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Pagani, Mark; Pedentchouk, Nikolai; Huber, Matthew; Sluijs, Appy; Schouten, Stefan; Brinkhuis, Henk; Sinninghe Damsté, Jaap S; Dickens, Gerald Roy; Expedition 302 Scientists (2006): Stable carbon isotope ratios of alkane of IODP Hole 302-M0004A. PANGAEA, https://doi.org/10.1594/PANGAEA.733130, Supplement to: Pagani, M et al. (2006): Arctic hydrology during global warming at the Palaeocene/Eocene thermal maximum. Nature, 442(10), 671-675, https://doi.org/10.1038/nature05043

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Abstract:
The Palaeocene/Eocene thermal maximum represents a period of rapid, extreme global warming approx ~55 million years ago, superimposed on an already warm world (Zachos et al., 2003, doi:10.1126/science.1090110; Bowen et al., 2004, doi:10.1038/nature03115; Thomas et al., 2002, doi:10.1130/0091-7613(2002)030<1067:WTFFTF>2.0.CO;2). This warming is associated with a severe shoaling of the ocean calcite compensation depth **4 and a >2.5 per mil negative carbon isotope excursion in marine and soil carbonates (Zachos et al., 2003, doi:10.1126/science.1090110; Bowen et al., 2004, doi:10.1038/nature03115; Thomas et al., 2002, doi:10.1130/0091-7613(2002)030<1067:WTFFTF>2.0.CO;2; Zachos et al., doi:10.1126/science.1109004). Together these observations indicate a massive release of 13C-depleted carbon (Zachos et al., doi:10.1126/science.1109004) and greenhouse-gas-induced warming. Recently, sediments were recovered from the central Arctic Ocean (Backman et al., 2006, doi:10.2204/iodp.proc.302.2006), providing the first opportunity to evaluate the environmental response at the North Pole at this time. Here we present stable hydrogen and carbon isotope measurements of terrestrial-plant- and aquatic-derived n-alkanes that record changes in hydrology, including surface water salinity and precipitation, and the global carbon cycle. Hydrogen isotope records are interpreted as documenting decreased rainout during moisture transport from lower latitudes and increased moisture delivery to the Arctic at the onset of the Palaeocene/Eocene thermal maximum, consistent with predictions of poleward storm track migrations during global warming (Backman et al., 2006, doi:10.2204/iodp.proc.302.2006). The terrestrial-plant carbon isotope excursion (about ~4.5 to ~6 per mil) is substantially larger than those of marine carbonates. Previously, this offset was explained by the physiological response of plants to increases in surface humidity (Bowen et al., 2004, doi:10.1038/nature03115). But this mechanism is not an effective explanation in this wet Arctic setting, leading us to hypothesize that the true magnitude of the excursion - and associated carbon input - was greater than originally surmised. Greater carbon release and strong hydrological cycle feedbacks may help explain the maintenance of this unprecedented warmth.of this unprecedented warmth.
Coverage:
Latitude: 87.866580 * Longitude: 136.177350
Date/Time Start: 2004-08-27T00:00:00 * Date/Time End: 2004-08-27T00:00:00
Minimum DEPTH, sediment/rock: 378.21 m * Maximum DEPTH, sediment/rock: 390.71 m
Event(s):
302-M0004A (ACEX-M4A) * Latitude: 87.866580 * Longitude: 136.177350 * Date/Time: 2004-08-27T00:00:00 * Elevation: -1287.9 m * IGSN: IBCR0302RHVS001 * Penetration: 427.9 m * Recovery: 85.91 m * Location: Arctic Ocean * Campaign: Exp302 (Arctic Coring Expedition, ACEX) * Basis: CCGS Captain Molly Kool (Vidar Viking)
Comment:
Depth, sediment=Depth (mcd)
Parameter(s):
Size:
417 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Depth sed [m]

Sample label

C17 δ13C [‰ PDB]

C17 δ13C std dev [±]

C27 δ13C [‰ PDB]

C27 δ13C std dev [±]

