DOI: 10.1175/JCLI-D-14-00356.1
Scopus记录号: 2-s2.0-84947650389
论文题名: A Comparative study of wave forcing derived from the ERA-40 and ERA-Interim reanalysis datasets
作者: Lu H. ; Bracegirdle T.J. ; Phillips T. ; Turner J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 6 起始页码: 2291
结束页码: 2311
语种: 英语
Scopus关键词: Atmospherics
; Climate models
; Climatology
; Dynamics
; Waves
; Advanced microwave sounding units
; Comparative studies
; High resolution infrared radiation sounders
; Interannual variability
; Reanalysis
; Residual circulations
; Stratospheric circulations
; Trends
; Infrared radiation
; annual variation
; atmospheric circulation
; atmospheric dynamics
; comparative study
; heat flux
; mesoscale meteorology
; spatial resolution
; stratosphere
; wave force
英文摘要: The Eliassen-Palm (E-P) flux divergences derived from ERA-40 and ERA-Interim show significant differences during northern winter. The discrepancies are marked by vertically alternating positive and negative anomalies at high latitudes and are manifested via a difference in the climatology. The magnitude of the discrepancies can be greater than the interannual variability in certain regions. These wave forcing discrepancies are only partially linked to differences in the residual circulation but they are evidently related to the static stability in the affected regions. Thus, the main cause of the discrepancies is most likely an imbalance of radiative heating. Two significant sudden changes are detected in the differences between the eddy heat fluxes derived from the two reanalyses. One of the changes may be linked to the bias corrections applied to the infrared radiances from the NOAA-12 High-Resolution Infrared Radiation Sounder in ERA-40, which is known to be contaminated by volcanic aerosol from the 1991 eruption of Mt. Pinatubo. The other change may be due in part to the use of uncorrected radiances from the NOAA-15 Advanced Microwave Sounding Units by ERA-Interim since 1998. These sudden changes have the potential to alter the wave forcing trends in the affected reanalysis, suggesting that extreme care is needed when one comes to extract trends from the highly derived wave forcing quantities. © 2015 American Meteorological Society. 资助项目: NERC, Natural Environment Research Council
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50722
Appears in Collections: 气候变化事实与影响
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作者单位: British Antarctic Survey, Cambridge, United Kingdom
Recommended Citation:
Lu H.,Bracegirdle T.J.,Phillips T.,et al. A Comparative study of wave forcing derived from the ERA-40 and ERA-Interim reanalysis datasets[J]. Journal of Climate,2015-01-01,28(6)