GGR100H1 Lecture 5: Global temperatures.docx
Document Summary
O temp=measure of molecular motion (kinetic energy of molecules: we feel it as sensible heat transfer from atmosphere, objects and our bodies, 0k=no molecular motion- absolute 0, =-273 celsius. Celsius-based on freezing and boiling points of water. Stevenson screens- to read temperature they keep the thermometer in white box, so the sun does nit heat the thermometer. This is because it takes time for the sw to become lw and heat the air, This is true in terms of months also- the shortest day of the year is also usually before the coldest day of the year. Overcast days-less insolation , colder than sunny days, however the energy lost over night is also higher, so clear days usually get colder at night- bigger range of temperatures: what determine local temperature? o. As desnity dereases there are fewer molecules available fro sensible heat transfer.
