DOI: 10.1007/s00382-015-2743-6
Scopus记录号: 2-s2.0-84938702444
论文题名: Evaluation of tropical Pacific observing systems using NCEP and GFDL ocean data assimilation systems
作者: Xue Y. ; Wen C. ; Yang X. ; Behringer D. ; Kumar A. ; Vecchi G. ; Rosati A. ; Gudgel R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 49, 期: 3 起始页码: 843
结束页码: 868
语种: 英语
英文关键词: Argo data
; ENSO monitoring and ENSO forecast
; Observing system experiment
; Ocean data assimilation systems
; TAo/TRITON data
; Tropical Pacific observing system
英文摘要: The TAO/TRITON array is the cornerstone of the tropical Pacific and ENSO observing system. Motivated by the recent rapid decline of the TAO/TRITON array, the potential utility of TAO/TRITON was assessed for ENSO monitoring and prediction. The analysis focused on the period when observations from Argo floats were also available. We coordinated observing system experiments (OSEs) using the global ocean data assimilation system (GODAS) from the National Centers for Environmental Prediction and the ensemble coupled data assimilation (ECDA) from the Geophysical Fluid Dynamics Laboratory for the period 2004–2011. Four OSE simulations were conducted with inclusion of different subsets of in situ profiles: all profiles (XBT, moorings, Argo), all except the moorings, all except the Argo and no profiles. For evaluation of the OSE simulations, we examined the mean bias, standard deviation difference, root-mean-square difference (RMSD) and anomaly correlation against observations and objective analyses. Without assimilation of in situ observations, both GODAS and ECDA had large mean biases and RMSD in all variables. Assimilation of all in situ data significantly reduced mean biases and RMSD in all variables except zonal current at the equator. For GODAS, the mooring data is critical in constraining temperature in the eastern and northwestern tropical Pacific, while for ECDA both the mooring and Argo data is needed in constraining temperature in the western tropical Pacific. The Argo data is critical in constraining temperature in off-equatorial regions for both GODAS and ECDA. For constraining salinity, sea surface height and surface current analysis, the influence of Argo data was more pronounced. In addition, the salinity data from the TRITON buoys played an important role in constraining salinity in the western Pacific. GODAS was more sensitive to withholding Argo data in off-equatorial regions than ECDA because it relied on local observations to correct model biases and there were few XBT profiles in those regions. The results suggest that multiple ocean data assimilation systems should be used to assess sensitivity of ocean analyses to changes in the distribution of ocean observations to get more robust results that can guide the design of future tropical Pacific observing systems. © 2015, Springer-Verlag Berlin Heidelberg (outside the USA). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53114
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Cimate Prediction Center, NCEP/NWS/NOAA, 5830 University Research Court, Room 3005, College Park, MD, United States; Geophysical Fluid Dynamics Laboratory, OAR/NOAA, Princeton, NJ, United States; Environmental Modeling Center, NCEP/NWS/NOAA, College Park, MD, United States; University Corporation for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Xue Y.,Wen C.,Yang X.,et al. Evaluation of tropical Pacific observing systems using NCEP and GFDL ocean data assimilation systems[J]. Climate Dynamics,2017-01-01,49(3)