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  • 1
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    Unknown
    PANGAEA
    In:  Supplement to: Yu, Kefu; Hua, Quan; Zhao, Jian-Xin; Hodge, Ed; Fink, David; Barbetti, Mike (2010): Holocene marine 14C reservoir age variability: Evidence from 230Th-dated corals in the South China Sea. Paleoceanography, 25(3), PA3205, https://doi.org/10.1029/2009PA001831
    Publication Date: 2023-05-12
    Description: The South China Sea (SCS) is well connected with the western Pacific and influenced by the East Asian monsoon. We have examined temporal variations in radiocarbon marine reservoir ages (R) and regional marine reservoir corrections (DeltaR) of the SCS during the Holocene using paired measurements of AMS 14C and TIMS 230Th on 20 pristine corals. The results show large fluctuations in both R and DeltaR values over the past 7500 years (yrs) with two distinct plateaus during 7.5-5.6 and 3.5-2.5 thousand calendar years before present (cal ka BP). The respective weighted mean DeltaR values of these plateaus are 151 ± 85 and 89 ± 59 yrs, which are significantly higher than its modern value of -23 ± 52 yrs. This suggests that using a constant modern DeltaR value to calibrate 14C dates of the SCS marine samples will introduce additional errors to the calibrated ages. Our results provide the first database for the Holocene R and DeltaR values of the SCS for improved radiocarbon calibration of marine samples. We interpret the two DeltaR plateaus as being related to two intervals with weakened El Niño - Southern Oscillation (ENSO) and intensified East Asian summer monsoon (EASM). This is because the 14C content of the SCS surface water is controlled by both the 14C concentration of the Pacific North Equatorial Current (NEC) which is in turn influenced by ENSO-induced upwelling along the Pacific equator and vertical upwelling within the SCS as a result of moisture transportation to midlatitude region to supply the EASM rainfall.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 2
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    Unknown
    PANGAEA
    In:  Supplement to: Wei, Gangjian; Deng, Wenfeng; Yu, Kefu; Li, Xian-hua; Sun, Weidong D; Zhao, Jian-Xin (2007): Sea surface temperature records in the northern South China Sea from mid-Holocene coral Sr/Ca ratios. Paleoceanography, 22(3), PA3206, https://doi.org/10.1029/2006PA001270
    Publication Date: 2023-05-12
    Description: Three mid-Holocene sea surface temperature (SST) records spanning more than 30 years were reconstructed for the northern South China Sea using Sr/Ca ratios in Porites corals. The results indicate warmer than present climates between circa 6100 yr B.P. and circa 6500 yr B.P. with the mid-Holocene average minimum monthly winter SSTs, the average maximum monthly summer SSTs, and the average annual SSTs being about 0.5°-1.4°C, 0°-2.0°C, and 0.2°-1.5°C higher, respectively, than they were during 1970-1994. Summer SSTs decrease from circa 6500 yr B.P. to circa 6100 yr B.P. with a minimum centered at circa 6300 yr B.P. The higher average summer SSTs are consistent with a stronger summer monsoon during the mid-Holocene, and the decreasing trend indicates a secular decrease of summer monsoon strength, which reflects the change in summer insolation in the Northern Hemisphere. El Niño-Southern Oscillation (ENSO) cycles were apparent in both the mid-Holocene coral and modern instrumental records. However, the ENSO variability in the mid-Holocene SSTs was weaker than that in the modern record, and the SST record with the highest summer temperatures from circa 6460 yr B.P. to 6496 yr B.P. shows no robust ENSO cycle. This agrees with other studies that indicate that stronger summer monsoon circulation may have been associated with suppressed ENSO variability during the mid-Holocene.
