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Topic: Barometric

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	The Barometric Formula
		The development of the barometric formula makes use of a number of concepts from kinetic theory, such as the ideal gas law and the associated molecular constants.
		The equation for the variation of barometric pressure with height has the form
		These pressures are considerably below those predicted by the barometric formula, which can be used to calculate variations in barometric pressure with height near the earth.
	hyperphysics.phy-astr.gsu.edu /hbase/kinetic/barfor.html (356 words)

	Effects of Barometric Pressure
		Measurement of barometric pressure is accomplished with the use of a barometer.
		Barometric pressure has been used by weathermen since the beginning of meteorology to predict the weather.
		It is important, however, to note that the effects of barometric pressure is greater in fresh and shallow waters, than it is in deeper waters.
	www.quickoneplus.com /fish/barometric.htm (826 words)

	Physiological Effects of Reduced Barometric Pressure (Site not responding. Last check: )
		In addition, the relationship of barometric pressure to altitude is influenced by other factors such as distance from the equator and season.
		West and Lahiri (1984) found that direct measurements of barometric pressure near the equator and at the summit of Mt. Everest (8,848 m) were greater than predictions based on the International Civil Aviation Organization Standard Atmosphere.
		Thus, inspired oxygen decreases with increasing altitude due to decreased barometric pressure, as shown in figure 37.5.
	www.ilo.org /encyclopaedia/?doc&nd=857100052&nh=0 (653 words)

	Manual Barometric Compensation
		If no appreciable change in barometric reading occurred, you may write in the first cell of a new column a simple calculation that subtracts the water column equivalent of your barometric reading from the submerged data file, then copy and paste this calculation to all the cells in that new column.
		In the spreadsheet, convert the barometric data column from its barometric measurement units (typically atm, mm Hg, psi, mb or kPa) to feet or meters of water column equivalent using the conversion factors in Table 10-1.
		After much experience with erroneous barometric compensation due to crimped, damp, wet and cut tubing, unacceptably slow response to small barometric change and many situations where barometric compensation was not required, we decided vented tubing did not offer the level of integrity in barometric compensation our clients deserved.
	www.solinst.com /Downloads/3001/3001Manual/ManualBarometric/3001ManualBarometric.html (1175 words)

	::: Total Measuring Instrument SPTECH Co.,Ltd.:::
		The measurement of the barometric pressure in free fi eld can register values, which differ of hundreds of pascal from the effective ones, because of wind fl uctuation and direction.
		The HD9408PS 50 static port for barometric measurements minimizes such errors, because, besides working as a fi lter (brake) against the wind dynamic pressures, it allows to the barometer to work properly, even in presence of snow or ice, as well as to conform to the WMO directions (World Meteorology Organization).
		The materials applied in manufacturing the static port are UV-resistant and can operate in the temperature range between -40°C and +80°C. The instrument is easy to install and has to be placed far from buildings, trees or any other source that might disturb the fl ow of the wind.
	www.spsystem.com /main/products/pdisplay.php?active=product&no=507&thiscode=0902 (315 words)

	Fly Fishing Science, Barometric Pressure and Fishing - MidCurrent
		A rise or fall in barometric pressure, such as with an approaching cold front, usually means a shift in the weather pattern.
		And it is the change in the weather, not any fluctuation in barometric pressure, that affects both the fish and the fishing.
		Pressure, whether in the air or in the ocean, is expressed by scientists as units of “atmosphere.” One atmosphere is defined as the pressure caused by the weight of all the overlying air at sea level—or 14.7 pounds per square inch (psi).
	www.midcurrent.com /articles/science/ross_pressure_myth.aspx (1118 words)

	A BAROMETRIC PRESSURE TIDBIT AND A PERPLEXION (Site not responding. Last check: )
		Barometric pressure is defined as the force per unit area due to earth's atmosphere.
		Sea level barometric pressure makes the assumption that an observing station is actually at sea level.
		For example, when the NWS reports a barometric pressure of 1020 mb for Denver, Colorado we know that the actual barometric pressure is much lower than this because of Denver's high altitude.
	www.theweatherprediction.com /habyhints/333 (306 words)

