IOCAS-IR  > 海洋地质与环境重点实验室
Influences of tropical monsoon climatology on the delivery and dispersal of organic carbon over the Upper Gulf of Thailand
Wu, Bin1,2; Wu, Xiaodan2,3; Shi, Xuefa1,2; Qiao, Shuqing1,2; Liu, Shengfa1,2; Hu, Limin1,2; Liu, Jihua1,2; Bai, Yazhi1,2; Zhu, Aimei1,2; Kornkanitnan, Narumol4; Khokiattiwong, Somkiat4
2020-08-01
Source PublicationMARINE GEOLOGY
ISSN0025-3227
Volume426Pages:14
AbstractOrganic carbon cycling in SE Asia is data-sparse and poorly studied, although high sediment yield and organic carbon intensity occur in the tropical region. In the present study, we evaluated the role of tropical monsoon pertaining to fluvial discharge, sediment load, coastal current and water stratification on seasonal organic carbon dynamics during four sampling campaigns in the Upper Gulf of Thailand (UGoT). This study demonstrates that particulate organic carbon (POC) is closely correlated with the river influx of suspended sediment, which is generally regulated by the local rainfall. Higher POC is found near the large estuarine section (Chao Phraya River, CHAO) during southwest monsoon period and the small estuarine section (Mae Klong River, MK) during November 2013 when tropical cyclones impacted. POC in the estuarine sections is more significantly influenced by the seasonal shift compared with the coastal sections. Land-derived organic matter prevails in the small estuarine and coastal sections, while marine-derived organic matter dominates in the estuarine sections impacted by CHAO and MK. Anthropogenic inputs and dam regulation also influences the river export of organic matter during the high precipitation periods. Total organic carbon (TOC) however displays less significant seasonal monsoon variations than POC. Further, TOC tends to accumulate in the sub-silt fraction of sediments, which mainly occurs in the small estuarine and eastern coastal sections and is more obviously influenced by marine-derived factors. TOC in sediment of the CHAO and MK influenced sections however displays more seasonal variations with prevailing river input evidenced by coarser sediment and higher C/N ratios. Moreover, the almost year round water stratification across the region acts as the barrier in retaining organic carbon in the estuaries and their vicinities from dispersal into the lower portion of Gulf of Thailand. High sedimentation rate (similar to 1.1 cm.yr(-1)) further facilitates the organic carbon burial in the study area. The delivery, dispersal and burial of organic carbon are closely associated with the climate-controlled precipitation, and thus the tropical monsoon climatology under the global warming in particular is an important factor influencing the organic carbon in the UGoT.
KeywordOrganic carbon Monsoon climatology Fluvial discharge Water stratification Upper Gulf of Thailand
DOI10.1016/j.margeo.2020.106209
Indexed BySCI
Language英语
Funding ProjectNational Programme on Global Change and Air-Sea Interaction[GASI-02-IND-CJ05] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-03] ; Natural Science Foundation of China[U1606401] ; Natural Science Foundation of China[41722603] ; Qingdao National Laboratory for Marine Science and Technology[2016ASKJ13] ; China-Thailand Cooperation Project Research on Vulnerability of Coastal Zones ; Taishan Scholar Program of Shandong
WOS Research AreaGeology ; Oceanography
WOS SubjectGeosciences, Multidisciplinary ; Oceanography
WOS IDWOS:000540488000009
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/167685
Collection海洋地质与环境重点实验室
Corresponding AuthorShi, Xuefa
Affiliation1.Minist Nat Resources, Key Lab Marine Geol & Metallogeny, Inst Oceanog 1, Qingdao 266061, Peoples R China
2.Qingdao Natl Oceanog Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
4.Marine & Coastal Resources Res & Dev Inst, Dept Marine & Coastal Resources, Bangkok 10210, Thailand
Recommended Citation
GB/T 7714
Wu, Bin,Wu, Xiaodan,Shi, Xuefa,et al. Influences of tropical monsoon climatology on the delivery and dispersal of organic carbon over the Upper Gulf of Thailand[J]. MARINE GEOLOGY,2020,426:14.
APA Wu, Bin.,Wu, Xiaodan.,Shi, Xuefa.,Qiao, Shuqing.,Liu, Shengfa.,...&Khokiattiwong, Somkiat.(2020).Influences of tropical monsoon climatology on the delivery and dispersal of organic carbon over the Upper Gulf of Thailand.MARINE GEOLOGY,426,14.
MLA Wu, Bin,et al."Influences of tropical monsoon climatology on the delivery and dispersal of organic carbon over the Upper Gulf of Thailand".MARINE GEOLOGY 426(2020):14.
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