Tropical cyclones (TCs) are synoptic-scale systems with a diameter of up to 2000 km, and may persist for several days to weeks. They can significantly affect the atmospheric conditions and ozone (O) concentrations in coastal areas. They also induce stratospheric intrusion (SI, the injection of stratospheric O into the troposphere) by changing the height of the tropopause. Focusing on the Yangtze River Delta (YRD) region, a highly urbanized coastal area with severe O pollution, we systematically analyze the characteristics of O pollution and SIs as well as their connections under the influence of tropical cyclone Ampil. Based on surface observations, 120-h backward trajectories and ERA5 reanalysis meteorological data, the urban O pollution affected by tropical cyclone Ampil mainly resulted from active photochemical reactions inside the boundary layer and poor diffusion conditions characterized by weak winds. SIs induced by tropical cyclone Ampil were important for the upper and middle troposphere, where O concentration could increase up to 180 ppbv. But they hardly reached the ground over the YRD. Therefore, there was no direct connection between O pollution and SIs. However, the location of SIs can predict urban O pollution. SIs moved with tropical cyclone Ampil but appeared on the northwest side of Ampil, usually 500-1000 km away from tropical cyclone Ampil center. At 200 hPa, they corresponded to a high-PV (>2 PVU) air mass rich in O (>200 ppbv). Below this stratospheric PV signature, urban O concentration was usually high.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.scitotenv.2022.154261 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spatio-temporal risk prediction of leptospirosis: A machine-learning-based approach.
PLoS Negl Trop Dis
January 2025
Institute of Exact and Applied Sciences, University of New Caledonia, Nouméa, Province Sud, New Caledonia.
Background: Leptospirosis is a neglected zoonotic disease prevalent worldwide, particularly in tropical regions experiencing frequent rainfall and severe cyclones, which are further aggravated by climate change. This bacterial zoonosis, caused by the Leptospira genus, can be transmitted through contaminated water and soil. The Pacific islands bear a high burden of leptospirosis, making it crucial to identify key factors influencing its distribution.
View Article and Find Full Text PDFA scoping review and thematic analysis of the effects of tropical cyclones on diarrheal diseases.
Environ Epidemiol
February 2025
Department of Global Health Policy, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Background: Tropical cyclones pose significant health risks and can trigger outbreaks of diarrheal diseases in affected populations. Although the effects of individual hazards, such as rainfall and flooding, on diarrheal diseases are well-documented, the complex multihazard nature of tropical cyclones is less thoroughly explored. To date, no dedicated review comprehensively examines the current evidence and research on the association between tropical cyclones and diarrheal diseases.
View Article and Find Full Text PDFAssessment and application of tropical cyclone clustering in the South China Sea.
Sci Rep
January 2025
College of Ocean and Meteorology & South China Sea Institute of Marine Meteorology, Guangdong Ocean University, 524088, Zhanjiang, Guangdong, China.
Accurate classification of tropical cyclone (TC) tracks is essential for evaluating and mitigating the potential disaster risks associated with TCs. In this study, three commonly used methods (K-means, Fuzzy C-Means, and Self-Organizing Maps) are assessed for clustering historical TC tracks that originated in the South China Sea from 1949 to 2023. The results show that the K-means method performs the best, while the Fuzzy C-Means and Self-Organizing Maps methods are also viable alternatives.
View Article and Find Full Text PDFAssessing blue carbon in mangrove ecosystems of Seychelles.
J Environ Manage
January 2025
Deakin Marine Research and Innovation Centre, School of Life and Environmental Sciences, Deakin University, Burwood Campus, Burwood, VIC 3125, Australia; Centre for Nature Positive Solutions, School of Science, RMIT University, Melbourne, VIC 3000, Australia.
Mangrove forests play an important role in climate change mitigation and adaptation, globally recognized as natural climate solution. The protection and restoration of mangrove ecosystems are especially important to Small Island Developing States, like Seychelles, due to their vulnerability to the impacts of climate change, such as sea level rise and tropical cyclones. Therefore, it is crucial for countries like Seychelles to develop baseline information on the status of their mangrove forests to guide conservation and management actions.
View Article and Find Full Text PDFAssessing the preservation potential of successive hurricane overwash deposits in Florida, USA mangroves.
Sci Rep
January 2025
Department of Environmental Studies and Geology, Bryn Mawr College, Bryn Mawr, PA, USA.
Geologic records of tropical cyclones (TCs) in low-energy, back-barrier environments are established by identifying marine sediments via their allochthonous biogeochemical signal. These records have the potential to reconstruct TC intensity and frequency through time. However, modern analog studies are needed to understand which biogeochemical indicators of overwash sediments are best preserved and how post-depositional changes may affect their preservation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!