Examining Mechanisms of Variability within the Pacific Storm Track: Upstream Seeding and Jet-Core Strength
This paper examines how variations in two mechanisms, upstream seeding and jet-core strength, relate to storminess within the cold season (October–April) Pacific storm track. It is found that about 17% of observed storminess covaries with the strength of the upstream wave source, and the relationshi...
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| Veröffentlicht in: | Journal of climate 2013-07, Vol.26 (14), p.5242-5259 |
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| creator | Penny, Sandra M. Battisti, David S. Roe, Gerard H. |
| description | This paper examines how variations in two mechanisms, upstream seeding and jet-core strength, relate to storminess within the cold season (October–April) Pacific storm track. It is found that about 17% of observed storminess covaries with the strength of the upstream wave source, and the relationship is robust throughout the cold season and for both the Pacific and Atlantic basins. Further analyses of the intraseasonal variability in the strength and structure of the wintertime [December–February (DJF)] Pacific jet stream draw upon both Eulerian-variance and feature-tracking statistics to diagnose why winter months with a strong-core jet stream have weaker storminess than those with a weak-core jet stream. Contrary to expectations, it is shown that the basic spatial patterns actually conform to a simple linear picture: regions with a weaker jet have weaker storminess. The overall decrease in storminess is most strongly linked to the weaker amplitude of individual storms in strong-core months. Previously proposed mechanisms are evaluated in the context of these new results. Last, this analysis provides further evidence that the midwinter suppression in storminess over the North Pacific Ocean is primarily due to a notable lack of storminess upstream of the Pacific storm track in the heart of winter. |
| doi_str_mv | 10.1175/jcli-d-12-00017.1 |
| format | Article |
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It is found that about 17% of observed storminess covaries with the strength of the upstream wave source, and the relationship is robust throughout the cold season and for both the Pacific and Atlantic basins. Further analyses of the intraseasonal variability in the strength and structure of the wintertime [December–February (DJF)] Pacific jet stream draw upon both Eulerian-variance and feature-tracking statistics to diagnose why winter months with a strong-core jet stream have weaker storminess than those with a weak-core jet stream. Contrary to expectations, it is shown that the basic spatial patterns actually conform to a simple linear picture: regions with a weaker jet have weaker storminess. The overall decrease in storminess is most strongly linked to the weaker amplitude of individual storms in strong-core months. Previously proposed mechanisms are evaluated in the context of these new results. Last, this analysis provides further evidence that the midwinter suppression in storminess over the North Pacific Ocean is primarily due to a notable lack of storminess upstream of the Pacific storm track in the heart of winter.</description><identifier>ISSN: 0894-8755</identifier><identifier>EISSN: 1520-0442</identifier><identifier>DOI: 10.1175/jcli-d-12-00017.1</identifier><language>eng</language><publisher>Boston, MA: American Meteorological Society</publisher><subject>Cold ; Cold season ; Cold storage ; Correlations ; Datasets ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Heart ; Inverse relationships ; Jet stream ; Jet streams ; Jet streams (meteorology) ; Marine ; Meteorology ; Nucleation ; Rivers ; Seasonal variations ; Seasons ; Seeding ; Statistical analysis ; Statistical methods ; Statistical variance ; Storm seasons ; Storm tracks ; Storms ; Storms, hurricanes, tornadoes, thunderstorms ; Strength ; Studies ; Temperate regions ; Tracking ; Upstream ; Variability ; Winter</subject><ispartof>Journal of climate, 2013-07, Vol.26 (14), p.5242-5259</ispartof><rights>2013 American Meteorological Society</rights><rights>2015 INIST-CNRS</rights><rights>Copyright American Meteorological Society Jul 15, 2013</rights><rights>Copyright American Meteorological Society 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c528t-5a6aa14a7615c2fe3a87bf909c7299b97ae6c1c8533e6afd15d5c9514553d2a53</citedby><cites>FETCH-LOGICAL-c528t-5a6aa14a7615c2fe3a87bf909c7299b97ae6c1c8533e6afd15d5c9514553d2a53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/26192694$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/26192694$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,3681,27924,27925,58017,58250</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27519319$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Penny, Sandra M.</creatorcontrib><creatorcontrib>Battisti, David S.</creatorcontrib><creatorcontrib>Roe, Gerard H.