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Topic: Air mass

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In the News (Fri 26 Apr 19)

  Malta Weather Information
An air mass is a body or ‘mass’ of air in which the horizontal gradients or changes in temperature and humidity are relatively slight.
As we have seen, it is in the source regions that the air mass acquires distinctive properties that are the characteristics of the underlying surface.
As an air mass moves away from its source region towards the British Isles, the air is further modified due to variations in the type or nature of the surface over which it passes.
www.maltaweather.info /airmasses.html   (859 words)

 air mass - HighBeam Encyclopedia   (Site not responding. Last check: 2007-10-09)
AIR MASS [air mass] large body of air within the earth's atmosphere in which temperature and humidity, although varying at different heights, remain similar throughout the body at any one height.
Air masses form over parts of the earth's surface called source regions, which are large bodies of water or landmasses with relatively uniform topography, often ranging hundreds of thousands of square miles in area.
The boundaries between air masses, called fronts, are, typically, zones of rapid transition from cold to warm or from dry to moist air.
www.encyclopedia.com /doc/1E1-airmass.html   (376 words)

 Air mass - Wikipedia, the free encyclopedia
In meteorology, an air mass is a large volume of air having fairly uniform characteristics of temperature, atmospheric pressure, and water vapor content.
The temperature characteristics of an air mass are defined by the terms Arctic, Polar and Tropical, with arctic being the coldest and tropical being the warmest.
Maritime air is a moist air mass, whereas Continental air is relatively dry.
en.wikipedia.org /wiki/Air_mass   (412 words)

 Air Masses
Air masses are relatively large bodies of air that are fairly horizontally uniform in characteristics.
Air Masses That Affect the Continental U.S. Air masses are relatively large bodies of air that are fairly horizontally uniform in characteristics.
Air masses form in "source regions" where there is little topography and relatively stagnant winds near the surface.
okfirst.ocs.ou.edu /train/meteorology/AirMasses.html   (589 words)

 Summer Air Masses
A recently developed continental-scale air mass-based classification is used to identify occurrences of six air masses (dry polar, dry temperate, dry tropical, moist polar, moist temperate, and moist tropical) at 126 locations east of the Rocky Mountains for summer from 1961-1990.
An air mass is a large volume of air, "...acquiring characteristics of temperature and humidity related to the condition of the sea, land or ice beneath it" (Crowe, 1971).
This air is found in the warm sector of a mid-latitude cyclone, or on the western flank of a subtropical anticyclone.
www.udel.edu /SynClim/sumssc.html   (5531 words)

 Weather Elements: Air Masses: A Base for Weather Analysis
Since the air masses of concern often are hundreds or thousands of kilometres away, the weather forecasters must rely on a variety of measurements (such as temperature and humidity) to tell them of the "taste" and "bouquet" and "colour" of the various air masses.
Air masses acquire their characteristic temperature and moisture (or absolute humidity) signature from the source regions over which they are born.
Such air masses break southward across Canada and the USA during winter, but very are rarely seen at lower latitudes during the summer because the 24-hour sun warms the Arctic region considerably and the polar front and accompanying jet stream generally remains at higher latitudes.
www.islandnet.com /~see/weather/elements/airmasses.htm   (2294 words)

 Air Masses
Air masses are defined according to both their region of origin and their course travelled.
As a general rule, maritime air masses are generally fairly moist, containing considerable amounts of water vapour, which is ultimately condensed and released as rain or snow.
Once an air mass moves out of its source region, it may be modified as it encounters surface conditions different to those found in the source region.
www.ace.mmu.ac.uk /eae/Climate/Older/Air_Masses.html   (283 words)

 Air Mass
The Air Mass quantifies the reduction in the power of light as it passes through the atmosphere and is absorbed by air and dust.
The above calculation for air mass assumes that the atmosphere is a flat horizontal layer, but because of the curvature of the atmosphere, the air mass is not quite equal to the atmospheric path length when the sun is close to the horizon.
At sunrise, the angle of the sun from the vertical position is 90° and the air mass is infinite, whereas the path length clearly is not.
www.udel.edu /igert/pvcdrom/SUNLIGHT/AIRMASS.HTM   (588 words)

In the winter this air mass is shoved toward the equator but in summer it can cover much of the US east of the Rockies.
Temperatures in this air mass warm to highs in the 80's and 90's in the summer and the 70's and 80's in winter.
This air mass is notorious for producing fog, drizzle, cloudy weather and long lasting light to moderate rain.
www.theweatherprediction.com /basic/airmass   (1624 words)

