The following present a collection of videos/animations related to my fog research. More content continually added, so please check back!
Observing Shallow Fog at Very High Resolution
A recording of the presentation delivered at the 23rd Symposium on Boundary Layers and Turbulence (June 2018) can be found here. This presentation was awarded one of the "Outstanding Student Oral Presentation" awards at the conference
A recording of the presentation delivered at the 23rd Symposium on Boundary Layers and Turbulence (June 2018) can be found here. This presentation was awarded one of the "Outstanding Student Oral Presentation" awards at the conference
Take Off in Thick Fog
On 21 December, 2017, my wife and I went on a trip to the UK. Imagine my delight when our departing flight from Schiphol was delayed by almost an hour due to fog! (I think I was probably the only passenger excited by this news...). The fog layer was approximately 200 m deep, with the top clearly visible as we broke through around the 45 s mark in the video. You can see the variability in the fog layer throughout the climb, with varying thickness - at times, the tip of the wing can't even be seen!
For some more videos of airplanes in fog, check out these awesome clips!
Airplanes landing in thick fog conditions and near-zero visibility at London Gatwick airportAirbus A320 pilots' view ILS Approach CAT III LOWW-VIE in bad weather
For some more videos of airplanes in fog, check out these awesome clips!
Airplanes landing in thick fog conditions and near-zero visibility at London Gatwick airportAirbus A320 pilots' view ILS Approach CAT III LOWW-VIE in bad weather
Radiation Fog
As part of a field experiment to observe near-surface fog at very high resolution, we used a GoPro camera and an LED strip to estimate nocturnal visibility. The time lapse above shows the onset, growth, and eventual dissipation of a radiation fog layer during the experiment. For more see: Fog at High Resolution.
Observations at Cabauw for a "Typical" Radiation Fog Event in September 2016
The above video represents a "typical" radiation fog event shown in the observations at Cabauw during the night between 26-27 September, 2016. With the setting of the sun, the surface cools and the air becomes saturated, forming a fog layer that only dissipates after the sun has risen again in the morning. Calm winds, clear skies, and a stable boundary layer provide ideal conditions for surface cooling and fog formation.
In the video, the left panel is the relative humidity profile (green) at the different observation heights (red dots), with white indicating fog as the inverse of visibility. The middle panel shows the temperature profile with red and blue indicating positive/negative radiation at the surface, respectively. Wind speed and direction as well as other properties are shown on the right.
In the video, the left panel is the relative humidity profile (green) at the different observation heights (red dots), with white indicating fog as the inverse of visibility. The middle panel shows the temperature profile with red and blue indicating positive/negative radiation at the surface, respectively. Wind speed and direction as well as other properties are shown on the right.
A Firework-Induced Fog
The Dutch seem to be particularly fond of fireworks. The above video shows the effect of an increase in aerosols when the air is moist and stable. The sudden increase in aerosols from the fireworks provides ample condensation nuclei for fog formation.
The video is a time lapse representing roughly 10 minutes from the start of 2017. Visibility over the period drops to roughly 50 m.
(apologies for the video quality - I need a better camera!)
Check out this video, too, of fireworks in the fog in Munich - it's much cooler!!
https://www.youtube.com/watch?v=9uI64s3WA70
The video is a time lapse representing roughly 10 minutes from the start of 2017. Visibility over the period drops to roughly 50 m.
(apologies for the video quality - I need a better camera!)
Check out this video, too, of fireworks in the fog in Munich - it's much cooler!!
https://www.youtube.com/watch?v=9uI64s3WA70