Atmospheric pressure
Atmospheric pressure , sometimes also called barometric pressure , is the pressure within the atmosphere of Earth (or that of another planet). The standard atmosphere (symbol: atm) is a unit of pressure defined as 1013.25 mbar (101.325 kPa ), equivalent to 760 mmHg ( torr ), 29.92 inches Hg , or 14.696 psi . [1] The atm unit is roughly equivalent to the mean sea-level atmospheric pressure on Earth.
Page Revisions
| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
85537 characters 12 sections 19 paragraphs 14 images 254 internal links 33 external links |
pressure 0.532 sea 0.243 inhg 0.240 kpa 0.235 atmospheric 0.230 level 0.187 mbar 0.174 hpa 0.147 barometric 0.147 101 0.121 atm 0.116 weather 0.113 cm2 0.110 transmitted 0.096 1013 0.088 |
Atmospheric pressure , sometimes also called barometric pressure , is the pressure within the atmosphere of Earth (or that of another planet). The standard atmosphere (symbol: atm) is a unit of pressure defined as 1013.25 mbar (101.325 kPa ), equivalent to 760 mmHg ( torr ), 29.92 inches Hg , or 14.696 psi . [1] The atm unit is roughly equivalent to the mean sea-level atmospheric pressure on Earth. |
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| 2017 |
95273 characters 13 sections 19 paragraphs 15 images 313 internal links 31 external links |
pressure 0.517 inhg 0.262 atmospheric 0.241 kpa 0.231 sea 0.226 level 0.172 mbar 0.166 hpa 0.161 barometric 0.161 weather 0.124 transmitted 0.105 atm 0.101 adjusted 0.095 millibars 0.093 cm2 0.090 |
Atmospheric pressure , sometimes also called barometric pressure , is the pressure within the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. As elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation. Pressure measures force per unit area, with SI units of pascals (1 Pa = 1 N/m 2 ). On average, a column of air one square centimetre [cm 2 ] (0.16 sq in) in cross-section, measured from sea level to the top of the Earth's atmosphere, has a mass of about 1.03 kilograms (2.3 lb) and weight of about 10.1 newtons (2.3 lb f ). That weight (across one square centimeter) is a pressure of 10.1 N/cm 2 or 101 kN/m 2 (kPa). A column 1 square inch (6.5 cm 2 ) in cross-section would have a weight of about 14.7 lb (6.7 kg) or about 65.4 N. |
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| 2016 |
90634 characters 12 sections 18 paragraphs 14 images 305 internal links 27 external links |
pressure 0.521 inhg 0.302 atmospheric 0.243 sea 0.227 kpa 0.207 level 0.173 mbar 0.167 barometric 0.162 hectopascals 0.141 weather 0.125 transmitted 0.106 atm 0.102 hpa 0.097 adjusted 0.096 millibars 0.094 |
Atmospheric pressure , sometimes also called barometric pressure , is the pressure exerted by the weight of air in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low-pressure areas have less atmospheric mass above their location, whereas high-pressure areas have more atmospheric mass above their location. Likewise, as elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation. On average, a column of air one square centimetre [cm 2 ] (0.16 sq in) in cross-section, measured from sea level to the top of the atmosphere, has a mass of about 1.03 kilograms (2.3 lb) and weight of about 10.1 newtons (2.3 lb f ). That force (across one square centimeter) is a pressure of 10.1 N/cm 2 or 101,000 N/m 2 . A column 1 square inch (6.5 cm 2 ) in cross-section would have a weight of about 14.7 lb (6.7 kg) or about 65.4 N. |
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| 2015 |
90415 characters 12 sections 18 paragraphs 14 images 306 internal links 27 external links |
pressure 0.496 inhg 0.282 atmospheric 0.227 sea 0.225 kpa 0.217 barometric 0.181 level 0.172 hectopascals 0.165 mbar 0.156 qnh 0.141 hpa 0.121 qfe 0.117 mmhg 0.117 millibars 0.117 weather 0.116 |
Atmospheric pressure is the pressure exerted by the weight of air in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. On a given plane, low-pressure areas have less atmospheric mass above their location, whereas high-pressure areas have more atmospheric mass above their location. Likewise, as elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation. On average, a column of air one square centimeter in cross-section, measured from sea level to the top of the atmosphere, has a mass of about 1.03 kg and weight of about 10.1 N (2.28 lb f ). (A column one square inch in cross-section would have a weight of about 14.7 lbs, or about 65.4 N.) Atmospheric pressure is sometimes called barometric pressure. |
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| 2014 |
91237 characters 12 sections 19 paragraphs 13 images 304 internal links 26 external links |
pressure 0.497 inhg 0.277 sea 0.245 atmospheric 0.223 kpa 0.214 level 0.188 hectopascals 0.162 mbar 0.153 barometric 0.148 qnh 0.138 weather 0.129 hpa 0.119 qfe 0.115 mmhg 0.115 millibars 0.115 |
