Relevant bibliographies by topics / Synoptic meteorology

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Synoptic meteorology'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "Synoptic meteorology"

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Pant, P. S. "Synoptic Meteorology in china." MAUSAM 42, no. 3 (February 28, 2022): 331–32. http://dx.doi.org/10.54302/mausam.v42i3.4961.

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SAITO, Naosuke. "Synoptic Meteorology and Weather Forecasting." Journal of Geography (Chigaku Zasshi) 96, no. 7 (1988): 415–21. http://dx.doi.org/10.5026/jgeography.96.7_415.

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Nielsen-Gammon, John W. "Midlatitude synoptic meteorology: Dynamics, analysis, and forecasting." Eos, Transactions American Geophysical Union 93, no. 43 (October 23, 2012): 430. http://dx.doi.org/10.1029/2012eo430010.

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Pope, R. J., N. H. Savage, M. P. Chipperfield, C. Ordóñez, and L. S. Neal. "The influence of synoptic weather regimes on UK air quality: regional model studies of tropospheric column NO<sub>2</sub>." Atmospheric Chemistry and Physics Discussions 15, no. 13 (July 8, 2015): 18577–607. http://dx.doi.org/10.5194/acpd-15-18577-2015.

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Abstract. Synoptic meteorology can have a significant influence on UK air quality. Cyclonic (anticyclonic) conditions lead to the dispersion (accumulation) of air pollutants away from (over) source regions. Meteorology also modifies atmospheric chemistry processes such as photolysis and wet deposition. Previous studies have shown a relationship between observed satellite tropospheric column NO2 and synoptic meteorology in different seasons. Here, we test whether the UK Met Office Air Quality in the Unified Model (AQUM) can reproduce these observations and then use the model to determine the controlling factors. We show that AQUM successfully captures the observed relationships, when sampled under the Lamb Weather Types, an objective classification of midday UK circulation patterns. By using a range of idealised NOx-like tracers with different e-folding lifetimes, we show that under different synoptic regimes the NO2 lifetime in AQUM is approximately 6 h in summer and 12 h in winter. The longer lifetime can explain why synoptic spatial column NO2 variations are more significant in winter compared to summer, due to less NO2 photochemical loss. We also show that cyclonic conditions have more seasonality in column NO2 than anticyclonic conditions as they result in more extreme spatial departures from the wintertime seasonal average. Within a season (summer or winter) under different synoptic regimes, a large proportion of the spatial pattern in the UK column NO2 field can be explained by the idealised model tracers, showing that transport is an important factor in governing the variability of UK air quality on seasonal synoptic timescales.
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Worthington, R. M. "Asymmetry of atmospheric microstructure over synoptic scales." Annales Geophysicae 19, no. 8 (August 31, 2001): 921–24. http://dx.doi.org/10.5194/angeo-19-921-2001.

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Abstract. Distortions are often seen in the angular distribution of echo-power from VHF wind-profiling radars, suggesting that thin stable layers, within the air flow, are distorted and tilted from horizontal. In vertical shear of the horizontal wind, the distribution of the layer tilt angles becomes skewed. A case study using six days of VHF radar data and synoptic charts above western Europe indicates that this asymmetry of atmospheric microstructure can exist throughout the troposphere and lower stratosphere, above and below the jet wind maximum, over horizontal scales of thousands of kilometres.Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; synoptic-scale meteorology; turbulence).
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Pope, R. J., N. H. Savage, M. P. Chipperfield, C. Ordóñez, and L. S. Neal. "The influence of synoptic weather regimes on UK air quality: regional model studies of tropospheric column NO<sub>2</sub>." Atmospheric Chemistry and Physics 15, no. 19 (October 8, 2015): 11201–15. http://dx.doi.org/10.5194/acp-15-11201-2015.

