Hi, I'm Jerome Vidry. I live in Montreal since 2007.

PHP Developer since 2005. I worked on any kind of projects, from basic website, to more complex systems, including mobile applications.
I have a deep knowledge of PHP capabilities and I am able to solve any kind of problem.

I am able to lead a project, from the conception, to the delivery, managing the development of the different modules.

Find more about my previous work in my Portfolio.

Contrail Shadow X

What created this giant X in the clouds? It was the shadow of contrails illuminated from below. When airplanes fly, humid engine exhaust may form water droplets that might freeze in Earth's cold upper atmosphere. These persistent streams of water and ice scatter light from the Sun above and so appear bright from below. On rare occasions, though, when the Sun is near the horizon, contrails can be lit from below. These contrails cast long shadows upwards, shadows that usually go unseen unless there is a high cloud deck. But that was just the case over Istanbul, Türkiye, earlier this month. Contrails occur all over planet Earth and, generally, warm the Earth when the trap infrared light but cool the Earth when they efficiently reflect sunlight. The image was taken by a surprised photographer in the morning on the way to work.