干旱区生态环境知识资源中心(Arid): New insights into Holocene hydrology and temperature from lipid biomarkers in western Mediterranean alpine wetlands

Arid

DOI	10.1016/j.quascirev.2020.106395
	New insights into Holocene hydrology and temperature from lipid biomarkers in western Mediterranean alpine wetlands
	Toney, Jaime L.; Garcia-Alix, Antonio; Jimenez-Moreno, Gonzalo; Anderson, R. Scott; Moossen, Heiko; Seki, Osamu
通讯作者	Garcia-Alix, A
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
出版年	2020
卷号	240
英文摘要	Alpine regions of the Mediterranean realm are among the most climatically sensitive areas in the world. Thus, alpine wetlands from the southern Iberian Peninsula, in the westernmost part of the Mediterranean region, are highly sensitive sensors of environmental changes. Difficulties have surfaced in separating controls by temperature and/or precipitation in previous paleoenvironmental studies from alpine environments in this area. We present a Holocene biomarker record (n-alkanes and long-chain diols) from a high elevation lake, Laguna de Rio Seco (LdRS), in the south of the Iberian Peninsula, which contributes to the identification of these forcing mechanisms. The hydrological history of the area, primarily water availability and evapotranspiration, is reconstructed by means of the n-alkane record, including the indices of average chain length, portion aquatic, and carbon preference index, as well as hydrogen isotopes (delta D) of aquatic (delta D-aq) and terrestrial (delta D-wax) n-alkanes. Temperatures are also estimated using the algae derived long-chain diols. We interpret delta D-aq and delta D-wax fluctuations as showing changes in the source and amount of precipitation throughout the LdRS record. An Atlantic precipitation source appears to have predominated during the early-middle Holocene, but an occasional Mediterranean influence with an isotopic enrichment in precipitation is detected in the middle-late Holocene that is likely related to the setting of the current atmospheric pattern in southeastern Iberia under the joint control of the North Atlantic Oscillation (NAO) and the Western Mediterranean dynamics, such as the Western Mediterranean Oscillation (WeMO). Our new record from LdRS is consistent with a generalized trend of a humid early-middle Holocene with low temperature variability, evolving towards an arid middle-late Holocene with abrupt temperature changes. In addition to these long-term trends during the last similar to 10,500 years, two phases of climate instability, evidenced by abrupt depletions in delta D-aq, have been identified at the end of these periods, one between similar to 6500 and 5500 cal yr BP and another in the last similar to 500 years. These episodes would represent strengthened winter cold conditions that favoured the persistence of snowpack and frozen soil in the catchment, causing reduced terrestrial plant growth and low lake evaporation. According to the long-chain diol record, temperatures during these phases were relatively low, but experienced abrupt increases at the end of each period. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Holocene n-alkanes Long-chain diols Sierra Nevada Southern Iberian Peninsula
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000546906200019
WOS关键词	NORTH-ATLANTIC OSCILLATION ; HYDROGEN-ISOTOPIC COMPOSITION ; ARCTIC SEA-ICE ; HIGH-MOUNTAIN LAKES ; CHAIN ALKYL DIOLS ; SIERRA-NEVADA ; CLIMATE-CHANGE ; MULTI-PROXY ; N-ALKANES ; PRECIPITATION
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/2XILL650/324984
作者单位	[Toney, Jaime L.; Garcia-Alix, Antonio; Moossen, Heiko] Univ Glasgow, Sch Geog & Earth Sci, Glasgow, Lanark, Scotland; [Garcia-Alix, Antonio; Jimenez-Moreno, Gonzalo] Univ Granada, Dept Stratig & Paleontol, Granada, Spain; [Garcia-Alix, Antonio] CISC UGR, Inst Andaluz Ciencias Tierra IACT, Armilla, Spain; [Anderson, R. Scott] No Arizona Univ, Sch Earth & Sustainabil, Flagstaff, AZ 86011 USA; [Seki, Osamu] Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido, Japan; [Moossen, Heiko] MaxPlanck Inst Biogeochem, Hans Knoell St 10, D-07745 Jena, Germany
推荐引用方式 GB/T 7714	Toney, Jaime L.,Garcia-Alix, Antonio,Jimenez-Moreno, Gonzalo,et al. New insights into Holocene hydrology and temperature from lipid biomarkers in western Mediterranean alpine wetlands[J],2020,240.
APA	Toney, Jaime L.,Garcia-Alix, Antonio,Jimenez-Moreno, Gonzalo,Anderson, R. Scott,Moossen, Heiko,&Seki, Osamu.(2020).New insights into Holocene hydrology and temperature from lipid biomarkers in western Mediterranean alpine wetlands.QUATERNARY SCIENCE REVIEWS,240.
MLA	Toney, Jaime L.,et al."New insights into Holocene hydrology and temperature from lipid biomarkers in western Mediterranean alpine wetlands".QUATERNARY SCIENCE REVIEWS 240(2020).