The Global Distribution of Supersaturation in the Upper Troposphere from the Atmospheric Infrared Sounder
Satellite data from the Atmospheric Infrared Sounder (AIRS) is analyzed to examine regions of the upper troposphere that are supersaturated: where the relative humidity (RH) is greater than 100%. AIRS data compare well to other in situ and satellite observations of RH and provide daily global covera...
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| Veröffentlicht in: | Journal of climate 2006-12, Vol.19 (23), p.6089-6103 |
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| creator | Gettelman, Andrew Fetzer, Eric J. Eldering, Annmarie Irion, Fredrick W. |
| description | Satellite data from the Atmospheric Infrared Sounder (AIRS) is analyzed to examine regions of the upper troposphere that are supersaturated: where the relative humidity (RH) is greater than 100%. AIRS data compare well to other in situ and satellite observations of RH and provide daily global coverage up to 200 hPa, though satellite observations of supersaturation are highly uncertain. The climatology of supersaturation is analyzed statistically to understand where supersaturation occurs and how frequently. Supersaturation occurs in humid regions of the upper tropical tropopause near convection 10%–20% of the time at 200 hPa. Supersaturation is very frequent in the extratropical upper troposphere, occurring 20%–40% of the time, and over 50% of the time in storm track regions below the tropopause. The annual cycle of supersaturation is consistent for the ~2.5 yr of data analyzed. More supersaturation is seen in the Southern Hemisphere midlatitudes, which may be attributed to higher temperature variance. |
| doi_str_mv | 10.1175/jcli3955.1 |
| format | Article |
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AIRS data compare well to other in situ and satellite observations of RH and provide daily global coverage up to 200 hPa, though satellite observations of supersaturation are highly uncertain. The climatology of supersaturation is analyzed statistically to understand where supersaturation occurs and how frequently. Supersaturation occurs in humid regions of the upper tropical tropopause near convection 10%–20% of the time at 200 hPa. Supersaturation is very frequent in the extratropical upper troposphere, occurring 20%–40% of the time, and over 50% of the time in storm track regions below the tropopause. The annual cycle of supersaturation is consistent for the ~2.5 yr of data analyzed. More supersaturation is seen in the Southern Hemisphere midlatitudes, which may be attributed to higher temperature variance.</description><identifier>ISSN: 0894-8755</identifier><identifier>EISSN: 1520-0442</identifier><identifier>DOI: 10.1175/jcli3955.1</identifier><language>eng</language><publisher>Boston, MA: American Meteorological Society</publisher><subject>Aerosols ; Aircraft ; Annual variations ; Atmosphere ; Atmospheric Infrared Sounder ; Climate ; Climatology ; Clouds ; Convection ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Frequencies ; General circulation models ; High temperature ; Humidity ; Infrared analysis ; Meteorology ; Ozone ; Relative humidity ; Remote sensing ; Satellite data ; Satellite observation ; Satellites ; Southern Hemisphere ; Storm tracks ; Storms ; Stratosphere ; Supersaturation ; Temperate regions ; Temperature ; Tropical regions ; Tropical tropopause ; Tropopause ; Troposphere ; Upper troposphere ; Water in the atmosphere (humidity, clouds, evaporation, precipitation) ; Water vapor</subject><ispartof>Journal of climate, 2006-12, Vol.19 (23), p.6089-6103</ispartof><rights>2006 American Meteorological Society</rights><rights>2007 INIST-CNRS</rights><rights>Copyright American Meteorological Society Dec 1, 2006</rights><rights>Copyright American Meteorological Society 2006</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c471t-fe9ca05fc5730951d261daa1af4eebb052242737954f4b6296eb220df47f0cb93</citedby><cites>FETCH-LOGICAL-c471t-fe9ca05fc5730951d261daa1af4eebb052242737954f4b6296eb220df47f0cb93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/26259347$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/26259347$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,3679,27923,27924,58016,58249</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18369604$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Gettelman, Andrew</creatorcontrib><creatorcontrib>Fetzer, Eric J.</creatorcontrib><creatorcontrib>Eldering, Annmarie</creatorcontrib><creatorcontrib>Irion, Fredrick W.