Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5194/acp-16-12273-2016 http://hdl.handle.net/11449/173547 |
Resumo: | High-resolution in situ balloon measurements of water vapour, aerosol, methane and temperature in the upper tropical tropopause layer (TTL) and lower stratosphere are used to evaluate the processes affecting the stratospheric water budget: horizontal transport (in-mixing) and hydration by cross-Tropopause overshooting updrafts. The obtained in situ evidence of these phenomena are analysed using satellite observations by Aura MLS (Microwave Limb Sounder) and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) together with trajectory and transport modelling performed using CLaMS (Chemical Lagrangian Model of the Stratosphere) and HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model.<br><br> Balloon soundings were conducted during March 2012 in Bauru, Brazil (22.3°ĝ€S) in the frame of the TRO-Pico campaign for studying the impact of convective overshooting on the stratospheric water budget. The balloon payloads included two stratospheric hygrometers: FLASH-B (Fluorescence Lyman-Alpha Stratospheric Hygrometer for Balloon) and Pico-SDLA instrument as well as COBALD (Compact Optical Backscatter Aerosol Detector) sondes, complemented by Vaisala RS92 radiosondes. Water vapour vertical profiles obtained independently by the two stratospheric hygrometers are in excellent agreement, ensuring credibility of the vertical structures observed.<br><br> A signature of in-mixing is inferred from a series of vertical profiles, showing coincident enhancements in water vapour (of up to 0.5ĝ€ppmv) and aerosol at the 425ĝ€K (18.5ĝ€km) level. Trajectory analysis unambiguously links these features to intrusions from the Southern Hemisphere extratropical stratosphere, containing more water and aerosol, as demonstrated by MLS and CALIPSO global observations. The in-mixing is successfully reproduced by CLaMS simulations, showing a relatively moist filament extending to 20°ĝ€S. A signature of local cross-Tropopause transport of water is observed in a particular sounding, performed on a convective day and revealing water vapour enhancements of up to 0.6ĝ€ppmv as high as the 404ĝ€K (17.8ĝ€km) level. These are shown to originate from convective overshoots upwind detected by an S-band weather radar operating locally in Bauru.<br><br> The accurate in situ observations uncover two independent moisture pathways into the tropical lower stratosphere, which are hardly detectable by space-borne sounders. We argue that the moistening by horizontal transport is limited by the weak meridional gradients of water, whereas the fast convective cross-Tropopause transport, largely missed by global models, can have a substantial effect, at least at a regional scale. |
id |
UNSP_ef7283391d17705453c4d70fc96871c2 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/173547 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observationsHigh-resolution in situ balloon measurements of water vapour, aerosol, methane and temperature in the upper tropical tropopause layer (TTL) and lower stratosphere are used to evaluate the processes affecting the stratospheric water budget: horizontal transport (in-mixing) and hydration by cross-Tropopause overshooting updrafts. The obtained in situ evidence of these phenomena are analysed using satellite observations by Aura MLS (Microwave Limb Sounder) and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) together with trajectory and transport modelling performed using CLaMS (Chemical Lagrangian Model of the Stratosphere) and HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model.<br><br> Balloon soundings were conducted during March 2012 in Bauru, Brazil (22.3°ĝ€S) in the frame of the TRO-Pico campaign for studying the impact of convective overshooting on the stratospheric water budget. The balloon payloads included two stratospheric hygrometers: FLASH-B (Fluorescence Lyman-Alpha Stratospheric Hygrometer for Balloon) and Pico-SDLA instrument as well as COBALD (Compact Optical Backscatter Aerosol Detector) sondes, complemented by Vaisala RS92 radiosondes. Water vapour vertical profiles obtained independently by the two stratospheric hygrometers are in excellent agreement, ensuring credibility of the vertical structures observed.<br><br> A signature of in-mixing is inferred from a series of vertical profiles, showing coincident enhancements in water vapour (of up to 0.5ĝ€ppmv) and aerosol at the 425ĝ€K (18.5ĝ€km) level. Trajectory analysis unambiguously links these features to intrusions from the Southern Hemisphere extratropical stratosphere, containing more water and aerosol, as demonstrated by MLS and CALIPSO global observations. The in-mixing is successfully reproduced by CLaMS simulations, showing a relatively moist filament extending to 20°ĝ€S. A signature of local cross-Tropopause transport of water is observed in a particular sounding, performed on a convective day and revealing water vapour enhancements of up to 0.6ĝ€ppmv as high as the 404ĝ€K (17.8ĝ€km) level. These are shown to originate from convective overshoots upwind detected by an S-band weather radar operating locally in Bauru.<br><br> The accurate in situ observations uncover two independent moisture pathways into the tropical lower stratosphere, which are hardly detectable by space-borne sounders. We argue that the moistening by horizontal transport is limited by the weak meridional gradients of water, whereas the fast convective cross-Tropopause transport, largely missed by global models, can have a substantial effect, at least at a regional scale.LATMOS CNRS Université de Versailles St QuentinGSMA Université de Reims Champagne Ardenne and CNRSInstituto de Pesquisas Meteorológicas (IPMet) UNESPForschungszentrum JülichDivision Technique de l'Insu CNRSScience Systems and Applications IncNASA Langley Research CenterETH Zurich Institute for Atmospheric and Climate ScienceSt. Petersburg State UniversityNational Institute of Standards and TechnologyInstituto de Pesquisas Meteorológicas (IPMet) UNESPUniversité de Versailles St QuentinUniversité de Reims Champagne Ardenne and CNRSUniversidade Estadual Paulista (Unesp)Forschungszentrum JülichCNRSScience Systems and Applications IncNASA Langley Research CenterInstitute for Atmospheric and Climate ScienceSt. Petersburg State UniversityNational Institute of Standards and TechnologyKhaykin, Sergey M.Pommereau, Jean-PierreRiviere, Emmanuel D.Held, Gerhard [UNESP]Ploeger, FelixGhysels, MelanieAmarouche, NadirVernier, Jean-PaulWienhold, Frank G.Ionov, Dmitry2018-12-11T17:06:12Z2018-12-11T17:06:12Z2016-09-29info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article12273-12286application/pdfhttp://dx.doi.org/10.5194/acp-16-12273-2016Atmospheric Chemistry and Physics, v. 16, n. 18, p. 12273-12286, 2016.1680-73241680-7316http://hdl.handle.net/11449/17354710.5194/acp-16-12273-20162-s2.0-849893290682-s2.0-84989329068.