Holocene coastal environmental change and ENSO-driven hydroclimatic variability in East Asia

Lim, Jaesoo; Lee, Jin Young; Hong, Sei–Sun; Park, Sujeong; Lee, Eun-Mi; Yi, Sangheon

doi:10.1016/j.quascirev.2019.07.041

Cited by 25 publications

(36 citation statements)

References 41 publications

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“…yr BP (∼4,750-5,000, ∼5,900-6,000, and ∼7,900-8,000 cal. yr BP; green shaded regions in Supplementary Figure S2), and such ENSO peaks are being considered to be related to high frequency and magnitude of flooding or freshwater input from inland at least in the southern part of the Korean Peninsula (Lim et al, 2017, Lim et al, 2019. However, we did not find any of our magnetic property variability data that could be well correlated to those ENSO peaks (Supplementary Figure S2).…”

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 75%

“…It is generally thought that sedimentation during Holocene at estuaries and coastal lines are sensitive to not only their catchment (terrestrial) environmental changes and extreme hydrologic events such as heavy rainfalls and storms, which are closely associated with regional and global climate changes, but also regional sea-level change (e.g., Lim et al, 2017, Lim et al, 2019. Hence, such estuarine-coastal sediments are of potential use for reconstructing records of paleoenvironmental changes during Holocene.…”

Section: Introductionmentioning

confidence: 99%

“…Along the west coast of South Korea, facing the eastern Yellow Sea, estuaries of large rivers such as the Han, Geum, and Yeongsan Rivers are widely distributed from north to south; these are tide-dominated depositional environments (Chough et al, 2004) forming a variety of deposits during the Late Pleistocene and Holocene (Park et al, 1998;Choi et al, 2003;Lim and Park, 2003;Nahm et al, 2008;Nahm and Hong, 2014;Moon et al, 2018). During the Holocene, these western coastal areas would have experienced dramatic environmental changes due to e.g., sea-level changes such as the Holocene transgression (Stanley and Warne, 1994;Kim and Kennett, 1998), the El Niño Southern Oscillation (ENSO) activity (e.g., Lim et al, 2017;Lu et al, 2018;Lim et al, 2019), the eastern Asian Monsoon (EAM; e.g., Chang, 2004;Dykoski et al, 2005;Selvaraj et al, 2007), and the Holocene climate optimum (HCO; e.g., An et al, 2000;Zhou et al, 2016;Park et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Ahn¹,

Lim

Kim

2021

Front. Earth Sci.

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The sensitivity of magnetic properties, which characterize the mineralogy, concentration, and grain size distribution of magnetic minerals, to environmental processes may provide useful information on paleoenvironmental changes in estuarine environments. Magnetic property studies of estuaries are less common than other environments and, due to the west coast of South Korea having an abundance of estuaries, it provides a good place to study these processes. In this study, we analyzed a variety of magnetic properties based on magnetic susceptibility, hysteresis parameters, progressive acquisition of isothermal remanent magnetization and first-order reversal curve data from a Holocene muddy sediment core recovered from the Yeongsan Estuary on the west coast of South Korea. We examined diagenetic effects on magnetic properties and tested their availability as proxies of paleoenvironmental change. The presence of generally low magnetic susceptibility, ubiquitous greigite-like authigenic magnetic component, and very fine magnetic particle occurrence suggested that the analyzed sediments had undergone considerable early diagenetic alteration. Electron microscopic observations of magnetic minerals support this suggestion. Our results confirm that the use of initial bulk susceptibility as a stand-alone environmental change proxy is not recommended unless it is supported by additional magnetic analyses. We recognized the existence of ferromagnetic-based variabilities related to something besides the adverse diagenetic effects, and have examined possible relationships with sea-level and major climate changes during the Holocene. The most remarkable finding of this study is the two distinct intervals with high values in magnetic coercivity (Bc), coercivity of remanence (Bcr), and ratio of remanent saturation moment to saturation moment (Mrs/Ms) that were well coincident with the respective abrupt decelerations in the rate of sea-level rise occurred at around 8.2 and 7 thousand years ago. It is then inferred that such condition with abrupt drop in sea-level rise rate would be favorable for the abrupt modification of grain size distribution toward more single-domain-like content. We modestly propose consideration of the Bc, Bcr, and Mrs/Ms variability as a potential indicator for the initiation/occurrence of sea-level stillstand/slowstand or highstand during the Holocence, at least at estuarine environments in and around the studied area.