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Abstract. Synoptic meteorology can have a significant influence on UK air quality. Cyclonic conditions lead to the dispersion of air pollutants away from source regions, while anticyclonic conditions lead to their accumulation over source regions. Meteorology also modifies atmospheric chemistry processes such as photolysis and wet deposition. Previous studies have shown a relationship between observed satellite tropospheric column NO2 and synoptic meteorology in different seasons. Here, we test whether the UK Met Office Air Quality in the Unified Model (AQUM) can reproduce these observations and then use the model to explore the relative importance of various factors. We show that AQUM successfully captures the observed relationships when sampled under the Lamb weather types, an objective classification of midday UK circulation patterns. By using a range of idealized NOx-like tracers with different e-folding lifetimes, we show that under different synoptic regimes the NO2 lifetime in AQUM is approximately 6 h in summer and 12 h in winter. The longer lifetime can explain why synoptic spatial tropospheric column NO2 variations are more significant in winter compared to summer, due to less NO2 photochemical loss. We also show that cyclonic conditions have more seasonality in tropospheric column NO2 than anticyclonic conditions as they result in more extreme spatial departures from the wintertime seasonal average. Within a season (summer or winter) under different synoptic regimes, a large proportion of the spatial pattern in the UK tropospheric column NO2 field can be explained by the idealized model tracers, showing that transport is an important factor in governing the variability of UK air quality on seasonal synoptic timescales.
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Prieto, L., R. Garcia, J. Diaz, E. Hernandez, and T. del Teso. "NAO influence on extreme winter temperatures in Madrid (Spain)." Annales Geophysicae 20, no. 12 (December 31, 2002): 2077–85. http://dx.doi.org/10.5194/angeo-20-2077-2002.

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Abstract. Extremely cold days (ECDs), with minimum temperatures lower than -4.6°C, have been analysed for Madrid. This threshold corresponds to the 5th percentile of the period 1963–1999. Adopting a case analysis approach, five synoptic patterns have been identified that produce these extremely low temperatures. Three of them are associated with cold air flows over the Iberian Peninsula, and the other two with a lack of significant circulation over the region. A nonlinear association with the North Atlantic Oscillation (NAO) has been identified using log-linear models. The NAO positive phase leads to an increase in the winter frequency of those synoptic patterns associated with stagnant air flow over Iberia, while those characterised by cold, northern flows do not appear to be similarly influenced.Key words. Meteorology and atmospheric dynamics (climatology; synoptic-scale meteorology; general or miscellaneous)
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Han, Han, Jane Liu, Lei Shu, Tijian Wang, and Huiling Yuan. "Local and synoptic meteorological influences on daily variability in summertime surface ozone in eastern China." Atmospheric Chemistry and Physics 20, no. 1 (January 6, 2020): 203–22. http://dx.doi.org/10.5194/acp-20-203-2020.

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Abstract. Ozone pollution in China is influenced by meteorological processes on multiple scales. Using regression analysis and weather classification, we statistically assess the impacts of local and synoptic meteorology on daily variability in surface ozone in eastern China in summer during 2013–2018. In this period, summertime surface ozone in eastern China (20–42∘ N, 110–130∘ E) is among the highest in the world, with regional means of 73.1 and 114.7 µg m−3, respectively, in daily mean and daily maximum 8 h average. Through developing a multiple linear regression (MLR) model driven by local and synoptic weather factors, we establish a quantitative linkage between the daily mean ozone concentrations and meteorology in the study region. The meteorology described by the MLR can explain ∼43 % of the daily variability in summertime surface ozone across eastern China. Among local meteorological factors, relative humidity is the most influential variable in the center and south of eastern China, including the Yangtze River Delta and the Pearl River Delta regions, while temperature is the most influential variable in the north, covering the Beijing–Tianjin–Hebei region. To further examine the synoptic influence of weather conditions explicitly, six predominant synoptic weather patterns (SWPs) over eastern China in summer are objectively identified using the self-organizing map clustering technique. The six SWPs are formed under the integral influence of the East Asian summer monsoon, the western Pacific subtropical high, the Meiyu front, and the typhoon activities. On average, regionally, two SWPs bring about positive ozone anomalies (1.1 µg m−3 or 1.7 % and 2.7 µg m−3 or 4.6 %), when eastern China is under a weak cyclone system or under the prevailing southerly wind. The impact of SWPs on the daily variability in surface ozone varies largely within eastern China. The maximum impact can reach ±8 µg m−3 or ±16 % of the daily mean in some areas. A combination of the regression and the clustering approaches suggests a strong performance of the MLR in predicting the sensitivity of surface ozone in eastern China to the variation of synoptic weather. Our assessment highlights the importance of meteorology in modulating ozone pollution over China.
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Miao, Yucong, Huizheng Che, Xiaoye Zhang, and Shuhua Liu. "Integrated impacts of synoptic forcing and aerosol radiative effect on boundary layer and pollution in the Beijing–Tianjin–Hebei region, China." Atmospheric Chemistry and Physics 20, no. 10 (May 18, 2020): 5899–909. http://dx.doi.org/10.5194/acp-20-5899-2020.