 Air Temperature and Air Mass Movement
Air masses are classified based on the temperature and humidity at their source region.
For air masses, the polar source region is approximately 60 degrees north or south latitude.
The influence that air masses have on the temperature of a place depends the location with respect to the source of the air mass and the trajectory of the air mass as it moves from its source region.
www.uwsp.edu /gEo/faculty/ritter/geog101/textbook/temperature/temperature_air_masses.html   (460 words)

 air masses   (Site not responding. Last check: 2007-10-09)
An air mass is by definition a large segment of the atmosphere which is characterized by similarities in its weather elements, often referred to as homogeneity.
As pressure cells, from the air mass source regions move across the nation in the prevailing westerlies, they are altered and modified, by their contact with surfaces whose characteristics are different than their original locations.
Air masses originating over land are most often modified with respect to their temperatures, with the cA and cP air masses warming as they move southward, while the cT air masses may cool slightly as they move latitudinally.
www.ux1.eiu.edu /~cfrlw/For/Unit2/airmass.html   (755 words)

 Air Masses and Fronts | World of Earth Science
The movement of air masses across the earth's surface is an important component of the weather that develops in an area.
From the south, mT air masses based in the Gulf of Mexico, the Caribbean, and western Atlantic Ocean move northward across the southern states, bringing hot, humid weather that is often accompanied by thunderstorms in the summer.
The boundary between the air masses in this case is known as a stationary air mass and is designated on a weather map by a solid line with triangles and half circles on opposite sides of the line.
www.bookrags.com /research/air-masses-and-fronts-woes-01   (1433 words)

 Air Masses: scaffolding activity
An air mass is a large body of air with similar temperature and moisture properties throughout.
As an air mass moves away from its source region, it is modified as it encounters conditions different than those found in the source region.
The purpose of this activity is to introduce air masses that commonly influence the weather in the United States, characteristics of these air masses, and how to identify air masses on weather maps.
ww2010.atmos.uiuc.edu /(Gh)/guides/crclm/act/arms.rxml   (451 words)

 Air mass types
Continental polar (cP) air is considered a cold and dry air mass that is warmer than the arctic air mass located to the north.
Maritime tropical (mT) air masses are warm and moist air masses that are responsible for much of the precipitation east of the Rocky mountains in the United States.
Convection and convergence of this air mass in the Intertropical Convergence Zone is one for the reason for the heavy rainfall experienced in the rain forests of this region.
www.uwsp.edu /geo/faculty/ritter/geog101/textbook/weather_systems/air_masses_types.html   (483 words)

 7(r) Air Masses and Frontal Transitional Zones
An air mass is a large body of air of relatively similar temperature and humidity characteristics covering thousands of square kilometers.
Typically, air masses are classified according to the characteristics of their source region or area of formation.
The sloping of warm air over the cold air leads to a forced uplifting (frontal lifting) of the warm air if one air mass is moving toward the other.
www.physicalgeography.net /fundamentals/7r.html   (794 words)

 Oncourse - WX6 Air Masses and Fronts   (Site not responding. Last check: 2007-10-09)
Because air masses tend to have their own characteristic weather, it is useful to be able to refer to them by a name.
In the winter, this air mass seldom raches as far north as Canada on or near the earth's surface, although it may be found at higher levels in the atmosphere.
If the two air masses are lying adjacent to one another and the wind field is such that it tightens the temperature gradent in the zone between them, a front can form.
www.vnwa.com /Oncourse/Met/WX6Airmasses.htm   (1453 words)

 Glossary of Terms: A
Absolute humidity is the mass of water vapor in a given volume of air (this measurement is not influenced by the mass of the air).
Air masses develop their climatic characteristics by remaining stationary over a source region for a number of days.
Air masses are classified according to their temperature and humidity characteristics.
www.physicalgeography.net /physgeoglos/a.html   (2710 words)

 Big Bronco Mass Air Conversion Info - Ford at Off-Road.com
Mass air EFI is usually what is called SEFI (Sequential Electronic Fuel Injection), which has one separate wire for each injector and fires them twice for every power stroke of the engine.
The stock mass air sensor is pretty big, so you will probably run out of injector before needing a mass air sensor swap.
Stock mass air sensor on 95 CA models is 70 mm, which should flow well over 400 HP.
www.off-road.com /ford/bigbroncos/tech/massair.html   (1198 words)

 [No title]
Air Mass is an extremely large body of air whose properties of temperature and moisture content (humidity), at any given altitude, are fairly similar in any horizontal direction.
In the case of the Pacific NW mountains force the air to rise (orographic lifting) causing rain.
Air masses can control the weather for a relatively long time period: from a period of days, to months.
cimss.ssec.wisc.edu /wxwise/class/frntmass.html   (582 words)

