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Hurley, Sarah J; Lipp, Julius S; Close, Hilary G; Hinrichs, Kai-Uwe; Pearson, Ann (2018): Glycerol dialkyl glycerol tetraethers (GDGT) abundance in suspended particulate matter from the South-west and Equatorial Atlantic Ocean. PANGAEA,, Supplement to: Hurley, SJ et al. (2018): Distribution and export of isoprenoid tetraether lipids in suspended particulate matter from the water column of the Western Atlantic Ocean. Organic Geochemistry, 116, 90-102,

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The TEX86 paleotemperature proxy is based on the distribution of archaeal glycerol dibiphytanyl glycerol tetraether (GDGT) lipids preserved in marine sediments, yet both the influence of different physiological factors on the structural distribution of GDGTs and the mechanism(s) by which GDGTs is(are) exported to marine sediments remain(s) unresolved. We investigated the abundance and structural distribution of GDGTs in the South-west and Equatorial Atlantic Ocean in four water column profiles spanning 48 degrees of latitude. The depth distribution was consistent with production by ammonia-oxidizing Thaumarchaeota; maximum GDGT concentration occurred at the base of the NO2**- maximum, core GDGTs dominated the structural distribution in surface waters above the NO2**- maximum, and intact polar GDGTs - potentially indicating live cells - were more abundant below the NO2**- maximum. Between 0 and1000 m, > 98% of the integrated GDGT inventory was present in waters at and below the NO2**- maximum. Depth profiles of TEX86 temperature values displayed local minima at the NO2**- maximum, while the ratio of GDGT-2:GDGT-3 increased with depth. A model based on the results predicts an average depth of origin for GDGTs exported to sediments between ca. 80-250?m. In the model, exported TEX86 values are remarkably insensitive to change in the average depth of origin of GDGTs. However, TEX86 values exported from the water column appear to reflect euphotic zone productivity, possibly due to the correlative intensity of organic matter remineralization providing substrates for ammonia oxidation. Predicting the influence of these regional controls on sedimentary TEX86 records requires a better understanding of the interaction between GDGT production, particle dynamics, and the depth of origin for exported organic matter.
Median Latitude: -12.765764 * Median Longitude: -40.947708 * South-bound Latitude: -38.003031 * West-bound Longitude: -55.302840 * North-bound Latitude: 9.703630 * East-bound Longitude: -28.503500
Date/Time Start: 2013-03-27T22:06:00 * Date/Time End: 2013-05-06T16:39:00
Minimum DEPTH, water: m * Maximum DEPTH, water: 1500 m
20130327.2206.001 (2) * Latitude: -37.991830 * Longitude: -44.997610 * Date/Time: 2013-03-27T22:06:00 * Elevation: -5122.0 m * Campaign: KN210-04 * Basis: Knorr * Method/Device: McLane Pump (McLP) * Comment: 5 pumps; depths 350 750 1000 1500 m; pump time 6 hrs. 500m pump failure
20130328.1437.001 (2) * Latitude: -37.998236 * Longitude: -44.998757 * Date/Time: 2013-03-28T14:37:00 * Elevation: -5121.0 m * Campaign: KN210-04 * Basis: Knorr * Method/Device: McLane Pump (McLP) * Comment: 5 pumps. target 5 40 75 150 250 m actual. pump time 4 hrs
20130329.0154.001 (2) * Latitude: -37.999951 * Longitude: -44.995571 * Date/Time: 2013-03-29T01:54:00 * Campaign: KN210-04 * Basis: Knorr * Method/Device: McLane Pump (McLP) * Comment: target 75 75 500 750 750 m. 6 hr pump time
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventHurley, Sarah J
2Latitude of eventLatitudeHurley, Sarah J
3Longitude of eventLongitudeHurley, Sarah J
4Date/time startDate/time startHurley, Sarah J
5Date/time endDate/time endHurley, Sarah J
6Sample code/labelSample labelHurley, Sarah J
7Station labelStationHurley, Sarah J
8FilterFilterHurley, Sarah J
9DEPTH, waterDepth watermHurley, Sarah JGeocode
10Hexosephosphohexose acyclic glycerol dialkyl glycerol tetraetherHPH-GDGT-0ng/lHurley, Sarah J