</creatorcontrib><title>The Global Distribution of Supersaturation in the Upper Troposphere from the Atmospheric Infrared Sounder</title><title>Journal of climate</title><description>Satellite data from the Atmospheric Infrared Sounder (AIRS) is analyzed to examine regions of the upper troposphere that are supersaturated: where the relative humidity (RH) is greater than 100%. AIRS data compare well to other in situ and satellite observations of RH and provide daily global coverage up to 200 hPa, though satellite observations of supersaturation are highly uncertain. The climatology of supersaturation is analyzed statistically to understand where supersaturation occurs and how frequently. Supersaturation occurs in humid regions of the upper tropical tropopause near convection 10%–20% of the time at 200 hPa. Supersaturation is very frequent in the extratropical upper troposphere, occurring 20%–40% of the time, and over 50% of the time in storm track regions below the tropopause. The annual cycle of supersaturation is consistent for the ~2.5 yr of data analyzed. More supersaturation is seen in the Southern Hemisphere midlatitudes, which may be attributed to higher temperature variance.</description><subject>Aerosols</subject><subject>Aircraft</subject><subject>Annual variations</subject><subject>Atmosphere</subject><subject>Atmospheric Infrared Sounder</subject><subject>Climate</subject><subject>Climatology</subject><subject>Clouds</subject><subject>Convection</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Frequencies</subject><subject>General circulation models</subject><subject>High temperature</subject><subject>Humidity</subject><subject>Infrared analysis</subject><subject>Meteorology</subject><subject>Ozone</subject><subject>Relative humidity</subject><subject>Remote sensing</subject><subject>Satellite data</subject><subject>Satellite observation</subject><subject>Satellites</subject><subject>Southern Hemisphere</subject><subject>Storm tracks</subject><subject>Storms</subject><subject>Stratosphere</subject><subject>Supersaturation</subject><subject>Temperate regions</subject><subject>Temperature</subject><subject>Tropical regions</subject><subject>Tropical tropopause</subject><subject>Tropopause</subject><subject>Troposphere</subject><subject>Upper troposphere</subject><subject>Water in the atmosphere (humidity, clouds, evaporation, precipitation)</subject><subject>Water 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Editorial</collection><jtitle>Journal of climate</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gettelman, Andrew</au><au>Fetzer, Eric J.</au><au>Eldering, Annmarie</au><au>Irion, Fredrick W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Global Distribution of Supersaturation in the Upper Troposphere from the Atmospheric Infrared Sounder</atitle><jtitle>Journal of climate</jtitle><date>2006-12-01</date><risdate>2006</risdate><volume>19</volume><issue>23</issue><spage>6089</spage><epage>6103</epage><pages>6089-6103</pages><issn>0894-8755</issn><eissn>1520-0442</eissn><abstract>Satellite data from the Atmospheric Infrared Sounder (AIRS) is analyzed to examine regions of the upper troposphere that are supersaturated: where the relative humidity (RH) is greater than 100%. AIRS data compare well to other in situ and satellite observations of RH and provide daily global coverage up to 200 hPa, though satellite observations of supersaturation are highly uncertain. The climatology of supersaturation is analyzed statistically to understand where supersaturation occurs and how frequently. Supersaturation occurs in humid regions of the upper tropical tropopause near convection 10%–20% of the time at 200 hPa. Supersaturation is very frequent in the extratropical upper troposphere, occurring 20%–40% of the time, and over 50% of the time in storm track regions below the tropopause. The annual cycle of supersaturation is consistent for the ~2.5 yr of data analyzed. More supersaturation is seen in the Southern Hemisphere midlatitudes, which may be attributed to higher temperature variance.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/jcli3955.1</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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| source | American Meteorological Society; JSTOR Archive Collection A-Z Listing; EZB-FREE-00999 freely available EZB journals |
| subjects | Aerosols Aircraft Annual variations Atmosphere Atmospheric Infrared Sounder Climate Climatology Clouds Convection Earth, ocean, space Exact sciences and technology External geophysics Frequencies General circulation models High temperature Humidity Infrared analysis Meteorology Ozone Relative humidity Remote sensing Satellite data Satellite observation Satellites Southern Hemisphere Storm tracks Storms Stratosphere Supersaturation Temperate regions Temperature Tropical regions Tropical tropopause Tropopause Troposphere Upper troposphere Water in the atmosphere (humidity, clouds, evaporation, precipitation) Water vapor |
| title | The Global Distribution of Supersaturation in the Upper Troposphere from the Atmospheric Infrared Sounder |
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