DOI: 10.1175/JCLI-D-11-00326.1
Scopus记录号: 2-s2.0-84874889659
论文题名: Last millennium climate and its variability in CCSM4
作者: Landrum L. ; Otto-Bliesner B.L. ; Wahl E.R. ; Conley A. ; Lawrence P.J. ; Rosenbloom N. ; Teng H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 4 起始页码: 1085
结束页码: 1111
语种: 英语
Scopus关键词: Atlantic multidecadal oscillations
; Community climate system model
; Eastern pacific Ocean
; Medieval Climate Anomaly (MCA)
; North Atlantic oscillations
; Pacific decadal oscillation
; Polar amplifications
; Proxy reconstruction
; Atmospheric pressure
; Atmospheric temperature
; Computer simulation
; Sea ice
; Volcanoes
; Climate models
; Atlantic Multidecadal Oscillation
; climate variation
; cooling
; El Nino-Southern Oscillation
; Little Ice Age
; Medieval Warm Period
; North Atlantic Oscillation
; Northern Hemisphere
; Pacific Decadal Oscillation
; proxy climate record
; Southern Hemisphere
; surface temperature
; Europe
; Pacific Ocean
; Pacific Ocean (East)
; United States
英文摘要: An overview of a simulation referred to as the "Last Millennium" (LM) simulation of the Community Climate System Model, version 4 (CCSM4), is presented. The CCSM4LMsimulation reproduces many largescale climate patterns suggested by historical and proxy-data records, with Northern Hemisphere (NH) and Southern Hemisphere (SH) surface temperatures cooling to the early 1800s Common Era by ;0.5°C (NH) and ;0.3°C (SH), followed by warming to the present. High latitudes of both hemispheres show polar amplification of the cooling from the Medieval Climate Anomaly (MCA) to the Little Ice Age (LIA) associated with sea ice increases. The LM simulation does not reproduce La Niñ a-like cooling in the eastern Pacific Ocean during the MCA relative to the LIA, as has been suggested by proxy reconstructions. Still, dry medieval conditions over the southwestern and central United States are simulated in agreement with proxy indicators for these regions. Strong global cooling is associated with large volcanic eruptions, with indications of multidecadal colder climate in response to larger eruptions. The CCSM4's response to large volcanic eruptions captures some reconstructed patterns of temperature changes over Europe and North America, but not those of precipitation in the Asian monsoon region. The Atlantic multidecadal oscillation (AMO) has higher variance at centennial periods in theLMsimulation compared to the 1850 nontransient run, suggesting a long-term Atlantic Ocean response to natural forcings. The North Atlantic Oscillation (NAO), Pacific decadal oscillation (PDO), and El Niñ o-Southern Oscillation (ENSO) variability modes show little or no change. CCSM4 does not simulate a persistent positive NAO or a prolonged period of negative PDO during the MCA, as suggested by some proxy reconstructions. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52013
Appears in Collections: 气候变化事实与影响
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作者单位: National Center for Atmospheric Research, Boulder, CO, United States; Paleoclimatology Branch, National Climatic Data Center, Boulder, CO, United States
Recommended Citation:
Landrum L.,Otto-Bliesner B.L.,Wahl E.R.,et al. Last millennium climate and its variability in CCSM4[J]. Journal of Climate,2013-01-01,26(4)