Ионосферные эффекты зимних стратосферных струйных течений северного полушария


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Авторы: Черниговская М.А.     Шпынев Б.Г.     Куркин В.И.     Ратовский К.Г.     Белинская А.Ю.   (ИНГГ СО РАН)   Степанов А.Е.     Бычков В.В.     Григорьева С.А.     Панченко В.А.     Коренькова Н.А.     Лещенко В.С.     Мелич Й.    
дата публикации: 2017
реферат:
This article offers a reconstruction of the vegetation and climate of the south-western Siberian Baraba forest-steppe area during the last ca. 8000 years. The analysis of palynological data from the sediment core of Lake Bolshie Toroki using quantitative methods has made it possible to reconstruct changes of the dominant types of vegetation and mean July air temperatures. Coniferous forests grew in the vicinity of the lake, and mean July air temperatures were similar to present-day ones between 7.9 and 7.0 kyr BP. The warmest and driest climate occurred at 7.0-5.0 kyr BP. At that time, the region had open steppe landscapes; birch groves began to spread. A cooling trend is seen after 5.5 kyr BP, when forest-steppe began to emerge. Steppe communities started to dominate again after 1.5 kyr BP. Mean July air temperatures lower than now are reconstructed for the period of 1.9-1 kyr BP, and then the temperatures became similar to present-day ones.
первоисточник: Распространение радиоволн: XXV Всероссийская открытая конференция, посвящ. 80-летию отечественных ионосферных исследований (г.Томск, 4-9 июля 2016 г.): Труды конференции
том:
страницы: 135-138
ISBN: 978-5-86889-734-4
ISSN:
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полный текст статьи

qusr-2017-163-152