</creatorcontrib><title>Examining Mechanisms of Variability within the Pacific Storm Track: Upstream Seeding and Jet-Core Strength</title><title>Journal of climate</title><description>This paper examines how variations in two mechanisms, upstream seeding and jet-core strength, relate to storminess within the cold season (October–April) Pacific storm track. It is found that about 17% of observed storminess covaries with the strength of the upstream wave source, and the relationship is robust throughout the cold season and for both the Pacific and Atlantic basins. Further analyses of the intraseasonal variability in the strength and structure of the wintertime [December–February (DJF)] Pacific jet stream draw upon both Eulerian-variance and feature-tracking statistics to diagnose why winter months with a strong-core jet stream have weaker storminess than those with a weak-core jet stream. Contrary to expectations, it is shown that the basic spatial patterns actually conform to a simple linear picture: regions with a weaker jet have weaker storminess. The overall decrease in storminess is most strongly linked to the weaker amplitude of individual storms in strong-core months. Previously proposed mechanisms are evaluated in the context of these new results. 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Mechanisms of Variability within the Pacific Storm Track</title><author>Penny, Sandra M. ; Battisti, David S. ; Roe, Gerard H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c528t-5a6aa14a7615c2fe3a87bf909c7299b97ae6c1c8533e6afd15d5c9514553d2a53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Cold</topic><topic>Cold season</topic><topic>Cold storage</topic><topic>Correlations</topic><topic>Datasets</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Heart</topic><topic>Inverse relationships</topic><topic>Jet stream</topic><topic>Jet streams</topic><topic>Jet streams (meteorology)</topic><topic>Marine</topic><topic>Meteorology</topic><topic>Nucleation</topic><topic>Rivers</topic><topic>Seasonal variations</topic><topic>Seasons</topic><topic>Seeding</topic><topic>Statistical 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S.</au><au>Roe, Gerard H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Examining Mechanisms of Variability within the Pacific Storm Track: Upstream Seeding and Jet-Core Strength</atitle><jtitle>Journal of climate</jtitle><date>2013-07-01</date><risdate>2013</risdate><volume>26</volume><issue>14</issue><spage>5242</spage><epage>5259</epage><pages>5242-5259</pages><issn>0894-8755</issn><eissn>1520-0442</eissn><abstract>This paper examines how variations in two mechanisms, upstream seeding and jet-core strength, relate to storminess within the cold season (October–April) Pacific storm track. It is found that about 17% of observed storminess covaries with the strength of the upstream wave source, and the relationship is robust throughout the cold season and for both the Pacific and Atlantic basins. Further analyses of the intraseasonal variability in the strength and structure of the wintertime [December–February (DJF)] Pacific jet stream draw upon both Eulerian-variance and feature-tracking statistics to diagnose why winter months with a strong-core jet stream have weaker storminess than those with a weak-core jet stream. Contrary to expectations, it is shown that the basic spatial patterns actually conform to a simple linear picture: regions with a weaker jet have weaker storminess. The overall decrease in storminess is most strongly linked to the weaker amplitude of individual storms in strong-core months. Previously proposed mechanisms are evaluated in the context of these new results. Last, this analysis provides further evidence that the midwinter suppression in storminess over the North Pacific Ocean is primarily due to a notable lack of storminess upstream of the Pacific storm track in the heart of winter.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/jcli-d-12-00017.1</doi><tpages>18</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of climate, 2013-07, Vol.26 (14), p.5242-5259 |
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| source | American Meteorological Society; JSTOR Archive Collection A-Z Listing; EZB-FREE-00999 freely available EZB journals |
| subjects | Cold Cold season Cold storage Correlations Datasets Earth, ocean, space Exact sciences and technology External geophysics Heart Inverse relationships Jet stream Jet streams Jet streams (meteorology) Marine Meteorology Nucleation Rivers Seasonal variations Seasons Seeding Statistical analysis Statistical methods Statistical variance Storm seasons Storm tracks Storms Storms, hurricanes, tornadoes, thunderstorms Strength Studies Temperate regions Tracking Upstream Variability Winter |
| title | Examining Mechanisms of Variability within the Pacific Storm Track: Upstream Seeding and Jet-Core Strength |
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