Observational study of surface wind along a sloping surface over mountainous terrain during winter

Lee, Younghee; Lee, GyuWon; Joo, Sangwon; Ahn, Kwang-Deuk

doi:10.1007/s00376-017-7075-5

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…Strong winds, heavy snowfall, and low visibility caused by ECS might delay or postpone events associated with the Winter Olympic Games [16][17][18]. Beijing, China will host the 24th Olympic and Paralympic Winter Games (BJ2022) from 4 to 20 February and from 4 to 13 March 2022, respectively (BJ2022 in the following).…”

Section: Introductionmentioning

confidence: 99%

Pre-Signal and Influencing Sources of the Extreme Cold Surges at the Beijing 2022 Winter Olympic Competition Zones

2020

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The 24th Olympic and Paralympic Winter Games will take place in Beijing in 2022. All three competition zones are vulnerable to extreme cold surges (ECSs), owing to the occurrence of the East Asian winter monsoon. In this paper, a representative competition domain (37.5–42.5° N, 110–120° E) is adopted, with a view to avoiding the differences in both the geographies and the thresholds of ECSs among different zones by considering the probability of simultaneous occurrences. Since 2009, the ECSs in the domain have displayed higher frequency and extremity. Based on all ECS cases in the domain, the dominant circulation is revealed by a quasi “reverse-Ω” pattern, with two strong ridges over the east of the Ural Mountain and the Okhotsk Sea, and a broad, deep trough in East Asia. The influencing sources of the ECSs at the domain could be traced to the Novaya Zemlya by a day-by-day backward analysis. The oblique latitude/longitude–time profiles of both the 500 hPa geopotential height and the 850 hPa air temperature anomalies from the source to the domain clearly indicate that the pre-signal could have a leading influence that exceeds ten days, with a slow accumulation in the first stage and a rapid outburst in the second stage.

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Section: Introductionmentioning

confidence: 99%

Pre-Signal and Influencing Sources of the Extreme Cold Surges at the Beijing 2022 Winter Olympic Competition Zones

2020

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“…Similarly, it is statistically proven that cities with high wind speed have a lesser number of COVID-19 cases [48] and it is evident that pollutant parameters have an influence on climatic variables [49]. The geographical location of Coimbatore (foothills of western ghats) creates turbulence in the wind flow through wind gusts [50], which resulted in dispersion or dilution of criteria pollutants resulting in a positive response in the microclimatic condition.…”

Section: Climatic Variables and Criteria Pollutantsmentioning

confidence: 96%

Covid-19 Influence on Mixed Urban Cluster Air Quality: A Case Study from INDIA

Mahalingam,

Narayanan

2023

Asian Pac J Envi & Cancer

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Introduction: Policy decisions on containment of commercial activity to control the spread of COVID-19 SARS may influence urban air quality. Methodology: A methodological approach has been proposed to explore the relationship that exists between the policy decisions on six criteria pollutants (PM10, PM2.5, SO2, Ozone, NO2, and CO). This study also explores the knowledge /association that exists between the climatic variables, criteria pollutants, inhalation exposure dose levels and its vulnerable population age group and gender. The methodology explores a mixed urban cluster, Coimbatore, Tamilnadu, INDIA. Results: From the results, PM10, PM2.5, SO2 and CO has reduced to about 31%, 42%, 26% and 29% during phase-I, whereas NO2 (66%) and Ozone (14%) has increased. It is inferred that the reduced criteria pollutant load (during the phase I, II, and III) gets dispersed taking the advantage of geographical location. Conclusion: It is also observed that gender has an influence on the inhalation dose due to variability in inflow rate.

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“…Accurate weather forecasting is critical for the success of the Winter Olympic Games because winter sports are severely impacted by various weather conditions (Joe et al, 2010(Joe et al, , 2023Chen et al, 2018;Lee et al, 2018;Li et al, 2020;Tong et al, 2020;Xia et al, 2020;Kim et al, 2021;Yang et al, 2021a, b;Deng et al, 2022;Tsai et al, 2023). Given the complex topography and scarce observational data in mountainous regions, achieving accurate and high-resolution (both spatially and temporally) weather forecasts for a specific site or sporting event represents a significant challenge (Goger et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Scientific Advances and Weather Services of the China Meteorological Administration’s National Forecasting Systems during the Beijing 2022 Winter Olympics

Deng,

Shen,

et al. 2024

Adv. Atmos. Sci.

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Since the Beijing 2022 Winter Olympics was the first Winter Olympics in history held in continental winter monsoon climate conditions across complex terrain areas, there is a deficiency of relevant research, operational techniques, and experience. This made providing meteorological services for this event particularly challenging. The China Meteorological Administration (CMA) Earth System Modeling and Prediction Centre, achieved breakthroughs in research on short-and medium-term deterministic and ensemble numerical predictions. Several key technologies crucial for precise winter weather services during the Winter Olympics were developed. A comprehensive framework, known as the Operational System for High-Precision Weather Forecasting for the Winter Olympics, was established. Some of these advancements represent the highest level of capabilities currently available in China. The meteorological service provided to the Beijing 2022 Games also exceeded previous Winter Olympic Games in both variety and quality. This included achievements such as the "100-meter level, minute level" downscaled spatiotemporal resolution and forecasts spanning 1 to 15 days. Around 30 new technologies and over 60 kinds of products that align with the requirements of the Winter Olympics Organizing Committee were developed, and many of these techniques have since been integrated into the CMA's operational national forecasting systems.These accomplishments were facilitated by a dedicated weather forecasting and research initiative, in conjunction with the preexisting real-time operational forecasting systems of the CMA. This program represents one of the five subprograms of the WMO's high-impact weather forecasting demonstration project (SMART2022), and continues to play an important role in their Regional Association (RA) II Research Development Project (Hangzhou RDP). Therefore, the research accomplishments and meteorological service experiences from this program will be carried forward into forthcoming highimpact weather forecasting activities. This article provides an overview and assessment of this program and the operational national forecasting systems.

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Observational study of surface wind along a sloping surface over mountainous terrain during winter

Cited by 7 publications

References 19 publications

Pre-Signal and Influencing Sources of the Extreme Cold Surges at the Beijing 2022 Winter Olympic Competition Zones

Pre-Signal and Influencing Sources of the Extreme Cold Surges at the Beijing 2022 Winter Olympic Competition Zones

Covid-19 Influence on Mixed Urban Cluster Air Quality: A Case Study from INDIA

Scientific Advances and Weather Services of the China Meteorological Administration’s National Forecasting Systems during the Beijing 2022 Winter Olympics

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