DOI: 10.1016/j.quascirev.2017.05.020
Scopus记录号: 2-s2.0-85020418094
论文题名: (MIS3 & 2) millennial oscillations in Greenland dust and Eurasian aeolian records – A paleosol perspective
作者: Rousseau D.-D. ; Boers N. ; Sima A. ; Svensson A. ; Bigler M. ; Lagroix F. ; Taylor S. ; Antoine P.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 169 起始页码: 99
结束页码: 113
语种: 英语
Scopus关键词: Atmospheric temperature
; Climate change
; Dust
; Abrupt climate change
; Environmental implications
; Greenland Ice Sheet
; Northern Hemispheres
; Substantial reorganization
; Temperature increase
; Temporal resolution
; Transition duration
; Ice
; algorithm
; climate variation
; concentration (composition)
; dust
; eolian deposit
; interstadial
; Last Glacial
; Northern Hemisphere
; paleosol
; temporal record
; Arctic
; Europe
; Greenland
; Greenland Ice Sheet
英文摘要: Since their discovery, the abrupt climate changes that punctuated the last glacial period (∼110.6–14.62 ka) have attracted considerable attention. Originating in the North-Atlantic area, these abrupt changes have been recorded in ice, marine and terrestrial records all over the world, but especially in the Northern Hemisphere, with various environmental implications. Ice-core records of unprecedented temporal resolution from northern Greenland allow to specify the timing of these abrupt changes, which are associated with sudden temperature increases in Greenland over a few decades, very precisely. The continental records have, so far, been mainly interpreted in terms of temperature, precipitation or vegetation changes between the relatively warm “Greenland Interstadials” (GI) and the cooler “Greenland Stadials” (GS). Here we compare records from Greenland ice and northwestern European eolian deposits in order to establish a link between GI and the soil development in European mid-latitudes, as recorded in loess sequences. For the different types of observed paleosols, we use the correlation with the Greenland records to propose estimates of the maximum time lapses needed to achieve the different degrees of maturation and development. To identify these time lapses more precisely, we compare two independent ice-core records: δ18O and dust concentration, indicating variations of atmospheric temperature and dustiness in the Greenland area, respectively. Our method slightly differs from the definition of a GI event duration applied in other studies, where the sharp end of the δ18O decrease alone defines the end of a GI. We apply the same methodology to both records (i.e., the GIs are defined to last from the beginning of the abrupt δ18O increase or dust concentration decrease until the time when δ18O or dust recur to their initial value before the GI onset), determined both visually and algorithmically, and compare them to published estimates of GI timing and duration. The duration of the GI and consequently the maximum time for paleosol development varies between 200 and 4200 years when visually determined and between 200 and 4800 years when estimated algorithmically for GI 17 to 2, i.e. an interval running from 60 ka to 23 ka b2k (age before 2000 AD). Furthermore, we investigate the abruptness of the transition from stadial to interstadial conditions, which initiates the paleosol development. The average transition duration is 55.4 ± 16.1 (56.8 ± 19.6) years when determined visually, and 36.4 ± 13.4 (60.00 ± 21.2) years when determined algorithmically for the δ18O (dust concentration). The δ18O increases correspond to a mean temperature difference of 11.8 °C on the top of the Greenland ice sheet, associated with substantial reorganizations of the ecosystems in mid-latitude Europe. © 2017 Elsevier Ltd 资助项目: NGRIP is directed and organized by the Ice and Climate research group, Niels Bohr Institute, University of Copenhagen. It is supported by funding agencies in Denmark (FNU), Belgium (FNRS-CFB), France (IPEV and INSU,CNRS), Germany (AWI), Iceland (RANNIS), Japan (MEXT), Sweden (SPRS), Switzerland (SNF) and the USA (NSF, Office of Polar Programs).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59173
Appears in Collections: 过去全球变化的重建
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作者单位: Ecole Normale Supérieure, UMR CNRS 8539, Laboratoire de Météorologie Dynamique, CERES-ERTI, 24 rue Lhomond Cedex 5, Paris, France; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Centre for Ice and Climate Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen OE, Denmark; University of Bern, Physics Institute, Climate and Environment Physics, Sidlerstrasse 5Bern, Switzerland; Institut de Physique du Globe, UMR CNRS 7154, 1 rue Jussieu, Paris, France; CNRS, Laboratoire de Géographie Physique: Environnements Quaternaires et Actuels, UMR CNRS 8591, 1 Place Aristide Briand, Meudon, France
Recommended Citation:
Rousseau D.-D.,Boers N.,Sima A.,et al. (MIS3 & 2) millennial oscillations in Greenland dust and Eurasian aeolian records – A paleosol perspective[J]. Quaternary Science Reviews,2017-01-01,169