Effect of a tropical cyclone on the pelagic ecosystem of a continental shelf DOI Creative Commons
Chung‐Chi Chen, Chih‐hao Hsieh, Yu Cheng

et al.

Limnology and Oceanography, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Abstract This study aimed to comprehend the effects of Typhoon Maria on pelagic ecosystem in southern East China Sea. Shipboard measurements were conducted at eight sampling stations before (2–4 d) and after (3–6 typhoon, which enabled evaluation potential impacts typhoon this ecosystem, with particular focus carbon dynamics. Following typhoon's passage, there was a slight drop sea surface temperature. The response variables however, exhibited variations different stations. For further analysis, t ‐tests compared variables, while type II regression assessed linear correlation between two variables. Overall, during post‐typhoon period, concentrations nitrate, chlorophyll , primary production, bacterial biomass plankton community respiration, abundance large phytoplankton (> 2 μ m) relative picophytoplankton among larger‐sized picoeukaryotes higher pre‐typhoon period. mean value fugacity CO similar or slightly lower than Although typhoon‐induced vigorous production might have absorbed significant amount decrease could been offset by respiration. findings suggest that enhanced physical disturbance increased water column mixing, which, turn, augmented nutrient availability promoted growth shallow column. sheds light complex interactions typhoons marine ecosystems highlights importance investigating these phenomena better understand their ecological implications.

Language: Английский

Energy flux variations and safety assessment of offshore wind and wave resources during typhoons in the northern South China Sea DOI
Yi Wen, Xingkun Xu, Takuji Waseda

et al.

Ocean Engineering, Journal Year: 2024, Volume and Issue: 302, P. 117683 - 117683

Published: April 5, 2024

Language: Английский

Citations

4
Hydrochemical and microbial community characteristics and the sources of inorganic nitrogen in groundwater from different aquifers in Zhanjiang, Guangdong Province, China DOI
Rentao Liu, Jinrong Qiu,

Shuang Wang

et al.

Environmental Research, Journal Year: 2024, Volume and Issue: 252, P. 119022 - 119022

Published: April 27, 2024

Language: Английский

Citations

4
Changes in fronts regulate nitrate cycling in Zhanjiang Bay: A comparative study during the normal wet season, rainstorm, and typhoon periods DOI
Xin Zhou, Shuwen Zhang,

Chunqing Chen

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 931, P. 172902 - 172902

Published: April 30, 2024

Language: Английский

Citations

4
Changes of Nitrous Oxide Dynamics Induced by Typhoons: A Case in Zhanjiang Bay, China DOI Creative Commons

Shangjun Cai,

Qibin Lao, Xuan Lü

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2025, Volume and Issue: 130(3)

Published: March 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.

Language: Английский

Citations

0
Predicting nature-based coastal protection by mangroves under extreme waves DOI Creative Commons
Zhan Hu, Stijn Temmerman, Qin Zhu

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(12)

Published: March 17, 2025

Forested wetlands such as mangroves are considered highly valuable for nature-based mitigation of coastal flooding. However, their wave attenuation capacity during extreme storms, when risks highest, is rarely measured and remains challenging to predict. Here, we compile a unique dataset on the largest incident heights (0.39 1.44 m) ever recorded in forested wetlands, including our own measurements literature data. Our analysis reveals that can significantly attenuate storm waves (35% over 3 wavelengths) except rare near-submerged cases. Notably, 19 20 existing formulations vegetation drag coefficient, key parameter modeling, inapplicable conditions. Hence, introduce an new approach reliably predict without need coefficient determination nor modeling expertise. This offers practitioners user-friendly tool assess effectiveness solutions hazard mitigation.

Language: Английский

Citations

0
Driving mechanisms of monthly ocean front variations in a typical mariculture bay: insight from quantitative analysis of dual water isotopes DOI
Ruiwen Cao, Qibin Lao, Guangzhe Jin

et al.

Marine Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 107146 - 107146

Published: April 1, 2025

Language: Английский

Citations

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

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: May 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

Language: Английский

Citations

3
Effects of typhoons on primary production and dissolved oxygen in the East China Sea DOI Creative Commons
Wen Yang,

Haixing Wu,

Wenxia Zhang

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: March 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.

Language: Английский

Citations

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

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: March 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.

Language: Английский

Citations

1
Improved determination of nitrate isotopes in irrigated agricultural areas and Bayesian mixing model quantification of nitrate sources and fate DOI Creative Commons
Weilong Jiang, Fang Yang,

Xihuan Wang

et al.

Agricultural Water Management, Journal Year: 2024, Volume and Issue: 298, P. 108872 - 108872

Published: May 11, 2024

Technological advancements in isotope techniques have been widely utilized environmental pollution research, particularly for the monitoring of nitrate water. The utilization pretreatment with an aqueous nitric acid solution offers numerous advantages analyzing isotopic composition; however, there is still room improvement regarding conversion efficiency, reduced reaction time, and cost control. In light this, this study proposes enhanced chemical method that involves mitigating interference caused by nitrogen azide during process, optimizing purge gas to remove interfering factors, improving inlet device measuring nitrous oxide. improved was applied determine isotopes Ulansuhai Basin, Inner Mongolia its reliability verified through analytical results obtained from bacterial denitrification methods. mean δ15N-NO3- δ18O-NO3- values determined using transformation were 4.85‰ 23.44‰, respectively. Compared previous method, maneuverability precise control, time 2 3 hours 1.5 hours, experimental scaled down half original one. addition, contribution each source calculated combining a Bayesian stable mixing model. It found manure sewage accounted (50.1±22.6) % while soil sources contributed (25.1±20.4) levels Lake's methods successfully within can also be other watersheds or regions. These research findings provide valuable theoretical foundation managing watersheds.

Language: Английский

Citations

0