 Air Masses and Fronts   (Site not responding. Last check: 2007-10-09)
An air mass is a large "blob" of air with similar characteristics throughout.
Air masses are named according to their moisture and temperature characteristics.
Fronts are the boundaries between air masses, marking the edges of individual air masses.
www.geocities.com /CapeCanaveral/7639/atmosphere/airmass.htm   (527 words)

 Speed Density to Mass Air Conversion. F150, Bronco, Mustang.
Mass air flow (MAF) systems evolved later and are highly adaptable because they directly measure the volume of air going into the engine.
The mass air flow meter mounts between the air filter and throttle body, and consists of a pair of small wires located within a calibrated housing.
The amount of air flow through the meter and the temperature of the air results in cooling of the wires.
www.fordmuscle.com /archives/2005/10/MassAirConversion/index.php   (1898 words)

 JetStream - An Online School for Weather: North American Air Masses
An air mass is a large body of air with generally uniform temperature and humidity.
Air mass source regions range from extensive snow covered polar areas to deserts to tropical oceans.
In the occluded front, the cold air undercuts the cooler air mass associated with the warm front, further lifting the already rising warm air.
www.srh.weather.gov /srh/jetstream/synoptic/airmass.htm   (765 words)

Ordinary convective cells are exemplified by air mass thunderstorms.
Air mass thunderstorms are usually described as 'popcorn convection' or 'pulse storms' because of their random, bubbled appearance in radar reflectivity images.
CAPE that is concentrated in the lower and mid-levels produces stronger updrafts (storms) because acceleration of the parcel is maximized, entrainment of stable air is minimized, and the affects of precipitation loading are minimized (Kreighton et al.
www.hprcc.unl.edu /nebraska/airmass.html   (1022 words)

 air mass - Search Results - MSN Encarta   (Site not responding. Last check: 2007-10-09)
An air mass is a body of air that extends over a large area and has nearly uniform temperature and humidity in any horizontal direction.
The coastal area to the north of Split is characterized by a so-called Adriatic climate, which differs from the Mediterranean chiefly by the...
Generally, the upper-level winds move air masses from one region to another.
encarta.msn.com /air+mass.html   (159 words)

 Air Masses: uniform bodies of air
In contrast, continental polar air masses (cP), which originate over the northern plains of Canada, transport colder and drier air southward.
Once an air mass moves out of its source region, it is modified as it encounters surface conditions different than those found in the source region.
For example, as a polar air mass moves southward, it encounters warmer land masses and consequently, is heated by the ground below.
ww2010.atmos.uiuc.edu /(Gh)/guides/mtr/af/arms/home.rxml   (147 words)

 Mass flow sensor - Wikipedia, the free encyclopedia
A mass flow sensor responds to the amount of a fluid (usually a gas) flowing through a chamber containing the sensor.
A mass airflow sensor is used to determine the mass of air entering the engine.
Air is a gas, and its density changes as it expands and contracts with temperature and pressure.
en.wikipedia.org /wiki/Mass_air_meter   (858 words)

 Air Masses and Fronts: online meteorology guide
The purpose of this module is to introduce air masses, where they originate from and how they are modified.
Clashing air masses in the middle latitudes spark interesting weather events and the boundaries separating these air masses are known as fronts.
Air masses that commonly influence weather in the United States.
ww2010.atmos.uiuc.edu /(Gh)/guides/mtr/af/home.rxml   (196 words)

 USATODAY.com   (Site not responding. Last check: 2007-10-09)
These air masses are the ones responsible for bringing clear and pleasant weather during the summer to the North.
Maritime tropical air masses are most common across the eastern USA and originate over the warm waters of the southern Atlantic Ocean and the Gulf of Mexico.
The "K" means that the air moving across a region is colder than the land surface temperature while "W" indicates that the air is warmer than the land surface temperature.
www.usatoday.com /weather/tg/wamsorce/wamsorce.htm   (483 words)

 Read About Air Masses   (Site not responding. Last check: 2007-10-09)
The air that is carried by prevailing winds moves as a unit.
In general, air masses form either over land or over water and near a polar region or near the tropics.
A tropical air mass is one that forms near the Tropic of Cancer or the Tropic of Capricorn.
schoolscience.rice.edu /duker/readairmass.html   (278 words)

 Honda Air Flow Mass Meter at Drivewire.com
The air mass meter is located in the engine compartment usually adjacent to the air filter assembly.
The Honda air mass meter or sometimes called the air flow meter is used to determine the airflow that is being delivered to your engine.
The air mass meter does this by sending an electronic signal to the cars computer, and thus sends the correct signal to the fuel injectors that regulate the amount of fuel that is delivered to the engine.
www.drivewire.com /hondaparts/airflowmassmeter.html   (419 words)

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