scholarly journals Autumn – winter minimum temperature changes in the southern Sikhote-Alin mountain range of northeast Asia since 1509 AD

2017 ◽  
Author(s):  
Olga N. Ukhvatkina ◽  
Alexander M. Omelko ◽  
Alexander A. Zhmerenetsky ◽  
Tatyana Y. Petrenko
Keyword(s):  
Solar Activity ◽  
Minimum Temperature ◽  
Large Scale ◽  
Russian Far East ◽  
Far East ◽  
Northeast Asia ◽  
Winter Season ◽  
Limiting Factors ◽  
Mountain Range ◽  
Sikhote Alin

Abstract. The aim of our research was to reconstruct climatic parameters (for the first time for the Sikhote-Alin mountain range) and to compare them with global climate fluctuations. As a result, we have found that one of the most important limiting factors for the study area is the minimum temperatures of the previous autumn-winter season (August–December), and this finding perfectly conforms to that in other territories. We reconstructed the previous August–December minimum temperature for 505 years, from 1509 to 2014. We found three cold periods (1650–1681, 1791–1853, 1865–1918) and four warm periods (1509–1529, 1562–1583, 1747–1781, and 1944–2014). These periods correlate well with reconstructed data for the Northern Hemisphere and the neighboring territories of China and Japan. Our reconstruction has 2–4, 9-,11, 48 and 189-year periods, which are in line with high-frequency fluctuations in ENSO, the short-term solar cycle, PDO fluctuations and the de-Vier quazi-200 solar activity cycle, respectively. We have confirmed the climatic response to solar activity, which corresponds to cold periods during the solar minimum. These comparisons show that our climatic reconstruction based on tree-ring chronology for this area may potentially provide a proxy record for long-term, large-scale past temperature patterns for northeast Asia. The reconstruction reflects the global traits and local variations in the climatic processes of the southern territory of the Russian Far East for more than the past 500 years.

scholarly journals Autumn–winter minimum temperature changes in the southern Sikhote-Alin mountain range of northeastern Asia since 1529 AD

2018 ◽  
Vol 14 (1) ◽  
pp. 57-71 ◽  
Author(s):  
Olga N. Ukhvatkina ◽  
Alexander M. Omelko ◽  
Alexander A. Zhmerenetsky ◽  
Tatyana Y. Petrenko
Keyword(s):  
Solar Activity ◽  
Minimum Temperature ◽  
Southern Oscillation ◽  
Russian Far East ◽  
Far East ◽  
Winter Season ◽  
Mountain Range ◽  
Sikhote Alin ◽  
Northeastern Asia ◽  
Temperature Changes

Abstract. The aim of our research was to reconstruct climatic parameters (for the first time for the Sikhote-Alin mountain range) and to compare them with global climate fluctuations. As a result, we have found that one of the most important limiting factors for the study area is the minimum temperatures of the previous autumn–winter season (August–December), and this finding perfectly conforms to that in other territories. We reconstructed the previous August–December minimum temperature for 485 years, from 1529 to 2014. We found 12 cold periods (1535–1540, 1550–1555, 1643–1649, 1659–1667, 1675–1689, 1722–1735, 1791–1803, 1807–1818, 1822–1827, 1836–1852, 1868–1887, 1911–1925) and seven warm periods (1560–1585, 1600–1610, 1614–1618, 1738–1743, 1756–1759, 1776–1781, 1944–2014). These periods correlate well with reconstructed data for the Northern Hemisphere and the neighboring territories of China and Japan. Our reconstruction has 3-, 9-, 20-, and 200-year periods, which may be in line with high-frequency fluctuations in El Niño–Southern Oscillation (ENSO), the short-term solar cycle, Pacific Decadal Oscillation (PDO) fluctuations, and the 200-year solar activity cycle, respectively. We suppose that the temperature of the North Pacific, expressed by the PDO may make a major contribution to regional climate variations. We also assume that the regional climatic response to solar activity becomes apparent in the temperature changes in the northern part of Pacific Ocean and corresponds to cold periods during the solar minimum. These comparisons show that our climatic reconstruction based on tree ring chronology for this area may potentially provide a proxy record for long-term, large-scale past temperature patterns for northeastern Asia. The reconstruction reflects the global traits and local variations in the climatic processes of the southern territory of the Russian Far East for more than the past 450 years.

scholarly journals Strong Disturbance Impact of Tropical Cyclone Lionrock (2016) on Korean Pine-Broadleaved Forest in the Middle Sikhote-Alin Mountain Range, Russian Far East

Forests ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 1017
Author(s):  
Anna S. Vozmishcheva ◽  
Svetlana N. Bondarchuk ◽  
Mikhail N. Gromyko ◽  
Dmitriy E. Kislov ◽  
Elena A. Pimenova ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Tropical Cyclone ◽  
Large Scale ◽  
Tree Mortality ◽  
Russian Far East ◽  
Far East ◽  
Pinus Koraiensis ◽  
Korean Pine ◽  
Sikhote Alin ◽  
Canopy Damage