	Jiskha Homework Help - Features: Forum: Tidal Heights/Barometric Pressure
		Barometric pressure is not a simple thing: The pressure created by gravity on the air mass is the main cause of barometric pressure.
		They are based on studies of average barometric pressure made close to the location the tide tables are to be produced for.
		The barometric pressure at the time we are doing the calculation and the barometric pressure used to make the predictions in the first place.
	www.jiskha.com /display.cgi?id=1155888651.1155917938.1155919550.1155926708 (1226 words)

	Windy Weather 2 Project
		I knew this because the x-axis (barometric pressure) increased as the y-axis (wind velocity) decreased.
		This answered the problem because the relationship the correlation between barometric pressure and wind velocity is that as the pressure rises the wind velocity falls.
		The correlation between barometric pressure and wind velocity is that as pressure increase wind velocity decreases.
	www.qacps.k12.md.us /cms/sci/fair/projwind.HTM (1261 words)

	OutdoorsBest Forums: Fishing and Barometric Pressure
		Whatever his opinion of barometric pressure's effects on fish, you have not addressed the Mote evidence, nor did Ross in the book you cite, since it was published before Mote's discovery.
		When the barometric pressure drops, the sharks’ perceptions of how deep they are is altered, she said, which might make them feel unsafe because they think they are in shallow water.
		The barometric pressure at the water surface during a n average hurricane event would be equivalent to a fish moving up about 6 inches in the water column.
	outdoorsbest.zeroforum.com /zerothread?id=560084 (5578 words)

	RE: Barometric dampers - Heating and Air - BBS - BobVila.com
		I had a repairman out the other day and he said my barometric damper was installed backwards so I had the company who installed it come out to look.
		He said barometric dampers are only used in conjunction with swamp coolers or something to that effect and now I don't know who to believe.
		A barometric damper is used on oil burners to prevent too much draft for the burner.
	www.bobvila.com /BBS/RE_Barometric_dampers-Heating_and_Air-1-F7100.html (314 words)

	Barometric Pressure (Site not responding. Last check: )
		Barometric pressure is the pressure exerted by the atmosphere.
		I collected data (daily barometric pressure and number of each type of bird) for about a half hour for 12 days.
		I thought that falling barometric pressure would be associated with fewer birds at the feeders.
	www.birds.cornell.edu /classroombs/Research/2000/baro_pressure.html (383 words)

	Dealing with your Barometric Pressure Headache — weather the pain storm!
		Looking on the bright side, often barometric pressure headache sufferers at least have a little advance warning, especially if there is a predicted weather front moving in, or if you know you're about to go on a trip.
		Barometric pressure headache may respond particularly well to certain medications or home remedies.
		Barometric pressure headache can be tough to handle.
	www.relieve-migraine-headache.com /barometric-pressure-headache.html (875 words)

	Barometric Pressure at Race Rocks
		Barometric pressure changes with local weather conditions, making barometric pressure an important and useful weather forecasting tool.
		For forecasting purposes, the absolute barometric pressure value is generally less important than the change in barometric pressure.
		Barometric pressure is the only physical environmental cue available to a bat roosting deep within a cave.
	www.racerocks.com /racerock/abiotic/barometric/barometric.htm (972 words)

	Fishing Theories - Effect of Barometric Pressure on Fishing Success.
		It is believed that the effect of barometric pressure is greater in shallow water than deep, probably due to the pressure of the weight of the water in deep water being so high, that the air pressure above it is not relatively significant.
		Frankly, given that the pressure of water depth is such a significantly greater factor than the pressure of atmosphere, it seems likely that the weather conditions created by changes in barometric pressure, such as clouds, rain and wind, have more effect on fishing than the barometric pressure alone.
		So in the opinion of the author, barometric change is a good indicator of fishing change, but it's not because of the pressure change by itself, as much as what other weather conditions are likely to occur because of the pressure change.
	www.thefishingnut.com /link/barometer.html (854 words)

	Barometers and barometric pressure instruments - Vaisala
		Measures humidity, temperature, and barometric pressure in two accuracy classes.
		The Vaisala BAROCAP® Barometer PTB110 is designed both for accurate barometric pressure measurement at a room temperature and for general environmental pressure monitoring over a wide temperature range.
		Minimizes the errors in barometric pressure measurement caused by variations of wind speed and direction.
	www.vaisala.com /instruments/products/barometricpressure (171 words)

