The video above shows the city's fog in all its inexorable glory as it rushes between the hills and over the bay like a rising tide. Christen's time-lapse effect makes the city's airplanes look like fireflies in the night sky.
Born in Switzerland and currently living in Oakland, Christen made the 45-minute trip to the Marin Headlands countless times to catch the fog at dawn.
The 32-year-old photographer (who is also an animator for Pixar Studios) told The Huffington Post in an email Monday just how time-consuming a project like this can be. Between the filming and the laborious post-production work of getting rid of tiny flickers, specks and frame pops, he said it took him hundreds of hours over the course of three years to make the short, beautiful film.
We'd say it was worth it.