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anna trevisan

present position

Researcher

Dirigente di Ricerca (ISAC-CNR) Bologna Italy

education

1970	Laurea in Fisica, University of Bologna

professional positions

2004-	Italian representative THORPEX European Regional Committee
1989-97	Head of DINAMICA ATMOSFERICA, FISBAT-CNR
1978-79	Research Assistant, Dept. of Meteorology, MIT
1976-77	Guest Investigator: Empirical Studies Project, NCAR
1973-91	Researcher, FISBAT-CNR
1970-72	Researcher, ISDGM-CNR
1970	Research Fellow, University of Blindern

research interests

Predictability, Data Assimilation, Atmospheric and Climate Dynamics, Numerical Atmospheric and Oceanic Modeling.

selected journal publications

• Anna Trevisan, Luigi Palatella, 2011: On the Kalman Filter error covariance collapse into the unstable subspace.
  Nonlin. Proc. Geophys. 18, 243-250
  (pdf)
• Anna Trevisan, Massimo D'Isidoro and Olivier Talagrand, 2010: Four-dimensional variational assimilation in the unstable subspace (4DVar-AUS) and the optimal subspace dimension.
  Quart. J. Roy. Meteor. Soc. 136, 487-496 (pdf)
• Alberto Carrassi , Anna Trevisan , Laurent Descamps , Olivier Talagrand , and Francesco Uboldi: Controlling instabilities along a 3DVar analysis cycle by assimilating in the unstable subspace: a comparison with the EnKF
  Nonlin. Proc. Geophys. 15, 503-521
  (pdf)
• A. Carrassi, M. Ghil, A. Trevisan and F. Uboldi, 2008: Data assimilation as a nonlinear dynamical systems problem: Stability and convergence of the prediction-assimilation system.
  Chaos (Vol.18, Issue 2) DOI: 10.1063/1.2909862
  (pdf)(© Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.)
  AIP's official online version of the abstract
• Carrassi A., A. Trevisan and F. Uboldi, 2007: Adaptive observation and assimilation in the unstable subspace by breeding on the data assimilation system. Tellus, 59A-1, 101-113.
pdf The authors are thankful to Tellus, The Swedish Geophysical Society and Blackwell Publishing.
• Uboldi, F., A. Trevisan, 2006: Detecting unstable structures and controlling error growth by assimilation of standard and adaptive observations in a primitive equation ocean model. Nonlin. Proc. Geophys., 16, 67-81.
pdf (© Copyright 2006 Author(s). This work is licensed under a Creative Commons License)
• Uboldi, F., A. Trevisan and A. Carrassi, 2005: Developing a dynamically based assimilation method for targeted and standard observations. Nonlin. Proc. Geophys., 12, 149-156.

pdf (© Copyright 2005 Author(s). This work is licensed under a Creative Commons License )
• Trevisan A., and F. Uboldi, 2004: Assimilation of standard and targeted observations within the unstable subspace of the observation-analysis-forecast cycle. J. Atmos. Sci., 61, 103-113i
  pdf (© Copyright 2004 American Meteorological Society)
• Trevisan, A., F. Pancotti and F. Molteni, 2001: Ensemble prediction in a model with flow regimes. Quart. J. Roy. Meteor. Soc., 127, 343-358.
  pdf
• Trevisan, A., and F. Pancotti, 1998: Periodic orbits, Lyapunov vectors and singular vectors in the Lorenz system. J. Atmos Sci., 55, 390-398.
  Article (pdf) - (© Copyright 1998 American Meteorological Society)
• Trevisan, A.,1995: Statistical properties of atmospheric analogs and the existence of multiple flow regimes. J. Atmos. Sci., 52, 3577-3592.
  Article (pdf) - (© Copyright 1995 American Meteorological Society)
• Trevisan, A. and R. Legnani, 1995: Transient error growth and local predictability: a study in the Lorenz system. Tellus A. 47, 103-117.
  Article (pdf)
• Trevisan, A., 1993: Impact of transient error growth on global average predictability measures. J. Atmos. Sci., 50, 1016-1028.
  pdf
• Trevisan, A., P. Malguzzi and M. Fantini, 1992: On Lorenz’s law for the growth of large and small errors in the atmosphere. J. Atmos. Sci., 49, 713-719.
• Trevisan, A. and U. Giostra, 1990: Dynamical criteria determining lee cyclogenesis. J. Atmos. Sci., 47, 2400-2406.
• Malguzzi, P., A. Trevisan and A. Speranza, 1990: Statistics and predictability for an intermediate dimensionality model of the baroclinic jet. Ann. Geoph., 8, 29-36.
• Buzzi, A., P. Malguzzi and A. Trevisan, 1990: The statistical properties of the interaction of high-frequency Eddies with mountains in a two-layer model. Tellus A, 42, 28-40.
• Trevisan, A., L. Ferranti and P. Malguzzi, 1988: Further developments of normal mode theory of lee cyclogenesis: isentropic coordinate model. J. Atmos. Sci., 45, 3880-3888
• Malguzzi, P., A. Trevisan and A. Speranza, 1987: Effects of finite height topography on nongeostrophic baroclinic instability: implications to theories of lee cyclogenesis. J. Atmos. Sci, 44, 1475-1482.
• Rambaldi, S. and A. Trevisan, 1986: Restrictions and alternative formulation of the quasi-geostrophic barotropic Channel model. J. Atmos. Sci. Notes and Correspondence, 43, 107-108.
• Speranza, A., A. Buzzi, A. Trevisan and P. Malguzzi, 1985: A theory of deep cyclogenesis in the lee of the Alps: modifications of baroclinic instability by localized topography. J. Atmos. Sci., 42, 1521-1535.
• Newton, C.W. and A. Trevisan, 1984: Clinogenesis and frontogenesis on jet-stream waves. Part II: Channel model numerical experiments. J. Atmos. Sci., 41, 2736-2755.
• Newton, C.W. and A. Trevisan, 1984: Clinogenesis and frontogenesis on jet-stream waves. Part I: Analytical relations to wave structure. J. Atmos. Sci., 41, 2718-2734.
• Buzzi, A., A. Trevisan and A. Speranza, 1984: Instabilities of a baroclinic flow related to topographic forcing. J. Atmos. Sci., 41, 637-650.
• Tosi, E., M. Fantini and A. Trevisan, 1983: Numerical experiments on orographic cyclogenesis: relationship between the development of the lee cyclone and the basic flow characteristics. Mon. Wea. Rev., 111, 799-814.
• Buzzi, A., A. Trevisan and G. Salustri, 1981: Internal frontogenesis: a two-dimensional model in isentropic, semi-geostrophic coordinates. Mon. Wea. Rev., 109, 1053-1060.
• Trevisan, A. and A. Buzzi, 1980: Stationary response of barotropic weakly non-linear Rossby waves to quasi-resonant orographic forcing. J. Atmos. Sci., 37, 947-957.
• Trevisan, A., 1976: Numerical experiments on the influence of orography on cyclone formation with an isentropic primitive equation model. J. Atmos. Sci., 33, 768-780.
  

