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miriam herraiz

Introduction to my book of meteorology

I once read a book that said "We all live under the same sky but none have the same horizon. "And it's true because maybe it is raining in Huesca, but in Barcelona makes a splendid sun.

There is lots of technology and computers have greatly improved weather forecasting, but what many people do not understand is that you never reach 100% reliability.

I am not a professional meteorologist, I'm just a fan again, and I learned many things in my way, enjoying every day on this world of nature, pointing my daily predictions, looking at the sky, temperature, humidity and atmospheric pressure, especially when speak on the subject to people nearby, I express my feelings, or for example now writing because it is a passion that will always keep.

The best thing that ever happened to me is getting to know my biggest idol of the weather, Alfred Rodríguez Picó, which besides being a great meteorologist, is a great person, is doing a program every Thursday and I'm there on my TV see and learn new things, he can transmit feelings that , I get to the heart causes can have even more passion. He's like my teacher and I really enjoy.

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You know how ... produced thunderstorms and lightning?

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.


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miriam herraiz


A record historic of the city of Barcelona, the highest temperature recorded since 2003, on August 28, 2010, with a temperature of 37'8 ° C ...Read more

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