Regional Studies in Marine Science, Год журнала: 2024, Номер 80, С. 103902 - 103902
Опубликована: Ноя. 9, 2024
Язык: Английский
Journal of Geophysical Research Oceans, Год журнала: 2024, Номер 129(2)
Опубликована: Фев. 1, 2024
Abstract Typhoons exert a profound impact on marine biogeochemical processes, with organic matter (OM) decomposition serving as key process in coastal waters after typhoons. Despite its significance, the specific contributions of particulate (POM) and dissolved (DOM) to OM triggered by typhoons remains unclear. In this study, stable isotopes POM spectral properties DOM were investigated before Typhoon “Barija" Zhanjiang Bay, northwestern South China Sea. The typhoon‐induced intrusion high‐salinity seawater from lower bay upper bay, driven external clockwise wind stress, led formation an ocean front middle during typhoon. Notably, induced typhoon (72%) significantly surpassed that (5%), attributed barrier effect increased vertical mixing bay. contrast, removed only 29% net addition occurred due phytoplankton growth decomposition. More importantly, despite overall larger water column, inventory (20.19 g m −2 ) exceeded (16.08 ). Overall, our study suggests is more critical than typhoons, primarily influenced mixing. These findings contribute clearer understanding post‐typhoon dynamics waters.
Язык: Английский
Процитировано
7
The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 168944 - 168944
Опубликована: Дек. 1, 2023
Язык: Английский
Процитировано
15
Journal of Environmental Management, Год журнала: 2024, Номер 358, С. 120935 - 120935
Опубликована: Апрель 21, 2024
Язык: Английский
Процитировано
6
The Science of The Total Environment, Год журнала: 2024, Номер 924, С. 171676 - 171676
Опубликована: Март 12, 2024
Язык: Английский
Процитировано
5
The Science of The Total Environment, Год журнала: 2024, Номер 931, С. 172902 - 172902
Опубликована: Апрель 30, 2024
Язык: Английский
Процитировано
4
Frontiers in Marine Science, Год журнала: 2025, Номер 12
Опубликована: Март 14, 2025
Coastal eutrophication has become a persistent environmental crisis around world driven by human activities and climate change. Nowadays, frequent intense tropical typhoon disturbances strongly affected the distribution composition of nutrients in land-ocean interface, resulting risk coastal water. However, mechanistic links between land-based sources transport have not been well understood due to complex processes. In this study, nutrient concentration, flux three estuaries one sewage outlet Zhanjiang Bay (ZJB) were analyzed. Before typhoon, average concentrations dissolved inorganic nitrogen (DIN), phosphorus (DIP) silicate (DSi) source ZJB 61.77 ± 28.56 μmol/L, 6.79 4.61 113.26 64.52 respectively. The concentration DIN decreased approximately 41.8%, DIP increased 46.2%, DSi 1.7% after Typhoon Kompasu made landfall. At same time, DIN/DIP DIN/DSi outlets estuary landfall much smaller than Redfield ratio, indicating different degrees limitation. addition, significant spatial temporal variations fluxes observed before typhoon. total input DIN, DIP, outfall 9.98 × 10 4 mol/h, 1.38 9.78 contrast, 3.21 3 3.01 5.20 mol/h. After entering sea from changed significantly compared with those Moreover, model discharge established, which can estimate based on field investigation. This study reveals effects event into semi-enclosed ZJB, provides scientific basis for further research impacts typhoons enrichment waters, as deepening understanding ecosystem under
Язык: Английский
Процитировано
0
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
Frontiers in Marine Science, Год журнала: 2025, Номер 11
Опубликована: Янв. 21, 2025
The export and transformation of riverine dissolved organic matter (DOM) at the river-sea interface are critical to understanding carbon budgets in tropical regions, yet remain underexplored small watersheds. This study analyzed (DOC), chromophoric (CDOM), fluorescent DOM (FDOM) over five cruises from summer 2021 2022 Suixi Estuary-Zhanjiang Bay continuum, a eutrophic transition zone northwestern South China Sea. Seasonal variations were pronounced for continuum two endmembers. Freshwater DOM, dominated by terrestrial materials, was closely tied soil leaching erosion, correlating with precipitation patterns. Conversely, seawater enriched protein-like FDOM, varied West-Guangdong Coastal Current its associated primary production. Linear decreases increasing salinity indicate that conservative mixing largely shapes distributions especially humic-like FDOM. Non-conservative processes, including flocculation, phytoplankton production, microbial transformation, variably alter components across seasons. River contributed considerably but disproportionately annual flux (47-59%), due intense processes mobilize refractory terrigenous DOM. deviation observed River’s DOC-CDOM relationship global rivers, coupled distinctive single-peak pattern between carbon-specific absorption coefficient water yield highlights role watershed nature influencing river-exported composition. notably high DOC CDOM yields further emphasize importance small, rivers shaping estuarine coastal budget.
Язык: Английский
Процитировано
0
Journal of Geophysical Research Biogeosciences, Год журнала: 2025, Номер 130(3)
Опубликована: Март 1, 2025
Abstract Under the influence of global climate change, both frequency and intensity typhoons are increasing. This study examines impact typhoon on nitrous oxide (N 2 O) dynamics in coastal bays, which most active areas N O production ocean. Employing 15 stable isotope labeling technique, coupled with mass spectrometry analysis key biogeochemical parameters, we conducted a series five continuous cruises before (one cruise) after Chaba (four cruises) Zhanjiang Bay, semiclosed bay northern South China Sea. Our results showed that landfall led to sharp decrease concentration Bay. However, also triggered substantial water column sedimentary environments, therefore facilitating rapid recovery levels within short period. In column, typhoon‐induced enhancement situ could be attributed input nutrients terrestrial particles, creates an anaerobic or hypoxic microenvironment conducive production. Concurrently, sediment, deposition particles derived from phytoplankton blooms introduces large amount fresh particulate organic matter, further promoting findings suggest efficient nitrogen removal process, has been previously underestimated. By elucidating aspects cycle bays during typhoons, this research aids shaping policies mitigate greenhouse gas emissions by typhoons.
Язык: Английский
Процитировано
0
Marine Environmental Research, Год журнала: 2025, Номер unknown, С. 107146 - 107146
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0