Carbon pools and fluxes in the China Seas and adjacent oceans

Jiao, Nianzhi; Liang, Yantao; Zhang, Yongyu; Liu, Jihua; Zhang, Yao; Zhang, Rui; Zhao, Meixun; Dai, Minhan; Zhai, Weidong; Gao, Kunshan; Song, Jinming; Yuan, Dongliang; Li, Chao; Lin, Guanghui; Huang, Xiaoping; Yan, Haike; Hu, Limin; Wang, Long; Cao, Chunjie; Luo, Yawei; Luo, Tingwei; Wang, Nannan; Dang, Hongyue; Wang, Dongxiao; Zhang, Si

doi:10.1007/s11430-018-9190-x

Cited by 66 publications

(42 citation statements)

References 172 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that our estimate of total OC burial flux in the ECMS was lower than estimated by Jiao et al. (2018) (∼13 Mt OC yr −1 ). These differences are likely because their estimate not only covers mud areas, but also covers sand areas (more than 4 times larger than mud areas) (Jiao et al., 2018).…”

Section: Discussioncontrasting

confidence: 86%

“…Similarly, total terrestrial OC burial flux in mud areas of the ECMS accounted for ∼4.7 ± 0.5% of global OC burial, further supporting that mud areas of the ECMS are important terrestrial OC sinks (Table 2). It should be noted that our estimate of total OC burial flux in the ECMS was lower than estimated by Jiao et al (2018) (∼13 Mt OC yr −1 ). These differences are likely because their estimate not only covers mud areas, but also covers sand areas (more than 4 times larger than mud areas) (Jiao et al, 2018).…”

Section: Burial Efficiencies Of Oc In Different Mud Areas Of the Ecmscontrasting

confidence: 79%

See 1 more Smart Citation

Controls on Organic Carbon Burial in the Eastern China Marginal Seas: A Regional Synthesis

Zhao

Yao

Bianchi

et al. 2021

Global Biogeochemical Cycles

View full text Add to dashboard Cite

Marginal seas are important burial centers of both marine and terrestrial organic carbon (OC), accounting for the burial of more than 90% of sedimentary OC in marine environments Burdige, 2005;Hedges & Keil, 1995). These marginal seas receive vast amounts of sediments, freshwater, and nutrients from their adjacent rivers and coastal erosion, especially in those large delta-front estuaries (Bianchi & Allison, 2009;Kuehl et al., 2020). Large seasonal shifts of terrigenous inputs impact sedimentation rates, sources/age of OC, and primary productivity -all critical in controlling burial and decomposition of OC in marginal seas (Bauer et al., 2013;Bianchi et al., 2014;Liu et al., 2010). Recent work on differentiation of rock-derived or petrogenic OC (OC petro ) from physical erosion of bedrock in river drainage basins Abstract A regional synthesis of organic carbon (OC) burial was conducted using a comprehensive data set to reveal some of the key drivers and human multi-stressors controlling OC burial and transport in the Eastern China Marginal Seas (ECMS). Both OC and Δ 14 C values of suspended particulate matter (SPM) in the Changjiang River, were significantly higher than estuarine mobile-muds, suggesting selective decay of more labile younger OC from both marine and terrestrial sources and the accumulation of more recalcitrant older OC. Some of this decay is likely to be associated with iron-redox cycling in mobile-muds. In contrast, OC, δ 13 C, and Δ 14 C values increased along the Yellow River sediment dispersal pathway, indicating adding of young marine OC and less decay of terrestrial OC. OC burial efficiency in mud areas in the Bohai Sea (∼43%) was significantly higher than those in the Yellow (∼11%) and East China Seas (∼16%), owing to rapid deposition. Burial flux of biospheric OC in mud areas of the ECMS is 7.00 ± 0.79 Mt yr −1 , corresponding to atmospheric CO 2 drawdown by silicate weathering in major river drainage basins of mainland China. The burial flux of petrogenic OC was estimated to be 0.81 ± 0.25 Mt yr −1 , accounting for >1.9% of total burial in the global ocean. While the ECMS is an important OC sink, river damming has greatly reduced OC burial. Thus, the overall impact on anthropogenically altered riverdominated marginal seas remains an important and rapidly changing component of the coastal ocean carbon budget.Plain Language Summary A comprehensive regional synthesis of organic carbon (OC) burial and its drivers, were investigated across the Eastern China Marginal Seas (ECMS). Variation of OC content and carbon isotopic composition from suspended particulate matter to mobile muds, in Changjiang sediment dispersal pathways, indicated selective decomposition of younger more labile marine and terrestrial OC, which resulted in the accumulation of older more recalcitrant OC. However, continuous adding of young marine OC, with little loss of terrestrial OC, in Yellow River sediment dispersal pathway, resulted in more recalcitrant terrestrial OC buried in this relatively more quiescent sedimentary ...