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Abstract. Rapid urbanization and industrialization have led to deterioration of air quality in the Beijing–Tianjin–Hebei (BTH) region due to high loadings of PM2.5. Heavy aerosol pollution frequently occurs in winter, in close relation to the planetary boundary layer (PBL) meteorology. To unravel the physical processes that influence PBL structure and aerosol pollution in BTH, this study combined long-term observational data analyses, synoptic pattern classification, and meteorology–chemistry coupled simulations. During the winter of 2017 and 2018, Beijing and Tangshan often experienced heavy PM2.5 pollution simultaneously, accompanied by strong thermal inversion aloft. These concurrences of pollution in different cities were primarily regulated by the large-scale synoptic conditions. Using principal component analysis with geopotential height fields at the 850 hPa level during winter, two typical synoptic patterns associated with heavy pollution in BTH were identified. One pattern is characterized by a southeast-to-north pressure gradient across BTH, and the other is associated with high pressure in eastern China. Both synoptic types feature warmer air temperature at 1000 m a.g.l., which could suppress the development of the PBL. Under these unfavorable synoptic conditions, aerosols can modulate PBL structure through the radiative effect, which was examined using numerical simulations. The aerosol radiative effect can significantly lower the daytime boundary layer height through cooling the surface layer and heating the upper part of the PBL, leading to the deterioration of air quality. This PBL–aerosol feedback is sensitive to the aerosol vertical structure, which is more effective when the synoptic pattern can distribute more aerosols to the upper PBL.
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Кулібаба, М. О. "CONSTITUENTS OF LEXICAL-SEMANTIC FIELD "SYNOPTIC METEOROLOGY": LEXICOGRAPHICAL ASPECT." Opera in linguistica ukrainiana 1, no. 26 (October 16, 2019): 44–51. http://dx.doi.org/10.18524/2414-0627.2019.26.180943.

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Dissertations / Theses on the topic "Synoptic meteorology"

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Kazempour, Alireza. "Meteorological studies of cut-off lows over Australia with a VHF radar /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phk2361.pdf.

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Badger, Jake. "Mechanisms for rapid synoptic development." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363836.

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Mauger, Guillaume S. "Synoptic sensitivities of subtropical clouds separating aerosol effects from meteorology." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p332443.

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Thesis (Ph. D.)--University of California, San Diego, 2008.
Title from first page of PDF file (viewed October 3, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 117-125).
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Cross, Patrick S. "The California coastal jet : synoptic controls and topographically induced mesoscale structure /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FCross.phd.pdf.

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Melick, Christopher J. "On the synoptic and mesoscale organization of mid-latitude, continental convective snow events." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5569.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2008.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on June 10, 2009) Vita. Includes bibliographical references.
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Betts, Nicholas Leonard. "A synoptic climatology of precipitation in Northern Ireland." Thesis, Queen's University Belfast, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335059.

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Matthews, Tom K. R. "Glacier-climate interactions : a synoptic approach." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12558.

