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Holocene aeolian activity in the Dinggye area (Southern Tibet, China)
Pan M. H.; Wu Y. Q.; Zheng Y. H.; Tan L. H.
Source PublicationAeolian Research
KeywordHolocene Aeolian Activity Climate Change Southern Tibet Wind Strength Ice Core Plateau Climate Sediments Temperature Record Dust Responses System
AbstractThe Dinggye area (Southern Tibet) contains numerous aeolian sediments, including modern and ancient aeolian sand deposition. In this study, we determined the chronological sequences of several profiles of Holocene paleo-aeolian deposits using Optically Stimulate Luminescence (OSL) and radiocarbon (Accelerator Mass Spectrometry (AMS) C-14 and conventional C-14) dating. Using the grain size, magnetic susceptibility, organic content and chrome characteristics of the deposits, we reconstructed the Holocene aeolian processes in the Dinggye area. The results from the paleo-aeolian depositional record indicate multiple changes in the intensity of aeolian activity and soil fixing with alternations between cool-dry and warm-humid climate conditions in the Dinggye area during the Holocene. From 12.8 ka B.P. to the present, the climate has fluctuated frequently. From 12.8 to 11.6 ka B.P. and from 9.3 to 4.9 ka B.P., the climate was warm and humid with weak aeolian activity, and a sandy paleosol developed. The peak Holocene megathermal period and the main period of pedogenesis in the study area was from 6.6 to 4.9 ka B.P. Between 11.6 and 9.3 ka B.P. and since 2.0 ka B.P., the sandlot expanded due to a cool, dry and windy climate; aeolian activity was strong and caused the development of moving dunes. The period between 4.9 and 2.0 ka B.P. was relatively cool and dry with slightly strengthened aeolian activity that developed stationary and semi-stationary dunes. In general, the Holocene events recorded by the paleo-aeolian deposits correspond well with those interpreted by other methods, such as records from ice-cores, lacustrine deposits and tree rings, but there are minor discrepancies between the methods. (C) 2013 Elsevier B.V. All rights reserved.
Indexed BySCI
Document TypeSCI/SSCI论文
Recommended Citation
GB/T 7714
Pan M. H.,Wu Y. Q.,Zheng Y. H.,et al. Holocene aeolian activity in the Dinggye area (Southern Tibet, China). 2014.
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