scholarly journals Lidar observations of pyrocumulonimbus smoke plumes in the UTLS over Tomsk (Western Siberia, Russia) from 2000 to 2017

2018 ◽  
Author(s):  
Vladimir V. Zuev ◽  
Vladislav V. Gerasimov ◽  
Aleksei V. Nevzorov ◽  
Ekaterina S. Savelieva
Keyword(s):  
Western Siberia ◽  
Far East ◽  
Volcanic Eruptions ◽  
Combustion Products ◽  
Air Masses ◽  
North East ◽  
Smoke Plumes ◽  
Strong Source ◽  
The Usa ◽  
Aerosol Plume

Abstract. Large volcanic eruptions with the volcanic explosivity index (VEI) ≥ 3 are widely known to be the strongest source of long-lived aerosol in the upper troposphere and lower stratosphere (UTLS). However, the latest studies have revealed that massive forest (bush) fires represent another strong source of short-term (but intense) aerosol perturbations in the UTLS if combustion products from the fires reach these altitudes via convective ascent within pyrocumulonimbus clouds (pyroCbs). PyroCbs, generated by boreal wildfires in North America and North-East Asia and injecting smoke plumes into the UTLS, have been intensively studied using both ground- and space-based instruments since the beginning of the 21 century. In this paper, we focus on aerosol layers observed in the UTLS over Tomsk (56.48° N, 85.05° E, Western Siberia, Russia) that could be smoke plumes from such pyroCb events occurred in the 2000–2017 period. Using the HYSPLIT trajectory analysis, we have reliably assigned ten aerosol layers to nine out of more than 100 documented pyroCb events, the aftereffects of which could potentially be detected in the UTLS over Tomsk. All of the nine pyroCb events occurred in the USA and Canada: one event per year was in 2000, 2002, 2003, 2015, and 2016, whereas two events per year were in 2013 and 2017. No plumes from pyroCbs originating in the boreal zone of Siberia and the Far East (to the east of Tomsk) were observed in the UTLS over Tomsk between 2000 and 2017. We conclude that the lifetimes of pyroCb plumes to be detected in the UTLS using ground-based lidars are less than about a month, i.e. plumes from pyroCbs generated by wildfires to the east of Tomsk can significantly diffuse before reaching the Tomsk lidar station by the westerly zonal transport of air masses. A comparative analysis of the contributions from pyroCb events and volcanic eruptions with VEI ≥ 3 to aerosol loading of the UTLS over Tomsk has also been made. Finally, an aerosol plume from the Aleutian volcano Bogoslof erupted with VEI = 3 on 28 May 2017 was detected at altitudes between 10.8 and 13.5 km over Tomsk on 16 June 2017.

scholarly journals Lidar observations of pyrocumulonimbus smoke plumes in the UTLS over Tomsk (Western Siberia, Russia) from 2000 to 2017

2019 ◽  
Vol 19 (5) ◽  
pp. 3341-3356 ◽  
Author(s):  
Vladimir V. Zuev ◽  
Vladislav V. Gerasimov ◽  
Aleksei V. Nevzorov ◽  
Ekaterina S. Savelieva
Keyword(s):  
North America ◽  
Western Siberia ◽  
Far East ◽  
Volcanic Eruptions ◽  
Combustion Products ◽  
Backscatter Coefficient ◽  
Average Value ◽  
Aerosol Loading ◽  
Smoke Plumes ◽  
The Usa