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The reliance on freshwater released by mountain glaciers and ice caps demands that the effects of climate change on these thermally-sensitive systems are evaluated thoroughly. Coupling climate variability to processes of mass and energy exchange at the glacier scale is challenged, however, by a lack of climate data at an appropriately fine spatial resolution. The thesis addresses this challenge through attempting to reconcile this scale mismatch: glacier boundary-layer observations of meteorology and ablation at Vestari Hagafellsjökull, Iceland, and Storglaciären, Sweden, are related to synoptic-scale meteorological variability recorded in gridded, reanalysis data. Specific attention is directed toward synoptic controls on: i) near-surface air temperature lapse rates; ii) stationarity of temperature-index melt model parameters; and iii) glacier-surface ablation. A synoptic weather-typing procedure, which groups days of similar reanalysis meteorology into weather categories , forms the basis of the analytical approach adopted to achieve these aims. Lapse rates at Vestari Hagafellsjökull were found to be shallowest during weather categories characterised by warm, cloud-free weather that encouraged katabatic drainage; steep lapse rates were encountered in weather categories associated with strong synoptic winds. Quantitatively, 26% to 38% of the daily lapse-rate variability could be explained by weather-category and regression-based models utilizing the reanalysis data: a level of skill sufficient to effect appreciable improvements in the accuracy of air temperatures extrapolated vertically over Vestari Hagafellsjökull. Weather categories also highlighted the dynamic nature of the temperature-ablation relationship. Notably, the sensitivity of ablation to changes in air temperature was observed to be non-stationary between weather categories, highlighting vulnerabilities of temperature-index models. An innovative solution to this limitation is suggested: the relationship between temperature and ablation can be varied as a function of weather-category membership. This flexibility leads to an overall improvement in the simulation of daily ablation compared to traditional temperature-index formulations (up to a 14% improvement in the amount of variance explained), without the need for additional meteorological data recorded in-situ. It is concluded that weather categories are highly appropriate for evaluating synoptic controls on glacier meteorology and surface energetics; significant improvements in the parameterization of boundary-layer meteorology and ablation rates are realised through their application.
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Hawksworth, Kevin. "The synoptic climatology of daily precipitation in Wales." Thesis, University of Wales Trinity Saint David, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.683158.

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Jankot, Joshua Charles. "Synoptic Analysis of Large Snowstorms Affecting Boston, Massachusetts." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250189042.

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Dyson, Liesl Letitia. "A dynamical forecasting perspective on synoptic scale weather systems over southern Africa." Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-03272006-153324/.

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Books on the topic "Synoptic meteorology"

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Kurz, Manfred. Synoptic meteorology. 2nd ed. Offenbach am Main: Deutscher Wetterdienst, 1998.

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Lackmann, Gary. Midlatitude Synoptic Meteorology. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1.

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Pao, Chʻeng-lan. Synoptic meteorology in China. Beijing: China Ocean Press, 1987.

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Bluestein, Howard. Synoptic-dynamic meteorology in midlatitudes. New York: Oxford University Press, 1992.

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Bluestein, Howard B. Synoptic-dynamic meteorology in midlatitudes. New York: Oxford University Press, 1992.

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Kurz, Manfred. Synoptische Meteorologie. 2nd ed. Offenbach am Main: Selbstverlag des Deutschen Wetterdienstes, 1990.

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Inagamova, S. I. Osobennosti sinopticheskikh prot︠s︡essov Sredneĭ Azii = Oʻrta Osiyo sinoptik jarayonlarining asosiy xususiyatlari. Tashkent: Sredneaziatskiĭ nauch.-issl. gidrometeorologicheskiĭ in-tut, 2002.

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Exner, Felix M. A first approach towards calculating synoptic forecast charts. Dublin: Meteorological Service, 1995.

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Janicot, Serge. Banque et base de données HEMIS. Boulogne Billancourt: Ministère de l'urbanisme, du logement et des transports, Secrétariat d'Etat auprès du Ministre de l'urbanisme, du logement et des transports, chargé des transports, Direction de la météorologie, 1985.