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Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Ahn¹,

Lim

Kim

2021

Front. Earth Sci.

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“…Gradual weakening of EASM intensity was detected from the mid to late Holocene 34 , corresponding to a decrease in Northern Hemisphere summer insolation 35 and enhanced El Niño–Southern Oscillation (ENSO) activity 14 , 36 – 38 . However, the solar forcing 29 and ENSO-driven hydroclimatic variability 18 , 39 during the late Holocene increased the precipitation intensity over the KP, which is located on the East Asian coast.…”

Section: Discussionmentioning

confidence: 99%

“…As the Korean Peninsula (KP), which is located on the East Eurasian continental margin facing the Western Pacific Ocean, is simultaneously affected by both terrestrial and oceanic environmental factors, it has a history of more dynamic climate oscillations than China and Japan 9 – 14 . Therefore, the KP is an ideal site for studies of East Asian monsoon system activity in East Asia.…”

Section: Introductionmentioning

confidence: 99%

Asynchronous multi-decadal time-scale series of biotic and abiotic responses to precipitation during the last 1300 years

Jun

et al. 2020

Sci Rep

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East Asian summer monsoon (EASM)-driven rapid hydroclimatic variation is a crucial factor with major socioeconomic impacts. Nevertheless, decadal- to centennial-scale EASM variability over the last two millennia is still poorly understood. Pollen-based quantitative annual precipitation (PqPann) and annual precipitation reconstructed by artificial neural networks (ANNs) for the period 650–1940 CE were reconstructed from a paleo-reservoir in South Korea. ANNs reconstruction was performed to compensate for a hiatus section. On a decadal timescale, 10 high-precipitation periods were identified, and PqPann and ANNs reconstructions were comparable to local instrumental rainfall and historic drought records. Biotic lags to rapid climatic changes ranging from 25 to 100 years were recognized by asynchronous pollen and speleothem responses to precipitation. We suggest that PqPann-based decadal- to centennial-scale climatic change reconstruction should take biotic lags into account, although the lags can be ignored on the millennial scale. The position of the EASM rainband influenced rainfall magnitude.

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Kalimantan hydroclimate variability since the last glacial period

Hendrizan

Kuhnt

Holbourn

et al. 2022

Int J Earth Sci (Geol Rundsch)

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Changes in convective activity and hydroclimate over Northeastern Kalimantan are key features to understand glacial to interglacial climate evolution in the center of the West Pacific Warm Pool during the Late Pleistocene to Holocene. We use high-resolution X-ray fluorescence (XRF) scanner-derived elemental ratios in sediment Core SO217-18522 (1º 24.106’ N, 119º 4.701’E, 975 m water depth) recovered from the northern Makassar Strait to reconstruct changes in precipitation-related weathering and erosion over Northeastern Kalimantan over the last 50 kyr. Enhanced seasonality of rainfall and an extended dry season during Heinrich Stadials (HS4 to HS1) and the Younger Dryas (YD) suggest weakening of the tropical convection associated with a southward shift of the tropical rain belt and the annual mean position of the Intertropical Tropical Convection Zone. Increasing sediment discharge and intensification of convective activity occurred during the early to mid-Holocene during an interval of high Northern Hemisphere insolation, elevated atmospheric pCO2 levels and global warming. Our reconstructions in comparison with regional terrestrial and marine records highlight the high spatial variability of Kalimantan hydroclimate on millennial to glacial-interglacial timescales.

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Holocene coastal environmental change and ENSO-driven hydroclimatic variability in East Asia

Cited by 25 publications

References 41 publications

Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Asynchronous multi-decadal time-scale series of biotic and abiotic responses to precipitation during the last 1300 years

Kalimantan hydroclimate variability since the last glacial period

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