DOI: 10.1175/JCLI-D-16-0315.1
Scopus记录号: 2-s2.0-85022330807
论文题名: Twentieth-century trends in the annual cycle of temperature across the Northern Hemisphere
作者: Cornes R.C. ; Jones P.D. ; Qian C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 15 起始页码: 5755
结束页码: 5773
语种: 英语
Scopus关键词: Atmospheric temperature
; Time series
; Atmospheric variability
; Ensemble empirical mode decompositions (EEMD)
; Northern Hemispheres
; Reanalysis
; Seasonal cycle
; Surface air temperatures
; Surface observation
; Surface temperatures
; Surface properties
英文摘要: The annual cycle of surface air temperature is examined across Northern Hemisphere land areas (north of 25°N) by comparing the results from the Climatic Research Unit Time Series (CRU TS) dataset against four reanalysis datasets: two versions of the NOAA Twentieth Century Reanalysis (20CR and 20CRC) and two versions of the ECMWF Twentieth Century Reanalysis, version 2 (ERA-20C) and version 2c (ERA-20CM). The modulated annual cycle is adaptively derived from an ensemble empirical mode decomposition (EEMD) filter, and is used to define the phase and amplitude of the annual cycle. The EEMD method does not impose a simple sinusoidal shape of the annual cycle. None of the reanalysis simulations assimilates surface temperature or land-use data. However, they differ in the parameters that are included: both ERA-20C and 20CR assimilate surface pressure data; ERA-20C also includes surface wind data over the oceans; and ERA-20CM does not assimilate any of these synoptic data. It is demonstrated that synoptic variability is critical for explaining the trends and variability of the annual cycle of surface temperature across the Northern Hemisphere. The CMIP5 forcings alone are insufficient to explain the observed trends and decadal-scale variability, particularly with respect to the decline in the amplitude of the annual cycle throughout the twentieth century. The variability in the annual cycle during the latter half of the twentieth century was unusual in the context of the twentieth century, and was most likely related to large-scale atmospheric variability, although uncertainty in the results is greatest before about 1930. © 2017 American Meteorological Society. 资助项目: CAS, Chinese Academy of Sciences
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48736
Appears in Collections: 气候减缓与适应 气候变化与战略
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作者单位: Royal Netherlands Meteorological Institute (KNMI), De Bilt, Netherlands; Climatic Research Unit, University of East Anglia, Norwich, United Kingdom; Center of Excellence for Climate Change Research, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Meteorology, King Abdulaziz University, Jeddah, Saudi Arabia; Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Cornes R.C.,Jones P.D.,Qian C.. Twentieth-century trends in the annual cycle of temperature across the Northern Hemisphere[J]. Journal of Climate,2017-01-01,30(15)