02.27.13



Coriolis effect 

The Coriolis effect is an intertial force, it is a deflection of moving objects.
The two reasons for the coriolis effect are

• the Earth rotates eastward
• the tangential velocity of a point on the Earth is a function of latitude

Jet Streams

Jet streams are fast flowing, air currents found in the atmospheres.

Trade Winds

The trade winds are the prevailing patterns of easterly surface winds found in the tropics.The trade winds blow predominantly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere.

Cyclones

A cyclone is an area of closed, circular fluid motion rotating in the same direction as the Earth.

Anticyclones

An anticylcone is the oppisite of a cyclone, it is a weather phenominon. they are defined as as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere.



20130130 earth observatory

artical one : snow turns the talkimakan desert white

 On January 2, 2013 NASA's aqua satelite discovered snow on one of the worlds hottest, and sandiest desert. It was unusal to find snow this desert covered in snow,but they said it flew in from a storm on December 26. The CNTV reported that it was among the hardest hit.

article two : tropical cyclone dumile

this tropical dumile storm formed in the begining of this year, 2013. This storm began in the Indian Ocean, east of madagascar and moved southward. It became bigger and stregnthed to a tropical cyclone. It extended over the islands of Réunion and Mauritius but stopped short of Madagascar’s capital city of Antananarivo.

article three : snow across the Great Britain

snow covered most of great britain and expanded from london to the nothern tip of scotland. only a bit of the island was free.