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N, Barakhtin V., and Prokopʹeva I. P, eds. Voprosy sinopticheskoĭ i aviat͡s︡ionnoĭ meteorologii. Moskva: Moskovskoe otd-nie Gidrometeoizdata, 1985.

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Book chapters on the topic "Synoptic meteorology"

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Ahmad, Latief, Raihana Habib Kanth, Sabah Parvaze, and Syed Sheraz Mahdi. "Synoptic Meteorology." In Experimental Agrometeorology: A Practical Manual, 119–21. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69185-5_16.

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Ćurić, Mladjen, and Vlado Spiridonov. "Bergen Synoptic School." In History of Meteorology, 267–92. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-45032-7_13.

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Cornforth, Rosalind, Zilore Mumba, Douglas J. Parker, Gareth Berry, Nicolas Chapelon, Kone Diakaria, Mariane Diop-Kane, et al. "Synoptic Systems." In Meteorology of Tropical West Africa, 40–89. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118391297.ch2.

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Lackmann, Gary. "Introduction, Background, and Basics." In Midlatitude Synoptic Meteorology, 1–33. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1_1.

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Lackmann, Gary. "Numerical Weather Prediction." In Midlatitude Synoptic Meteorology, 247–302. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1_10.

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Lackmann, Gary. "Weather Forecasting." In Midlatitude Synoptic Meteorology, 303–26. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1_11.

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Lackmann, Gary. "Manual Analysis." In Midlatitude Synoptic Meteorology, 327–35. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1_12.

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Lackmann, Gary. "Quasigeostrophic Theory." In Midlatitude Synoptic Meteorology, 35–66. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1_2.

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Lackmann, Gary. "Isentropic Analysis." In Midlatitude Synoptic Meteorology, 67–78. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1_3.

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Lackmann, Gary. "The Potential Vorticity Framework." In Midlatitude Synoptic Meteorology, 79–94. Boston, MA: American Meteorological Society, 2011. http://dx.doi.org/10.1007/978-1-878220-56-1_4.

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Conference papers on the topic "Synoptic meteorology"

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Brikas, D., P. Siomos, I. Nikolaou, A. Nikolopoulos, D. Papadopoulou-Papaioannou, and T. Diomis. "Synoptic Aspects of the Supercell of Halkidiki, 10 July 2019." In International Conference on Meteorology, Climatology and Atmospheric Physics. Basel Switzerland: MDPI, 2023. http://dx.doi.org/10.3390/environsciproc2023026058.

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Bampzelis, Dimitrios, Stergios Kartsios, Ioannis Pytharoulis, Vassilios Kostopoulos, Christos Spyrou, Ioannis Tegoulias, and Prodromos Zanis. "Synoptic, Dynamic Analysis and Numerical Simulations of Extreme Flood Cases in Pieria Region." In International Conference on Meteorology, Climatology and Atmospheric Physics. Basel Switzerland: MDPI, 2023. http://dx.doi.org/10.3390/environsciproc2023026065.

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Papavasileiou, Georgios, and Theodore M. Giannaros. "The Predictability of the Synoptic-Scale Fire Weather Conditions during the 2018 Mati Wildfire." In International Conference on Meteorology, Climatology and Atmospheric Physics. Basel Switzerland: MDPI, 2023. http://dx.doi.org/10.3390/environsciproc2023026164.

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Prykhodkina, Viktoriia, and Borys Khrystiuk. "Air temperature as a basis for long-term forecasting of break-up ice at the Dnipro cascade reservoirs." In International Conference of Young Scientists on Meteorology, Hydrology and Environmental Monitoring. Ukrainian Hydrometeorological Institute, 2023. http://dx.doi.org/10.15407/icys-mhem.2023.014.

