Sedimentary response of lake El Tobar, Spain, to climate: lake level changes after the Maunder Minimum

被引:5
|
作者
Lopez-Blanco, Charo [1 ,2 ,3 ]
Andrews, Julian [4 ]
Dennis, Paul [4 ]
Rosa Miracle, Maria [1 ]
Vicente, Eduardo [1 ]
机构
[1] Univ Valencia, Dept Microbiol & Ecol, Dr Moliner 50, E-46100 Burjassot, Spain
[2] Escuela Politec Nacl, Fac Ingn Civil & Ambiental, Ladron de Guevara E11-253, Quito 170517, Ecuador
[3] Inst Nacl Invest Geol Minero Met INIGEMM, Malvas E15-142, De Los Perales, Quito, Ecuador
[4] Univ East Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England
关键词
Iberian Range; lake level changes; Little Ice Age; plant macrofossils; stable isotopes; CENTRAL IBERIAN RANGE; LAND-USE CHANGE; LAST MILLENNIUM; TARAVILLA LAKE; RECONSTRUCTION; PRECIPITATION; PENINSULA; HOLOCENE; RECORD; VARIABILITY;
D O I
10.1002/jqs.2915
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Lake level reconstructions from a littoral core in lake El Tobar, Spain, are presented for the last 350 years. These are based on plant macrofossils and stable isotopes from lacustrine carbonates. Our data suggest five episodes of advance and regression of the shoreline coupled with changes in water retention in the lake. A low lake level and high water renewal episode at ca. AD 1650-1715 is indicated by oxidized facies with abundant remains from terrestrial/marsh plant macrofossils and low delta O-18 and delta C-13 values. A fluctuating lake level episode at ca. AD 1715-1772 during changing climatic conditions in the Little Ice Age (LIA) caused periods of erosion and sediment deposition that intermittently blocked the lake outlet, resulting in more positive delta O-18 and delta C-13 values. The lake became progressively more closed with increased level in the wet years at the end of the LIA (ca. AD 1772-1850). During the Dalton Minimum, delta C-13 values reached a minimum, indicating low productivity, but increased after this with development of submerged Chara. From ca. AD 1850 to 1960 lake levels were high but are marked by changes in marsh communities, mainly the shift from Juncus to Typha (ca. AD 1850-1960) predominance, which indicates low and high levels, respectively. Copyright (C) 2016 John Wiley & Sons, Ltd.
引用
收藏
页码:905 / 918
页数:14
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