Announcement
- THERE IS NO PRIZE WITHOUT RISK!
My blog
-
Michael Jackson
Monday, Jun 29, 2009 7:10PM / Video
-
You know how ... produced thunderstorms and lightning?
Saturday, Jun 27, 2009 4:22AM / Standard Entry
The storms are one of the clearest examples of dramatic changes in humidity in the atmosphere. A storm cloud is a short duration with a great vertical development which is accompanied by thunder and lightning.
The development of a storm depends on the atmospheric instability. In this unstable situation, a mass of air begins to move up follows a rapid vertical movement. This leads to warm and moist air moves upward and the cold dry air down, thus producing a convective cloud that begins and ends as a host as a cumulonimbus. These clouds are very dense and vertical reach a size of several kilometers, which produces the typical gray color of storm clouds.
The origin of these clouds may be very varied: the strong warming in certain areas of land or the raising of the air in the mountains can be factors that create the appearance of phenomena stormy. The importance of warming in some areas of the origin of storms, is reflected in the fact that most of the storms occur at noon or early afternoon, coinciding with peak warming of the earth's surface . A part of precipitation in the form of heavy showers and hail to which the storms, the most spectacular phenomenon is certainly produce lightning. These electrical discharges are a consequence of the separation of electrical charges which takes place inside a storm cloud.
Inside a cumulonimbus is a strong current that pulls vertical upward water particles that interact with ice crystals that form inside them. This produces a separation of electrical charge that gives rise to a concentration of positive charge in the crystals in the colder upper part of the cloud and a concentration of negative charge at the bottom of the cloud. When the concentration of electrical charge is sufficient is a shock which leads to lightning. Lightning can occur between the cloud and the ground between different parts of a cloud or between clouds.
The cause of lightning that can arise between a cloud and the ground is that the base of a storm cloud is negatively charged and can induce locally an excess positive charge on the ground. This leads to an intense electric field (of the order of about 10,000 V / m), which causes an electric shock: the rayo.La first phase of the discharge is the transport of negative charge from the cloud to the ground. This current has a return flow that carries a positive charge from the ground to the cloud. At this time there is a short between the cloud and the ground resulting in a flow of negative charges to the ground and positive charges into the cloud until they are exhausted temporalmente.Estas currents cause a flash (lightning) that lasts approximately 0 , 2 seconds. Heating and expansion of the air blast close to the path of the beam, causes high intensity sound waves that cause thunder.
-
Weather Forecast
Saturday, Jun 27, 2009 4:10AM / Information
For the Asia expected precipitation for the next few days, there's a strong storm that is inside the sea, but could affect morning kitokyushu area and will move upward from Japan. In much of China will also be leading the rain run down low to moderate intensity.
In the European continent will dominate the morning rain to the north of France, also in the area of Berlin, Italy and nearby cities also rains. In the area of Spain, especially Catalonia, yesterday formed violent storms, formed a corridor of storms dumped hail the size of an egg in some areas. Today we have repeated again storm the hallway.
Here is the weather radar, and now shows some rainfall in some regions of Catalunya, in some areas are of moderate intensity.
-
willy fog
Sunday, May 24, 2009 5:16AM / Video
-
the trotamúsicos
Sunday, May 24, 2009 4:28AM / Video
Stats
- I like meteorology from the 6 years, game to the chess, likes to read, to practice martial arts,listen to music, to write, to make photos....
- Age: 26
- Gender: Female
- Total visits: 60,576
User menu
RSS feed
alivenotdead spotlight
Habitat For Humanity
- Daniel Wu - Habitat for Humanity Part 2
- Andrew Lin - Volunteer Work for Habitat Work Project.