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The ice regime on water bodies depends on large-scale atmospheric processes that develop over large areas and over a long period of time. The basis of long-term forecasts of the ice regime on water bodies are assumptions about the uniformity of atmospheric processes during the synoptic season and the regularity of their trends from season to season. The most widespread approach to long-term forecasting is based on finding relationships between the quantitative indicators of atmospheric circulation over the forecasting object or over separate adjacent (large in the area) synoptic areas or zones and the terms (dates) of ice phenomena appearance (more often their deviation from the norm). Long-term forecasting of ice regime of the Dnipro Cascade reservoirs is very important, first, for the operation of hydroelectric power stations. In addition, such forecasts also ensure the work of other sectors of the economy, namely shipping, fisheries, utilities, etc. Forecasting the terms of break-up ice at the reservoirs is necessary to determine the terms, depth of spring triggering of the reservoirs, and safe transit regime of spring ice run through the Dnipro Cascade. At the same time, there are no methods of the long-term forecasting of break-up ice terms at the Dnipro Cascade reservoirs. Note that the break-up ice at the rivers of Ukraine is largely determined by the air temperature in February (Huseva A.A., 1947). Therefore, the main objective of this research is the determine of the relationship between the mean air temperature for the first decade of February and the break-up ice dates at the Dnipro Cascade reservoirs, as well as to using possibilities assessment of obtained results for the long-term forecasting. The research the used the break-up ice dates at 38 water gauges which are located at the banks of 6 reservoirs of the Dnipro Cascade, as well as the mean air temperature for the first decade of February. This information was obtained from published reference materials prepared by the Central Geophysical Observatory named after Borys Sreznevsky (Kyiv). The research period at each water gauge was taken depending on the water filling year of each reservoir and to 2020, inclusive. Response evaluation of freeze-up at the Dnipro Cascade reservoirs to changes in the air temperature of February were determined by the calculated correlation coefficients between the break-up ice dates and the mean air temperature for the first decade of February. The analysis of observation series for the break-up ice dates at the Dnipro Cascade reservoirs showed that the data of 3 water gauges, namely the Kaniv reservoir - Vyshhorod town, Kamianske reservoir - Svitlovodsk town and Dnipro reservoir - Kamianske town have a significant anthropogenic influence. So, the information about these water gauges was excluded from further research. The break-up ice dates at the reservoirs are characterized by considerable variability. Correlations between the break-up ice dates and mean air temperature for the first decade of February are classified as the medium relationships. As a result, the forecasting dependencies have the rather low quality criteria. Hence, to obtain more acceptable results is necessary to expand the search other predictors of atmospheric processes both in space and time.
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MIKA, János, Csaba KÁROSSY, and László LAKATOS. "Analysis of Frequency Trends in Amalgamated Peczely Macro-Synoptic Types (1971-2020) Characterising Continental-Scale Circulation Parallel to the Global Warming." In Air and Water – Components of the Environment 2023 Conference Proceedings. Casa Cărţii de Ştiinţă, 2023. http://dx.doi.org/10.24193/awc2023_15.

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Macro-synoptic classification, based on spatial fields of sea-level pressure often meet application in applied climatology, weather forecasting and in air-pollution meteorology. One of these classifications was defined by Peczely (1957), establishing 13 original classes influencing actual weather in Hungary. These types, however, are of local concern and not appropriate for diagnostic analysis of continent-scale modification of circulation, related to the on-going global climate change. In the present study, new continent-scale circulation types are defined, based on frequent transition between the original circulation types, two cyclonic (Atlantic and Mediterranean) and two anticyclonic (Northward and Central-Southward) groups are defined, joining 3x3 and 1x4 original circulation types. Frequency trends of these amalgamated circulation types are established in the recent 50 years during which period a monotonical warming trend could be established in the mean near-surface temperature of the Northern Hemisphere. An important feature of these circulation trends is that the significant trends of the amalgamated types are of the same sign in all cases, although the signs of the trends are different for the different amalgamated types. Comparison of these significant 50-year trends with those derived from two 30 years periods, however, this comparison suggests that there is no simple universal relationship between the continent-scale circulation and the hemispherical mean temperature.
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Rozlach, Veronika. "Possibilities of the long-term forecasting of the appearance dates of ice phenomena at the Dnipro cascade reservoirs by heat flow coefficients." In International Conference of Young Scientists on Meteorology, Hydrology and Environmental Monitoring. Ukrainian Hydrometeorological Institute, 2023. http://dx.doi.org/10.15407/icys-mhem.2023.015.

