Advanced methods for correcting measured precipitation and results of their application in the polar regions of Russia and North America

2007 ◽  
Vol 32 (4) ◽  
pp. 229-244 ◽  
Author(s):  
E. G. Bogdanova ◽  
B. M. Il’in ◽  
S. Yu. Gavrilova
Keyword(s):  
North America ◽  
Polar Regions ◽  
Regions Of Russia

Human biogeography and climate change in Siberia and Arctic North America in the fourth and fifth millennia BP

1990 ◽  
Vol 330 (1615) ◽  
pp. 665-670 ◽  
Keyword(s):  
North America ◽  
The Arctic ◽  
Polar Regions ◽  
Before Present ◽  
Yenisei River ◽  
Northeastern Asia ◽  
Time Period ◽  
The Yenisei River ◽  
Historical Relation ◽  
Small Tool

This paper explores the relation between the geographic shifts in prehistoric hunting populations and changes in climate between 4500 and 3000 before present (BP) within the polar regions from the Yenisei River in Siberia to Greenland. We have chosen this time period because major human geographic changes occurred over much of northeastern Asia and northern North America, and because these changes appear to be linked, at least in part, to a palaeoclimatic fluctuations. The cultures under consideration have been termed the Early and Middle Neolithic (Syalakh and Bel’kachi) in Siberia and the Arctic Small Tool Tradition (with such local variants as Denbigh, Independence I, Pre-Dorset, and Sarqaq) in North America. Despite these terminological differences, these groups shared such a close similarity in their technology and adaptive patterns that they must have once shared a direct historical relation.

scholarly journals Taxonomy, phylogeny and biogeography of the late Famennian conodont genus <i>Mashkovia</i>

1998 ◽  
Vol 17 (2) ◽  
pp. 119-124 ◽  
Author(s):  
Zdzislaw Belka
Keyword(s):  
North America ◽  
Climatic Factors ◽  
Anterior Part ◽  
Apparent Absence ◽  
Upper Silesia ◽  
Diagnostic Characters ◽  
Southern Poland ◽  
Regions Of Russia

Abstract. Mashkovia is one of the provincial conodonts which developed during late Famennian time in the cratonic regions of Russia. In this study, the taxonomy of this genus is revised, based on diagnostic characters of the Pa elements, such as the morphology of the anterior part of the platform, the ornamentation and the shape of the secondary keels. As a consequence, four species, including M. silesiensis n. sp. now discovered in Upper Silesia of southern Poland, are distinguished. The apparent absence of Mashkovia from North America, Variscan Europe, Australia and Africa cannot be simply explained by using temperature or other global climatic factors as a reason for the provincialism. Currents and/or local palaeoecologic factors were probably more important in controlling the distribution of these conodonts.

Future prospects for Arctic wildlands in North America

Polar Record ◽  
1981 ◽  
Vol 20 (128) ◽  
pp. 417-424
Author(s):  
Walter B. Parker
Keyword(s):  
North America ◽  
The Arctic ◽  
Polar Regions ◽  
Future Prospects ◽  
Resident Population ◽  
The People ◽  
Intensive Use ◽  
The Antarctic ◽  
Influence Perceptions

The fascination of the polar regions for the people of southern climes has always rested on the aura of mystery created by inaccessibility and the sense of prospective freedom offered by lands that were supposedly not claimed or utilized. Later, the intensive use of Arctic lands by their aboriginal inhabitants became clearer to those southerners who took the time to live for long periods in the Arctic, especially those whose opinions were open to the reality of what they observed around them. The Antarctic did not, of course, have a resident population to influence perceptions and has thus created a very different range of interests.

scholarly journals Some promising sources of expansion of the introduction potential of Prunus pumila L.

2020 ◽  
Vol 24 ◽  
pp. 00048
Author(s):  
Mikhail Lezin ◽  
Nikolai Glaz
Keyword(s):  
North America ◽  
Characteristic Feature ◽  
Snow Cover ◽  
Morphological Characters ◽  
Adaptive Potential ◽  
Fruit Crop ◽  
Regions Of Russia ◽  
Cultivation Efficiency

Prunus pumila L is an introduction species that is well cultivated in the steppe regions of Russia and is used as a rootstock for plums and apricots and less often as an independent fruit crop. The cultivation efficiency is reduced due to instability to rotting in regions with higher snow cover. The species naturally spread in North America, where it is represented by several varieties that differ in morphological characters. Representatives of var. susquehanae Willd. spread on acidic substrates and sometimes occur in wetlands and probably can increase the adaptive potential of the introduction population. According to the characteristic feature of this species is the dense short pubescence of young twigs, 2 genotypes were identified in the introduction population, probably representing descendants of var. susquehanae. These genotypes are valuable for further introduction studies in regions with problems in the cultivation of the species due to plant rotting.

The northernmost occurrence of Prognathodon (Squamata: Mosasauridae) from the Western Interior Seaway of North America

2012 ◽  
Vol 49 (9) ◽  
pp. 1111-1115 ◽  
Author(s):  
Takuya Konishi
Keyword(s):  
New Zealand ◽  
North America ◽  
Geographic Range ◽  
Polar Regions ◽  
Western Interior Seaway ◽  
Marginal Tooth ◽  
Geographic Ranges ◽  
Evolutionary Success ◽  
Marine Reptile ◽  
New Discovery

The marine reptile Prognathodon (Squamata: Mosasauridae), a mosasaurine mosasaur exhibiting a characteristically robust skull and dentition, lived during the last two ages of the Late Cretaceous. Fossilized remains of animals assigned to this genus are so far known from North America, Europe, Africa, and New Zealand, indicating their wide geographic ranges and presumed ecological and evolutionary success. Assignable to Prognathodon, a newly discovered partial marginal tooth from Dorothy, Alberta, Canada (51°15′48″N), extends the geographic range of the genus by 190 km northward in the Northern Hemisphere. Coupled with the New Zealand record of this mosasaur, the new discovery indicates that Prognathodon likely ranged anywhere from 60°N to 60°S paleolatitude, and these reptiles may even have been occasional inhabitants of the polar regions.

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