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAtmospheric Chemistry and Physics3,0323,032info:eu-repo/semantics/openAccess2023-12-17T06:19:24Zoai:repositorio.unesp.br:11449/173547Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:33:26.535163Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations |
title |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations |
spellingShingle |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations Khaykin, Sergey M. |
title_short |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations |
title_full |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations |
title_fullStr |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations |
title_full_unstemmed |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations |
title_sort |
Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations |
author |
Khaykin, Sergey M. |
author_facet |
Khaykin, Sergey M. Pommereau, Jean-Pierre Riviere, Emmanuel D. Held, Gerhard [UNESP] Ploeger, Felix Ghysels, Melanie Amarouche, Nadir Vernier, Jean-Paul Wienhold, Frank G. Ionov, Dmitry |
author_role |
author |
author2 |
Pommereau, Jean-Pierre Riviere, Emmanuel D. Held, Gerhard [UNESP] Ploeger, Felix Ghysels, Melanie Amarouche, Nadir Vernier, Jean-Paul Wienhold, Frank G. Ionov, Dmitry |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Université de Versailles St Quentin Université de Reims Champagne Ardenne and CNRS Universidade Estadual Paulista (Unesp) Forschungszentrum Jülich CNRS Science Systems and Applications Inc NASA Langley Research Center Institute for Atmospheric and Climate Science St. Petersburg State University National Institute of Standards and Technology |
dc.contributor.author.fl_str_mv |
Khaykin, Sergey M. Pommereau, Jean-Pierre Riviere, Emmanuel D. Held, Gerhard [UNESP] Ploeger, Felix Ghysels, Melanie Amarouche, Nadir Vernier, Jean-Paul Wienhold, Frank G. Ionov, Dmitry |
description |
High-resolution in situ balloon measurements of water vapour, aerosol, methane and temperature in the upper tropical tropopause layer (TTL) and lower stratosphere are used to evaluate the processes affecting the stratospheric water budget: horizontal transport (in-mixing) and hydration by cross-Tropopause overshooting updrafts. The obtained in situ evidence of these phenomena are analysed using satellite observations by Aura MLS (Microwave Limb Sounder) and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) together with trajectory and transport modelling performed using CLaMS (Chemical Lagrangian Model of the Stratosphere) and HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model.<br><br> Balloon soundings were conducted during March 2012 in Bauru, Brazil (22.3°ĝ€S) in the frame of the TRO-Pico campaign for studying the impact of convective overshooting on the stratospheric water budget. The balloon payloads included two stratospheric hygrometers: FLASH-B (Fluorescence Lyman-Alpha Stratospheric Hygrometer for Balloon) and Pico-SDLA instrument as well as COBALD (Compact Optical Backscatter Aerosol Detector) sondes, complemented by Vaisala RS92 radiosondes. Water vapour vertical profiles obtained independently by the two stratospheric hygrometers are in excellent agreement, ensuring credibility of the vertical structures observed.<br><br> A signature of in-mixing is inferred from a series of vertical profiles, showing coincident enhancements in water vapour (of up to 0.5ĝ€ppmv) and aerosol at the 425ĝ€K (18.5ĝ€km) level. Trajectory analysis unambiguously links these features to intrusions from the Southern Hemisphere extratropical stratosphere, containing more water and aerosol, as demonstrated by MLS and CALIPSO global observations. The in-mixing is successfully reproduced by CLaMS simulations, showing a relatively moist filament extending to 20°ĝ€S. A signature of local cross-Tropopause transport of water is observed in a particular sounding, performed on a convective day and revealing water vapour enhancements of up to 0.6ĝ€ppmv as high as the 404ĝ€K (17.8ĝ€km) level. These are shown to originate from convective overshoots upwind detected by an S-band weather radar operating locally in Bauru.<br><br> The accurate in situ observations uncover two independent moisture pathways into the tropical lower stratosphere, which are hardly detectable by space-borne sounders. We argue that the moistening by horizontal transport is limited by the weak meridional gradients of water, whereas the fast convective cross-Tropopause transport, largely missed by global models, can have a substantial effect, at least at a regional scale. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-09-29 2018-12-11T17:06:12Z 2018-12-11T17:06:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5194/acp-16-12273-2016 Atmospheric Chemistry and Physics, v. 16, n. 18, p. 12273-12286, 2016. 1680-7324 1680-7316 http://hdl.handle.net/11449/173547 10.5194/acp-16-12273-2016 2-s2.0-84989329068 2-s2.0-84989329068.pdf |
url |
http://dx.doi.org/10.5194/acp-16-12273-2016 http://hdl.handle.net/11449/173547 |
identifier_str_mv |
Atmospheric Chemistry and Physics, v. 16, n. 18, p. 12273-12286, 2016. 1680-7324 1680-7316 10.5194/acp-16-12273-2016 2-s2.0-84989329068 2-s2.0-84989329068.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Atmospheric Chemistry and Physics 3,032 3,032 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
12273-12286 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129220280320000 |