Relevant bibliographies by topics / Tropical tropopause (TTL)

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Tropical tropopause (TTL)'

Author: Grafiati
Published: 25 May 2024
Last updated: 19 July 2025

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Journal articles on the topic "Tropical tropopause (TTL)"

1

Gettelman, A., T. Birner, V. Eyring, et al. "The Tropical Tropopause Layer 1960–2100." Atmospheric Chemistry and Physics Discussions 8, no. 1 (2008): 1367–413. http://dx.doi.org/10.5194/acpd-8-1367-2008.

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Abstract. The representation of the Tropical Tropopause Layer in 13 different Chemistry Climate Models designed to represent the stratosphere is analyzed. Simulations for 1960–present and 1980–2100 are analyzed and compared to reanalysis model output. Results indicate that the models are able to reproduce the basic structure of the TTL. There is a large spread in cold point tropopause temperatures that may be linked to variation in TTL ozone values. The models are generally able to reproduce historical trends in tropopause pressure obtained from reanalysis products. Simulated historical trends
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Lei, Siliang, Xijuan Zhu, Yuxiang Ling, Shiwen Teng, and Bin Yao. "Tropical Tropopause Layer Cloud Properties from Spaceborne Active Observations." Remote Sensing 15, no. 5 (2023): 1223. http://dx.doi.org/10.3390/rs15051223.

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A significant part of clouds in the tropics appears over the tropopause due to intense convections and in situ condensation activity. These tropical tropopause layer (TTL) clouds not only play an important role in the radiation budget over the tropics, but also in water vapor and other chemical material transport from the troposphere to the stratosphere. This study quantifies and analyzes the properties of TTL clouds based on spaceborne active observations, which provide one of the most reliable sources of information on cloud vertical distributions. We use four years (2007–2010) of observatio
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Dzambo, Andrew M., Matthew H. Hitchman, and Kai-Wei Chang. "The Influence of Gravity Waves on Ice Saturation in the Tropical Tropopause Layer over Darwin, Australia." Atmosphere 10, no. 12 (2019): 778. http://dx.doi.org/10.3390/atmos10120778.

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Gravity waves (GWs) in the tropical tropopause layer (TTL) can help dehydrate the lower stratosphere through rapid cooling events, but observational studies of GWs in the TTL are limited. Using a long-term, high-resolution radiosonde temperature dataset, an atmospheric state classification technique, and wavelet analysis, we characterize temperature perturbations generated by GWs in the TTL over Darwin, Australia across eight atmospheric states. We find a peak in GW power just above the tropical tropopause and a climatological maximum during peak monsoon season. While accounting for a chronic
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Tegtmeier, Susann, James Anstey, Sean Davis, et al. "Temperature and tropopause characteristics from reanalyses data in the tropical tropopause layer." Atmospheric Chemistry and Physics 20, no. 2 (2020): 753–70. http://dx.doi.org/10.5194/acp-20-753-2020.

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Abstract. The tropical tropopause layer (TTL) is the transition region between the well-mixed convective troposphere and the radiatively controlled stratosphere with air masses showing chemical and dynamical properties of both regions. The representation of the TTL in meteorological reanalysis data sets is important for studying the complex interactions of circulation, convection, trace gases, clouds, and radiation. In this paper, we present the evaluation of climatological and long-term TTL temperature and tropopause characteristics in the reanalysis data sets ERA-Interim, ERA5, JRA-25, JRA-5
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Gettelman, A., T. Birner, V. Eyring, et al. "The Tropical Tropopause Layer 1960–2100." Atmospheric Chemistry and Physics 9, no. 5 (2009): 1621–37. http://dx.doi.org/10.5194/acp-9-1621-2009.

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Abstract. The representation of the Tropical Tropopause Layer (TTL) in 13 different Chemistry Climate Models (CCMs) designed to represent the stratosphere is analyzed. Simulations for 1960–2005 and 1980–2100 are analyzed. Simulations for 1960–2005 are compared to reanalysis model output. CCMs are able to reproduce the basic structure of the TTL. There is a large (10 K) spread in annual mean tropical cold point tropopause temperatures. CCMs are able to reproduce historical trends in tropopause pressure obtained from reanalysis products. Simulated historical trends in cold point tropopause tempe
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Schiller, C., J. U. Grooß, P. Konopka, F. Plöger, F. H. Silva dos Santos, and N. Spelten. "Hydration and dehydration at the tropical tropopause." Atmospheric Chemistry and Physics Discussions 9, no. 4 (2009): 17495–529. http://dx.doi.org/10.5194/acpd-9-17495-2009.

