Discrete episodes of elevated terrestrial runoff during the Carnian climate changes
Li, Huiwen LU ; Huang, Yizhou ; Song, Haijun ; Jia, Enhao ; Cui, Xingqian ; Dal Corso, Jacopo ; Richoz, Sylvain LU
and Luo, Genming
(2026)
In Geochimica et Cosmochimica Acta
417.
p.201-210
- Abstract
The Carnian Pluvial Episode (CPE) was an interval of prominent hydroclimatic perturbations during the early Late Triassic. The causes of these changes have been widely attributed to intensified greenhouse forcing. However, the temporal dynamics of the hydrological cycle across low-latitude regions during the CPE remain poorly constrained. In this study, we present high-resolution organic geochemical data from the Erguan section of the Nanpanjiang Basin (South China) that record three distinct, globally correlated negative excursions in carbonate carbon isotope composition (δ13C). New biomarker data, including synchronous increases in the relative abundance of C30 moretane (relative to its α,β-isomer),... (More)
The Carnian Pluvial Episode (CPE) was an interval of prominent hydroclimatic perturbations during the early Late Triassic. The causes of these changes have been widely attributed to intensified greenhouse forcing. However, the temporal dynamics of the hydrological cycle across low-latitude regions during the CPE remain poorly constrained. In this study, we present high-resolution organic geochemical data from the Erguan section of the Nanpanjiang Basin (South China) that record three distinct, globally correlated negative excursions in carbonate carbon isotope composition (δ13C). New biomarker data, including synchronous increases in the relative abundance of C30 moretane (relative to its α,β-isomer), dibenzofuran-based proxies, and the relative concentration of C29 steranes (C29/C27-29 steranes), document three discrete episodes of enhanced terrestrial organic matter input. Notably, the first pulse aligns with a pronounced negative δ13C excursion, whereas the subsequent two events occurred significantly later, postdating the δ13C shifts. These episodes, coinciding with intervals of increased siliciclastic deposition, were attributed to increased runoff, suggesting dynamic and episodic perturbations of the hydroclimatic regime in eastern Tethys. Collectively, our data reveal a complex interplay between the perturbations in hydrological and carbon cycles during the CPE, providing insight into the dynamics of climate change and its consequences.
(Less)
- author
- Li, Huiwen
LU
; Huang, Yizhou
; Song, Haijun
; Jia, Enhao
; Cui, Xingqian
; Dal Corso, Jacopo
; Richoz, Sylvain
LU
and Luo, Genming
- organization
- publishing date
- 2026-03-15
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Carnian Pluvial Episode, Hydrological cycle, Late Triassic, Lipid biomarkers, Terrestrial organic matter
- in
- Geochimica et Cosmochimica Acta
- volume
- 417
- pages
- 201 - 210
- publisher
- Elsevier
- external identifiers
-
- scopus:105030728134
- ISSN
- 0016-7037
- DOI
- 10.1016/j.gca.2026.01.043
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2026 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
- id
- a5228276-60eb-44eb-9f83-9dab8b39c538
- date added to LUP
- 2026-03-18 09:30:06
- date last changed
- 2026-03-19 10:20:29
@article{a5228276-60eb-44eb-9f83-9dab8b39c538,
abstract = {{<p>The Carnian Pluvial Episode (CPE) was an interval of prominent hydroclimatic perturbations during the early Late Triassic. The causes of these changes have been widely attributed to intensified greenhouse forcing. However, the temporal dynamics of the hydrological cycle across low-latitude regions during the CPE remain poorly constrained. In this study, we present high-resolution organic geochemical data from the Erguan section of the Nanpanjiang Basin (South China) that record three distinct, globally correlated negative excursions in carbonate carbon isotope composition (δ<sup>13</sup>C). New biomarker data, including synchronous increases in the relative abundance of C<sub>30</sub> moretane (relative to its α,β-isomer), dibenzofuran-based proxies, and the relative concentration of C<sub>29</sub> steranes (C<sub>29</sub>/C<sub>27-29</sub> steranes), document three discrete episodes of enhanced terrestrial organic matter input. Notably, the first pulse aligns with a pronounced negative δ<sup>13</sup>C excursion, whereas the subsequent two events occurred significantly later, postdating the δ<sup>13</sup>C shifts. These episodes, coinciding with intervals of increased siliciclastic deposition, were attributed to increased runoff, suggesting dynamic and episodic perturbations of the hydroclimatic regime in eastern Tethys. Collectively, our data reveal a complex interplay between the perturbations in hydrological and carbon cycles during the CPE, providing insight into the dynamics of climate change and its consequences.</p>}},
author = {{Li, Huiwen and Huang, Yizhou and Song, Haijun and Jia, Enhao and Cui, Xingqian and Dal Corso, Jacopo and Richoz, Sylvain and Luo, Genming}},
issn = {{0016-7037}},
keywords = {{Carnian Pluvial Episode; Hydrological cycle; Late Triassic; Lipid biomarkers; Terrestrial organic matter}},
language = {{eng}},
month = {{03}},
pages = {{201--210}},
publisher = {{Elsevier}},
series = {{Geochimica et Cosmochimica Acta}},
title = {{Discrete episodes of elevated terrestrial runoff during the Carnian climate changes}},
url = {{http://dx.doi.org/10.1016/j.gca.2026.01.043}},
doi = {{10.1016/j.gca.2026.01.043}},
volume = {{417}},
year = {{2026}},
}