Abstract. Large volcanic eruptions with the volcanic explosivity index (VEI) ≥ 3 are widely known to be the strongest source of long-lived aerosol in the upper troposphere and lower stratosphere (UTLS). However, the latest studies have revealed that massive forest (bush) fires represent another strong source of short-term (but intense) aerosol perturbations in the UTLS if combustion products from the fires reach these altitudes via convective ascent within pyrocumulonimbus clouds (pyroCbs). PyroCbs, generated by boreal wildfires in North America and northeastern Asia and injecting smoke plumes into the UTLS, have been intensively studied using both ground- and space-based instruments since the beginning of the 21st century. In this paper, we focus on aerosol layers observed in the UTLS over Tomsk (56.48∘ N, 85.05∘ E, Western Siberia, Russia) that could be smoke plumes from such pyroCb events occurring in the 2000–2017 period. Using the HYSPLIT trajectory analysis, we have reliably assigned nine aerosol layers to 8 out of more than 100 documented pyroCb events, the aftereffects of which could potentially be detected in the UTLS over Tomsk. All the eight pyroCb events occurred in the USA and Canada: one event per year occurred in 2000, 2002, 2003, 2013, 2015, and 2016, whereas two events occurred in 2017. No plumes from pyroCbs originating in the boreal zone of Siberia and the Far East (to the east of Tomsk) were observed in the UTLS over Tomsk between 2000 and 2017. We conclude that the time durations for pyroCb plumes to be detected in the UTLS using ground-based lidars are less than about a month, i.e., plumes from pyroCbs generated by wildfires to the east of Tomsk can significantly diffuse before reaching the Tomsk lidar station by the westerly zonal transport of air masses. A comparative analysis of the contributions from pyroCb events and volcanic eruptions with VEI ≥ 3 to aerosol loading of the UTLS over Tomsk showed the following. Plumes from two or more pyroCbs that have occurred in North America in a single year are able to markedly increase the aerosol loading compared to the previous year. The annual average value of the integrated aerosol backscatter coefficient Bπ,532a increased by 14.8 % in 2017 compared to that in 2016 due to multiple pyroCbs occurring in British Columbia (Canada) in August 2017. The aftereffects of pyroCb events are comparable to those of volcanic eruptions with VEI ≤ 3, but even multiple pyroCbs can hardly compete with volcanic eruptions with VEI = 4.

scholarly journals 30-year lidar observations of the stratospheric aerosol layer state over Tomsk (Western Siberia, Russia)

2016 ◽  
Author(s):  
Vladimir V. Zuev ◽  
Vladimir D. Burlakov ◽  
Aleksei V. Nevzorov ◽  
Vladimir L. Pravdin ◽  
Ekaterina S. Savelieva ◽  
...  
Keyword(s):  
Forest Fires ◽  
Western Siberia ◽  
Volcanic Eruptions ◽  
Stratospheric Aerosol ◽  
Aerosol Layer ◽  
Smoke Plumes ◽  
Soufriere Hills ◽  
The Usa ◽  
Global Volcanism ◽  
Langley Research Center

Abstract. There are only four lidar stations in the world, which have almost continuously performed observations of the stratospheric aerosol layer (SAL) state for over the last 30 years. The longest time series of the SAL lidar measurements have been accumulated at the Mauna Loa Observatory (Hawaii) since 1973, the NASA Langley Research Center (Hampton, Virginia) since 1974, and Garmisch-Partenkirchen (Germany) since 1976. The fourth lidar station we present started to perform routine observations of the SAL parameters in Tomsk (56.48° N, 85.05° E, Western Siberia, Russia) in 1986. In this paper, we mainly focus on and discuss the stratospheric background period from 2000 to 2005 and the causes of the SAL perturbations over Tomsk in the 2006–2015 period. During the last decade, volcanic aerosol plumes from tropical Mt. Manam, Soufriere Hills, Rabaul, Merapi, Nabro, and Kelut, and extratropical (northern) Mt. Okmok, Kasatochi, Redoubt, Sarychev Peak, Eyjafjallajökull, and Grimsvötn were detected in the stratosphere over Tomsk. When it was possible, we used the NOAA HYSPLIT trajectory model to assign aerosol layers observed over Tomsk to the corresponding volcanic eruptions. The trajectory analysis highlighted some surprising results. For example, in cases of the Okmok, Kasatochi, and Eyjafjallajökull eruptions, the HYSPLIT air-mass backward trajectories, started from altitudes of aerosol layers detected over Tomsk with a lidar, passed over these volcanoes on their eruption days at altitudes higher than the maximum plume altitudes given by the Smithsonian Institution Global Volcanism Program. An explanation of these facts is suggested. The role of both tropical and northern volcanoes eruptions in volcanogenic aerosol loading of the mid-latitude stratosphere is also discussed. In addition to volcanoes, we considered other possible causes of the SAL perturbations over Tomsk, i.e. the polar stratospheric cloud (PSC) events and smoke plumes from strong forest fires. At least two PSC events were detected in 1995 and 2007. We also make an assumption that both the Kelut volcano plume (Indonesia, February 2014) and smoke plumes from massive forest fires occurred in Canada (137 fires in the Northwest Territories, July 2014) and the USA (the Happy Camp Complex fire in California, August–October 2014), with equal probability, could be the cause of the SAL perturbations over Tomsk during the first quarter of 2015.

