Late Quaternary variation of lignin composition in core MD01-2421 off central Japan, NW Pacific

Yamamoto, Masanobu; Ichikawa, Yutaka; Igarashi, Yaeko; Oba, Tadamichi

doi:10.1016/j.palaeo.2005.06.021

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…Variation in the S/V ratio in Lake Biwa thus reflects variation in both air temperature 292 and precipitation and suggests a precession-controlled repetition of warmer, drier and 293 cooler, wetter climates. 294 Figure 8B shows the S/V ratios in core BIW08-B and in core MD01-2421 from the 295 northwestern Pacific off central Japan (Yamamoto et al, 2005a). These two records 296 showed good agreement, except in MIS-6 to MIS-5d in MD01-2421 ( Fig.…”

Section: Biwa 250mentioning

confidence: 92%

Response of vegetation in central Japan to precession during the last 147,000 years: A lignin record from Lake Biwa core BIW08-B

Ohira

Yamamoto

Takemura

et al. 2014

Quaternary International

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19To understand the responses of terrestrial vegetation in central Japan to global 20 climate changes, we generated a record of lignin composition from core BIW08-B in 21 Lake Biwa, central Japan, during the last 147,000 years by TMAH-pyrolysis-GC/MS. 22Lignin abundance was intermittently elevated and associated with a high ratio of 23 cinnamyl (C) to vanillyl (V) phenols (C/V ratio) of lignin, suggesting episodic inflows 24 1 of herbaceous plant-derived organic matter into Lake Biwa. The largest inflow occurred 25 during the last deglaciation. Variation in the ratio of syringyl (S) to vanillyl (V) phenols 26 (S/V ratio), which is a contribution index of angiosperms against gymnosperms, showed 27 a precession-like cycle, was consistent with a pollen record from Lake Biwa, and 28 showed a pattern similar to the S/V record from an offshore marine site in the 29 northwestern Pacific. The variation reflected the regional replacement of cool-temperate 30 deciduous broadleaf forests, subalpine conifer forests, and Japanese cedar forests in 31 central Japan caused by the repetition of warmer, dry and cooler, wet climates on a 32 precession cycle. 33 34

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Section: Biwa 250mentioning

confidence: 92%

Response of vegetation in central Japan to precession during the last 147,000 years: A lignin record from Lake Biwa core BIW08-B

Ohira

Yamamoto

Takemura

et al. 2014

Quaternary International

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“…The high sedimentation rate of Core MD01-2421 (average 33 cm ka À1 ) allowed us to achieve a much higher resolution analysis than has been attained previously. The Kashima Core Research Group investigated this core for foraminiferal oxygen isotopes (Oba and Murayama, 2004;Oba et al, 2006), planktonic foraminiferal assemblages (Niimura et al, 2006), the Mg/Ca ratio (Sagawa et al, 2006), diatom assemblages (Koizumi et al, 2004), nannofossil assemblages (Aizawa et al, 2004), U K 0 37 (Yamamoto et al, 2004(Yamamoto et al, , 2005bIsono et al, unpublished data), organic carbon content and isotopes (Ueshima et al, 2006), pollen and spores (Igarashi and Oba, 2006) and lignin (Yamamoto et al, 2005a).…”

Section: Japan Marginmentioning

confidence: 99%

Response of mid‐latitude North Pacific surface temperatures to orbital forcing and linkage to the East Asian summer monsoon and tropical ocean–atmosphere interactions