C29 δ13C [‰ PDB]

C29 δ13C std dev [±]

C17 δD [‰ SMOW]
10 
C17 δD std dev [±]
11 
C27 δD [‰ SMOW]
12 
C27 δD std dev [±]
13 
C29 δD [‰ SMOW]
14 
C29 δD std dev [±]
378.21302-M0004A-29X-30.80.2-30.30.5-29.90.1-1201-2382-2251
378.41302-M0004A-29X-31.1-31.1-30.1-1133-2302-2212
378.61302-M0004A-29X-30.4-31.3-30.9-1032-2283-2153
378.81302-M0004A-29X-30.60.1-31.70.1-31.20.3-973-2352-2243
379.01302-M0004A-29X-31.9-31.5-31.4-1181-2421-2320
380.31302-M0004A-30X-32.7-32.0-2223-2142
380.51302-M0004A-30X-32.20.0-31.80.1
380.71302-M0004A-30X-31.5-31.7
380.91302-M0004A-30X-31.70.8-31.90.4
381.11302-M0004A-30X-32.0-31.8-2331-2253
381.31302-M0004A-30X-32.4-32.1
381.51302-M0004A-30X-30.7-33.0-32.0-1132-2241-2104
381.71302-M0004A-30X-31.6-33.20.1-32.40.0-2282-2173
381.82302-M0004A-30X-34.00.2-33.00.2-2352-2332
382.02302-M0004A-30X-30.70.0-33.70.1-33.20.0-1151-2342-2290
382.22302-M0004A-30X-30.6-34.3-34.0-973-2321-2241
382.42302-M0004A-30X-34.10.5-33.80.1-2311-2292
382.62302-M0004A-30X-31.3-35.0-34.4-1156-2333-2283
382.82302-M0004A-30X-34.20.1-35.20.1-34.10.1-2384-2292
383.02302-M0004A-30X-31.50.2-35.30.5-34.60.3-1100-2491-2291
383.22302-M0004A-30X-31.70.0-35.80.3-34.30.1-1351-2261-2241
383.34302-M0004A-30X-31.5-35.8-34.8-1314-2332-2351
383.54302-M0004A-30X-30.60.3-35.60.0-34.50.0-1301-2350-2213
383.74302-M0004A-30X-31.50.1-35.80.1-34.30.0-1301-2243-2232
383.94302-M0004A-30X-34.20.3-36.10.0-34.20.1-2201-2231
384.14302-M0004A-30X-32.00.0-35.7-34.0-2312-2246
384.34302-M0004A-30X-30.90.1-35.40.4-33.90.4-1215-2151-2142
385.80302-M0004A-31X-33.1-32.7-1911-1833
385.93302-M0004A-31X-32.90.4-31.50.1-1883-1794
386.10302-M0004A-31X-31.10.2-34.40.3-33.20.3-1180-2162-2000
388.01302-M0004A-32X-31.5-31.3-1692-1571
388.21302-M0004A-32X-31.1-30.4-1956-1785
388.41302-M0004A-32X-30.70.4-29.70.4-210-211
388.61302-M0004A-32X-30.7-30.0-29.8-114-2160-2023
388.81302-M0004A-32X-30.6-30.3-30.1-2180-2032
389.01302-M0004A-32X-2251-2143
389.21302-M0004A-32X-31.3-30.4-29.5-1174-2283-2110
389.41302-M0004A-32X
389.51302-M0004A-32X-29.9-30.0-2273-2172
389.71302-M0004A-32X-30.50.4-29.50.5-29.30.1-122-2241-2152
389.91302-M0004A-32X-30.7-30.2-29.9-1172-2241-2150
390.11302-M0004A-32X-30.6-30.4-30.1-1192-2221-2051
390.31302-M0004A-32X-30.00.2-29.70.0-2212-2072
390.51302-M0004A-32X-30.70.1-30.30.1-30.00.2-1183-2322-2241
390.71302-M0004A-32X-30.0-30.10.1-29.60.3-2180-2090