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Doklady Earth Sciences - Comprehensive study of sections of mares in the Bolshaya Ussurka River basin has allowed highlighting climate changes over the past 2900 years. Reconstructions are based on...  相似文献   
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The evolution stages of the lacustrine-boggy sedimentary environments and the role of the climatic and volcanic factors were reconstructed on the basis of complex stratigraphic (botanical, palynological, and diatom analyses and tephrostratigraphy) and radiocarbon studies of the peat lands on Rasshua Island during the middle-late Holocene. The stages of the landscape evolution and the time of their reorganization were determined.  相似文献   
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The results of the complex study of a Holocene peat bog in the southern part of Ketoi Island, which is proposed to serve as a reference section for the Central Kuriles, are discussed. The peat bog’s stratigraphy is based on botanic, palynological, and diatom data, 16 radiocarbon age determinations, and the composition of the volcanic ashes. The peat accumulation initiated approximately 6500 years ago. The successive changes of the island’s vegetation are traced through the Middle-Late Holocene with defining of the phases of its development and dating the paleolandscape transformations related to the climatic oscillations and volcanic eruptions.  相似文献   
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The response of landscape biotic components of the western slope of the Sikhote-Alin Mountains (Bikin River middle flow) to the Middle–Late Holocene climate changes is discussed. The paleoreconstruction object was the Krasny Yar mari, which developed under the control of multidirectional short-term climatic changes. The last millennium was marked by particularly rapid and frequent changes in the local landscapes. The closely spaced orographic barrier strongly affected the development of biotic components and changes in the swamp hydrological regime. The moisture dynamics within the river catchment considerably controlled the development and change of the peat-forming plants. Several stages of the mari development were reconstructed; each began from the accumulation of eutrophic peat. It was followed by the transitional eutrophic–mesotrophic stage, with a higher role of atmospheric supply. The larch forests appeared in this part of the valley within the Atlantic–Subboreal cooling period. Korean pine developed in the forest vegetation in the low mountain relief at the beginning of the Subboreal and became one of the leading trees ~2.6–2.3 ka BP. The lower role of the Korean pine and birch forest expansion in the first half of the Subatlantic could be related to the fires. The broadleaf–Korean pine forests became widespread in the Medieval Warm Period. Local swamp landscapes changed dramatically in the Little Ice Age, while the slope vegetation was not subject to any major changes. The landscapes were also affected by the fires, which became more frequent. The derivative communities with birch appeared on the mari. Moreover, this part of the valley was occasionally subject to heavy flooding.  相似文献   
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