Grusha and 12 for Akkol) were used to reconstruct the vegetational history since the last glaciation. The core from Grusha contains about 50 cm of Late Glacial sediment of relatively low organic content, mostly correlated with the Younger Dryas episode because Palaeogeography, Palaeoclimatology, Pal...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.538.1461 2023-05-15T18:40:37+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.538.1461 http://www.botany.unibe.ch/paleo/publications/reprints/PaleogeogrPaleocl_245_518.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.538.1461 http://www.botany.unibe.ch/paleo/publications/reprints/PaleogeogrPaleocl_245_518.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.botany.unibe.ch/paleo/publications/reprints/PaleogeogrPaleocl_245_518.pdf text ftciteseerx 2016-01-08T10:54:29Z Grusha and 12 for Akkol) were used to reconstruct the vegetational history since the last glaciation. The core from Grusha contains about 50 cm of Late Glacial sediment of relatively low organic content, mostly correlated with the Younger Dryas episode because Palaeogeography, Palaeoclimatology, Palaeoecology 245 (2007) 518–534 www.elsevier.com/locate/palaeo⁎of the high percentages of Artemisia, Gramineae, and Chenopodiaceae, along with a diversity of non-arboreal pollen types indicating tundra–steppe and meadow-steppe. In the earliest Holocene, starting with increased organic matter at about 195 cm (12,000 cal. yr BP), the Artemisia–Gramineae–Chenopodiaceae pollen assemblage continued, along with an increase in shrub Betula but without the diversity of minor non-arboreal types. The interpretation of dry and warm climate at this time is supported by the unconformity at Akkol, implying a dried lake. Then after about 1000 years the increase of Pinus sibirica, P. sylvestris, Picea obovata, and Abies sibirica suggests that forests developed in response to increased humidity, first at the higher-elevation Grusha, and then at Akkol. After about 6000 cal. yr BP the role of forests decreased sharply in the area. The Picea and Abies components almost disappeared, as they did also in more westerly areas of the Altai Mountains. Steppe elements increased along with alpine herbs, especially after 2000 cal. yr BP as a result of cooling or increased aridity, as well as probable human activity. Correlation of the vegetation sequence for the Tuva sites with those to the west in the central Altai Mountains indicates that the Late Glacial open landscapes persisted in the earliest Holocene but then were invaded by coniferous forests as a result of increased moisture and temperature associated with Atlantic storm systems as well as with insolation-enhanced Asian monsoon. Cooling and Text Tundra Unknown Tuva ENVELOPE(12.506,12.506,65.215,65.215) |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Grusha and 12 for Akkol) were used to reconstruct the vegetational history since the last glaciation. The core from Grusha contains about 50 cm of Late Glacial sediment of relatively low organic content, mostly correlated with the Younger Dryas episode because Palaeogeography, Palaeoclimatology, Palaeoecology 245 (2007) 518–534 www.elsevier.com/locate/palaeo⁎of the high percentages of Artemisia, Gramineae, and Chenopodiaceae, along with a diversity of non-arboreal pollen types indicating tundra–steppe and meadow-steppe. In the earliest Holocene, starting with increased organic matter at about 195 cm (12,000 cal. yr BP), the Artemisia–Gramineae–Chenopodiaceae pollen assemblage continued, along with an increase in shrub Betula but without the diversity of minor non-arboreal types. The interpretation of dry and warm climate at this time is supported by the unconformity at Akkol, implying a dried lake. Then after about 1000 years the increase of Pinus sibirica, P. sylvestris, Picea obovata, and Abies sibirica suggests that forests developed in response to increased humidity, first at the higher-elevation Grusha, and then at Akkol. After about 6000 cal. yr BP the role of forests decreased sharply in the area. The Picea and Abies components almost disappeared, as they did also in more westerly areas of the Altai Mountains. Steppe elements increased along with alpine herbs, especially after 2000 cal. yr BP as a result of cooling or increased aridity, as well as probable human activity. Correlation of the vegetation sequence for the Tuva sites with those to the west in the central Altai Mountains indicates that the Late Glacial open landscapes persisted in the earliest Holocene but then were invaded by coniferous forests as a result of increased moisture and temperature associated with Atlantic storm systems as well as with insolation-enhanced Asian monsoon. Cooling and |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.538.1461 http://www.botany.unibe.ch/paleo/publications/reprints/PaleogeogrPaleocl_245_518.pdf |
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ENVELOPE(12.506,12.506,65.215,65.215) |
geographic |
Tuva |
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Tuva |
genre |
Tundra |
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Tundra |
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http://www.botany.unibe.ch/paleo/publications/reprints/PaleogeogrPaleocl_245_518.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.538.1461 http://www.botany.unibe.ch/paleo/publications/reprints/PaleogeogrPaleocl_245_518.pdf |
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1766230015375048704 |