DOI: 10.1016/j.quascirev.2017.07.018
论文题名: Holocene temperature evolution in the Northern Hemisphere high latitudes – Model-data comparisons
作者: Zhang Y. ; Renssen H. ; Seppä H. ; Valdes P.J.
刊名: Quaternary Science Reviews
出版年: 2017
卷: 173 起始页码: 101
结束页码: 113
语种: 英语
英文关键词: Continental biotic proxies
; Europe
; Fennoscandia
; Greenland
; Holocene
; Ice cores
; N America
; Paleoclimate modeling
; Paleoclimatology
; Russia
Scopus关键词: Soil moisture
; Continental biotic proxies
; Europe
; Fennoscandia
; Greenland
; Holocenes
; Ice core
; Paleoclimates
; Paleoclimatology
; Russia
; Geochronology
; Chironomidae
英文摘要: Heterogeneous Holocene climate evolutions in the Northern Hemisphere high latitudes are primarily determined by orbital-scale insolation variations and melting ice sheets. Previous inter-model comparisons have revealed that multi-simulation consistencies vary spatially. We, therefore, compared multiple model results with proxy-based reconstructions in Fennoscandia, Greenland, north Canada, Alaska and Siberia. Our model-data comparisons reveal that data and models generally agree in Fennoscandia, Greenland and Canada, with the early-Holocene warming and subsequent gradual decrease to 0 ka BP (hereinafter referred as ka). In Fennoscandia, simulations and pollen data suggest a 2 °C warming by 8 ka, but this is less expressed in chironomid data. In Canada, a strong early-Holocene warming is suggested by both the simulations and pollen results. In Greenland, the magnitude of early-Holocene warming ranges from 6 °C in simulations to 8 °C in δ18O-based temperatures. Simulated and reconstructed temperatures are mismatched in Alaska. Pollen data suggest strong early-Holocene warming, while the simulations indicate constant Holocene cooling, and chironomid data show a stable trend. Meanwhile, a high frequency of Alaskan peatland initiation before 9 ka can reflect a either high temperature, high soil moisture or large seasonality. In high-latitude Siberia, although simulations and proxy data depict high Holocene temperatures, these signals are noisy owing to a large spread in the simulations and between pollen and chironomid results. On the whole, the Holocene climate evolutions in most regions (Fennoscandia, Greenland and Canada) are well established and understood, but important questions regarding the Holocene temperature trend and mechanisms remain for Alaska and Siberia. © 2017 Elsevier Ltd 资助项目: Zhang, Y.
; Department of Geosciences and Geography, University of Helsinki, P.O.BOX 64, Finland
; 电子邮件: yurui.zhang@helsinki.fi
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59104
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geosciences and Geography, University of Helsinki, P.O.BOX 64, Helsinki, Finland; Department of Earth Sciences, VU University Amsterdam, De Boelelaan 1085, Amsterdam, Netherlands; Department of Natural Sciences and Environmental Health, University College of Southeast Norway, Bø i Telemark, Norway; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom
Recommended Citation:
Zhang Y.,Renssen H.,Seppä H.,et al. Holocene temperature evolution in the Northern Hemisphere high latitudes – Model-data comparisons[J]. Quaternary Science Reviews,2017-01-01,173