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Abstract. High-resolution water measurements from three tropical airborne missions in Northern Australia, Southern Brazil and West Africa in different seasons are analysed to study the transport and transformation of water in the tropical tropopause layer (TTL) and its impact on the stratosphere. The mean profiles are quite different according to the season and location of the campaigns, with lowest mixing ratios below 2 ppmv at the cold point tropopause during the Australian mission in November/December and high TTL mixing ratios during the African measurements in August. We present backward
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Schiller, C., J. U. Grooß, P. Konopka, F. Plöger, F. H. Silva dos Santos, and N. Spelten. "Hydration and dehydration at the tropical tropopause." Atmospheric Chemistry and Physics 9, no. 24 (2009): 9647–60. http://dx.doi.org/10.5194/acp-9-9647-2009.

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Abstract. High-resolution water measurements from three tropical airborne missions in Northern Australia, Southern Brazil and West Africa in different seasons are analysed to study the transport and transformation of water in the tropical tropopause layer (TTL) and its impact on the stratosphere. The mean profiles are quite different according to the season and location of the campaigns, with lowest mixing ratios below 2 ppmv at the cold point tropopause during the Australian mission in November/December and high TTL mixing ratios during the African measurements in August. We present backward
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8

Ryu, Jung-Hee, and Sukyoung Lee. "Effect of Tropical Waves on the Tropical Tropopause Transition Layer Upwelling." Journal of the Atmospheric Sciences 67, no. 10 (2010): 3130–48. http://dx.doi.org/10.1175/2010jas3434.1.

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Abstract An initial-value problem is employed with a GCM to investigate the role of the convectively driven Rossby and Kelvin waves for tropopause transition layer (TTL) upwelling in the tropics. The convective heating is mimicked with a prescribed heating field, and the Lagrangian upwelling is identified by examining the evolution of passive tracer fields whose initial distribution is identical to the initial heating field. This study shows that an overturning circulation, induced by the tropical Rossby waves, is capable of generating the TTL upwelling. Even when the heating is placed in the
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Lin, Pu, David Paynter, Yi Ming, and V. Ramaswamy. "Changes of the Tropical Tropopause Layer under Global Warming." Journal of Climate 30, no. 4 (2017): 1245–58. http://dx.doi.org/10.1175/jcli-d-16-0457.1.

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Abstract This paper investigates changes in the tropical tropopause layer (TTL) in response to carbon dioxide increase and surface warming separately in an atmospheric general circulation model, finding that both effects lead to a warmer tropical tropopause. Surface warming also results in an upward shift of the tropopause. A detailed heat budget analysis is performed to quantify the contributions from different radiative and dynamic processes to changes in the TTL temperature. When carbon dioxide increases with fixed surface temperature, a warmer TTL mainly results from the direct radiative e
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Froyd, K. D., D. M. Murphy, T. J. Sanford, et al. "Aerosol composition of the tropical upper troposphere." Atmospheric Chemistry and Physics Discussions 9, no. 2 (2009): 9399–456. http://dx.doi.org/10.5194/acpd-9-9399-2009.

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Abstract. Aerosol composition was measured by the NOAA single particle mass spectrometer (PALMS) aboard the NASA WB-57 high altitude aircraft platform during two Aura Validation Experiment (AVE) campaigns based in Costa Rica in 2004 and 2006. These studies yielded the most complete set of aerosol composition measurements to date throughout the tropical tropopause layer (TTL) and tropical lower stratosphere. We describe the aerosol properties of the tropical atmosphere and use composition tracers to examine particle sources, the role of recent convection, and cirrus-forming potential in the TTL
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Dissertations / Theses on the topic "Tropical tropopause (TTL)"

1

Waddicor, David Alan. "Aerosol in the tropical tropopause layer." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/aerosol-in-the-tropical-tropopause-layer(c68a4252-15dc-4a96-a890-0156719b3a9f).html.

