Learning about and experiencing the marine layer

My EPS 9 (Solar Systems and Planets) class has taken a recent break from astrology to focus on Earth’s atmosphere. In doing so we have looked at the marine layer. This occurs when an air mass forms over the surface of a cool ocean or lake. Because this body of air is higher in density than the warm air above, it becomes trapped below forming a flat layer (NOAA 2011).

This is not a rare phenomenon in Southern California where cool waters moving down from Alaska allow the marine layer to form. Due to a high pressure gradient from desert heating, the marine layer often moves inland engulfing much of the coast in heavy fog.

Last week exactly this happened. For two days Los Angeles became grey and cloudy with poor visibility. While locals find this deeply disturbing, I found it fantastic for two reasons: first it gave us a respite to the glaring sun which has been belching out days with high’s of 27ºC. Secondly because it was very exciting to experience a weather event that, only a few days prior, we had learned about in class.

Un unusual view of UCLA with the marine layer blocking out the Sun

UCLA is not just a brilliant place to study geography; it is also situated in an extraordinarily interesting region to study the geography of, both human and physical. This was one of my key motivations for choosing it as my host university for studying abroad. I am glad that, through my EPS class, I have had yet another chance to engage with my geographical studies first hand.

References

NOAA (2011) ‘The Marine Layer’ (WWW), Silver Spring: NOAA (http://www.srh.noaa.gov/jetstream/ocean/marine.htm; 26 February 2016).