show abstract

Section: Discussioncontrasting

confidence: 86%

Section: Burial Efficiencies Of Oc In Different Mud Areas Of the Ecmscontrasting

confidence: 79%

Controls on Organic Carbon Burial in the Eastern China Marginal Seas: A Regional Synthesis

Zhao

Yao

Bianchi

et al. 2021

Global Biogeochemical Cycles

View full text Add to dashboard Cite

show abstract

“…However, large amounts of VCHs have been destroyed during the rapid economic development of China during the past 70 years, and this has ultimately reduced their extents and diversities (Zhou et al., 2016). Although several studies have estimated soil OC stocks in Chinese VCHs (Jiao et al., 2018; Liu et al., 2014; Meng et al., 2019), reliable estimates of soil OC stocks and losses are still unavailable for much of this large and dynamic region. China is the largest CO 2 emitter in the world and is a nation with a large population at risk from sea‐level rise (SLR) and cyclones (Neumann et al., 2015), and would benefit from blue carbon strategies for climate change mitigation and adaptation, which require the quantification of OC stocks and losses of VCHs.…”

Section: Introductionmentioning

confidence: 99%

Stocks and losses of soil organic carbon from Chinese vegetated coastal habitats

Zeng

et al. 2020

Global Change Biology

View full text Add to dashboard Cite

Global vegetated coastal habitats (VCHs) represent a large sink for organic carbon (OC) stored within their soils. The regional patterns and causes of spatial variation, however, remain uncertain. The sparsity and regional bias of studies on soil OC stocks from Chinese VCHs have limited the reliable estimation of their capacity as regional and global OC sinks. Here, we use field and published data from 262 sampled

show abstract

“…Although there have been many studies investigating the source of marine sediments in the ECS over recent decades (e.g. Xing et al, 2011;Zhu et al, 2008Zhu et al, , 2011, the migration and burial mechanisms associated with sediments transported by the Yangtze River (the main source of terrestrial material to the ECS inner shelf) are still unclear (Jiao et al, 2018;Yang et al, 2015). Furthermore, there has been little investigation into the post-depositional changes caused by marine organisms and early diagenetic processes.…”

Section: Introductionmentioning

confidence: 99%

Multiple lipid biomarkers record organic matter sources and paleoenvironmental changes in the East China Sea coast over the past 160 years

et al. 2020

View full text Add to dashboard Cite

The use of lipid biomarkers as paleoenvironmental proxies relies on an accurate assessment of their organic matter (OM) sources. In this study, we analyzed multiple lipids in core sediments recovered from the Zhejiang–Fujian coastal mud area to provide a 160-year record of OM input to the East China Sea (ECS) coastal sediments and to reconstruct paleoenvironmental conditions over this interval. The molecular composition of the samples was characterized by a mixture of natural lipids, particularly those derived from terrestrial vascular plants, marine/riverine plankton and macrophytes, and bacteria. The sources of some lipid components were ambiguous/mixed as they were potentially derived from multiple precursor organisms and because of limitations associated with modern survey techniques. There is evidence that early diagenesis caused the preferential degradation of labile aquatic lipids and that the degradation of terrestrial lipids was more severe when subjected to complex horizontal–vertical transportation processes associated with deposition, resuspension, and redeposition. These processes may have led to an enhanced terrestrial OM signal in the normal ( n)-alkane and n-alkanol records, which is at odds with, for example, those of the n-fatty acids, hopanoids, steranes, and sterols, which suggest a dominant marine OM source. Furthermore, we conclude that the occurrence of multiple sources, selective diagenesis, and test error has led to the distortion of redox and maturity indicators based on evidence from pristane-to-phytane (Pr/Ph) ratios and sterane/hopane indices in century scale. Overall, the phytol record suggests an increase in productivity after the early 20th century. Correspondingly, the diatom lipid biomarker records (based on C25 highly branched isoprenoid alkenes and C18:1ω9 fatty acids) reveal a fluctuating but overall increasing diatom productivity after the early 20th century, which coincides with a decreased proportion of the contribution from diatoms relative to that of total phytoplankton. This is believed to correspond to natural environmental changes, as well as anthropogenic impact.

show abstract

Carbon pools and fluxes in the China Seas and adjacent oceans

Cited by 66 publications

References 172 publications

Controls on Organic Carbon Burial in the Eastern China Marginal Seas: A Regional Synthesis

Controls on Organic Carbon Burial in the Eastern China Marginal Seas: A Regional Synthesis

Stocks and losses of soil organic carbon from Chinese vegetated coastal habitats

Multiple lipid biomarkers record organic matter sources and paleoenvironmental changes in the East China Sea coast over the past 160 years

Contact Info

Product

Resources

About