scholarly journals Seasonally changing contribution of sea ice and snow cover to uncertainty in multi-decadal Eurasian surface air temperature trends based on CESM simulations

2021 ◽  
Author(s):  
Zhaomin Ding ◽  
Renguang Wu
Keyword(s):  
Sea Ice ◽  
Air Temperature ◽  
Western Siberia ◽  
Russian Far East ◽  
Far East ◽  
Surface Air Temperature ◽  
The Caspian Sea ◽  
Sea Ice Concentration ◽  
Northern Siberia ◽  
The Impact

AbstractThis study investigates the impact of sea ice and snow changes on surface air temperature (SAT) trends on the multidecadal time scale over the mid- and high-latitudes of Eurasia during boreal autumn, winter and spring based on a 30-member ensemble simulations of the Community Earth System Model (CESM). A dynamical adjustment method is used to remove the internal component of circulation-induced SAT trends. The leading mode of dynamically adjusted SAT trends is featured by same-sign anomalies extending from northern Europe to central Siberia and to the Russian Far East, respectively, during boreal spring and autumn, and confined to western Siberia during winter. The internally generated component of sea ice concentration trends over the Barents-Kara Seas contributes to the differences in the thermodynamic component of internal SAT trends across the ensemble over adjacent northern Siberia during all the three seasons. The sea ice effect is largest in autumn and smallest in winter. Eurasian snow changes contribute to the spread in dynamically adjusted SAT trends as well around the periphery of snow covered region by modulating surface heat flux changes. The snow effect is identified over northeast Europe-western Siberia in autumn, north of the Caspian Sea in winter, and over eastern Europe-northern Siberia in spring. The effects of sea ice and snow on the SAT trends are realized mainly by modulating upward shortwave and longwave radiation fluxes.

scholarly journals EXTERNAL DEFENSIVE CONSTRUCTIONS OF JURCHEN CITES IN EASTERN XIA

2020 ◽  
Author(s):  
Н.Г. Артемьева ◽  
С.В. Макиевский
Keyword(s):  
Far East ◽  
Far East Of Russia ◽  
13Th Century ◽  
Mountain Landscape ◽  
Topographic Features ◽  
North East ◽  
The Far East ◽  
Natural Terrain ◽  
First Time

Государство Восточное Ся (1215–1233 гг.) было создано чжурчжэнями для защиты от монгольского вторжения на территории Северо-Востока Китая, в которую входил юг Дальнего Востока России. При строительстве городов-крепостей широко использовались естественно-географические условия. Горный ландшафт создавал возможность строить горные городища в распадках сопок, используя природные условия как дополнительные преграды. При исследовании фортификационных сооружений Шайгинского городища были выявлены основные и дополнительные оборонные сооружения чжурчжэньских укрепленных поселений, прослежена эволюция средневекового оборонного зодчества Дальнего Востока. В наиболее уязвимых местах возводились внешние дополнительные сооружения – реданы и отсекающие валы. Редан Шайгинского городища представлял собой сооружение шириной около 30 м, окруженное тремя валами и тремя рвами. В качестве дополнительного укрепления применялись отсекающие рвы, которые перекрывали подходы по мысам к городищу. На Шайгинском городище прослежено четыре отсекающих рва. Внешние фортификационные сооружения в виде редана и отсекающих рвов выполняли функцию первой линии защиты чжурчжэньских городов-крепостей. Эти укрепления впервые зафиксированы на горных городищах периода государства Восточного Ся. Их можно считать достижением чжурчжэньских градостроителей XIII в. The Eastern Xia Kingdom(1215–1233) was established by the Jurchens to defend themselves against invasions of the Mongols in North-East Chinathat included the southern parts of the Far East of Russia. Local topographic features were widely used in construction of city fortresses. Mountain landscape provided an opportunity to build mountainous fortified settlements into narrow valleys of sopkas to follow the natural terrain contours and use them to create additional obstacles. Excavations of the Shayginskoye hillfort revealed main and additional defensive constructions of Jurchen fortified settlements tracing the evolution of medieval defensive architecture in the Far East. Additional external constructions such as redans and cut-off ramparts were erected in soft spots of fortifications. The redan of the Shayginskoye hillfort was a construction around 20 mwide which was surrounded with three ramparts and three ditches. Cut-off ditches that closed access to the hillfort through promontories were used as an additional obstacle. Four cut-off ditches were identified at the Shayginskoye hillfort. External fortification constructions such as redans and cut-off ditches served to be the first defensive line of Jurchen fortress cities. This type of fortifications was recorded for the first time in mountainous hillforts of Eastern Xia. They can be regarded as an achievement of Jurchen town planners of the 13th century.

