Holocene seasonal environmental trends at Tokyo Bay, Japan, reconstructed from bivalve mollusk shells—implications for changes in the East Asian monsoon and latitudinal shifts of the Polar Front

Schöne, Bernd R.; Oschmann, Wolfgang; Tanabe, Kazushige; Dettman, David L.; Fiebig, Jens; Houk, Stephen D.; Kanie, Yasumitsu

doi:10.1016/j.quascirev.2003.10.013

Cited by 31 publications

(18 citation statements)

References 35 publications

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“…4d, S1). A similar pattern is seen in by records from the Korean peninsula (Fujiki and Yasuda, 2004;Nahm et al, 2006) and in marine records from the East China Sea (Li et al, 1997) and the Japan Sea (Jian et al, 2000;Schöne et al, 2004). Thus, after spatial-temporal analyses, the two primary signals revealed in PCA analysis over the whole region can be interpreted as indices of the Asian Summer Monsoon subsystems with PC1 indicating the Indian Summer Monsoon and PC2 the East Asian Summer Monsoon.…”

Section: The Asynchronous Nature Of the Asian Monsoonal Subsystems: Psupporting

confidence: 69%

“…Maximum moisture levels in southeast China were attained during the mid-Holocene which is explained by the 'southward moving Holocene Optimum Period' hypothesis outlined by An et al (2000) despite the potential uncertainty raised from their low resolution records. However maximum moisture levels during the mid-Holocene were also recorded in Korea (Fujiki and Yasuda, 2004;Nahm et al, 2006), Japan (Schöne et al, 2004) and the East China Sea area (Li et al, 1997). In contrast, decreasing moisture levels were recorded in northern India, southwest China and in other terrestrial archives from the Indian Summer Monsoonal area such as the stalagmite records (Fleitmann et al, 2003;Dykoski et al, 2005;Fleitmann et al, 2007;etc.…”

mentioning

confidence: 99%

“…During the mid-Holocene (7-4 cal. kyr BP), the ISM began to retreat due to a decrease in solar insolation, that resulted in a weakening of the suppressing effects over EASM areas allowing an enhancement of the EASM leading to a moisture maximum not only in north-central China (Liu et al, 2001;Shao et al, 2006;Cosford et al, 2008;Hu et al, 2008), but also in Korea, Japan and the East China Sea area (Li et al, 1997;Fujiki and Yasuda, 2004;Schöne et al, 2004;Nahm et al, 2006). Since this time, under the influence of a further decrease in Northern Hemisphere insolation, both ASM subsystems developed towards modern conditions.…”

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confidence: 99%

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Asynchronous evolution of the Indian and East Asian Summer Monsoon indicated by Holocene moisture patterns in monsoonal central Asia

Wang

Liu

Herzschuh

2010

Earth-Science Reviews

298

111

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a b s t r a c t a r t i c l e i n f oThe numerical meta-analysis of 92 proxy records (72 sites) of moisture and/or temperature change confirms earlier findings that the dominant trends of climatic evolution in monsoonal central Asia since the Last Glacial roughly parallel changes in Northern Hemisphere summer insolation, i.e. the period following the Last Glacial Maximum was characterized by dry and cold conditions until 15 cal. kyr BP, followed by a warm, wet period coincident with the Bølling/Allerød warm period and terminated by a cold, dry reversal during the Younger Dryas period. After an abrupt increase at the start of the Holocene, warm and wet conditions prevailed until ca. 4 cal. kyr BP when moisture levels and temperatures started to decrease. Ordination of moisture records reveals strong spatial heterogeneity in moisture evolution during the last 10 cal. kyr. The Indian Summer Monsoon (ISM) areas (northern India, Tibetan Plateau and southwest China) exhibit maximum wet conditions during the early Holocene, while many records from the area of the East Asian Summer Monsoon indicate relatively dry conditions, especially in north-central China where the maximum moisture levels occurred during the mid-Holocene. We assign such phenomena to strengthened Hadley Circulation centered over the Tibetan Plateau during the early Holocene which resulted in subsidence in the East Asian monsoonal regions leading to relatively dry conditions. Our observations of the asynchronous nature of the two Asian monsoon subsystems on millennial time scales have also been observed on annual time-scales as well as implied through the spatial analysis of vertical air motion patterns after strong ascending airflows over the Tibetan Plateau area that were calculated from NCEP/NCAR reanalysis data for the last 30 years. Analogous with the early Holocene, the enhancement of the ISM in a 'future warming world' will result in an increase in the asynchronous nature of the monsoon subsystems; this trend is already observed in the meteorological data from the last 15 years.