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The development of reliable and accurate long-term ice regime forecasts is one of the most difficult tasks in hydrological practice, which has not yet been satisfactorily solved. Reliable and lead time forecasts of ice phenomena appearance and the freeze-up appearance on reservoirs are essential for the rational use of water resources and for establishing reservoir operation regimes that take into account the requirements and interests of various economic sectors: hydropower, navigation, fisheries, communal services, etc. Currently, the Ukrainian Hydrometeorological Service has no methods for long-term forecasting of ice phenomena on the Dnipro River reservoirs, and those that are officially adopted and used were developed for long-term forecasts of phenomena only on rivers. Therefore, it is extremely relevant to develop methods for long-term forecasting of ice phenomena on the Dnipro reservoirs. The purpose of research is to find correlation links between quantitative indicators of atmospheric processes, which expressed in terms of heat flux coefficient, and the dates of ice phenomena in the reservoirs of the Dnipro cascade and to analyze the results. The paper also analyzes current climate change in the study region, since the ice regime is directly dependent on temperature. Changes in air temperature over the past decades have led to a reduction in the total number of days with ice phenomena on rivers, an increase in water temperature in the autumn and winter, a later of ice phenomena appearance, unstable ice cover, and difficulties in determining the appearance of ice regime phases. Taking into account the change in the climate normal in recent years, the data from 2000 to 2020 were used for the study, since it is from this period intensification of the climate warming process is observed. A representative hydrological gauging station was selected for each of the 6 reservoirs of the Dnipro River and dependencies of ice phenomena on the thermal coefficient, which is defined as the ratio of the number of periods with cold air flows to the number of periods with warm air flows during natural synoptic periods (September 01 - October 10), were obtained. This takes into account the direction of movement of air masses and their intensity. The results show that the correlation coefficients of the forecast dependencies range from 0.0005 to 0.449, and forecast error tolerance was 40-57%. This result indicates that forecasting dependencies cannot provide reliable forecasts. Therefore, the methodological approach used in the study, which was developed in the second half of the twentieth century under conditions of a more stable air temperature regime, cannot be used in modern climatic conditions. To obtain more reliable prognostic dependencies for long-term forecasting of the ice-appearance date, it is necessary to expand the search for predictors that characterize atmospheric processes both in space and time.
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Reports on the topic "Synoptic meteorology"

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Alter, Ross, Michelle Swearingen, and Mihan McKenna. The influence of mesoscale atmospheric convection on local infrasound propagation. Engineer Research and Development Center (U.S.), February 2024. http://dx.doi.org/10.21079/11681/48157.

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Infrasound—that is, acoustic waves with frequencies below the threshold of human hearing—has historically been used to detect and locate distant explosive events over global ranges (≥1,000 km). Simulations over these ranges have traditionally relied on large-scale, synoptic meteorological information. However, infrasound propagation over shorter, local ranges (0–100 km) may be affected by smaller, mesoscale meteorological features. To identify the effects of these mesoscale meteorological features on local infrasound propagation, simulations were conducted using the Weather Research and Forecasting (WRF) meteorological model to approximate the meteorological conditions associated with a series of historical, small-scale explosive test events that occurred at the Big Black Test Site in Bovina, Mississippi. These meteorological conditions were then incorporated into a full-wave acoustic model to generate meteorology-informed predictions of infrasound propagation. A series of WRF simulations was conducted with varying degrees of horizontal resolution—1, 3, and 15 km—to investigate the spatial sensitivity of these infrasound predictions. The results illustrate that convective precipitation events demonstrate potentially observable effects on local infrasound propagation due to strong, heterogeneous gradients in temperature and wind associated with the convective events themselves. Therefore, to accurately predict infrasound propagation on local scales, it may be necessary to use convection-permitting meteorological models with a horizontal resolution ≤4 km at locations and times that support mesoscale convective activity.
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