Comments on ''A Cautionary Note on the Interpretation of EOFs''

The misleading aspect of the statistical analyses used in Dommenget and Latif, which raises concerns on some of the reported climate modes, is demonstrated. Adopting simple statistical techniques, the physical existence of the Indian Ocean dipole mode is shown and then the limitations of varimax and regression analyses in capturing the climate mode are discussed.

[1]  M. Latif,et al.  The coupled GCM ECHO-2. Part II: Indian Ocean response to ENSO , 2000 .

[2]  M. Richman,et al.  Rotation of principal components , 1986 .

[3]  J. Wallace,et al.  On the structure and evolution of ENSO‐related climate variability in the tropical Pacific: Lessons from TOGA , 1998 .

[4]  Ian T. Jolliffe,et al.  A Cautionary Note on Artificial Examples of EOFs , 2003 .

[5]  B. Goswami,et al.  A dipole mode in the tropical Indian Ocean , 1999, Nature.

[6]  P. Vinayachandran,et al.  Indian Ocean dipole mode events in an ocean general circulation model , 2002 .

[7]  N. Saji,et al.  Response of the equatorial Indian Ocean to an unusual wind event during 1994 , 1999 .

[8]  D. Cadet.  The southern oscillation over the indian ocean , 1985 .

[9]  Ian T. Jolliffe,et al.  Rotation of principal components: Some comments , 1987 .

[10]  Ian T. Jolliffe,et al.  Rotation of ill-defined principal components , 1989 .

[11]  G. Meyers,et al.  Interannual upper ocean variability in the tropical Indian Ocean , 2001 .

[12]  Antonio J. Busalacchi,et al.  Oceanic processes associated with anomalous events in the Indian Ocean with relevance to 1997–1998 , 2000 .

[13]  Wojtek J. Krzanowski,et al.  Sensitivity of Principal Components , 1984 .

[14]  I. Jolliffe.  Principal Component Analysis , 2002 .

[15]  Alberto M. Mestas-Nuñez,et al.  Orthogonality properties of rotated empirical modes , 2000 .

[16]  Y. Masumoto,et al.  Interannual subsurface variability in the tropical Indian Ocean with a special emphasis on the Indian Ocean Dipole , 2002 .

[17]  T. Yamagata,et al.  The Indian Ocean SST dipole simulated in a coupled general circulation model , 2000 .

[18]  T. Yamagata,et al.  Why were cool SST anomalies absent in the Bay of Bengal during the 1997 Indian Ocean Dipole Event? , 2002 .

[19]  kwang-yul kim,et al.  A Comparison Study of EOF Techniques: Analysis of Nonstationary Data with Periodic Statistics , 1999 .

[20]  Peter J. Webster,et al.  Coupled ocean–atmosphere dynamics in the Indian Ocean during 1997–98 , 1999, Nature.

[21]  M. Latif,et al.  A Cautionary Note on the Interpretation of EOFs , 2002 .

[22]  Ngar-Cheung Lau,et al.  Remote Sea Surface Temperature Variations during ENSO: Evidence for a Tropical Atmospheric Bridge , 1999 .

[23]  Michaf. L. B. Richman.  Rotation of principal components: a reply , 1987 .

[24]  T. Yamagata,et al.  Unusual ocean‐atmosphere conditions in the tropical Indian Ocean during 1994 , 1999 .

[25]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[26]  James A. Carton,et al.  A Simple Ocean Data Assimilation Analysis of the Global Upper Ocean 1950–95. Part I: Methodology , 2000 .

[27]  kwang-yul kim,et al.  EOF-Based Linear Prediction Algorithm: Examples , 1999 .