Yamamoto¹

2009

J Quaternary Science

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Yamamoto, M. 2009. Response of mid-latitude North Pacific surface temperatures to orbital forcing and linkage to the East Asian summer monsoon and tropical oceanatmosphere interactions.ABSTRACT: We present a palaeoceanographic perspective of the North Pacific during the last two glacial cycles based on U K 0 37 -derived palaeotemperature records of IMAGES Core MD01-2421 off the coast of central Japan and cores from the Ocean Drilling Program (ODP) Sites 1014 and 1016 off the coast of California. The sea surface temperature (SST) differences between ODP Sites 1014 and 1016 (DSST northeastern Pacific (NEP) ¼ SST ODP1014 -SST ODP1016 ) indicate the intensity of the California Current. Comparison of DSST NEP and the SST from Core MD01-2421 revealed anti-phase variation; high DSST NEP (indicating weakening of the California Current) corresponded to low SST at the Japan margin (indicating the southward displacement of the north-western Pacific subarctic boundary and weakening of the Kuroshio Extension), and vice versa. This finding suggests that the intensity of the North Pacific subtropical gyre circulation has varied in response to precessional forcing and that this response has been linked with changes in tropical ocean-atmosphere interactions. In the precessional cycle, the SST variation derived from Core MD01-2421 lags ca. 2.5-4 ka behind the variations shown by Hulu and Sanbao stalagmite d 18 O records and by the pollen temperature index from Core MD01-2421, suggesting out-of-phase variations of the North Pacific subtropical gyre circulation and the East Asian summer monsoon. These findings indicate that the behaviour of interactions between tropical oceanatmosphere dynamics and the East Asian summer monsoon may have varied in response to the precessional cycle.

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“…Lignin and fatty acids were analyzed following the methods of Yamamoto et al (2001) and Yamamoto et al (2005) modified after S. Yamamoto (2000), respectively. Pyrolysis gas chromatography mass spectrometry with in situ methylation with tetramethylammonium hydroxide (TMAH-thermochemolysis-GC/MS) was carried out using a Japan Analytical Industry JHP-5 Curie point pyrolyzer that was directly connected to the injection port of a Hewlett Packard 5973 gas chromatograph mass selective detector.…”

Section: Lignin and Fatty Acid Analysismentioning

confidence: 99%

Late Pleistocene variation in lignin and fatty acids from core TKN-2004 in a small mountain basin in central Japan

2014

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We generated a record of lignin and fatty acid compositions from the TK-2004 core in Takano Basin, central Japan, during 39-162 ka by TMAH-thermochemolysis-GC/MS. We tested lignin and fatty acid compositions in the sediments of a small lake (1.88 km 2 watershed) as a paleovegetation proxy to understand the responses of terrestrial vegetation in central Japan to global climate change. Variation in terrestrial organic carbon contents estimated by C/N and ∑8 was parallel to the total organic content (TOC) variation, suggesting that the inflow of terrestrial organic matter was a major factor determining the TOC. The ratio of mid-chain C 20 -C 24 n-fatty acids to short-chain C 14 -C 18 n-fatty acids (MFA/SFA ratio) and the ratio of cinnamyl to vanillyl phenols (C/V ratio) of lignin gradually increased from mid-MIS 6 to early MIS 3. The increase in both parameters suggested increase in the contribution of submerged and floating plants as the flats were expanded in the lake margin. The ratio of syringyl to vanillyl phenols (S/V ratio) corresponded to the pollen vegetation index. This correspondence indicated that the S/V ratio reflected the relative abundance of angiosperms to gymnosperms in the Takano Basin. The consistency of the S/V ratio at the site of core TKN-2004 and the other two locations suggests that the S/V ratio in a small basin is a robust proxy for terrestrial vegetation on a regional scale.

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Late Quaternary variation of lignin composition in core MD01-2421 off central Japan, NW Pacific

Cited by 14 publications

References 22 publications

Response of vegetation in central Japan to precession during the last 147,000 years: A lignin record from Lake Biwa core BIW08-B

Response of vegetation in central Japan to precession during the last 147,000 years: A lignin record from Lake Biwa core BIW08-B

Response of mid‐latitude North Pacific surface temperatures to orbital forcing and linkage to the East Asian summer monsoon and tropical ocean–atmosphere interactions

Late Pleistocene variation in lignin and fatty acids from core TKN-2004 in a small mountain basin in central Japan

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