The Seasonal Effect of Coastal Current and Upwelling on the Dynamics of Dissolved Organic Matter in the Northwestern South China Sea DOI

Xuan Lu,

Qibin Lao, Chao Wang

и другие.

Journal of Geophysical Research Oceans, Год журнала: 2024, Номер 129(7)

Опубликована: Июнь 27, 2024

Abstract Previous studies have primarily focused on the impact of human activities coastal dissolved organic matter (DOM) cycles, while neglecting role dynamic processes. This limits our comprehensive understanding processes DOM, particularly in waters affected by multiple In this study, dynamics DOM northwestern South China Sea (SCS) were investigated using DOM‐related parameters and a three end‐member mixing model, which accounted for effects currents upwelling during spring, summer, winter seasons. Our results demonstrated that net addition was predominantly observed nearshore all seasons, owing to strong induced phytoplankton production particle desorption. However, weaker spring winter, removal decomposition western offshore area. observation can be attributed abundance microorganisms increased vertical water winter. Conversely, stronger provided more bio‐refractory limiting its decomposition, whereas stimulated productivity desorption, resulting period. eastern area, primary mechanism eliminating weak or absent upwelling. study revealed is widespread regions SCS facilitate DOM.

Язык: Английский

Sources and Evolution of Sulfate Under Different Hydrodynamic Conditions in Groundwater of a Typical Southwest China Karst Mining Area: Evidence from Geochemical and Isotopic Fingerprints DOI

Mingtan Zhu,

Guo Liu, Jiajun Fan

и другие.

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0

Impact of typhoons on the ecological environment of the Pearl River Estuary in the summer of 2021—a study of an algal bloom event DOI Creative Commons
Xin Zhang, Shan Gao, Xuanliang Ji

и другие.

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Май 10, 2024

In the summer of 2021, two typhoons, Typhoon Cempaka and Lupit, passed through Pearl River Estuary (PRE), resulting in a noticeable chlorophyll-a (Chla) bloom event on west side PRE. Utilizing coupled hydrodynamic-ecological model (ROMS-CoSiNE), we investigated changes marine environment during two-typhoon period explored underlying mechanisms involved. Our effectively reproduces spatial characteristics typhoon-induced algal blooms. The results suggest that westward invasion plume has predominant impact alterations biochemical elements. For further quantitative analyses, utilized to determine Chla concentration budget region assess dominant mechanism, particularly focusing horizontal advection. findings indicated events are mainly attributed straightforward physical namely, phytoplankton transportation, rather than nutrient-induced growth. study also revealed different growth processes simulated species did not contribute positively increased concentrations. However, research is needed investigate impacts functional groups ecological under influence typhoons. This enhances understanding response environments coastal areas

Язык: Английский

Процитировано

3

Terrestrial inputs and physical processes control the distributions of potentially toxic elements (PTEs) in the seawater of the large-range Beibu Gulf, the northern South China Sea DOI

Huihua Wei,

Zuhao Zhu, Weili Wang

и другие.

Marine Pollution Bulletin, Год журнала: 2023, Номер 196, С. 115617 - 115617

Опубликована: Окт. 10, 2023

Язык: Английский

Процитировано

6

Effects of typhoons on primary production and dissolved oxygen in the East China Sea DOI Creative Commons
Wen Yang,

Haokun Wu,

Wenxia Zhang

и другие.

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Март 22, 2024

Previous investigations confirm that typhoons deliver both dissolved oxygen and nutrient sources via promoting vertical/lateral exchanges between water masses. The former one replenishes for the bottom prevents persistent depletion, while latter facilitates primary production subsequent subsurface consumption. However, it is left unknown if ultimately result in net gain or loss of during passage. Tropical cyclone information, satellite observations, numerical simulations were used to investigate response dynamics typhoons. Results imply typhoon intensity, distance track Changjiang estuary control magnitude responses production, air-sea flux, advection-induced variation, consumption variation. model-based budget analysis indicated content increased after passage all occurred 2011-2020. findings this study suggest oxygen. strength frequency warming future would play an important role counteracting deoxygenation, which likely slow down pace deterioration seasonal hypoxia region.

Язык: Английский

Процитировано

2

Water residence time controls seasonal nitrous oxide budget in a semi-enclosed bay: Insights from an improvement estimation method DOI

Shangjun Cai,

Qibin Lao, Minggang Cai

и другие.

Marine Pollution Bulletin, Год журнала: 2024, Номер 206, С. 116701 - 116701

Опубликована: Июль 10, 2024

Язык: Английский

Процитировано

2

Distribution and sources of sedimentary organic matter in different aquaculture areas of northeastern Zhanjiang Bay using stable carbon and nitrogen isotopes DOI
Fengxia Zhou, Shuangling Wang, Fang Han

и другие.

Acta Oceanologica Sinica, Год журнала: 2024, Номер 43(6), С. 38 - 48

Опубликована: Июнь 1, 2024

Язык: Английский

Процитировано

2

Changes in hydrodynamics and nutrient load of the coastal bay induced by Typhoon Talim (2023) DOI Creative Commons

Chunqing Chen,

Qibin Lao, Xin Zhou

и другие.

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Март 27, 2024

Typhoons can greatly alter the hydrodynamic and nutrient supply in coastal oceans. However, due to complex conditions of typhoons, such as their intensity, even slight changes may cause substantial hydrodynamics supply, which needs be better understood. In this study, we conducted two cruises before after Typhoon Talim (2023) quantitatively investigate Zhanjiang Bay using dual water isotopes. Before typhoon, strong stratification occurred bay. external force typhoon destroyed substantially changed mixing bay typhoon. upper bay, massive freshwater input remarkably decreased salinity during post-typhoon period (freshwater increased by 18%). contrast, variation lower was minimal, mainly seawater intrusion from outer induced typhoon; mixed with columns forming a ocean front. The intensity fronts typhoons directly depended on landing Bay, stronger will more high-salinity Due formation front, terrestrial nutrients are prevented being transported downwards, resulting large amount accumulated pollutants within By impact intrusion, contribution has increased, thereby diluting This study provides new insight into responses marine eco-environment systems typhoons.

Язык: Английский

Процитировано

1

The impact of typhoons on the biogeochemistry of dissolved organic matter in eutrophic bays in northwestern South China Sea DOI
Xuan Lü, Qibin Lao,

Fajin Chen

и другие.

Acta Oceanologica Sinica, Год журнала: 2024, Номер 43(6), С. 15 - 31

Опубликована: Июнь 1, 2024

Язык: Английский

Процитировано

1

Isotope constraints on seasonal dynamics of nitrogen in Zhanjiang Bay, a typical mariculture bay in South China DOI

Chunqing Chen,

Qibin Lao,

Fajin Chen

и другие.

Acta Oceanologica Sinica, Год журнала: 2024, Номер 43(6), С. 60 - 70

Опубликована: Июнь 1, 2024

Язык: Английский

Процитировано

1

Dissolved oxygen depletion in Chinese coastal waters DOI
Wenxia Zhang,

Pan Song,

Liuqian Yu

и другие.

Water Research, Год журнала: 2024, Номер 272, С. 123004 - 123004

Опубликована: Дек. 18, 2024

Язык: Английский

Процитировано

1