scholarly journals Synoptic classification of atmospheric circulation over the south Eastern Siberia and its relationship with glacier dynamics

2021 ◽  
Author(s):  
Olga Osipova ◽  
Eduard Osipov
Keyword(s):  
Atmospheric Circulation ◽  
Lower Troposphere ◽  
Basic Research ◽  
Eastern Siberia ◽  
Weather Types ◽  
Synoptic Classification ◽  
South Eastern ◽  
Environmental Prediction ◽  
Autumn And Winter

<p>The energy balance of a glacial surface and its melting is strongly controlled by altering synoptic processes in the lower troposphere. Therefore, classification of the processes of atmospheric circulation over the glaciarized regions is very important for better understanding of long-term trends in glacier changes. The glaciers of the Kodar Ridge (south Eastern Siberia) have shrunk in area by about 60% since the mid-19th century, with the largest decline taking place at the end of the 20th century. We have compiled the daily catalog of the weather types (WTs) from 1970 to 2020 based on the Jenkinson and Collison objective classification applied for the area (47.5–67.5° N, 102.5–132.5° E) centered over the Kodar Ridge. The gridded sea level pressure (SLP) and isobaric 700 hPa data was obtained from the National Center for Environmental Prediction / National Center for Atmospheric Research (NCEP/NCAR) reanalysis. In total, 26 WTs were identified and the frequency of different synoptic types was statistically analyzed. The most frequent group of WTs is advective (40%), followed by anticyclonic (34%) and cyclonic (14%). The unclassified type totally accounts for 13%. We revealed the differences between the frequency of synoptic processes in seasonal cycle and at different atmospheric levels (SLP and 700 hPa). Cyclonic weather types usually prevail in summer, while anticyclonic ones in autumn and winter. At 700 hPa level, the frequency of anticyclonic WTs increases in summer, while the frequency of advective types increases in all seasons. Over the past 50 years, the frequency of anticyclonic types demonstrates decreasing trend, while that of cyclonic and advective weather types increased (SLP data). In the 1980s and early 1990s the frequency of cyclonic WTs decreased, which could lead to a decrease in cloud cover over the Kodar region and an increase in net radiation of glacier surfaces. This study was supported by the Russian Foundation for Basic Research (project No. 19-05-00668).</p>

scholarly journals Synoptic classification of lower troposphere profiles for dust days

2010 ◽  
Vol 115 (D11) ◽  
Author(s):  
E. Ganor ◽  
A. Stupp ◽  
I. Osetinsky ◽  
P. Alpert
Keyword(s):  
Lower Troposphere ◽  
Synoptic Classification

scholarly journals Regional Differentiation in Probability of Ice Days Occurrence in Poland

2014 ◽  
Vol 33 (3) ◽  
pp. 89-99 ◽  
Author(s):  
Ewa Łupikasza ◽  
Tadeusz Niedźwiedź ◽  
Łukasz Małarzewski
Keyword(s):  
Atmospheric Circulation ◽  
Spatial Differentiation ◽  
Regional Differentiation ◽  
Daily Maximum ◽  
Regional Variability ◽  
Entire Area ◽  
South Eastern ◽  
Circulation Types ◽  
Air Temperatures

Abstract This paper aims at recognizing spatial differentiation in probability of ice days occurrence with reference to atmospheric circulation, using regional classification of circulation types for Poland. Daily maximum air temperatures measured at nine meteorological stations were used to recognize the ice days occurrence in the period from January 1951 to March 2014. The relations between the ice days occurrence and atmospheric circulation were analysed using catalogues of circulation types compiled for nine grid boxes within Poland. Linkage between the frequency of ice days and atmospheric circulation was recognized in the period of January 2001 - March 2014. A decreasing tendency in the frequency of the occurrence of winter ice days was found. The occurrence of ice days in Poland is clearly related to atmospheric circulation. In the entire area of Poland their occurrence is favoured by eastern and south-eastern advection of air during anticyclonic conditions (types Ea nad SEa). Regional variability is also noticeable.

Agro-landscape and ecological zoning for crop and meadow production in Eastern Siberia

2020 ◽  
Author(s):  
L.S. Trofimova ◽  
◽  
I. A. Trofimov
Keyword(s):  
Eastern Siberia ◽  
Economic Region

The agro-landscape and ecological zoning of the East Siberian natural and economic region has been developed. A map, legend to the map, classification of natural forage lands and classification of deer pastures have been compiled. A detailed description of all 136 designated zoning units (zones, mountain territories, provinces, districts) is given.