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This thesis details the ACTIVE campaign in the tropics of northern Australia during 2005-2006 (based in Darwin). The focus of the campaign was to find the influence of tropical convection on the aerosol and chemical content of the Tropical Tropopause Layer [TTL] and the cirrus cloud cover in the area, which is important for the global energy budget. This study details the background climatology of the Darwin region with statistical categorisation of the trace gases and particles. The TTL had regions of extremely high aerosol number concentration, much higher than that of the PBL. The 10 to 100
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Newton, Richard. "Vertical profiling in the west Pacific warm pool." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/vertical-profiling-in-the-west-pacific-warm-pool(8c89d0ef-dc88-44d6-ad49-81cc34d5e662).html.

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This thesis consists of three distinct parts of CAST, CONTRAST and ATTREX, which were aircraft and field campaigns in the West Pacific in January-March 2014. The first section comprises of ozonesonde measurements from Manus Island, Papua New Guinea. A contamination issue affected the first 14 ozonesondes, and so particular care was required to characterize the background current, and as a result, a 'hybrid' background current correction was developed, which combines a constant correction with a pressure dependent correction. Collocated measurements with the CONTRAST aircraft - the NCAR Gulfste
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Plöger, Felix [Verfasser]. "Impact of different vertical transport representations on simulating processes in the tropical tropopause layer (TTL) / Felix Plöger." Wuppertal : Universitätsbibliothek Wuppertal, 2011. http://d-nb.info/1012468402/34.

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Podglajen, Aurélien. "Ondes et turbulence à la tropopause tropicale et impacts sur les cirrus." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEE013/document.

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Cette thèse s’intéresse aux ondes de gravité et à la turbulence dans la région de la tropopause tropicale (TTL pour tropical tropopause layer, entre 14 et 18 km d’altitude), et à leurs impacts sur les cirrus.Dans un premier temps, les fluctuations de température et de vent vertical induites dans la TTL par les ondes de gravité sont quantifiées et caractérisées à partir de mesures provenant de vols de ballons stratosphériques longue durée. Les perturbations observées sont comparées aux champs de fluctuations résolues par différents modèles atmosphériques globaux. À la lumière des observations,
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Podglajen, Aurélien. "Ondes et turbulence à la tropopause tropicale et impacts sur les cirrus." Electronic Thesis or Diss., Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEE013.

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Cette thèse s’intéresse aux ondes de gravité et à la turbulence dans la région de la tropopause tropicale (TTL pour tropical tropopause layer, entre 14 et 18 km d’altitude), et à leurs impacts sur les cirrus.Dans un premier temps, les fluctuations de température et de vent vertical induites dans la TTL par les ondes de gravité sont quantifiées et caractérisées à partir de mesures provenant de vols de ballons stratosphériques longue durée. Les perturbations observées sont comparées aux champs de fluctuations résolues par différents modèles atmosphériques globaux. À la lumière des observations,
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6

Corcos, Milena. "Processes affecting cirrus clouds life cycle at the tropical tropopause layer : contributions from the Stratéole-2 campaigns." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS119.

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Cette thèse s'intéresse à l'observation des ondes de gravité dans la tropopause tropicale (TTL pour tropical tropopause layer) par ballons pressurisés, et à leur impact sur les cirrus. Dans un premier temps, l'activité des ondes de gravité est quantifiée grâce aux observations in-situ des ballons pressurisés des deux premières campagnes de Stratéole-2. Le lien entre la convection profonde tropicale et l'activité des ondes est démontré à l'échelle synoptique par la diminution de l'amplitude des ondes avec la distance aux cellules convectives. La variabilité géographique de l'activité des ondes
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Wang, Tao. "Analysis of the Tropical Tropopause Layer Cirrus in CALIPSO and MLS Data - A Water Perspective." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9273.

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Two mechanisms appear to be primarily responsible for the formation of cirrus clouds in Tropical Tropopause Layer (TTL): detrainment from deep convective anvils and in situ initiation. Here we propose to identify TTL cirrus clouds by analyzing water content measurements from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) and Aura Microwave Limb Sounder (MLS). Using ice water content (IWC) and water vapor (H2O) abundances we identify TTL cirrus clouds that contain too much ice to have been formed in situ — and therefore must be of convective origin. We use t
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