干旱区生态环境知识资源中心(Arid): Late-Holocene climatic record from a glacial lake in Ladakh range, Trans-Himalaya, India

Arid

DOI	10.1177/0959683620908660
	Late-Holocene climatic record from a glacial lake in Ladakh range, Trans-Himalaya, India
	Phartiyal, Binita; Singh, Randheer; Joshi, Priyanka; Nag, Debarati
通讯作者	Phartiyal, Binita
来源期刊	HOLOCENE
ISSN	0959-6836
EISSN	1477-0911
出版年	2020
卷号	30 期号:7 页码:1029-1042
英文摘要	A multi-proxy study using mineral magnetism, sediment texture, total organic content, palynofacies and diatoms was conducted in one of the highest proglacial lake situated at North Pulu (5098 m a.s.l.) of Ladakh sector of NW Himalaya - a high-altitude cold arid desert. This study presents climatic variations that occurred between 5412 and 419 cal. yr BP (C-14 AMS chronology). Directly recharged by meltwater from Khardung glacier, this proglacial lake provides a complete record of past climatic variability due to continuous sedimentation and this attribute makes it an exceptionally important geochronological archive for climatic studies. This first high-resolution palaeolimnology record from Karakoram Himalayas shows intermittent warm and cold periods in which the cold events are short but sudden events recorded at 5700, 4600, 4400, 4200, 3800, 3500, 3000, 1800-1700, 1200, 910, 840 and 770-710 cal. yr BP. Between 5412 and 4840 cal. yr BP, an oxic lake condition existed with freeze-thaw action, prominent weathering, more sediment generation and less organic productivity. The following period till 4410 cal. yr BP was cold and dry, a transition phase to the next warmer phase. Between 4410 and 2064 cal. yr BP, climate ameliorated to somewhat moderate warm climate and relatively high lake levels. Glacial melting due to a warm climate resulted in high TOC%, and well-preserved OM indicating reducing conditions in the lake system. From 2064 to 1711 cal. yr BP cold conditions and from 1272 to 1182 cal. yr BP warmer conditions are seen with large appearance in Amphora ovalis indicating increased nutrients input and moderate water levels. This was followed by warmer climatic conditions between 1182 and 958 cal. yr BP. LIA in the region is experienced between 958 and 644 cal. yr BP with anoxic condition. Between 644 and 419 cal. yr BP, climatic condition was again warmer comparatively. However, this warming was not so severe and only had a regional impact.
英文关键词	Ladakh multi-proxy palaeoclimate proglacial lake Tibetan Plateau
类型	Article
语种	英语
国家	India
收录类别	SCI-E
WOS记录号	WOS:000523771700001
WOS关键词	EQUILIBRIUM-LINE ALTITUDES ; QINGHAI-TIBETAN PLATEAU ; ASIAN SUMMER MONSOON ; BASIN WESTERN TIBET ; HIGH-RESOLUTION ; ENVIRONMENTAL-CHANGES ; LONAR LAKE ; CO BASIN ; SEDIMENTS IMPLICATIONS ; LACUSTRINE RECORD
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314663
作者单位	Birbal Sahni Inst Palaeosci, 53 Univ Rd, Lucknow, Uttar Pradesh, India
推荐引用方式 GB/T 7714	Phartiyal, Binita,Singh, Randheer,Joshi, Priyanka,et al. Late-Holocene climatic record from a glacial lake in Ladakh range, Trans-Himalaya, India[J],2020,30(7):1029-1042.
APA	Phartiyal, Binita,Singh, Randheer,Joshi, Priyanka,&Nag, Debarati.(2020).Late-Holocene climatic record from a glacial lake in Ladakh range, Trans-Himalaya, India.HOLOCENE,30(7),1029-1042.
MLA	Phartiyal, Binita,et al."Late-Holocene climatic record from a glacial lake in Ladakh range, Trans-Himalaya, India".HOLOCENE 30.7(2020):1029-1042.