Foehn wind 3) Mechanical mixing: When river water passes over rocks, turbulence is generated in the form of rapids, and white water reveals the turbulent mixing of the water with the air above. Similarly, as air passes over mountains, turbulence occurs and the atmosphere is mixed in the vertical. This mixing generally leads to a downward warming and upward moistening of the cross-mountain airflow, and consequently to warmer, drier foehn winds in the valleys downwind. 4) Radiative warming: Dry foehn conditions are responsible for the occurrence of rain shadows in the lee of mountains, where clear, sunny conditions prevail. This often leads
Antarctica Weather Danger Classification Antarctica Weather Danger Classification The weather in Antarctica can be highly variable, and weather conditions will oftentimes change dramatically in a short period of time. There are various classifications for describing weather conditions in Antarctica; restrictions given to workers during the different conditions vary by station and nation. An air temperature of or below would meet the criteria for Condition 2. And an air temperature of or colder would meet the criteria for Condition 1. However, the coldest temperature ever recorded at McMurdo Station was . So reaching would be unlikely to occur, and reaching would be virtually impossible. However,