Atmospheric pressure is the force per unit area exerted on a surface by the weight of air above that surface in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. On a given plane, low-pressure areas have less atmospheric mass above their location, whereas high-pressure areas have more atmospheric mass above their location. Likewise, as elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation. On average, a column of air one square centimeter in cross-section, measured from sea level to the top of the atmosphere, has a mass of about 1.03 kg and weight of about 10.1 N (2.28 lb f ) (A column one square inch in cross-section would have a weight of about 14.7 lbs, or about 65.4 N). |
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| 2013 |
90963 characters 12 sections 21 paragraphs 13 images 301 internal links 24 external links |
1. Standard atmospheric pressure 3. Altitude atmospheric pressure variation 4. Local atmospheric pressure variation 5. Atmospheric pressure records 6. Atmospheric pressure based on depth of water |
pressure 0.529 sea 0.249 inhg 0.234 atmospheric 0.233 kpa 0.206 level 0.192 hectopascals 0.157 mbar 0.148 barometric 0.143 barometers 0.134 qnh 0.134 weather 0.124 hpa 0.115 qfe 0.111 mmhg 0.111 |
Atmospheric pressure is the force per unit area exerted on a surface by the weight of air above that surface in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. On a given plane, low-pressure areas have less atmospheric mass above their location, whereas high-pressure areas have more atmospheric mass above their location. Likewise, as elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation. On average, a column of air one square centimeter in cross-section, measured from sea level to the top of the atmosphere, has a mass of about 1.03 kg and weight of about 10.1 N (2.28 lb f ) (A column one square inch in cross-section would have a weight of about 14.7 lbs, or about 65.4 N). |
| 2012 |
88400 characters 11 sections 19 paragraphs 13 images 298 internal links 26 external links |
1. Standard atmospheric pressure 3. Altitude atmospheric pressure variation 4. Local atmospheric pressure variation 5. Atmospheric pressure records |
pressure 0.526 kpa 0.286 atmospheric 0.207 sea 0.205 standard 0.201 level 0.166 inhg 0.161 101 0.151 hectopascals 0.150 psi 0.130 barometers 0.128 qnh 0.128 weather 0.119 air 0.118 qfe 0.107 |
Atmospheric pressure is the force per unit area exerted on a surface by the weight of air above that surface in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the mass of air above the measurement point. Low-pressure areas have less atmospheric mass above their location, whereas high-pressure areas have more atmospheric mass above their location. Likewise, as elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation. On average, a column of air one square centimeter in cross-section, measured from sea level to the top of the atmosphere, has a mass of about 1.03 kg and weight of about 10.1 N (2.28 lb f ) (A column one square inch in cross-section would have a weight of about 14.7 lbs, or about 65.4 N). This is approximately the same as having a small car press down on you. [1] |
| 2011 |
50997 characters 11 sections 20 paragraphs 7 images 131 internal links 22 external links |
1. Standard atmospheric pressure 3. Altitude atmospheric pressure variation 4. Local atmospheric pressure variation 5. Atmospheric pressure records |
pressure 0.547 kpa 0.279 standard 0.199 sea 0.193 atmospheric 0.182 level 0.156 101 0.140 psi 0.138 barometers 0.136 qnh 0.136 inhg 0.136 weather 0.126 air 0.114 qfe 0.113 millibars 0.113 |
Atmospheric pressure is the force per unit area exerted into a surface by the weight of air above that surface in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low-pressure areas have less atmospheric mass above their location, whereas high-pressure areas have more atmospheric mass above their location. Likewise, as elevation increases, there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square centimeter in cross-section, measured from sea level to the top of the atmosphere, has a mass of about a kilogram and a weight of about 9.8 N (2.2 lbs force) (and a column one square inch in cross-section would weigh about 14 lbs force (63 N)). |
| 2010 |
45446 characters 11 sections 18 paragraphs 5 images 126 internal links 19 external links |
1. Standard atmospheric pressure 3. Altitude atmospheric pressure variation 4. Local atmospheric pressure variation 5. Atmospheric pressure records |
pressure 0.509 kpa 0.292 standard 0.208 sea 0.201 101 0.167 level 0.163 psi 0.144 atmospheric 0.143 barometers 0.142 qnh 0.142 inhg 0.142 mbar 0.135 weather 0.132 qfe 0.118 millibars 0.117 |
Atmospheric pressure is the force per unit area exerted against a surface by the weight of air above that surface in the Earth's atmosphere . In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh just over a stone (and a column one square centimetre in cross-section would weigh just over a kilogram). |
| 2009 |
69661 characters 12 sections 24 paragraphs 5 images 124 internal links 17 external links |
1. Standard atmospheric pressure 3. Altitude atmospheric pressure variation 4. Calculating variation with altitude 5. Local atmospheric pressure variation |
