distributions of n-C29 and n-C31 alkanes, n-C26 and n-C28 alkanols and branched glycerol dialkyl glycerol tetraethers (GDGTs), whose concentrations are generally highest near the river mouths. In the open basin however, terrestrial n-alkanes and n-alkanols may have an additional, aeolian source. Autochthonous input is represented by crenarchaeol and isoprenoid GDGTs. Their concentrations are highest in the open basin showing the preference of Thaumarchaeota for oligotrophic waters. Indications of a significant degradation of sterols and C37 alkenones exclude these lipids as reliable productivity proxies. Using terrestrial and aquatic lipids as end-members allows estimating the percentage of terrestrial organic matter between 20% and 58% in the coastal area decreasing to 1 to 30% in the deep basin. The spatial distribution of sea surface temperature (SST) estimates using the alkenone-based UK'37 index is very similar to the autumnal (November) mean satellite-based SST distribution. Conversely, TEXH86-derived SST estimates are close to winter SSTs in the coastal area and summer SSTs in the open basin. This pattern reflects presumably a shift in the main production of Thaumarchaeota from the coastal area in winter to the open basin in summer. This study represents a major prerequisite for the future application of lipid biomarkers on sediment cores from the Gulf of Genoa.
Project(s):
Coverage:
Median Latitude: 43.868715 * Median Longitude: 8.781489 * South-bound Latitude: 43.043830 * West-bound Longitude: 7.586350 * North-bound Latitude: 44.394900 * East-bound Longitude: 10.117500
Date/Time Start: 2011-05-13T08:30:00 * Date/Time End: 2011-05-26T06:00:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
Event(s):
POS413_04-3 * * Latitude: 43.662500 * Longitude: 9.031667 * Date/Time: 2011-05-13T08:30:00 * Elevation: -1860.2 m * Recovery: 0.25 m * Location: Ligurian Sea, Mediterranean * * Campaign: POS413 (P413) * * Basis: Poseidon * * Device: MultiCorer (MUC) * * Comment: MUC, working area: 2
POS413_05-1 * * Latitude: 43.707167 * Longitude: 9.020667 * Date/Time: 2011-05-13T10:45:00 * Elevation: -1737.0 m * Recovery: 0.28 m * Location: Ligurian Sea, Mediterranean * * Campaign: POS413 (P413) * * Basis: Poseidon * * Device: MultiCorer (MUC) * * Comment: MUC, working area: 2
POS413_06-2 * * Latitude: 43.780667 * Longitude: 9.215333 * Date/Time: 2011-05-14T06:44:00 * Elevation: -1288.0 m * Recovery: 0.26 m * Location: Ligurian Sea, Mediterranean * * Campaign: POS413 (P413) * * Basis: Poseidon * * Device: MultiCorer (MUC) * * Comment: MUC, working area: 2
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Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event label *Event
2Latitude of event *Latitude
3Longitude of event *Longitude
4Elevation of event *Elevationm
5DEPTH, sediment/rock *DepthmGeocode
6Carbon, organic, total *TOC%Kaiser, Jérome *
7Nitrogen, total *TN%Kaiser, Jérome *
8Carbon/Nitrogen ratio *C/NKaiser, Jérome *
9Unresolved complex mixture per unit mass total organic carbon *UCM/TOCmg/gKaiser, Jérome *
10n-Alkane, sum per unit mass total organic carbon *n-A sum/TOCµg/gKaiser, Jérome *n-C27, n-C29, n-C31 alkanes
11n-Alkanol, sum per unit mass total organic carbon *n-Ao sum/TOCµg/gKaiser, Jérome *n-C26, n-C28, n-C30 alkanols
12Crenarchaeol per unit mass total organic carbon *GDGT-5/TOCµg/gKaiser, Jérome *
13Isoprenoid glycerol dialkyl glycerol tetraether per unit mass total organic carbon *iso GDGT/TOCµg/gKaiser, Jérome *Sum of isoprenoid GDGT-0,-1,-2,-3,-4 and-4'
14Branched glycerol dialkyl glycerol tetraether per unit mass total organic carbon *br GDGTs I-III/TOCµg/gKaiser, Jérome *GDGT-I, -II and-III
15Carbon Preference Index, n-Alkanes *CPI n-AlkanesKaiser, Jérome *CPI (n-alkanes) = 0.5*(([n-C27]+[n-C29]+[n-C31]+[n-C33])/([n-C26]+[n-C28]+[n-C30]+[n-C32]))+0.5*([n-C27]+[n-C29]+[n-C31]+[n-C33])/([n-C28]+[n-C30]+[n-C32]+[n-C34]))
16Average chain length *ACLKaiser, Jérome *ACL(n-alkanes) = (25*[n-C25]+27*[n-C27]+29*[n-C29]+31*[n-C31]+33*[n-C33])/([n-C25]+[n-C27]+[n-C29]+[n-C31]+[n-C33])
17Higher Plant Alkanes index *HPA-indexKaiser, Jérome *HPA = [n-C26]+[n-C28]+[n-C30] alkanols/([n-C26]+[n-C28]+[n-C30] alkanols)+([n-C27]+[n-C29]+[n-C31]alkanes)
18Alkanol preservation index *APIKaiser, Jérome *API28/29 = [n-C28 alkanol]/([n-C28 alkanol]+[n-C29 alkane])
19Alkanol preservation index *APIKaiser, Jérome *API30/31 = [n-C30 alkanol]/[(n-C30 alkanol]+[n-C31alkane])
20Branched and isoprenoid tetraether index *BITKaiser, Jérome *
21Alkenone, unsaturation index UK'37 *UK'37Kaiser, Jérome *UK'37 = [C37:2]/([C37:2]+[C37:3])
22Tetraether index of 86 carbon atoms *TEX86Kaiser, Jérome *TEX86 = ([GDGT-2]+[GDGT-3]+[GDGT-40])/([GDGT-1]+[GDGT-2]+[GDGT-3]+[GDGT-40])
23Tetraether index of 86 carbon atoms *TEX86logKaiser, Jérome *TEXH86 = log(TEX86)
24Sea surface temperature, annual mean *SST (1-12)°CKaiser, Jérome *Calculated from UK37 (Conte et al., 2006) *SST = 29.876*UK'37-1.334
25Sea surface temperature, annual mean *SST (1-12)°CKaiser, Jérome *Calculated from TEX86 (Kim et al., 2008) *SST = 56.2*TEX86-10.8
26Sea surface temperature, annual mean *SST (1-12)°CKaiser, Jérome *Calculated from TEX86 (Kim et al., 2010) *SST = 68.4*TEXH86+38.6
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