    Keywords: CHEM; Chemistry; Dadonghai; Hainan Island, China
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 3
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Manaa, Ammar A; Jones, Brian G; McGregor, Helen V; Zhao, Jian-Xin; Price, David M (2016): Dating Quaternary raised coral terraces along the Saudi Arabian Red Sea coast. Marine Geology, 374, 59-72, https://doi.org/10.1016/j.margeo.2016.02.002
    Publication Date: 2023-01-13
    Description: Late Pleistocene raised coral reef terraces form extensive outcrops up to 5 km wide along the Saudi coast. Porites coral were dated using Uranium/Thorium while clastic sediment from Jeddah was dated using thermoluminescence. The pooled mean age for the coral samples is 121.5 ± 0.2 ka suggesting MIS 5e, even for the uplifted 16-20 m high terrace in the north at Haql. In Jeddah the MIS 5e back-reef succession is overlain by fluvial sediment that gave a TL age of 66 ± 13 ka. The structure and faunal composition of the coral terraces suggests that they accumulated in broad shallow embayments following the last interglacial transgression. The consistent elevation of these terraces suggests that the central and southern Saudi coast has been tectonically stable for at least the past 125,000 years and the coral reef terraces (at 3.5-5.5 m elevation) are consistent with the MIS 5e sea level high-stand that peaked at 6-9 m above present sea level. The Saudi coastal coral terrace north of Duba shows progressive uplift to 16-20 m near Haql since 108-120 ka as a result of ongoing transform faulting in the Gulf of Aqaba.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
    Publication Date: 2023-02-12
    Keywords: Age, dated standard deviation; Age model; Age model (Thompson et al., 2003); Al-Qattan-01; Al-Qattan-02; Al-Qattan-03; Al-Qattan-04; Aragonite; Description; Duba-01; Duba-02; Duba-03; Duba-04; Event label; HAND; Haql-01; Haql-02; Haql-03; Haql-04; Height above sea level; Latitude of event; Longitude of event; Rabigh-01; Rabigh-02; Rabigh-03; Rabigh-04; Rabigh-05; Rabigh-06; Rabigh-07; Rabigh-08; Rabigh-09; Rabigh-10; Rabigh-11; Rabigh-12; Sample, optional label/labor no; Sampling by hand; X-ray diffraction (XRD); Yanbu-01; Yanbu-02; Yanbu-03; Yanbu-04; Yanbu-05
    Type: Dataset
    Format: text/tab-separated-values, 174 data points
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  • 5
    Publication Date: 2023-02-12
    Keywords: Age, dated; Age, dated standard deviation; Age model; Age model (Thompson et al., 2003); Al-Qattan-01; Al-Qattan-02; Al-Qattan-03; Al-Qattan-04; Duba-01; Duba-02; Duba-03; Duba-04; Event label; HAND; Haql-01; Haql-02; Haql-03; Haql-04; Latitude of event; Longitude of event; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Rabigh-01; Rabigh-02; Rabigh-03; Rabigh-04; Rabigh-05; Rabigh-06; Rabigh-07; Rabigh-08; Rabigh-09; Rabigh-10; Rabigh-11; Rabigh-12; Sample, optional label/labor no; Sampling by hand; Thorium-230/Uranium-232 ratio; Thorium-230/Uranium-232 ratio, standard deviation; Thorium-230/Uranium-238, standard deviation; Thorium-230/Uranium-238 ratio; Thorium-232; Thorium-232, standard deviation; Uranium; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; Uranium-235, standard deviation; Yanbu-01; Yanbu-02; Yanbu-03; Yanbu-04; Yanbu-05
    Type: Dataset
    Format: text/tab-separated-values, 553 data points
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  • 6
    Publication Date: 2023-05-12
    Keywords: Age, dated; Age, dated standard deviation; Age, Thorium; CHEM; Chemistry; Dadonghai; Hainan Island, China; Sample code/label; Thorium-230/Thorium-232 ratio; Thorium-230/Uranium-238, error, relative; Thorium-230/Uranium-238 ratio; Thorium-232; Uranium; Uranium, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; δ234 Uranium; δ234 Uranium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 45 data points
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  • 7
    Publication Date: 2023-05-12
    Keywords: Calculated; CHEM; Chemistry; Dadonghai; Hainan Island, China; Porites lutea, Strontium/Calcium ratio; Sample code/label; Sea surface temperature, annual mean
    Type: Dataset
    Format: text/tab-separated-values, 7005 data points
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  • 8
    Publication Date: 2023-05-12
    Keywords: Age, 230Thorium; Age, dated; Age, dated standard deviation; Calendar age; Calendar age, standard deviation; DEPTH, sediment/rock; Event label; HAND; Leizhou_reef; Sample code/label; Sampling by hand; Sanya_reef; South China Sea; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230/Uranium-238 activity ratio; Thorium-230/Uranium-238 activity ratio, standard deviation; Uranium; Uranium, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; Youngshu_reef; δ234 Uranium; δ234 Uranium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 420 data points
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  • 9
    Publication Date: 2023-05-12
    Keywords: Age, 14C AMS; Age, 14C calibrated; Age, 14C calibrated, IntCal04 and MARINE04 (Hughen et al. 2004, Reimer 2004); Age, 230Thorium; Age, dated; Age, dated standard deviation; Age, difference; Calculated; DEPTH, sediment/rock; Event label; HAND; Laboratory code/label; Leizhou_reef; Sample code/label; Sampling by hand; Sanya_reef; Size fraction 〉 8 mm, gravel; South China Sea; Species; Youngshu_reef
    Type: Dataset
    Format: text/tab-separated-values, 356 data points
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  • 10
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 27 (1988), S. 3398-3403 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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