Back to Search Start Over

The magnitude and potential of the sedimentary carbon sink in the Eastern China Marginal Seas.

The magnitude and potential of the sedimentary carbon sink in the Eastern China Marginal Seas.

Authors :
Liu, Yixuan
Xiao, Xiaotong
Gao, Wenxian
Fan, Ying
Tao, Shuqin
Ding, Yang
Zhao, Meixun
Source :
Palaeogeography, Palaeoclimatology, Palaeoecology. Dec2024, Vol. 655, pN.PAG-N.PAG. 1p.
Publication Year :
2024

Abstract

Marginal sea sediments offer one of the most stable and critical carbon repositories of sequestered organic carbon (OC). Quantification of the magnitude and the potential of OC sequestration in marginal sea sediments could provide data supporting the formulation of coastal carbon management strategies in the future. Nonetheless, controversies and difficulties still exist given the lack of integrity on statistical data, the incomplete understanding of the complex OC sources and the dynamic processes in the marginal seas. This work presents a systematic and holistic analysis of the OC stock and carbon stock accumulation rate (CSAR) in surface sediments (0–5 cm) of the Eastern China Marginal Seas (ECMS). The estimated total OC stock in the top 5 cm sediments in the ECMS (9.57 × 105 km2) was 201.48 ± 15.98 Tg and the sequestration rate was 24.24 ± 9.93 Tg per year. Because only the preservation of fresh terrestrial OC and the marine OC is regarded as a valid CO 2 sink on modern timescale, we further elucidated the magnitude and the potential of the valid OC stocks and CSAR with different sources and ages based on the δ13C and Δ14C. This study quantifies high resolution OC stock and CSAR and presents the magnitude and potential of the valid sedimentary carbon sink in the ECMS. • The total OC stock of the Eastern China Marginal Seas (ECMS) was 201.48 ± 15.98 Tg. • The total CSAR in the ECMS was estimated as 24.24 ± 9.93 Tg yr−1. • The sources and ages of OC stock and CSAR were distinguished basing δ13C and Δ14C. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00310182
Volume :
655
Database :
Academic Search Index
Journal :
Palaeogeography, Palaeoclimatology, Palaeoecology
Publication Type :
Academic Journal
Accession number :
180727887
Full Text :
https://doi.org/10.1016/j.palaeo.2024.112482