globalchange  > 全球变化的国际研究计划
DOI: 10.1016/j.gloplacha.2019.06.002
WOS记录号: WOS:000478709700006
论文题名:
Early Pliocene climatic optimum, cooling and early glaciation deduced by terrestrial and marine environmental changes in SW Spain
作者: Jimenez-Moreno, Gonzalo1; Perez-Asensio, Jose N.2; Larrasoana, Juan C.3,4; Sierro, Francisco J.5; Garcia-Castellanos, Daniel4; Salazar, Angel6; Maria Salvany, Josep7; Ledesma, Santiago8; Pilar Mata, M.6; Mediavilla, Carlos9
通讯作者: Jimenez-Moreno, Gonzalo
刊名: GLOBAL AND PLANETARY CHANGE
ISSN: 0921-8181
EISSN: 1872-6364
出版年: 2019
卷: 180, 页码:89-99
语种: 英语
英文关键词: Pollen analysis ; Vegetation ; Benthic foraminifera ; Climate change ; Early Pliocene ; SW Spain
WOS关键词: GUADALQUIVIR FORELAND BASIN ; NORTH-BETIC STRAIT ; LATE MIOCENE ; SEA-LEVEL ; BENTHIC FORAMINIFERA ; POLLEN RECORD ; ATLANTIC ; VEGETATION ; EVOLUTION ; EVENTS
WOS学科分类: Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向: Physical Geography ; Geology
英文摘要:

The Pliocene is a key period in Earth's climate evolution, as it records the transition from warm and stable conditions to the colder and more variable glaciated climate of the Pleistocene. Simultaneously, climate became more seasonal in the Mediterranean area, and Mediterranean-type seasonal precipitation rhythm with summer drought established. These climatic changes presumably had significant impacts on terrestrial environments. However, the response of terrestrial environments to such climate changes is still not fully understood due to the lack of detailed studies dealing with this period of time. In this study, multiproxy analyses of continuous core sampling from La Matilla (SW Spain) shows detailed and continuous record of pollen, sand content and abundance of benthic foraminifer Bolivina spathulata to describe paleoenvironmental and paleoclimate trends during the early Pliocene. This record shows warmest, most humid climate conditions and highest riverine nutrient supply at similar to 4.35 Ma, coinciding with the Pliocene climatic optimum and high global sea level. A climate cooling and aridity trend occurred subsequently and a significant glaciation occurred at similar to 4.1-4.0 Ma, during a period known by very little terrestrial evidence of glaciation. Our multiproxy data thus indicate that terrestrial and marine environments were significantly variable during the early Pliocene and that major glaciation-like cooling occurred before the intensification of northern hemisphere glaciation at the beginning of the Pleistocene (similar to 2.7 Ma). This major climate cooling and aridity maxima between 4.1 and 4.0 Ma is independently validated by a coeval sea-level drop (third order Za2 sequence boundary). This sea level drawdown is supported by enhanced coarse sedimentation and minima in riverine nutrient supply, showing paired vegetation and sea-level changes and thus a strong land-ocean relationship. This study also shows that long-term climatic trends were interrupted by orbital-scale cyclic climatic variability, with eccentricity, obliquity and precession acting as the main triggers controlling climate and environmental change in the area.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/146113
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作者单位: 1.Univ Granada, Dept Estratig & Paleontol, Granada 18002, Spain
2.Univ Barcelona, GRC Geociencies Marines, Dept Dinam Terra & Ocea, E-08028 Barcelona, Spain
3.Inst Geol & Minero Espana, Unidad Zaragoza, Zaragoza 50006, Spain
4.CSIC, Inst Earth Sci Jaume Almera, E-08028 Barcelona, Spain
5.Univ Salamanca, Dept Geol, E-37008 Salamanca, Spain
6.Inst Geol & Minero Espana, Madrid 28760, Spain
7.Univ Politecn Cataluna, Dept Engn Civil & Ambiental, ES-08034 Barcelona, Spain
8.Naturgy Energy Grp SA, Madrid 28033, Spain
9.Inst Geol & Minero Espana, Seville 41013, Spain

Recommended Citation:
Jimenez-Moreno, Gonzalo,Perez-Asensio, Jose N.,Larrasoana, Juan C.,et al. Early Pliocene climatic optimum, cooling and early glaciation deduced by terrestrial and marine environmental changes in SW Spain[J]. GLOBAL AND PLANETARY CHANGE,2019-01-01,180:89-99
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