Modelling wildfire activity in Iberia with different atmospheric circulation weather types

2013 ◽  
Vol 36 (7) ◽  
pp. 2761-2778 ◽  
Author(s):  
Ricardo M. Trigo ◽  
Pedro M. Sousa ◽  
Mário G. Pereira ◽  
Domingo Rasilla ◽  
Célia M. Gouveia
Keyword(s):  
Atmospheric Circulation ◽  
Weather Types

scholarly journals Euro-Atlantic Atmospheric Circulation during the Late Maunder Minimum

2018 ◽  
Vol 31 (10) ◽  
pp. 3849-3863 ◽  
Author(s):  
Javier Mellado-Cano ◽  
David Barriopedro ◽  
Ricardo García-Herrera ◽  
Ricardo M. Trigo ◽  
Mari Carmen Álvarez-Castro
Keyword(s):  
Atmospheric Circulation ◽  
North Atlantic ◽  
Decadal Variability ◽  
Complete Classification ◽  
Maunder Minimum ◽  
The North ◽  
Late Maunder Minimum ◽  
The North Atlantic Oscillation ◽  
Nao Pattern

Abstract This paper presents observational evidence of the atmospheric circulation during the Late Maunder Minimum (LMM, 1685–1715) based on daily wind direction observations from ships in the English Channel. Four wind directional indices and 8-point wind roses are derived at monthly scales to characterize the LMM. The results indicate that the LMM was characterized by a pronounced meridional circulation and a marked reduction in the frequency of westerly days all year round, as compared to the present (1981–2010). The winter circulation contributed the most to the cold conditions. Nevertheless, findings indicate that the LMM in Europe was more heterogeneous than previously thought, displaying contrasting spatial patterns in both circulation and temperature, as well as large decadal variability. In particular, there was an increase of northerly winds favoring colder winters in the first half of the LMM, but enhanced southerlies contributing to milder conditions in the second half of the LMM. The analysis of the atmospheric circulation yields a new and complete classification of LMM winters. The temperature inferred from the atmospheric circulation confirms the majority of extremely cold winters well documented in the literature, while uncovering other less documented cold and mild winters. The results also suggest a nonstationarity of the North Atlantic Oscillation (NAO) pattern within the LMM, with extremely cold winters being driven by negative phases of a “high zonal” NAO pattern and “low zonal” NAO patterns dominating during moderately cold winters.

OPPORTUNITIES FOR THE DEVELOPMENT OF MILITARY TOURISM IN UKRAINE

2018 ◽  
Author(s):  
Mariya Lushchyk ◽  
◽  
Yaroslava Moskvyak ◽  
Keyword(s):  
Young People ◽  
Basic Research ◽  
Military History ◽  
Theoretical Studies ◽  
Scientific Publications ◽  
Military Life ◽  
Historical Reconstructions ◽  
Constant Interest

The constant interest of people in military history, historical battles, battles and other military heritage promotes military tourism. However, despite the presence of a certain array of research and publications on various aspects of the development of this type of tourism, basic research in terms of defining and classifying types of military tourism, the geography of military tourism in Ukraine is not identified. Therefore, theoretical studies of the essence of military tourism, as well as the potential and opportunities for the development of this type of tourism in Ukraine are timely and relevant. To achieve this goal, an analysis of the main theoretical provisions and principles of military tourism, covered in domestic and foreign scientific publications. It is proposed to understand military tourism as one of the types of tourism, which involves visiting historical and modern military sites / institutions / locations, attracting tourists to the realities of modern military life, in safe military events or their historical reconstructions, etc. Among the tasks of military trism, its importance is clarified, first of all, for the patriotic upbringing of young people, especially in modern conditions, when the heroism and love of freedom of ancestors comes to life in Ukrainian soldiers who defend the country from Russian aggression. The main motives of tourists for military travel are described. The typification of the main criteria and principles of classification of military tourism in tourist activity is given. The author's classification of types of military tourism is offered, according to which military-historical, military and military-event types of tourism are distinguished. «Military» places and locations of Ukraine were monitored. This allowed to identify potentially popular for tourists objects: ramparts, fortresses, castles, castles, bastions, forts, defensive monasteries, temples, cathedrals, fortresses, defensive lines, battlefields, battles and military glory, which are associated with feats of national heroes, museums, memorial complexes, monuments dedicated to military themes, dioramas, bunkers, bunkers, DOTs, trenches, remnants of equipment, etc., which can be used in the development of new tourist products of military tourism.

