DOI: 10.1007/s00382-014-2267-5
Scopus记录号: 2-s2.0-85027926942
论文题名: A twentieth-century reanalysis forced ocean model to reconstruct the North Atlantic climate variation during the 1920s
作者: Müller W.A. ; Matei D. ; Bersch M. ; Jungclaus J.H. ; Haak H. ; Lohmann K. ; Compo G.P. ; Sardeshmukh P.D. ; Marotzke J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-07-08 起始页码: 1935
结束页码: 1955
语种: 英语
英文关键词: Climate variability
; North Atlantic 1920s warming
; Ocean state reconstruction
英文摘要: The observed North Atlantic multi-decadal variability for the period 1872–2009 is reconstructed with the Max Planck Institute ocean model, which is forced with an ensemble of the atmospheric twentieth century reanalysis. Special emphasis is put on the early part of the experiments, which includes a prominent climate variation during the 1920s. The experiments are in agreement with selected hydrographic records, indicating a transition from cold and fresh North Atlantic water properties, prior to the 1920 climate variation, towards warm and saline waters afterwards. Examining the variation reveals that sea level pressure (SLP) anomalies prior to the 1900s resemble a negative phase of North Atlantic Oscillation and associated weak winds result in a weak North Atlantic Current (NAC) and sub-polar gyre (SPG). This leads to a reduced transport of warm and saline waters into the higher latitudes. Simultaneously, Arctic freshwater release results in the accumulation of cold and fresh water properties, which cover the upper layers in the Labrador Sea and subsequently suppress convection. From the 1910s, the Arctic freshwater export is reduced, and, NAC and SPG are strengthened as a result of an increased SLP gradient over the North Atlantic. Concurrently, Labrador Sea convection and Atlantic meridional overturning circulation (AMOC) increase. The intensified NAC, SPG, and AMOC redistribute sub-tropical water into the North Atlantic and Nordic Seas, thereby increasing observed and modelled temperature and salinity during the 1920s. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54193
Appears in Collections: 过去全球变化的重建
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作者单位: Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, Germany; University of Hamburg, Hamburg, Germany; University of Colorado, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States; Physical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Müller W.A.,Matei D.,Bersch M.,et al. A twentieth-century reanalysis forced ocean model to reconstruct the North Atlantic climate variation during the 1920s[J]. Climate Dynamics,2015-01-01,44(2017-07-08)