[Bass Zone] Presion Barometrica......

[sergio]

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Me mandaron este mail que me parecio muy interesante, sobre todo en esta temporada de cambios climatologicos, si alguien lo puede traducir y mandarlo de nuevo estaria mejor para que todos lo entendieran, al final biene como hacer un barometro casero. Como afecta la precion barometrica a la pesca.   Barometric Pressure And Fishing By: Stu Valentine Most of us are not scientific anglers.  In fact, the majority of us probably go fishing when we can, not necessarily when we should.  For example, many fishermen choose to go fishing on warm, sunny days when there is no chance of rain.  On the surface this strategy sounds very reasonable. But is it? There is a body of evidence which indicates that this may, indeed, be the worst time to try to catch fish.  This is because the high (barometric) pressure conditions which give rise to these beautiful days are not the times when fish are stimulated to aggressively feed.  They still feed, but they can be difficult to locate and to entice. What is barometric pressure? Barometric pressure is the pressure of the air that's pressing in all directions. The air's pressure is caused by the weight of all the air above the ground pressing down - gravity pulls air toward the earth just as it pulls everything else. Its called barometric pressure because the air pressure is measured by an instrument called a barometer. On the average, at sea level, the air has a pressure of 14.7 pounds per square inch. Instead of using pounds per square inch, barometers in the U.S. measure the pressure in inches of mercury. This is how high the pressure can force mercury into a tube that has the top sealed of from the air, a reading of 29.92 inches is the same as 14.7 pounds per square inch. When are fish most active? Our experience has shown that fish feed more actively as the barometric pressure is steady or rising steadily (between 29.90 and 30.40 inches), or fluctuating rapidly. Falling barometric pressure means that clouds & precipitation are likely. Rising air pressure (especially above 30.10 inches) signals that clear sunny weather is to be expected. Often, right before a storm the barometric pressure will slightly rise, and then steadily drop, only to rise again once the storm passes. When a weather front is approaching (falling barometer) , such as the rain and wind we've had recently, it's more than likely the fish aren't going to bite. The same thing is true when a weather front is clearing, but it's not as drastic. But immediately following the passing of the front, as the barometer rises, the fish feed very aggressively and will continue to feed until the barometer begins to fall. It is not known why fish feed more during these time of changing barometric pressure.  But our experience verifies this fact.  We always check the barometric pressure trends after a fishing trip to see how the pressure related to our catch.  Invariably, we catch more fish when the barometric pressure is steady (but not above 30.40 inches or so), rising steadily, or fluctuating rapidly (such as when rain storms come and go). When should I go fishing? First, avoid going fishing when a high pressure system is lingering.  Instead,  plan to go swimming or for a drive on those sunny, cloudless days.  Second, pay attention to the weather and try to anticipate when the barometric pressure will be rising.  Visit our Weather Center to check the barometric pressure trends for your fishing areas. Lately, Dale and I have changed our fishing strategy.  We are now purposely planning our trips when the forecast calls for rain.  The result is that our catches have increased dramatically.  Ironically, we are also increasing the risk of being struck by lightning. So we must be sure to get off the water quickly if conditions are too threatening.   Como hacer un barometro casero....   What do I Need?      An empty coffee can      A large balloon      A large rubber band, one that will fit snugly around the coffee can      A pin      Glue      Straw      Paper  What Do I Do?      First, as an experiment, blow up the balloon. Think about how the more air there is in the balloon, the more pressure it exerts outward. This is what makes the balloon bigger as you blow it up.      Cut a large piece of the balloon and stretch it over the coffee can. Hole the balloon in place with a rubber band stretched around the can, over the balloon. Make sure there is a tight seal around the rubber band. Any air leaks around the piece of balloon will affect how well your barometer will work.      Use a little glue (not hot melt) and attach the straw to the piece of balloon over the can. Then use a little more glue and attach the pin to the other end of the straw (see diagram.)      Take a piece of paper and place some regularly spaced lines on it.      Set up the can and paper as shown in the diagram. Outside will work better than inside. Using Your Barometer      Make several daily recording for about a week. Make notes about the weather when you take the readings. What do you notice about the readings and the weather? Compare the readings of the barometer outside with those of a barometer inside.       Sergio Herrera G. Gerente de Sistemas Tanjore Corp. 8020 San Lorenzo Dr. Laredo Tx. 78045 Tel. (956) 722-6836   Fax.- (956) 722-7138

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