Morphological and isotopic study of pedogenic carbonate coatings from steppe and forest-steppe areas of Baikal region, South-Eastern Siberia

CATENA ◽  
2021 ◽  
Vol 196 ◽  
pp. 104817 ◽  
Author(s):  
Viktor Golubtsov ◽  
Maria Bronnikova ◽  
Olga Khokhlova ◽  
Anna Cherkashina ◽  
Sofiia Turchinskaia
Keyword(s):  
Baikal Region ◽  
Forest Steppe ◽  
Eastern Siberia ◽  
Isotopic Study ◽  
Pedogenic Carbonate ◽  
South Eastern

Effect of the Leeuwin Current upon sea surface temperatures off south-western Australia

1984 ◽  
Vol 35 (4) ◽  
pp. 487 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Western Australia ◽  
Coastal Waters ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Leeuwin Current ◽  
South Eastern ◽  
Surface Temperatures ◽  
Autumn And Winter

Comparison of long-term mean monthly sea surface temperatures of coastal waters at comparable latitudes off south-eastern and south-westem Australia shows that, during the duration of the Leeuwin Current in autumn and winter, sea surface temperatures are 1-3�C higher off south-western Australia.

scholarly journals Impact of upstream moisture structure on a back-building convective precipitation system in south-eastern France during HyMeX IOP13

2018 ◽  
Vol 18 (23) ◽  
pp. 16845-16862 ◽  
Author(s):  
Keun-Ok Lee ◽  
Cyrille Flamant ◽  
Fanny Duffourg ◽  
Véronique Ducrocq ◽  
Jean-Pierre Chaboureau
Keyword(s):  
Moisture Content ◽  
Precipitation Amount ◽  
Lower Troposphere ◽  
Precipitation Event ◽  
Total Precipitation ◽  
Mountainous Region ◽  
Southern France ◽  
South Eastern ◽  
Sensitivity Experiments ◽  
Observation Period

Abstract. The present study examines the impact of the environmental moisture structure in the lower troposphere (below 2 km above sea level, a.s.l.) on the precipitation development, observed in southern France during Intensive Observation Period (IOP) 13 of the first Special Observation Period of the Hydrological cycle in the Mediterranean Experiment (HyMeX SOP-1), through a series of sensitivity experiments using the non-hydrostatic mesoscale atmospheric numerical model (Meso-NH). The control simulation (CNTL) and all the other 12 sensitivity experiments examined in this study succeed in reproducing a heavy precipitation event (HPE) in the coastal mountainous region of Var in south-eastern France as observed. The sensitivity experiments are designed to investigate the response of the HPE to the variability of the water vapour content upstream in the moist marine atmospheric boundary layer (MABL) and the drier air above. The comparisons between CNTL and the 12 sensitivity experiments show how the life cycle of precipitation associated with the HPE, but also the upstream flow (over the sea), is modified, even for moisture content changes of only 1 g kg−1 below 2 km a.s.l. Within the low-level wind convergence between southerlies and south-westerlies, a small increase of moisture content in the MABL prolongs moderate precipitation (≥5 mm in 15 min) and enlarges the area of weak precipitation (≥1 mm in 15 min). The moistening in the 1–2 km a.s.l. layer, just above the MABL, prolongs the duration of moderate precipitation, for a similar total precipitation amount as in CNTL. The drier MABL and 1–2 km a.s.l. layer shorten the lifetime of precipitation and reduce the total precipitation amount with respect to CNTL. We also found that the moisture in the MABL has a stronger impact on producing enhanced precipitation (both in terms of amount and intensity) than the moisture just above (1–2 km a.s.l.). Also, it is worth noting that adding moisture in the MABL does not necessarily lead to enhanced precipitation amount. In moistening the MABL, the duration of moderate precipitation increases with increasing moisture as does the area covered by weak precipitation, while the area covered by the intense precipitation (≥30 mm) decreases. Despite a simplified moisture-profile modification approach, this study suggests that moisture structure in the lower troposphere is key for accurate prediction at short-term range of the timing and location of precipitation in the coastal mountainous region in southern France.

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