Fog at Abu Dhabi International Airport

Villiers, M. P. de; Heerden, Johan van

doi:10.1002/wea.45

Cited by 22 publications

(17 citation statements)

References 5 publications

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“…For the period of 1999-2016, the mean increases to 99 fog events. A previous study reported 38 foggy nights a year over the period 1982-2003 [49]. The average value of fog events increased fourfold in Abu Dhabi after 1999, and fivefold in Dubai.…”

Section: Frequency Analysis Of Wet-and Dry-related Poor Visibility Evmentioning

confidence: 86%

“…The greater frequency of fog events in fall and winter can be attributed to dry air aloft in subsiding conditions, which promotes surface cooling while suppressing surface wind. Light wind associated with a clear sky, and in the presence of dry air above the moist boundary layer, allows much more heat to escape from the earth surface, leading to fog formulation [49]. Further analysis is conducted on fog and dust frequency to understand their role in visibility deterioration in Abu Dhabi and Dubai airport stations since both have a high pronounced impact on visibility.…”

Section: Long-term Visibility Variability and Trend Analysismentioning

confidence: 99%

“…The risk of rejecting the null hypothesis (H 0 : The variances are identical), while it is true is lower than 0.01% and 0.04%, respectively. The annual variability of fog events could be related to the fact that Abu Dhabi airport station is located very close to the shoreline, the warm Gulf, and the desert, which makes it prone to more fog events [31,49], especially the radiation type of fog events. Abu Dhabi airport is also located at the limits of the city which makes it closer to cooler nocturnal surface temperatures in the desert.…”

Section: Frequency Analysis Of Wet-and Dry-related Poor Visibility Evmentioning

confidence: 99%

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Analysis of the Long-Term Variability of Poor Visibility Events in the UAE and the Link with Climate Dynamics

Aldababseh

Temimi

2017

Atmosphere

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Abstract:The goal of this study is to investigate the variability of poor visibility events occurring hourly in the UAE and their relationship to climate dynamics. Hourly visibility observation data spanning more than three decades from ten stations across the country were used. Four intervals of low visibility, between 0.10 km and 5.0 km, were considered. Poor visibility records were analyzed under wet and dry weather conditions. The Mann-Kendall test was used to assess the inferred trends of low visibility records. The relationships between poor visibility measurements and associated meteorological variables and climate oscillations were also investigated. Results show that Fujairah city has the highest average visibility values under wet weather conditions, while Abu Dhabi city has the lowest average visibility values under both wet and dry conditions. Wet weather conditions had a greater impact than dry weather conditions on visibility deterioration in seven out of the ten stations. Results confirm that fog and dust contribute significantly to the deterioration of visibility in the UAE and that Abu Dhabi has been more impacted by those events than Dubai. Furthermore, the numbers of fog and dust events show steep increasing trends for both cities. A change point in poor visibility records triggered by fog and dust events was detected around the year 1999 at Abu Dhabi and Dubai stations after the application of the cumulative sum method. Increasing shifts in the means and the variances were noticed in the total annual fog events when Student's t-test and Levene's test were applied. In Abu Dhabi, the mean annual number of dust events was approximately 112.5 before 1999, increasing to 337 dust events after 1999. In Dubai, the number of dust events increased from around 85.5 to 315.6 events. The inferred fog and dust trends were compared to four climate indices. Results showed a significant correlation (positive and negative) between four climate indices and the occurrence of fog and dust events in the UAE.

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Section: Frequency Analysis Of Wet-and Dry-related Poor Visibility Evmentioning

confidence: 86%

Section: Long-term Visibility Variability and Trend Analysismentioning

confidence: 99%

Section: Frequency Analysis Of Wet-and Dry-related Poor Visibility Evmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the Long-Term Variability of Poor Visibility Events in the UAE and the Link with Climate Dynamics

Aldababseh

Temimi

2017

Atmosphere

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“…The first approach to the fog forecasting problem is to better understand the various mechanisms involved in its formation, maintenance, and dissipation (Tardif and Rasmussen 2007). Conceptual models have been developed to aid in the forecasting of fog events (Croft et al 1997;De Villiers and Van Heerden 2007) for specific locations. These conceptual models all include a fog climatology, although other tools such as numerical weather prediction guidance and sounding analysis form part of the conceptual model approach.…”

Section: Introductionmentioning

confidence: 99%

Climatological Characteristics of Fog at Cape Town International Airport

Schalkwyk

Dyson

2013

Weather and Forecasting

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The character of fog at Cape Town International Airport (CTIA), South Africa, is investigated, using 13 yr of historical hourly data during the period 1997–2010. Hourly surface observations are used to identify fog types that most frequently affect CTIA, by using an objective fog-type classification method that classifies fog events according to their primary formation mechanisms. Fog-type characteristics, such as the minimum visibility, duration, and time of onset and dissipation, are determined. Self-organizing maps (SOMs) are used to determine the dominant synoptic circulation types associated with fog at CTIA. Results show that radiative processes are the most common cause of fog, with an enhanced likelihood of radiation fog in winter. Cloud-base-lowering fog and advection fog events are more likely at the start of the fog season. As the fog season (March–August) progresses, synoptic circulations associated with fog change from a dominant low pressure pattern along the west coast in March and April to a dominant interior high pressure pattern toward July and August. The techniques presented may be used to provide aviation forecasters with a detailed description of the types of fog that frequently occur, their characteristics, and the synoptic circulation associated therewith.

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“…It is surprisingly common along the Arabian Gulf coasts (de Villiers and van Heerden, 2007a), where it may prove a very uncomfortable experience -and even occasionally a dangerous one -when the fog-point is high. Sea-breeze penetration can allow fog to form well inland, as documented by Fisher and Membery (1998).…”

Section: Fog and Low Cloudmentioning

confidence: 99%