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

IF 2.6 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology Pub Date : 2024-09-04 DOI:10.1016/j.palaeo.2024.112482

Yixuan Liu , Xiaotong Xiao , Wenxian Gao , Ying Fan , Shuqin Tao , Yang Ding , Meixun Zhao

{"title":"The magnitude and potential of the sedimentary carbon sink in the Eastern China Marginal Seas","authors":"Yixuan Liu , Xiaotong Xiao , Wenxian Gao , Ying Fan , Shuqin Tao , Yang Ding , Meixun Zhao","doi":"10.1016/j.palaeo.2024.112482","DOIUrl":null,"url":null,"abstract":"<div>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 CO2 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.</div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"655 ","pages":"Article 112482"},"PeriodicalIF":2.6000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0031018224004711/pdfft?md5=d01f98ebcd4d534eca5d329e3b6d998c&pid=1-s2.0-S0031018224004711-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Palaeogeography, Palaeoclimatology, Palaeoecology","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0031018224004711","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

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 CO₂ 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.

查看原文本刊更多论文

中国东部边缘海沉积碳汇的规模和潜力

边缘海沉积物是固碳有机碳（OC）最稳定和最重要的碳库之一。对边缘海沉积物固碳量和固碳潜力的量化，可以为未来制定沿海碳管理战略提供数据支持。然而，由于统计数据缺乏完整性，对边缘海复杂的 OC 来源和动态过程的了解不全面，因此仍然存在争议和困难。本研究对中国东部边缘海（ECMS）表层沉积物（0-5 厘米）中的 OC 储量和碳储量累积率（CSAR）进行了系统和全面的分析。中国东部边缘海（9.57 × 105 km2）表层 5 cm 沉积物中 OC 总储量为 201.48 ± 15.98 Tg，固碳率为 24.24 ± 9.93 Tg/年。由于在现代尺度上只有保存的新鲜陆地 OC 和海洋 OC 被认为是有效的 CO2 汇，我们根据 δ13C 和 Δ14C 进一步阐明了不同来源和年龄的有效 OC 储量和 CSAR 的规模和潜力。本研究对高分辨率 OC 储量和 CSAR 进行了量化，并提出了 ECMS 有效沉积碳汇的规模和潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Palaeogeography, Palaeoclimatology, Palaeoecology 地学-地球科学综合

CiteScore

5.90

自引率

10.00%

发文量

398

审稿时长

3.8 months

期刊介绍： Palaeogeography, Palaeoclimatology, Palaeoecology is an international medium for the publication of high quality and multidisciplinary, original studies and comprehensive reviews in the field of palaeo-environmental geology. The journal aims at bringing together data with global implications from research in the many different disciplines involved in palaeo-environmental investigations. By cutting across the boundaries of established sciences, it provides an interdisciplinary forum where issues of general interest can be discussed.