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Section: The Asynchronous Nature Of the Asian Monsoonal Subsystems: Psupporting

confidence: 69%

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confidence: 99%

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confidence: 99%

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Asynchronous evolution of the Indian and East Asian Summer Monsoon indicated by Holocene moisture patterns in monsoonal central Asia

Wang

Liu

Herzschuh

2010

Earth-Science Reviews

298

111

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“…With counting the number of annual growth lines and daily growth lines within an annual increment, growth rate and longevity of the individual and even the number of days within a year have been discussed (e.g. Wells 1963;Buddemeier et al 1974;Jones and Quitmyer 1996;Schöne et al 2004). However, very unfortunately, no apparent annual growth line has been observed on ammonoid shells.…”

Section: Growth Ratementioning

confidence: 99%

Isotope Signature of Ammonoid Shells

Moriya

2015

Topics in Geobiology

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From the middle Paleozoic to the end of Mesozoic, ammonoids represent one of the major constituents of macro-organisms that are preserved as fossils in the epicontinental seas. Their rich fossil records and remarkable diversification of shell forms in space and time indicate that ammonoids are one of the best examples for understanding relationships between evolution of marine biota and changes in paleoenvironment and/or paleoceanography. The biotic and abiotic components in the ancient ocean are, obviously, closely connected through the chemical cycles and energy flow in the ancient eco-system. Therefore, for understanding the cause and/or effect of diversity change or extinction events in the ancient earth-and eco-system, identifying ecological niche, such as habitat, food habit, life history strategy, etc., of ammonoid species is extremely important.The mode of life of ammonoids has hitherto been investigated based mainly on functional morphology of their shells, as well as synpaleoecological analyses of fossil assemblages. The previous approaches on the basis of functional morphology are roughly divided into three aspects; (1) buoyancy of the animal including both a shell and a supposed soft part, (2) swimming and mobility and (3) depth habitat.Many workers (Trueman 1941;Heptonstall 1970;Ebel 1983;Saunders and Swan 1984;Saunders and Shapiro 1986;Ebel 1992;Shigeta 1993; and others) calculated density of living ammonoids based on shell thickness, volume ratio between a phragmocone and a body chamber, and the estimated density of the hypothetized soft part. Although there are some ambiguities, such as accuracy of shell thickness calculations based on theoretical models, quantity of cameral liquid in the phragmocone and the supposed soft part density, most previous studies, excluding Ebel (1983Ebel ( , 1992 and Shigeta (1993), estimated that living ammonoids had a density

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“…Gagan et al, 2000 and references within)) has proved difficult, but recent work has shown that mollusc shells have significant potential as an archive of seasonalresolution SST at mid to high latitudes (e.g. Carré et al, 2005;Jones et al, 2005;Schöne et al, 2004). The δ 18 O of marine mollusc shells is a function both of seawater temperature and of seawater δ 18 O (O'Neil et al, 1969).…”

Section: Introductionmentioning

confidence: 99%

Increased seasonality in the Western Mediterranean during the last glacial from limpet shell geochemistry

Ferguson

Henderson

et al. 2011

Earth and Planetary Science Letters

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Editor: P. DeMenocalKeywords: mollusc seasonality Gibraltar palaeoclimate oxygen isotopesThe seasonal cycle is a fundamental aspect of climate, with a significant influence on mean climate and on human societies. Assessing seasonality in different climate states is therefore important but, outside the tropics, very few palaeoclimate records with seasonal resolution exist and there are currently no glacial-age seasonal-resolution sea-surface-temperature (SST) records at mid to high latitudes. Here we show that both Mg/Ca and oxygen isotope (δ 18 O) ratios in modern limpet (Patella) shells record the seasonal range of SST in the western Mediterranean -a region particularly susceptible to seasonal change. Analysis of a suite of fossil limpet shells from Gibraltar shows that SST seasonality was greater during the last glacial by~2°C as a result of greater winter cooling. These extra-tropical seasonal-resolution SST records for the last glacial suggest that the presence of large ice-sheets in the northern hemisphere enhances winter cooling. This result also indicates that seasonality in the Mediterranean is not well-represented in most palaeoclimate models, which typically show little change in seasonal amplitude, and provides a new test for the accuracy of climate models.

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Holocene seasonal environmental trends at Tokyo Bay, Japan, reconstructed from bivalve mollusk shells—implications for changes in the East Asian monsoon and latitudinal shifts of the Polar Front

Cited by 31 publications

References 35 publications

Asynchronous evolution of the Indian and East Asian Summer Monsoon indicated by Holocene moisture patterns in monsoonal central Asia

Asynchronous evolution of the Indian and East Asian Summer Monsoon indicated by Holocene moisture patterns in monsoonal central Asia

Isotope Signature of Ammonoid Shells

Increased seasonality in the Western Mediterranean during the last glacial from limpet shell geochemistry

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