Checklist of oribatid mites (Acari, Oribatida) of the Russian Far East and Northeast of China

Zootaxa ◽  
2018 ◽  
Vol 4472 (2) ◽  
pp. 201 ◽  
Author(s):  
NIKOLAY A. RYABININ ◽  
DONG LIU ◽  
MEIXIANG GAO ◽  
DONG-HUI WU
Keyword(s):  
Russian Far East ◽  
Far East ◽  
Historical Review ◽  
Oribatid Mites ◽  
The South ◽  
North East ◽  
The Far East ◽  
Late Tertiary ◽  
Northeast Of China ◽  
The Russian Far East

The present paper reviews the taxonomic studies of the mite suborder Oribatida in the Russian Far East South and Chinese North-East Territories. At present, 746 species of oribatid mites are registered in China, including 175 species in the soils of Northeast China. In the Russian Far East, there were 605 species of oribatids, including 344 species in the south of the Far East. The fauna of the oribatid mites of the Northeast of China and the south of the Russian Far East has 446 species and subspecies representing 190 genera and 80 families. 72 species of oribatid are common for both territories. The modern fauna of the oribatid mites of the Northeast of China and the south of the Far East was formed as a result of prolonged interaction between the boreal and palaearchaearctic faunas. The oribatid fauna of this region is distinguished by the presence of a large number of endemics, some of which are relics of the late Tertiary time and which can be considered as autochthonous. The checklist includes data from more than 100 locations of this enormous region. In addition, a short climatic and historical review of oribatid mites study is presented. 

Acrolepiopsis assectella. [Distribution map].

2017 ◽  
Author(s):  
Keyword(s):  
New York ◽  
Prince Edward Island ◽  
Western Siberia ◽  
Far East ◽  
Distribution Map ◽  
Central Russia ◽  
Acrolepiopsis Assectella ◽  
Northern Russia ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Acrolepiopsis assectella Zeller. Lepidoptera: Plutellidae. Hosts: Allium spp. Information is given on the geographical distribution in Europe (Austria, Belarus, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Corsica, Germany, Greece, Hungary, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Moldova, Netherlands, Norway, Poland, Portugal, Romania, Russia, Central Russia, Eastern Siberia, Far East, Northern Russia, Western Siberia, Serbia, Slovakia, Slovenia, Spain, Mainland Spain, Balearic Islands, Canary Islands, Mainland Spain, Sweden, Switzerland, UK, Channel Islands, England Wales, Ukraine), Asia (Armenia, Azerbaijan, Republic of Georgia, Kazakhstan, Kyrgyzstan, Mongolia), Africa (Algeria), North America (Canada, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, USA, New York, Vermont).

Ips subelongatus. [Distribution map].

2008 ◽  
Author(s):  
Keyword(s):  
Geographical Distribution ◽  
Western Siberia ◽  
Far East ◽  
Eastern Siberia ◽  
Distribution Map ◽  
Northern Russia ◽  
Ips Subelongatus ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Ips subelongatus (Motschulsky). Coleoptera: Scolytidae. Hosts: Abies, Larix, Picea and Pinus species. Information is given on the geographical distribution in Europe (Finland, Eastern Siberia, Far East Northern Russia, and Western Siberia) and Asia (Heilongjiang, Jilin, Liaoning and Nei Menggu, China; Hokkaido and Honshu, Japan; Korea Democratic People's Republic; Korea Republic; and Mongolia).

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