	Barometric Altimeter - MB Wiki
		The problem with a barometric altimeter is the requirement to calibrate it every time you start your activity.
		Combining both GPS and barometric altimeters, Garmin GPS units are able to provide the most accurate altitude readings of any handheld device.
		Absolute location is provided originally by the satellite to help auto-calibrate the barometric altimeter, then the barometric altimeter is used to provide a more stable elevation change.
	wiki.motionbased.com /mb/GPS_Barometric_Altimeter (318 words)

	Correlation between Barometric Pressure and Cosmic Ray Detection
		The purpose of this investigation is to determine the relationship between barometric pressure and cosmic ray intensity.
		Simultaneous with the count, the barometric pressure was measured at thirty second intervals.
		The relationship between the barometric pressure and the intensity of cosmic rays was found to be exponential.
	marian.creighton.edu /~besser/physics/barometer.html (1071 words)

	Life History Evolution: Bats and Barometric Pressure (Site not responding. Last check: )
		Studies were conducted to assess the response of a seasonal cave-dwelling bat and its insect prey to natural and experimental changes in barometric pressure.
		In addition, eastern pipistrelles potentially use pressure as a cue for predicting the relative abundance of aerial insect prey from outside the roost while the bat is still roosting within the cave.
		Barometric pressure tracking is viewed as an alternative evolutionary strategy to torpor and may be a widespread phenonmenon among insect-feeding bats that roost deep within caves.
	www.life.uiuc.edu /paige/bats.html (204 words)

	USATODAY.com (Site not responding. Last check: )
		A: The vertical motion of the atmosphere is often reflected in the barometric pressure that's measured at the Earth's surface.
		A: Using average sea level pressure of 29.92 inches of mercury as a point for comparison, the highest barometric pressure ever recorded in the USA was 31.85 inches in Northway, Alaska, in January 1989.
		The lowest barometric pressure ever recorded was associated with the landfall of the Labor Day hurricane in Key West, Florida in 1935, which registered a minimum pressure of 26.35 inches of mercury.
	www.usatoday.com /weather/resources/askjack/wfaqpres.htm (3234 words)

	Water Level Monitors And Automatic Barometric Pressure
		After they had gathered several years of data they were forced to view all of it with suspicion when the purchased a second barometric pressure compensation sensor for the other side of their lake and realized that the two barometric pressure monitoring sites had significant diferences as storms passed over.
		Purchasing this barometric compensation sensor should not be viewed as optional since even areas with stable pressure throughout the year vary a several millibar and at sea level it is common for pressure variations of around 80 mb or 31” of water level change throughout the year.
		This type of water level monitor, when under water, measures the water level only since changes in the barometric pressure caused by storms or elevation changes are the same on both sides of the sensor, automatically canceling each other out.
	www.wateronline.com /content/news/article.asp?docid=6516fa5a-abc3-4f03-a693-5915f25ad9bd&VNETCOOKIE=NO (728 words)

	Water level monitors automatic barometric pressure compensation
		After they had gathered several years of data they were forced to view all of it with suspicion when the purchased a second barometric pressure compensation sensor for the other side of their lake and realized that the two barometric pressure monitoring sites had significant diferences as storms passed over.
		To correctly interpret the data from these types of water level monitors the purchase of an external barometric pressure monitor is required at each site and the elevation for each monitoring site within a system must be determined.
		Purchasing this barometric compensation sensor should not be viewed as optional since even areas with stable pressure throughout the year vary a several millibar and at sea level it is common for pressure variations of around 80 mb or 31” of water level change throughout the year.
	www.globalw.com /support/barocomp.html (846 words)

	Migraine Headaches and Barometric Pressure - Associated Content
		Having grown up in barometrically stable Southern California, monitoring the level of barometric pressure in the atmosphere was not something I had ever given any thought to.
		One theory regarding the correlation between migraine headaches and barometric pressure is that the severe rise or drop in pressure that occur during a significant weather change cause the blood vessels in the brain to constrict or to dilate.
		While not all scientists currently support this theory, or in fact, support the correlation between migraine headaches and barometric pressure at all, most health care professionals I have spoken with who work with migraine headache sufferers absolutely believe that a connection exists between the changes in atmospheric pressure and the occurrence of their patients’ migraines.
	www.associatedcontent.com /article/30480/migraine_headaches_and_barometric_pressure.html (1025 words)

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