Tropical cyclones (hurricanes and typhoons) cause large-scale disturbances in forest ecosystems all over the world. In the summer of 2016, a strong tropical cyclone named Lionrock created windthrow patches in the area of more than 400 km2 on the forested eastern slopes of the Sikhote-Alin Range, in the Russian Far East. Such large-scale forest destruction by wind had never been recorded in the area prior to this event. We examined the tropical cyclone impact upon the forest composition, structure and tree mortality rates on two study sites (1 ha and 0.5 ha in size)—a contiguous windthrow patch site, and a site with partial canopy damage. Korean pine (Pinus koraiensis Siebold and Zucc.), Manchurian fir (Abies nephrolepis Trautv.) and Dahurian larch (Larix cajanderi Mayr.) were the primary tree species represented in the affected forest communities. Combined with the partial canopy damage, 7.7% of trees were blown down by the disturbance event. We determined that this one event mortality rate nearly equaled the average mortality rate for a ten year period for these forests (8.5 ± 4.0%) under normal conditions (no large-scale disturbances). Within a contiguous windthrow patch, tree mortality was determined to be 52.6%, which is significantly higher than the cumulative tree loss for the previous 50 years (42.4%). A substantial portion of thinner-stemmed trees (DBH (diameter measured at breast height) < 30 cm) were wind snapped, and those with larger diameters (DBH > 60 cm) were uprooted. Our results indicate that the probability of tree loss due to catastrophic wind loads increases as a result of the decrease in local density. We believe that tree loss estimates should include the impacts within contiguous patches of windthrows, as well as the patches with only partial tree canopy damage. Strong wind impact forecasting is possible with accounting for species composition within the stand sites and their spatial structure.

Ocypus (Matidus) primoriensis Smetana, a new species from the Russian Far East (Coleoptera, Staphylinidae, Staphylinini)

Zootaxa ◽  
2008 ◽  
Vol 1782 (1) ◽  
pp. 65
Author(s):  
ALEŠ SMETANA ◽  
VASILY GREBENNIKOV
Keyword(s):  
New Species ◽  
Russian Far East ◽  
Far East ◽  
Senior Author ◽  
Mountain Range ◽  
Sikhote Alin ◽  
Undescribed Species ◽  
Junior Author ◽  
A New Species ◽  
The Russian Far East

In a paper dealing with the Chinese species of the subgenera Ocypus Leach, 1819 s. str. and Matidus Motschulsky, 1860, the senior author (Smetana 2007) commented that, in addition to Ocypus coreanus (J. Müller, 1925), an additional, undescribed species occurs in the Russian Far East. Recently, the junior author collected a long series of specimens of this undescribed species in the southernmost part of the Sikhote-Alin mountain range. This material provides the basis for the present paper, in which the new species is described, illustrated and compared to O. coreanus.

State youth policy and its role in social development

2020 ◽  
Vol 22 (5) ◽  
pp. 12-18
Author(s):  
YURI V. BEREZUTSKIY ◽  
◽  
NIKOLAY M. BAYKOV ◽  
Keyword(s):  
Social Development ◽  
Large Scale ◽  
Russian Far East ◽  
Social Activity ◽  
Far East ◽  
The State ◽  
Youth Policy ◽  
Employment Conditions ◽  
Sociological Studies ◽  
Migratory Movements

The article presents the analysis of the state youth policy as an instrument of influence on the state and social development of youth, its social activity. The contradictions that exist between the performance indicators declared by the state policy and the real problems of youth, determined by the living conditions, are indicated. Based on the results of all-Russian and regional sociological studies and statistics, the motives of migratory movements of youth from their territories of residence to the centers of gravity of the country and foreign countries that have more attractive living and employment conditions for youth are justified. Using the example of the Russian Far East, the dysfunctional consequences of the clerical-bureaucratic approach laid down in the state youth policy to quantify the state of youth ignoring its large-scale migration outflow from the territories of residence are substantiated. Scientific and practical recommendations on improvement of indicators of the state youth policy promoting strengthening of its role in providing the basic needs of youth in various spheres of activity, especially in development of youth business are offered.

scholarly journals Tree-ring-based spring precipitation reconstruction in the Sikhote-Alin' Mountain range

2021 ◽  
Vol 17 (2) ◽  
pp. 951-967
Author(s):  
Olga Ukhvatkina ◽  
Alexander Omelko ◽  
Dmitriy Kislov ◽  
Alexander Zhmerenetsky ◽  
Tatyana Epifanova ◽  
...  
Keyword(s):  
Climate Variability ◽  
Tree Ring ◽  
Southern Oscillation ◽  
Russian Far East ◽  
Pinus Koraiensis ◽  
Mountain Range ◽  
Korean Pine ◽  
Sikhote Alin ◽  
The Impact ◽  
Standard Tree

Abstract. Climate reconstructions provide important insight into past climate variability and help us to understand the large-scale climate drivers and impact of climate change. However, our knowledge about long-term year-to-year climate variability is still limited due to the lack of high-resolution reconstructions. Here, we present the first precipitation reconstructions based on tree rings from Pinus koraiensis (Korean pine) from three sites placed along a latitudinal (330 km) gradient in the Sikhote-Alin' mountains in the Russian Far East. The tree-ring width chronologies were built using standard tree-ring procedures. We reconstructed the April–June precipitation for the southern Sikhote-Alin' (SSA), March–June precipitation for the central Sikhote-Alin' (CSA) and March–July precipitation for the northwestern Sikhote-Alin' (NSA) over the years 1602 to 2013, 1804 to 2009 and 1858 to 2013, respectively. We found that an important limiting factor for Korean pine growth was precipitation within the period when the air current coming from the continent during the cold period is replaced with the impact of the wet ocean air current. We identified that common wet years for SSA, CSA and NSA occurred in 1805, 1853, 1877, 1903, 1906, 1927, 1983 and 2009 and common dry years occurred in 1821, 1869, 1919, 1949 and 2003. Our reconstructions have 3-, 15- and 60-year periods, which suggests the influence of the El Niño–Southern Oscillation and Pacific Decadal Oscillation on the region's climate and relevant processes. Despite the impact of various global processes, the main contribution to precipitation formation in the study area is still made by the Pacific Ocean, which determines their amount and periodicity.

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