Speleothem records decadal to multidecadal hydroclimate variations in southwestern Morocco during the last millennium

被引：32

作者：

Ait Brahim, Yassine ^{[1
]}

Cheng, Hai ^{[2
]}

Sifeddine, Abdelfettah ^{[3
,4
,5
]}

Wassenburg, Jasper A. ^{[6
,7
]}

Cruz, Francisco W. ^{[8
]}

Khodri, Myriam ^{[3
,4
]}

Sha, Lijuan ^{[2
]}

Perez-Zanon, Nuria ^{[9
]}

Beraaouz, El Hassane ^{[1
]}

Apaestegui, James ^{[10
]}

Guyot, Jean-Loup ^{[11
]}

Jochum, Klaus Peter ^{[7
]}

Bouchaou, Lhoussaine ^{[1
]}

机构：

[1] Ibn Zohr Univ, Appl Geol & Geoenvironm Lab, Agadir, Morocco

[2] Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China

[3] Sorbonne Univ, IRD, Ctr IRD, UPMC,CNRS,MNHN,UMR LOCEAN, Bondy, France

[4] UPMC, Depto Geoq, LMI PALEOTRACES, IRD,UFF,UANTOF,UPCH, Niteroi, RJ, Brazil

[5] Univ Fed Fluminense, Dept Geoquim, Niteroi, RJ, Brazil

[6] Johannes Gutenberg Univ Mainz, Inst Geosci, Mainz, Germany

[7] Max Planck Inst Chem, Climate Geochem Dept, Mainz, Germany

[8] Univ Sao Paulo, Inst Geociencias, Sao Paulo, SP, Brazil

[9] Univ Rovira & Virgili, Climate Change Ctr C3, Campus Terres Ebre,Avda Remolins 13-15, Tortosa, Spain

[10] IGP, Ate Vitarte, Peru

[11] UPS, CNRS, IRD, GET,UMR5563, F-31400 Toulouse, France

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2017年 / 476卷

关键词：

speleothem; southwestern Morocco; last millennium; hydroclimate changes; Atlantic Oscillation; Sahara Low; NORTH-ATLANTIC OSCILLATION; TRACE-ELEMENT ANALYSIS; CLIMATE VARIABILITY; ISOTOPE COMPOSITION; ICE-AGE; PRECIPITATION; OXYGEN; CAVE; CIRCULATION; PROFILES;

D O I：

10.1016/j.epsl.2017.07.045

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

This study presents the first well-dated high resolution stable isotope (delta O-18 and delta C-13) and trace element (Mg and Sr) speleothem records from southwestern Morocco covering the last 1000 yrs. Our records reveal substantial decadal to multidecadal swings between dry and humid periods, consistent with regional paleorecords with prevailing dry conditions during the Medieval Climate Anomaly (MCA), wetter conditions during the second part of the Little Ice Age (LIA), and a trend towards dry conditions during the current warm period. These coherent regional climate signals suggest common climate controls. Statistical analyses indicate that the climate of southwestern Morocco remained under the combined influence of both the North Atlantic Oscillation (NAO) and the Atlantic Multidecadal Oscillation (AMO) over the last millennium. Interestingly, the generally warmer MCA and colder LIA at longer multidecadal timescales probably influenced the regional climate in North Africa through the influence on Sahara Low which weakened and strengthened the mean moisture inflow from the Atlantic Ocean during the MCA and LIA respectively. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1 / 10

页数：10

共 66 条

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