pressure 0.509 standard 0.249 kpa 0.219 sea 0.213 level 0.173 101 0.167 barometers 0.142 qnh 0.142 inhg 0.142 atmospheric 0.133 weather 0.132 air 0.130 qfe 0.118 millibars 0.117 iso 0.114 |
Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of air above that surface at any given point in the Earth's atmosphere . In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lbf (65 N ). The weight of a 1 m 2 (11 sq ft) column of air would be about 101 kN (10.3 t f ) . |
| 2008 |
63901 characters 13 sections 25 paragraphs 3 images 126 internal links 17 external links |
1. Standard atmospheric pressure 3. Altitude atmospheric pressure variation 4. Calculating variation with altitude 5. Local atmospheric pressure variation 6. Atmospheric pressure based on height of water |
pressure 0.498 standard 0.268 kpa 0.223 sea 0.217 level 0.176 weather 0.149 barometers 0.144 qnh 0.144 inhg 0.144 atmospheric 0.136 inches 0.131 101 0.127 air 0.122 qfe 0.120 millibars 0.120 |
Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of air above that surface at any given point in the Earth's atmosphere . In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lbf . The weight of a 1 m 2 (11 sq ft) column of air would be about 100 kilonewtons (equivalent to a mass of 10.2 tonnes at the surface). |
| 2007 |
62122 characters 11 sections 27 paragraphs 4 images 63 internal links 13 external links |
1. Standard atmospheric pressure 3. Altitude atmospheric pressure variation 4. Calculating variation with altitude 5. Local atmospheric pressure variation |
pressure 0.497 kpa 0.297 standard 0.268 sea 0.204 mbar 0.183 level 0.165 inches 0.153 inhg 0.144 atmospheric 0.135 weather 0.134 101 0.127 iso 0.116 equation 0.112 air 0.110 mercury 0.109 |
Atmospheric pressure is the pressure at any point in the Earth's atmosphere . In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air 1 square inch in cross section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lbf . A 1 m 2 (11 sq ft) column of air would weigh about 100 kilonewtons (equivalent to a mass of 10.2 tonnes at the surface). |
| 2006 |
47656 characters 10 sections 26 paragraphs 4 images 51 internal links 13 external links |
1. Standard atmospheric pressure 2. Calculating Standard Atmospheric Pressure 3. Mean sea level pressure (MSLP or QFF) 4. Altitude Atmospheric Pressure Variation 5. Local Atmospheric Pressure variation 6. Intuitive feeling for atmospheric pressure based on height of water |
pressure 0.521 kpa 0.253 standard 0.246 sea 0.236 level 0.191 mbar 0.187 inches 0.179 atmospheric 0.139 weather 0.137 displaystyle 0.132 air 0.125 p_ 0.123 iso 0.119 mercury 0.112 barometers 0.111 |
In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air 1 square inch in cross section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lb. A 1 m² column of air would weigh about 100 kilonewtons . |
| 2005 |
19592 characters 8 sections 23 paragraphs 2 images 57 internal links 3 external links |
1. Standard atmospheric pressure 2. Mean sea level pressure (MSLP or SLP) 3. Atmospheric pressure variation 4. Intuitive feeling for atmospheric pressure based on height of water |
pressure 0.561 sea 0.261 mbar 0.247 kpa 0.238 standard 0.203 level 0.199 atmospheric 0.163 air 0.159 weather 0.143 inhg 0.130 atm 0.117 inches 0.105 reports 0.105 transmitted 0.101 mercury 0.099 |
Atmospheric pressure is the pressure above any area in the Earth's atmosphere caused by the weight of air . Standard atmospheric pressure ( atm ) is discussed in the next section. |
| 2004 |
14966 characters 7 sections 17 paragraphs 0 images 34 internal links 3 external links |
1. Standard atmospheric pressure 2. Mean sea level pressure (MSLP or SLP) 3. Atmospheric pressure variation 4. Intuitive feeling for atmospheric pressure based on height of water |
pressure 0.648 atmospheric 0.312 air 0.209 height 0.166 standard 0.134 mercury 0.129 inches 0.124 sea 0.121 millibars 0.113 weather 0.113 fronts 0.102 atmosphere 0.097 atm 0.092 pa 0.090 weigh 0.090 |
Atmospheric pressure is the pressure caused by the weight of air above any area in the Earth's atmosphere . Standard atmospheric pressure ( atm ) is discussed in the next section. |
| 2003 |
6101 characters 2 sections 12 paragraphs 0 images 18 internal links 1 external links |
pressure 0.623 atmospheric 0.388 air 0.285 standard 0.242 fronts 0.155 pascals 0.152 atm 0.140 weigh 0.136 weather 0.128 column 0.119 sea 0.110 moment 0.105 classroom 0.103 cyclonic 0.097 level 0.089 |
Atmospheric pressure is the pressure caused by the weight of air above any area in the Earth's atmosphere . Standard atmospheric pressure ( atm ) is discussed in the next section. |
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| 2002 |
3047 characters 0 sections 6 paragraphs 0 images 12 internal links 0 external links |
pressure 0.578 atmospheric 0.395 air 0.370 standard 0.210 fronts 0.201 weigh 0.176 weather 0.166 column 0.155 cyclonic 0.126 approx 0.108 sea 0.095 exerted 0.095 low 0.093 areas 0.092 atm 0.091 |
Atmospheric pressure is the amount of force exerted over a surface area, caused by the weight of air above it. |