Strong perturbations of the Arctic stratosphere during the winter 2002/2003 by planetary waves led to enhanced stretching and folding of the vortex. On two occasions the vortex in the lower stratosphere split into two secondary vortices that re-merged after some days. As a result of these strong disturbances the role of transport in and out of the vortex was stronger than usual. An advection and mixing simulation with the Chemical Lagrangian Model of the Stratosphere (CLaMS) utilising a suite of inert tracers tagging the original position of the air masses has been carried out. The results show a variety of synoptic and small scale features in the vicinity of the vortex boundary, especially long filaments peeling off the vortex edge and being slowly mixed into the mid latitude environment. The vortex folding events, followed by re-merging of different parts of the vortex led to strong filamentation of the vortex interior. During January, February, and March 2003 flights of the Russian high-altitude aircraft Geophysica were performed in order to probe the vortex. filaments and in one case the merging zone between the secondary vortices. Comparisons between CLaMS results and observations obtained from the Geophysica flights show in general good agreement. Several areas affected by both transport and strong mixing could be identified, allowing explanation of many of the structures observed during the flights. Furthermore, the CLaMS simulations allow for a quantification of the air mass exchange between mid latitudes and the vortex interior. The simulation suggests that after the formation of the vortex was completed, its interior remaind relativel undisturbed. Only during the two re-merging events were substantial amounts of extra-vortex air transported into the polar vortex. When in March the vortex starts weakening additional influence from lower latitudes becomes apparent in the model results.
机构:
NorthWest Res Associates, Socorro, NM 87801 USA
New Mexico Inst Min & Technol, Socorro, NM 87801 USANorthWest Res Associates, Socorro, NM 87801 USA
Manney, Gloria L.
Millan, Luis F.
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
Millan, Luis F.
Santee, Michelle L.
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
Santee, Michelle L.
Wargan, Krzysztof
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NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
Sci Syst & Applicat Inc, Lanham, MD USANorthWest Res Associates, Socorro, NM 87801 USA
Wargan, Krzysztof
Lambert, Alyn
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
Lambert, Alyn
Neu, Jessica L.
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
Neu, Jessica L.
Werner, Frank
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
Werner, Frank
Lawrence, Zachary D.
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Univ Colorado, Cooperat Inst Res Environm Sci CIRES, Boulder, CO 80309 USA
Univ Colorado, NOAA, Phys Sci Lab PSL, Boulder, CO 80309 USA
NorthWest Res Associates, Boulder, CO USANorthWest Res Associates, Socorro, NM 87801 USA
Lawrence, Zachary D.
Schwartz, Michael J.
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
Schwartz, Michael J.
Livesey, Nathaniel J.
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
Livesey, Nathaniel J.
Read, William G.
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CALTECH, Jet Prop Lab, Pasadena, CA USANorthWest Res Associates, Socorro, NM 87801 USA
机构:
Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China
City Univ Hong Kong, Guy Carpenter Asia Pacific Climate Impact Ctr, Ctr Ocean Res Hong Kong & Macau CORE, Sch Energy & Environm, Hong Kong, Peoples R ChinaFudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Zhang, Ruhua
Zhou, Wen
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Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China
City Univ Hong Kong, Guy Carpenter Asia Pacific Climate Impact Ctr, Ctr Ocean Res Hong Kong & Macau CORE, Sch Energy & Environm, Hong Kong, Peoples R ChinaFudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Zhou, Wen
Tian, Wenshou
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Lanzhou Univ, Coll Atmospher Sci, Key Lab Semi Arid Climate Change, Minist Educ, Lanzhou, Peoples R ChinaFudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Tian, Wenshou
Zhang, Yue
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Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China
City Univ Hong Kong, Guy Carpenter Asia Pacific Climate Impact Ctr, Ctr Ocean Res Hong Kong & Macau CORE, Sch Energy & Environm, Hong Kong, Peoples R ChinaFudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Zhang, Yue
Liu, Zhenchen
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Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China
City Univ Hong Kong, Guy Carpenter Asia Pacific Climate Impact Ctr, Ctr Ocean Res Hong Kong & Macau CORE, Sch Energy & Environm, Hong Kong, Peoples R ChinaFudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
Liu, Zhenchen
Cheung, Paxson K. Y.
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City Univ Hong Kong, Guy Carpenter Asia Pacific Climate Impact Ctr, Ctr Ocean Res Hong Kong & Macau CORE, Sch Energy & Environm, Hong Kong, Peoples R ChinaFudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China