Abstract
High-resolution foraminiferal isotopic records obtained from cores fromthe East China Sea and Japan Sea reveal a pattern of contrasting hydrographies for the last 6000 years.The first core,retrieved from the uppercontinental slope of the East China Sea,was analyzed for δ^(18)O and δ^(13)Cin both Neogloboquadrina dutertrei(planktonic)and Uvigerina spp.(benthic)foraminifera and,hence,provides a record of paleoceanographic changethrough time.The relatively reduced amplitude of the planktonic δ^(18)O signal relative to the benthic samples suggests some modification resulting fromchanges in the prevailing Kuroshio Current.A progressive depletion in boththe δ^(18)O and δ^(13)C records of N.dutertrei over the last 2000 years suggestsa warmer,more humid climate around the East China Sea.Isotopic recordsof the second core collected from the Japan Sea show a comparable temporalresolution to those from the East China Sea,but they exhibit larger amplitudes presumably due to the more restricted hydrographic setting and greatersensitivity to environmental changes in that area.In addition to the temperature differences revealed by oxygen isotopes,the N.dutertrei δ^(13)C recordsfor these two cores also provide clues as to the evolution of the KuroshioCurrent during the late Holocene.
Highlights
In Part 1 of this paper (Lin et al 1996), we presented additional observational evidence to support the conceptual model of the prefrontal rainband associated with the Mei-Yu front during TAMEX IOP 13 (Taiwan Area Mesoscale Experiment Intensive Observing Period 13) described in Lin et al ( 1992)
The goal of this study is to provide additional support for the conceptual model of a prefrontal rainband in IOP 13 put forth by Lin et al ( 1992), in the fonn of the ti1ne dependent kinematic structure of the Mei-Yu front and the associated prefrontal rainband
The second important feature is a dry layer above 6 km, as shown by the low reflectivities, overlaying the Mei-Yu front and the associated prefrontal rainband
Summary
In Part 1 of this paper (Lin et al 1996), we presented additional observational evidence to support the conceptual model of the prefrontal rainband associated with the Mei-Yu front during TAMEX IOP 13 (Taiwan Area Mesoscale Experiment Intensive Observing Period 13) described in Lin et al ( 1992) . Lin et al ( 1992) proposed that the Mei -Yu front played an important role _in the initiation and maintenance of the rainband at the start of the rainband'sT.4..0, Vol 7, No., June 1996 life. The southwest portion of the- Mei-Yu front (about 50 to 60 km west of the Tai\van coast) continued to lift the moisture-rich air in the southwest monsoon flow to create new convective cells. These convective cells traveled east following the westerly flow at low levels. These cells merged with the older cells in the rainband near the west coast, thereby prolonging the life of the rainband
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