气候变化领域集成服务门户(CCPortal): Aeolian sand accumulation and land desertification over the past 1,500 years as revealed by two aeolian dunes in the Beiluhe Basin on interior Qinghai-Tibet Plateau, SW China

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DOI	10.1016/j.quaint.2021.11.013
	Aeolian sand accumulation and land desertification over the past 1,500 years as revealed by two aeolian dunes in the Beiluhe Basin on interior Qinghai-Tibet Plateau, SW China
	Wang, Luyang; Wu, Qingbai; Fu, Ziteng; Jiang, Guanli; Liu, Yali; Xu, Kunming
通讯作者	Wu, QB (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2022
ISSN	1040-6182
EISSN	1873-4553
起始页码	101
结束页码	117
卷号	613
英文摘要	As an important region of desertification in China, the Qinghai-Tibetan Plateau (QTP) has attracted great attention. However, the study of land desertification history at the millennia-scale on the interior plateau is grossly inadequate. In a severely and rapidly desertifying area in the Beiluhe Basin on the interior QTP, grain-size distributions, sand particle morphologies, and 7 available optically stimulated luminescence (OSL) ages of sand sediment from two fixed aeolian dunes were obtained by several laboratory tests. Combining these results with plateau paleoclimate and contemporary aeolian sand activities in several adjacent regions, two phases of evident enhanced aeolian sand accumulation corresponding to desert expansion over the past 1500 years in the study region were identified. The first enhanced phase (850-700 a B.P.) might have been closely related to suitable trapping of denser vegetation cover and degradation of permafrost on the QTP as a consequence of warm and wet climates. Reactivation of local older sediments caused by cold and dry climates might have been responsible for the second enhanced phase (1400-1200 a B.P.). Permafrost plays an important role in aeolian sand accumulation and desertification on the QTP. However, expansion (or degradation) of permafrost has not always prevented (or promoted) aeolian desertification development on the QTP since the Last Glaciation Maximum (LGM, 21-14-12 ka B.P.). The effects of permafrost on aeolian desertification are governed by numerous factors such as preceding and current climate conditions, locations of permafrost and aeolian sand activity, and trap conditions due to vegetation and topography.
关键词	PERMAFROST DEGRADATION CLIMATE-CHANGE ANNUAL PRECIPITATION LATE PLEISTOCENE OSL CHRONOLOGY QUARTZ GRAINS GONGHE BASIN QAIDAM BASIN CENTRAL-ASIA LAKE AREA
英文关键词	Aeolian sediment; Optically stimulated luminescence; Scanning electron microscope test; Grain size analysis; Paleoenvironment
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000740437300001
来源期刊	QUATERNARY INTERNATIONAL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253635
作者单位	[Wang, Luyang; Wu, Qingbai; Fu, Ziteng; Jiang, Guanli; Liu, Yali; Xu, Kunming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Wang, Luyang; Wu, Qingbai; Fu, Ziteng; Liu, Yali; Xu, Kunming] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [Wang, Luyang; Wu, Qingbai; Jiang, Guanli] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat Stn Frozen Soil Environm & Engn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wang, Luyang,Wu, Qingbai,Fu, Ziteng,et al. Aeolian sand accumulation and land desertification over the past 1,500 years as revealed by two aeolian dunes in the Beiluhe Basin on interior Qinghai-Tibet Plateau, SW China[J]. 中国科学院西北生态环境资源研究院,2022,613.
APA	Wang, Luyang,Wu, Qingbai,Fu, Ziteng,Jiang, Guanli,Liu, Yali,&Xu, Kunming.(2022).Aeolian sand accumulation and land desertification over the past 1,500 years as revealed by two aeolian dunes in the Beiluhe Basin on interior Qinghai-Tibet Plateau, SW China.QUATERNARY INTERNATIONAL,613.
MLA	Wang, Luyang,et al."Aeolian sand accumulation and land desertification over the past 1,500 years as revealed by two aeolian dunes in the Beiluhe Basin on interior Qinghai-Tibet Plateau, SW China".QUATERNARY INTERNATIONAL 613(2022).