Citation:

PANGAEA.959221

Name: Geochemical and sedimentological record of sediment core ETL-C3 retrieved from Ea Tyn Lake (Central Highlands, Vietnam)
Published: 2023-05-30
License: https://creativecommons.org/licenses/by/4.0/
Keywords: drought; Geochemistry; Lake sediment core; Late Holocene; Monsoon; palaeoclimate; Southeast Asia; XRF

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Published: 2023-05-30 • DOI registered: 2023-06-28

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Abstract:

In March 2020, two parallel sediment cores ETL-C3 and ETL-C4 (12.38589°N, 107.95399°E) were recovered from Ea Tyn Lake (Vietnam) using a Livingston/Bolivia-style customized piston corer. The cores represent sequences of 1-m segments with a vertical offset of ~50 cm between cores to ensure a complete record without gaps between successive segments. The two cores were visually correlated based on marker layers producing an ETL master sequence with a total length of 877 cm (sedimentary units 1-14). The core was scanned at 1 cm resolution with an Avaatech X-ray Fluorescence (XRF) core scanner and the raw data presented here is displayed as element counts per second (cps). RGB colour values were taken with a digital line scan camera to depict colour variation with depth. RGB colors were tranformed into the CIELAB color space using convertColor in the R-package grDevices. Principal component analysis (PCA) was performed using the basic-R function prcomp. The chronology is based on 12 AMS radiocarbon (14C) dates derived from plant macrofossils and measured at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. The age-depth-model was produced based on the 12 14C dates and 4 137Cs dates using the R-package rbacon. The core sequence covers the last 1250 years cal BP and reflects long-term monsoon variability (Rb/Sr ratio) and drought events (PC2) in the throughout the respective time window of the core.

Keyword(s):

drought; Geochemistry; Lake sediment core; Late Holocene; Monsoon; palaeoclimate; Southeast Asia; XRF

Related to:

Nguyễn-Đình, Thái; Nguyễn-Thùy, Dương; Nguyễn-Văn, Hướng; Ojala, Antti E K; Đỗ-Trọng, Quốc; Phan-Thanh, Tùng; Nguyễn Thị, Hồng; Nguyễn, Nguyệt Thị Ánh; Xuân Đinh, Thành; Thị Huyền Nguyễn, Trang; Sauer, Peter E; Schimmelmann, Arndt; Unkel, Ingmar (2022): A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam. The Holocene, 32(10), 1026-1040, https://doi.org/10.1177/09596836221106967

Funding:

Vietnam National University, Hanoi, grant/award no. QG.20.11 : Holocene paleoclimate recorded from lake sediment in the south of Central Highlands

Coverage:

Latitude: 12.385890 * Longitude: 107.953990

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

3 datasets

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Datasets listed in this bundled publication

Unkel, I; Nguyễn-Đình, T; Nguyễn-Thùy, D et al. (2023): 14C dates and 137Cs dates of sediment core ETL-C3 from Ea Tyn Lake, Central Highlands, Vietnam. https://doi.org/10.1594/PANGAEA.959133
Unkel, I; Nguyễn-Đình, T; Nguyễn-Thùy, D et al. (2023): Principal component analysis (PCA) of sediment core ETL-C3 and ETL-C4 from Ea Tyn Lake, Central Highlands, Vietnam. https://doi.org/10.1594/PANGAEA.959212
Unkel, I; Nguyễn-Đình, T; Nguyễn-Thùy, D et al. (2023): X-ray fluorescence (XRF) element data of sediment core ETL-C3 and ETL-C4 from Ea Tyn Lake, Central Highlands, Vietnam. https://doi.org/10.1594/PANGAEA.959216