11Hexosephosphohexose monocyclic glycerol dialkyl glycerol tetraetherHPH-GDGT-1ng/lHurley, Sarah J
12Hexosephosphohexose dicyclic glycerol dialkyl glycerol tetraetherHPH-GDGT-2ng/lHurley, Sarah J
13Hexosephosphohexose tricyclic glycerol dialkyl glycerol tetraetherHPH-GDGT-3ng/lHurley, Sarah J
14Hexosephosphohexose tetracyclic glycerol dialkyl glycerol tetraetherHPH-GDGT-4ng/lHurley, Sarah J
15Hexosephosphohexose crenarchaeolHPH-GDGT-crenng/lHurley, Sarah J
16Hexosephosphohexose crenarchaeol regio-isomerHPH-GDGT-cren'ng/lHurley, Sarah J
17Monoglycosyl acyclic glycerol dialkyl glycerol tetraether1G-GDGT-0ng/lHurley, Sarah J
18Monoglycosyl monocyclic glycerol dialkyl glycerol tetraether1G-GDGT-1ng/lHurley, Sarah J
19Monoglycosyl dicyclic glycerol dialkyl glycerol tetraether1G-GDGT-2ng/lHurley, Sarah J
20Monoglycosyl tricyclic glycerol dialkyl glycerol tetraether1G-GDGT-3ng/lHurley, Sarah J
21Monoglycosyl tetracyclic glycerol dialkyl glycerol tetraether1G-GDGT-4ng/lHurley, Sarah J
22Monoglycosyl crenarchaeol1G-GDGT-crenng/lHurley, Sarah J
23Monoglycosyl crenarchaeol regio-isomer1G-GDGT-cren'ng/lHurley, Sarah J
24Diglycosyl acyclic glycerol dialkyl glycerol tetraether2G-GDGT-0ng/lHurley, Sarah J
25Diglycosyl monocyclic glycerol dialkyl glycerol tetraether2G-GDGT-1ng/lHurley, Sarah J
26Diglycosyl dicyclic glycerol dialkyl glycerol tetraether2G-GDGT-2ng/lHurley, Sarah J
27Diglycosyl tricyclic glycerol dialkyl glycerol tetraether2G-GDGT-3ng/lHurley, Sarah J
28Diglycosyl tetracyclic glycerol dialkyl glycerol tetraether2G-GDGT-4ng/lHurley, Sarah J
29Diglycosyl crenarchaeol2G-GDGT-crenng/lHurley, Sarah J
30Diglycosyl crenarchaeol regio-isomer2G-GDGT-cren'ng/lHurley, Sarah J
31Core acyclic glycerol dialkyl glycerol tetraetherC-GDGT-0ng/lHurley, Sarah J
32Core monocyclic glycerol dialkyl glycerol tetraetherC-GDGT-1ng/lHurley, Sarah J
33Core dicyclic glycerol dialkyl glycerol tetraetherC-GDGT-2ng/lHurley, Sarah J
34Core tricyclic glycerol dialkyl glycerol tetraetherC-GDGT-3ng/lHurley, Sarah J
35Core tetracyclic glycerol dialkyl glycerol tetraetherC-GDGT-4ng/lHurley, Sarah J
36Core crenarchaeolC-GDGT-crenng/lHurley, Sarah J
37Core crenarchaeol regio-isomerC-GDGT-cren'ng/lHurley, Sarah J
38Hexosephosphohexose glycerol dialkyl glycerol tetraethers, totalHPH-GDGTsng/lHurley, Sarah J
39Monoglycosyl glycerol dialkyl glycerol tetraethers, total1G-GDGTsng/lHurley, Sarah J
40Diglycosyl glycerol dialkyl glycerol tetraethers, total2G-GDGTsng/lHurley, Sarah J
41Sum core glycerol dialkyl glycerol tetraethersC-GDGTsng/lHurley, Sarah J
42Glycerol dialkyl glycerol tetraethers, totalGDGTsng/lHurley, Sarah J
43Tetraether index of 86 carbon atoms of hexosephosphohexose glycerol dialkyl glycerol tetraethersTEX86 of HPH-GDGTsHurley, Sarah J
44Tetraether index of 86 carbon atoms of monoglycosyl glycerol dialkyl glycerol tetraethersTEX86 of 1G-GDGTsHurley, Sarah J
45Tetraether index of 86 carbon atoms of diglycosyl glycerol dialkyl glycerol tetraethersTEX86 of 2G-GDGTsHurley, Sarah J
46Tetraether index of 86 carbon atoms of core glycerol dialkyl glycerol tetraethersTEX86 of C-GDGTsHurley, Sarah J
47Tetraether index of 86 carbon atoms of glycerol dialkyl glycerol tetraethersTEX86 of GDGTsHurley, Sarah Jtotal
48Temperature, calculatedT cal°CHurley, Sarah JCalculated from TEX86H (Kim et al., 2012)HPH TEXH86 T
49Temperature, calculatedT cal°CHurley, Sarah JCalculated from TEX86H (Kim et al., 2012)1G TEXH86 T
50Temperature, calculatedT cal°CHurley, Sarah JCalculated from TEX86H (Kim et al., 2012)2G TEXH86 T
51Temperature, calculatedT cal°CHurley, Sarah JCalculated from TEX86H (Kim et al., 2012)C TEXH86 T
52Temperature, calculatedT cal°CHurley, Sarah JCalculated from TEX86H (Kim et al., 2012)total TEXH86 T
53RatioRatioHurley, Sarah JHPH-GDGT-2:HPH-GDGT-3 (HPH [2/3])
54RatioRatioHurley, Sarah J1G-GDGT-2:1G-GDGT-3 (1G [2/3])
55RatioRatioHurley, Sarah J2G-GDGT-2:2G-GDGT-3 (2G [2/3])
56RatioRatioHurley, Sarah JC-GDGT-2:C-GDGT-3 (C [2/3])
57RatioRatioHurley, Sarah JTotal GDGT-2:Total GDGT-3 (Total [2/3])
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