Sea surface temperature record from the north of the East China Sea since late Holocene
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Using the alkenone paleotemperature index U 37 k , a high-resolution sea surface temperature (SST) record since 3600 a BP was reconstructed from the mud area in the north of the East China Sea. Combining with the grain size distribution curve of sensitive grain size group, which may reflect the East Asia Winter Monsoon activity, the palaeoenvironmental evolution cycle throughout the late Holocene in the area was obtained. The marine environment evolution during the last 3600 years displays a five-stage trend. (1) Temperature descending period from 0.85 cal. ka BP to present. The maximum temperature decrease amplitude is 2°C. The winter monsoon intensified and ‘Little Ice Age’ were recorded in this period. (2) Warming period from 1.90 to 0.85 cal. ka BP. The mean temperature increase amplitude is 0.8°C. The Sui-Tang warming period was recorded at about 0.85–1.35 cal. ka BP and a prominent cooling event was recorded at 1.4 cal. ka BP in this period. (3) Temperature descending period from 2.55 to 1.90 cal. ka BP. Temperature cooling amplitude is 0.9°C. This period is coincident with an integrated temperature circle recorded in the Antarctic ice core, with the temperature changes from a slow cooling stage to a rapid warming stage. (4) Temperature comparatively stable with a little ascending period from 3.2 to 2.55 cal. ka BP. Temperature warming amplitude is 0.3°C. This period is coincident with the temperature fluctuant ascending period recorded in Antarctic ice core. (5) Temperature comparatively stable with little descending period from 3.6 to 3.2 cal. ka BP. This period corresponds with the temperature fluctuant cooling period recorded in Antarctic ice core. Basically, those five periods were coincident with the Antarctic ice core record. During the global cooling stage, the SST change in the continental shelf sea can be adjusted simultaneously.
Keywordsnorth of the East China Sea mud area U37k SST global change
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- 1.Li G X, Yang Z G, Liu Y. Environmental Study of Submarine Sediments of East China Sea Area (in Chinese). Beijing: Science Press, 2005. 1–80Google Scholar
- 3.Sun Y B, Gao S, Li J. Primary analysis on the sensitive grain-size of terrigenous sediment to environments in maginal sea (in Chinese). Chinese Sci Bull, 2003, 48: 83–87Google Scholar
- 4.Xiao S B, Li A C, Jiang F Q, et al. Recent 2000-year geological records of mud in the inner shelf of the East China Sea and their climatic implications. Chinese Sci Bull, 2005, 50: 466–471Google Scholar
- 9.Volkman J K, Eglinton G, Corner E D S, et al. Novel unsaturated straight-chain C37-C39 methyl and ethyl ketones in marine sediments and a coccolithophore Emiliania huxleyi In Douglas. Adv Org Geochem. Oxford: Pergamon Press, 1980. 219–228Google Scholar
- 11.Stuiver M, Reimer P J, Bard E, et al. INTCAL 98 radiocarbon age calibration, 24000-0 cal. a BP. Radiocarbon, 1998, 40: 1041–1083Google Scholar
- 18.Sun X Y, Li G X, Liu Y, et al. Response of environmental sensitive grain size group in core FJ04 from mud area in the north of East China Sea to East Asian winter monsoon evolvement (in Chinese). Mar Geol Quat Geol, 2008, 28: 11–17Google Scholar
- 19.Zhu K Z. Primary study on climatic change over the past 5000 a (in Chinese). Sci China Ser A-Math, 1973, 2: 168–189Google Scholar
- 23.Yang Y, Yuan D X, Cheng H, et al. Paleoclimate record meaning of initial 234U/238U value changing (in Chinese). Acta Geol Sin, 2008, 82: 692–701Google Scholar
- 25.Yao T D, Thompson L G. Temperature variation over the past 5000a from the record of Dunde ice core (in Chinese). Sci China Ser D-Earth Sci, 1992, 10: 1089–1093Google Scholar
- 26.Liu X Q, Shen J, Wang S M, et al. A 16000-Year Paleoclimatic Record Derived from Authigenetic Carbonate of Lacustrine Sediment in Qinghai Lake (in Chinese). Geol J China Univ, 2003, 9: 38–46Google Scholar