European Stars and Stripes (Newspaper) - January 20, 1969, Darmstadt, Hesse                                Daily Magazine a Sweet Europe frequently gels socked in with shallow but dense radiation fog. Up editor s note on his Way to work one morning staff writer j. King Cruger found himself in a virtually impenetrable fog. Pulling his 1924 Maxwell sports Ter into a convenient beet Patch he waited either for the Sun to Burn the fog off or Forit to lift and become Cloud. Unwilling to let the standby time go to waste he decided to illuminate the fog Situa Tion something that is sorely needed. By  Cruger staff writer yes Virginia there is still a snout there somewhere. The fog will someday go away. When Well that difficult to pinpoint. But fight those increasingly Strong suicidal tendencies brought on by scores of Gray depressing Days and Pray for cold weather. Because at this time of year cold weather is the Only Chang that can be reasonably expected to Chase away the fog for a few Day anyway. The fog now periodically socking it to Germany and the Benelux countries wreaks the same havoc As its ghostly English Cousin but is caused by different conditions. For what it s Worth the fog Smoth ering your usual sunny disposition grounding your flight causing your car to move with the rapidity of a Cater pillar and aggravating your bronchial condition is a different Breed of cat on the continent from that in the sceptred Isle. London t famous fogs Are advection fogs and Are common to coastal  air passing Over cold water is its most frequent cause. Advection fog canals occur behind a cold front system the air moving Uphill from the Ocean cools condenses and forms fog. It moves in As a Low Cloud then descends to Earth at night. Advection fogs Are individually Apt to be widespread Dens and deep especially Over the cold Ocean Waters. Occasionally this Type of fog moves through France and the Benelux countries into Central Germany. London s omfeti0n for caused by warm air passing Over cold water. Key Stone the shroud like stuff in German that comes creeping on those Little cat feet is usually radiation fog. It is also known As ground fog. Radiation fogs Are usually shallow though dense the sky is often visible ground fog and they generally Are restricted to valleys marshes and Low ground. However the High radiation fogs of Western Europe Are extensive deep. Dense and persist for Days whereas ground radiation fogs Are usually nocturnal  fog usually follows a High pressure system when Days Are Brig tand Clear and the cloudless night sky is studded with stars. Heat from the grounds lost rapidly As night closes in. As the heat radiates from Earth the tempera Ture drops and moisture in the air condenses in the form of  vapor or fog normally settles first in Low areas and usually increase sin depth until higher ground is engulfed. The depth depends on How much Mois Ture exists and How Long the night is. Beat lifts the fog Bat during the Short Days of Winter ube Sun s rays come in to an oblique Angle with insufficient warmth to barn off Che fog. If he fog the too dense to be horned Oil the Vapo merely lifts hit and it Contes a stratus Cloud. This accounts for the Gray Winter atmosphere so Many people find de fliers especially Are familiar with an other Type of fog common to the continent. This is called High inversion fog and blankets Large areas but it does t Settle in Low pockets like radiation  can generally dive through this fog and come i for a Landing wit plenty of visibility. This same High inversion fog is the stringy stuff that clings to Mountain roads and presents a Hazard to motorists crossing High passes. The dissipation of such fogs requires warming up of me Cool surface layer by heating from below until the Inver is obliterated or a mixing. Up of the layer with the warmer and drier air above through increase in the Speed of the wind. Warming May take Placebo the Sun s rays penetrating the fog or by the foggy air being blown onto warmer regions. More and denser fog can be expected when foggy Days go by with no change in the air. Smoke exhaust fumes another gases contribute to this buildup. The fog tends to get thicker each  thick fog May turn into a drizzle when the water droplets become larger but it won t be enough of a drizzle to be called  other types of fog frontal steam and ice Are encountered far Les frequently. Frontal fog results from saturation of the air by rain falling through it from an extensive higher Cloud system associated with a travelling cyclonic Dis  fog is relatively rare and Short lived it results from the rapid evaporation of a very cold open water surface into warm air Drifting Over it. A fog of Fine ice crystals ice fog appears in Winter around some Arctic settlements and airfields whenever hydrocarbon fuels Are burned and the temperature goes below minus 25 or minus30 degrees. I monday january 20, 1969 the stars and stripes to True that heat is necessary to disperse existing fog. But for longer lasting Relief cold cold weather is re  is a tendency for the probability of fog formation to decrease at Low temperatures largely because of the very Low water Content of cold air mass Sand the unfavourable effects of Snow cover and atmospheric circulation conditions where very Low temperatures pre Vail. Fogs composed of water drops be come rare at temperatures below minus 15 degrees and Well Inland practically none occur Between minus 15 and minus 25 degrees. It s simply a question of whether you want to be Able to Start your car and then be unable to drive because of the fog or would rather have it too cold for the car to Start in that Crisp unlimited visibility weather. 11