Revealing the Mobilization and Age of Estuarine Dissolved Organic Matter During Floods Using Radiocarbon and Molecular Fingerprints DOI
Zhao Liang Chen, Yuanbi Yi, Ruanhong Cai

et al.

Water Research, Journal Year: 2024, Volume and Issue: 271, P. 122898 - 122898

Published: Nov. 30, 2024

Language: Английский

Marine Recalcitrant Dissolved Organic Matter Gained by Processing at Sandy Subterranean Estuaries DOI
Peng Zhang, Yinghui Wang, Biwei Yang

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

The sandy subterranean estuary (STE) connecting fresh groundwater to saline sea water is characterized by strong geochemical (salinity, redox, and pH) gradients, with evidence emerging for its role as a hot spot consumption of labile substrates. This inspired us conduct study evaluate whether this holds true dissolved organic matter (DOM), especially given the still mysterious origin marine recalcitrant DOM. Here, characterization DOM 21 samples (depth 1-13 m, salinity 3.9‰ 32.4‰) across 65 m transect an STE located in coastal Guangdong, China, has found systematic biotransformation toward "recalcitrant" carboxyl-rich alicyclic molecules (CRAM). fraction CRAM (%CRAM) increases from 33.1% 76.7% increasing degree degradation salinity. Further, processing DOM, including more "biolabile" lower %CRAM released aquitard, active under oxic conditions than reducing conditions. Given large quantities that recirculates through STEs globally, amount (RDOM) entering ocean after likely be considerable. While studies are needed, can gain CRAM-like compounds way.

Language: Английский

Citations

2
Distribution Characteristics and Source Analysis of Dissolved Organic Matter with Different Molecular Weights in the Coastal Waters of Zhejiang Province DOI

Xiumei Sun,

Suping Song,

Chenghu Yang

et al.

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 205, P. 107020 - 107020

Published: Feb. 18, 2025

Language: Английский

Citations

0
Severe flood modulates the sources and age of dissolved organic carbon in the Yangtze River Estuary DOI
Zhao Liang Chen, Yuanbi Yi, Wenjing Fu

et al.

Environmental Research, Journal Year: 2024, Volume and Issue: 252, P. 119040 - 119040

Published: April 29, 2024

Language: Английский

Citations

2
Beyond Hydrology: Exploring the Factors Influencing the Seasonal Variation of the Molecular Composition of Riverine Dissolved Organic Matter DOI

Xiaoqian Zhan,

Hongyan Bao, Jutta Niggemann

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(9)

Published: Sept. 1, 2024

Abstract The export of dissolved organic matter (DOM) from rivers is essential for linking terrestrial and marine carbon reservoirs in the global cycle. However, there limited knowledge regarding how molecular composition riverine DOM changes under different hydrological conditions, especially during extreme rainfall events. Moreover, factors beyond hydrology that impact have not been well defined. To address these gaps, samples were collected a human‐impacted medium‐sized subtropical monsoonal river across various conditions throughout complete Utilizing high‐resolution mass spectrometry, it was discovered solid‐phase extractable (SPE‐DOM) high‐flow (1 < runoff (Q): annual mean (Q m ) 3) extreme‐rain (Q:Q > periods exhibited higher number formulae, lower H/C, O/C, proportion carboxylic‐rich alicyclic molecules compared to low‐flow period (LFP) 1). These alterations attributed input more diverse sources, particularly greater soil with oxidation degrees. Additionally, P‐containing formulae enriched period, likely agricultural lands sediment release. Conversely, fraction S‐containing significantly LFP, possibly due amplified influence anthropogenic input. Furthermore, aromaticity did fluctuate but associated temperature. In summary, study indicated varied temperature activities identified as crucial influencing export.

Language: Английский

Citations

0
Molecular fingerprints of sedimentary dissolved organic matter in mangroves: Importance to blue carbon sequestration DOI
Zhao Liang Chen, Zhe‐Xuan Zhang, Ruanhong Cai

et al.

Chemical Geology, Journal Year: 2024, Volume and Issue: 671, P. 122495 - 122495

Published: Nov. 14, 2024

Language: Английский

Citations

0
Revealing the Mobilization and Age of Estuarine Dissolved Organic Matter During Floods Using Radiocarbon and Molecular Fingerprints DOI
Zhao Liang Chen, Yuanbi Yi, Ruanhong Cai

et al.

Water Research, Journal Year: 2024, Volume and Issue: 271, P. 122898 - 122898

Published: Nov. 30, 2024

Language: Английский

Citations

0