干旱区生态环境知识资源中心(Arid): Responses of Sediment Properties to Paleoclimatic Changes since the Holocene in Ancient Milan River Channel, Northwest China

Arid

DOI	10.15244/pjoes/136182
	Responses of Sediment Properties to Paleoclimatic Changes since the Holocene in Ancient Milan River Channel, Northwest China
	Wang, HuiLing; Kasim, Tursun; Aili, Aishajiang
通讯作者	Aili, ASJ (corresponding author)，Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China.
来源期刊	POLISH JOURNAL OF ENVIRONMENTAL STUDIES
ISSN	1230-1485
EISSN	2083-5906
出版年	2021
卷号	30 期号:6
英文摘要	In this paper, the sediment grain size, organic matter C/N ratio, and isotope delta C-13 of the ancient Milan River channel, Northwest China are used as indicators, and their responses to paleoclimatic changes since the Holocene were analyzed. The results show that the dominant grain size of the surface sediments of the ancient Milan River channel is silt, and the soil particle size is smaller than that of the floodplain, indicating that the hydrodynamics were weak in the late paleochannel. The surface sediments of the paleochannel contain a wind created layer of sand, indicating that the sedimentary environment was affected by a two-phase function of wind and water. The C/N ratio of the sediments varies from 5 to 19.6 with an average value of 12.3. The delta C-13 values range from -27.383 parts per thousand to 21.58 parts per thousand, indicating that the organic matter in the sediment was dominated by river organic matter but mixed with some terrestrial organic matter. The dates of the Optically Stimulated Luminescence (OSL) and the variation in the measured values of each element in the vertical section indicate that since 5000 aBP, the paleoclimate in the study area has experienced six stages of evolution. In stage I, 5000-4500 aBP, the climate was mainly warm and dry. During this period, the climate environment fluctuated frequently, and the cold and warm periods alternated. During stage II, 4500-3900 aBP, the climate gradually decreased and then rebounded slightly. The overall climate was cold and humid, and the water volume increased significantly during this period. During stage III, 3900-2800 aBP, the climate experienced a large temperature increase and cooling, and a warm front appeared around 3000 aBP, indicating typical warm and dry climate characteristics during this period. In stage IV, 2800-1800 aBP, the temperature continued to decrease, and the climate became cold and humid, which was conducive to the growth of crops. In stage V, the first half of the period from 1800 to 1000 aBP was relatively warm and dry, and the temperature dropped briefly causing a cold period. In stage VI, 1000 aBP to present, the temperature experienced a small fluctuation, the climate became dry and cold, and the climate and environmental characteristics have entered a relatively warm and dry period. This study helps us to understand the land degradation and desertification processes in arid area.
英文关键词	Paleoclimate ancient river channel sediments organic matter isotope Milan River
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000760618000034
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375984
作者单位	[Wang, HuiLing; Kasim, Tursun] Xinjiang Univ, Coll Resources & Environm Sci, Urumqi 830046, Peoples R China; [Aili, Aishajiang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Wang, HuiLing,Kasim, Tursun,Aili, Aishajiang. Responses of Sediment Properties to Paleoclimatic Changes since the Holocene in Ancient Milan River Channel, Northwest China[J],2021,30(6).
APA	Wang, HuiLing,Kasim, Tursun,&Aili, Aishajiang.(2021).Responses of Sediment Properties to Paleoclimatic Changes since the Holocene in Ancient Milan River Channel, Northwest China.POLISH JOURNAL OF ENVIRONMENTAL STUDIES,30(6).
MLA	Wang, HuiLing,et al."Responses of Sediment Properties to Paleoclimatic Changes since the Holocene in Ancient Milan River Channel, Northwest China".POLISH JOURNAL OF ENVIRONMENTAL STUDIES 30.6(2021).