DOI: 10.1002/joc.5563
论文题名: Skill of the two 20th century reanalyses in representing Antarctic near-surface air temperature
作者: Zhang Y. ; Wang Y. ; Huai B. ; Ding M. ; Sun W.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 11 起始页码: 4225
结束页码: 4238
语种: 英语
英文关键词: 20CR and ERA-20CR
; Antarctic ice sheet
; near-surface air temperature
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Glaciers
; Ice
; Surface waters
; Temperature measurement
; Annual mean temperatures
; Antarctic ice sheets
; East antarctic ice sheets
; Near surface air temperature
; Sea surface temperature (SST)
; Southern latitudes
; Temperature observations
; Temperature reconstruction
; Oceanography
; air temperature
; climate change
; ice sheet
; surface temperature
; twentieth century
; Antarctic Ice Sheet
; Antarctica
; East Antarctic Ice Sheet
; East Antarctica
英文摘要: The performance of the 20th century reanalysis (20CR) and of the pilot reanalysis of the 20th century (ERA-20C) for Antarctic near-surface air temperature is investigated based on quality-controlled monthly temperature measurements with a time coverage of at least 15 years from 42 automatic and manual weather stations, and temperature reconstructions. On the inter-annual timescale, ERA-20C and 20CR agree well with the temperature observations since 1957/1958, but there are systematic biases relative to absolute values with cold bias at East Antarctic coastal stations, and warm bias over the inland stations. An abrupt upwards shift in Antarctic annual and seasonal (except summer) mean temperature averaged over the East Antarctic ice sheet and the Antarctic ice sheet occurs around 1950 in 20CR and around 1979 in ERA-20C, which is probably related to the increasing counts of assimilated observations. Moreover, the significantly negative trends of seasonal and annual mean temperature in 20CR since the late 1970s are found to be largely spurious, which most likely results from the poor representation of variability in sea surface temperature (SST) around Antarctica in the 20CR's boundary forcing. These results imply and urge that caution must be taken when applying the two global reanalyses for evaluating long-term climate changes at high southern latitudes. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116806
Appears in Collections: 气候减缓与适应
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作者单位: College of Geography and Environment, Shandong Normal University, Jinan, China; Institute of Climate System, Chinese Academy of Meteorological Sciences, Beijing, China
Recommended Citation:
Zhang Y.,Wang Y.,Huai B.,et al. Skill of the two 20th century reanalyses in representing Antarctic near-surface air temperature[J]. International Journal of Climatology,2018-01-01,38(11)