Decadal shift in sea fog frequency over the northern South China Sea in spring: Interdecadal variation and impact of the Pacific Decadal Oscillation

Han, Long; Long, Jingchao; Feng, Xinbin; Xu, Jianjun

doi:10.1016/j.atmosres.2021.105905

Cited by 7 publications

(4 citation statements)

References 43 publications

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“…The monthly WPSH Western Ridge Point Index is published by the National Climate Center of China. The data used and calculated in this paper can be found at Han and Jiang (2024).…”

Section: Conflict Of Interestmentioning

confidence: 99%

Corals Reveal Interdecadal Variation of Tropical Cyclones Modulated by Pacific Decadal Oscillation

Han,

Jiang,

Jiang

et al. 2024

JGR Atmospheres

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Tropical cyclones (TCs) lead to huge economic losses and casualties in coastal regions, but multi‐decadal variation of TC remains poorly understood due to the limited length of observational records and low‐resolution reconstructions. Porites corals provide continuous and monthly resolved records that allow for the determination of weather‐timescale (weekly to monthly) extreme events, including TC, to overcome the above limitations. Here we synthesize five coral Δδ18O records from the South China Sea (SCS) and develop a coral TC frequency index, in good agreement with post‐1980 instrumental records and sediment‐based TC reconstructions over the past century. Our results indicate that TC frequency in the SCS exhibits pronounced decadal variations, with active TCs corresponding to the negative phase of the Pacific Decadal Oscillation. Our findings here provide novel evidence for past TC changes in the SCS and a constraint for predicting future TC changes.

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“…The monthly WPSH Western Ridge Point Index is published by the National Climate Center of China. The data used and calculated in this paper can be found at Han and Jiang (2024).…”

Section: Conflict Of Interestmentioning

confidence: 99%

Corals Reveal Interdecadal Variation of Tropical Cyclones Modulated by Pacific Decadal Oscillation

Han,

Jiang,

Jiang

et al. 2024

JGR Atmospheres

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“…However, the complexity lies in the definition of a threshold, above which visibility is reduced to an extent such that O&M tasks become unfeasible. Following [28], such a threshold is set to 0.004 g/kg at 1000 hPa in this study. Therefore, as illustrated in Figure 2, the operational limit imposed by the sea fog is incorporated as part of the metocean data by means of including an additional condition for the identification of a valid WW.…”

Section: Sea Fog Estimationmentioning

confidence: 99%

On the Definition of a Comprehensive Technology-Informed Accessibility Metric for Offshore Renewable Energy Site Selection

Konuk,

Centeno-Telleria,

Zarketa-Astigarraga

et al. 2023

JMSE

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Despite the important role of offshore renewable energies (OREs) in the energy transition, the economical viability is still unclear. Therefore, an appropriate site selection is crucial. Besides the energy potential, the impact of operation and maintenance (O&M) aspects on the location can be critical. Accessibility is one of the most relevant aspects for O&M, assessing the feasibility to access the ORE farm. However, traditional accessibility assessment metrics do not allow a comprehensive evaluation. Therefore, the present paper suggests a novel, technology-informed metric, incorporating the overall set of most critical aspects, i.e., metocean conditions, visibility due to sunlight and sea fog, system failures, and O&M logistics. Among the different aspects, limited visibility is shown to be highly relevant with a reduction of up to 60% in accessibility. The study assesses accessibility in five different locations across Europe. On the one hand, accessibility is shown to be less sensitive to long-term resource variations with a reduction of 5% in the last six decades. On the other hand, accessibility is overall shown to be inversely proportional to the energy potential, meaning that as the energy potential increases, accessibility is reduced, increasing downtime, reducing the energy generation and increasing the cost of energy. As a consequence, site selection should combine the energy potential and accessibility assessments, which is enabled by the technology-informed metric presented here.

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“…Most sea fog events in the Yellow Sea are caused by the advection of heat and water vapor by the prevailing wind Kim and Yum, 2010;Wang and Chen, 2014;Han et al, 2022); therefore, it is so essential to understand the origin and characteristics of air masses to predict fog events. Figure 5A shows all air trajectory objects at S-ORS resulting from the NOAA HYSPLIT 24 h back trajectories and their four major clusters.…”

Section: Major Airflow Paths Associated With Fog Eventsmentioning

confidence: 99%

Physical Processes in Sea Fog Formation and Characteristics of Turbulent Air-Sea Fluxes at Socheongcho Ocean Research Station in the Yellow Sea

Yun

2022

Front. Mar. Sci.

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The Yellow Sea is the most fog-prone region of the East Asian marginal seas. Since sea fog is caused due to complex interactions between atmospheric and oceanic environments, direct observations can help understand the physical processes involved in fogging over the oceans. Completed in 2014, the Socheongcho Ocean Research Station (S-ORS) plays a critical role in monitoring air-sea interactions over the Yellow Sea. This study aimed to evaluate the conditions favorable for fog generation and the physical processes underlying it using a suite of observations and turbulent heat flux data from S-ORS. First, we used the visibility data from S-ORS to quantify the frequency of sea fog over the Yellow Sea. From April to June 2016, sea-fog occurred 61 times, with a maximum duration of 135 h (approximately 5.6 days). Next, to understand the origin and characteristics of air mass associated with fog events, we classified the primary airflow paths in the region using a Hybrid Single-Particle Lagrangian Integrated Trajectory model. Among the four clusters identified from the cluster analysis, the third and fourth had distinct physical properties characteristic of cold and warm fog, respectively. The third cluster was characterized by relatively weak or negative heat advection and weak vertical mixing, while the fourth one featured strong positive heat transport and moisture convergence over the Yellow Sea. Finally, based on cluster analysis, we choose the representative cases related to these two clusters observed at S-ORS and compared the characteristics of turbulent air-sea fluxes associated with fog formations.

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Decadal shift in sea fog frequency over the northern South China Sea in spring: Interdecadal variation and impact of the Pacific Decadal Oscillation

Cited by 7 publications

References 43 publications

Corals Reveal Interdecadal Variation of Tropical Cyclones Modulated by Pacific Decadal Oscillation

Corals Reveal Interdecadal Variation of Tropical Cyclones Modulated by Pacific Decadal Oscillation

On the Definition of a Comprehensive Technology-Informed Accessibility Metric for Offshore Renewable Energy Site Selection

Physical Processes in Sea Fog Formation and Characteristics of Turbulent Air-Sea Fluxes at Socheongcho Ocean Research Station in the Yellow Sea

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