Factors controlling typhoons and storm rain on the Korean Peninsula during the Little Ice Age

Katsuki, Kota; Yang, Dong-Yoon; Seto, Kazuto; Yasuhara, Moriaki; Takata, Hiroyuki; Otsuka, M; Nakanishi, Toshimichi; Yoon, Yoonyeol; Um, In-Kwon; Cheung, Richard Ching Wa; Khim, Boo Keun; Kashima, Kaoru

doi:10.1007/s10933-015-9861-3

Cited by 21 publications

(7 citation statements)

References 35 publications

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“…All of these species show similar, almost identical trends, allowing the identification of four distinct EASM strengthened events (Figure ). The C/N ratio (Katsuki et al, ), an indicator of organic matter sources in sediments (i.e., significantly higher values infer larger proportions of terrestrial input; Kaushal & Binford, ; Sampei & Matsumoto, ), shows similar trends to microfossil abundances, supporting our proxy interpretation (Figure f).…”

Section: Discussionsupporting

confidence: 82%

“…(e) Standardized absolute abundance of ostracode species Spinileberis furuyaensis Ishizaki & Kato. (f) Standardized C/N ratio (Katsuki et al, ). Gray bars represent the time interval of proposed low salinity events.…”

Section: Resultsmentioning

confidence: 99%

“…The age model of Core Hw12‐A was initially established based on accelerator mass spectrometry 14 C dates of six plant/bivalve samples. The age model was improved by peak‐to‐peak comparison of Fe content and bulk density between Core Hw‐12A and Core Hw‐12B and is described in detail in Katsuki et al (). The 178‐cm‐long sediment core was sliced and subsampled at 1‐cm‐thick intervals, which were then washed through a 63‐μm‐mesh sieve and oven dried at 40 °C.…”

Section: Methodsmentioning

confidence: 99%

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Decadal‐ to Centennial‐Scale East Asian Summer Monsoon Variability Over the Past Millennium: An Oceanic Perspective

Cheung

Yasuhara

Mamo

et al. 2018

Geophysical Research Letters

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The East Asian summer monsoon (EASM) is a key component of the Asian Monsoon system affecting regional precipitation in East Asia and thus human culture, society, and development. Despite this, decadal‐ to centennial‐scale EASM dynamics remain poorly understood over the last millennium. Here we used high‐resolution benthic microfossil proxies to reconstruct EASM variability for the last 1,000 years from a brackish lake in South Korea. We compared this EASM record with Asian Monsoon proxy records from East China (i.e., continental proxy) and East Asian coasts (i.e., oceanic setting), and identified four pervasive EASM strengthening events at 1250, 1450, 1550, and 1900 CE and their deviation, likely related to land‐ocean temperature gradients. Our results indicate that data from the oceanic setting under the direct influence of the Pacific High are important in understanding the EASM dynamics over the last millennium. It is also noteworthy that EASM variability shows striking similarity to changes in the Atlantic meridional overturning circulation, implying the causal relationship.

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Section: Discussionsupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Decadal‐ to Centennial‐Scale East Asian Summer Monsoon Variability Over the Past Millennium: An Oceanic Perspective

Cheung

Yasuhara

Mamo

et al. 2018

Geophysical Research Letters

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“…This contention does not, however, mean that colder periods are devoid of rip current records. Korean Peninsula suffered from active typhoons was also in colder periods between 1392 and 1903 (Yang 2010;Katsuki et al 2016;Yang et al 2017). There is, nonetheless, an urgent need to have greater knowledge on features of ancient rip current deposits and their depositional modes in view of the present trend of global warming.…”

Section: Discussionmentioning

confidence: 99%

Ancient rip current records and their implications: an example from the Cretaceous Ukra Member, Kutch, India

Sarkar

Koner

2020

J. Palaeogeogr.

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Poorly-sorted conglomerate patches rich in granules or sturdy fossils or both, and reddish mud matrix within the interstices stand out amidst fine-grained siliciclastic shelf sediments of the trangressive systems tract (TST) of the Lower Cretaceous Ukra Member, Kutch Basin, India. The siliciclastic shelf sediments contrast the conglomerates with their remarkable lateral extension. The fossils belong to a low-diversity group of sedentary bivalves that can be traced into the shoreface facies assemblage. The shelf sandstones are almost always sculpted by wave structures, especially hummocky cross-stratification while textures in the conglomerates suggest that the sediment settling was generally from suspensions. Textural variations in conglomerates reflect an immediate variation in flow viscosity prior to the downloading. The current structures obtained from the conglomerates record offshoreward palaeocurrent, in contrast to the shore-parallel palaeocurrent in the TST. The hummocky cross-stratified (HCS) beds are interpreted as seasonal storm deposits, while the conglomerate patches are taken as rip current deposits induced by waves of much longer periods. The glauconite-rich shale that alternates with conglomerates is probable fair-weather products. The conglomerates could not be recognized either in the coarse-grained shoreface deposits occupying the lower part of the overall fining-upward TST or in the coarsening-upward and glauconite-depleted highstand systems tract (HST). In contrast to the TST, the HST is dominantly tide-imprinted, having shore-normal palaeocurrent direction. It appears that intensification of waves and weakening of tides during transgression favored strong rip currents generation, which had presumably caused severe damage to the sea coast and to the shell banks growing preferably at the necks of the rip current channels. Rapid lateral facies transitions in the shoreface deposits at the basal part of the TST suggest enhanced irregularity in the coastline, possibly because of the mega cusps indented upon it. Frequency and intensity of storms enhanced during periods of global warming caused the transgression of the Early Cretaceous Ukra Sea.

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“…れることも多い (例えば, Mackereth, 1958;Kansanen et al, 1991 Kansanen et al, 1991;Reasoner, 1993;Suzuki et al, 2016) ，水深が 10 m 以下の浅い湖の堆積物の採取を目的とする場合，押し込み式と呼ばれるコアラーの方が目的にあう場合が多い (例えば, 佐藤ほか, 2009;Takano et al, 2012;Katsuki et al, 2016 Gilbert and Glew, 1985;Reasoner, 1986Reasoner, , 1993Adachi et al, 2002…”

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Characteristics of Portable Core Samplers for Lake Deposit Investigations

et al. 2019

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A suitable sampling tool is indispensable for making sediment observation. Eleven portable sediment core samplers using lake sediment observations are introduced: two box core samplers, four dropping core samplers, and five pushing core samplers. Some are popular for making sediment observations. However, others are unique and are not well known, although they have excellent characteristics. Their structures, merits, demerits, and suitable lake conditions are explained. Core samplers introduced are: Ekman-Birge grab sampler, Smith-McIntyre grab sampler, Rigo gravity corer, Limnos corer, Knocking corer, Mackereth piston corer, Prototype pushing piston corer, Seto-type undisturbed separable piston corer, Suganuma-type portable percussion piston corer, Multisampler, and Russian Peat sampler.

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Factors controlling typhoons and storm rain on the Korean Peninsula during the Little Ice Age

Abstract: Documenting multi-decadal typhoon and storm-rain variability is useful to prevent future typhoon and flood disasters. We present the history of typhoon and storm-rain activity in East Asia inferred from multi-

Cited by 21 publications

References 35 publications

Decadal‐ to Centennial‐Scale East Asian Summer Monsoon Variability Over the Past Millennium: An Oceanic Perspective

Decadal‐ to Centennial‐Scale East Asian Summer Monsoon Variability Over the Past Millennium: An Oceanic Perspective

Ancient rip current records and their implications: an example from the Cretaceous Ukra Member, Kutch, India

Characteristics of Portable Core Samplers for Lake Deposit Investigations

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