recent conference proceedings and posters

• Talagrand O. et al. 2010: Predictability and assimilation of observations in chaotic systems. Workshop: "Exploring Complex Dynamics in High-Dimensional Chaotic Systems: From Weather Forecasting to Oceanic Flows", Max-Planck-Institut für Physik komplexer Systeme - Dresden, Germany - 25-29 January 2010
  Oral Presentation (pdf)
• Trevisan A. and L. Palatella, 2010: The Extended Kalman Filter and its Reduction to the Unstable Subspace. Workshop: "Exploring Complex Dynamics in High-Dimensional Chaotic Systems: From Weather Forecasting to Oceanic Flows", Max-Planck-Institut für Physik komplexer Systeme - Dresden, Germany - 25-29 January 2010
  Poster (pdf)
  
• Uboldi F. et al. 2010: Inspecting the trajectory instabilities of a convection-resolving model. Workshop: "Exploring Complex Dynamics in High-Dimensional Chaotic Systems: From Weather Forecasting to Oceanic Flows", Max-Planck-Institut für Physik komplexer Systeme - Dresden, Germany - 25-29 January 2010
  poster (pdf)
• Ghil M. et al. 2009: Data Assimilation in Meteorology, Oceanography, Space Physics and Elsewhere. Lyapunov analysis, from theory to geophysical applications Institut des Systèmes Complexes - Paris Ile-de-France 26-28 October 2009
  Oral Presentation (pdf)
  
• Trevisan A., M. D'Isidoro and O. Talagrand, 2009: On the existence of an optimal subspace dimension for 4-dimensional variational assimilation. Lyapunov analysis, from theory to geophysical applications Institut des Systèmes Complexes - Paris Ile-de-France 26-28 October 2009
  Oral Presentation (pdf)
  
• Trevisan A., M. D'Isidoro and O. Talagrand, 2009: On the existence of an optimal subspace dimension for 4-dimensional variational assimilation. The 5th WMO Symposium on Data Assimilation, Melbourne, Australia, 5-9 October 2009
  extended abstract (pdf) - Oral Presentation (pdf)
  
• Carrassi, A., A. Trevisan, L. Descamps, O. Talagrand and F. Uboldi, 2007: Controlling the instabilities along a 3DVar analysis cycle by assimilating in the unstable subspace: a comparison with an EnKF. EGU 2007, Wien (Osterich).
  Oral Presentation (pdf)
• Trevisan, A., F. Uboldi and *A. Carrassi*, 2007: L'assimilazione dati come problema di dinamica nonlineare. Convegno Nazionale della Terra Fluida e problematiche affini. Ischia (Italy).
  Oral Presentation (pdf)
• Second THORPEX International Science Symposium 2006, 04 - 08 December, Landshut (Germany): Prospects of forecast improvements by assimilation in the unstable subspace.
  (Trevisan, Carrassi, Uboldi)
  Poster (pdf) - extended abstract (pdf)
• EGU 2006, 02 - 07 April, Wien (Osterich): Reduction of the unstable subspace dimension by observational forcing in a data-assimilation system.
  (Carrassi, Trevisan, Uboldi)
  Oral Presentation (pdf)
• EGU 2005, 24 - 29 April, Wien (Osterich): Developing of a dynamically consistent targeting and assimilation method.
  (Carrassi, Trevisan, Uboldi)
  Poster (ppt)
• WMO 4^th International Symposium on Data Assimilation of Observations in Meteorology and Oceanography, 18 - 22 April 2005, Prague (Czech Republic): Developing of a dynamically consistent targeting and assimilation method.
  (Uboldi, Trevisan, Carrassi)
  Poster (pdf)
• First THORPEX International Science Symposium, 6 - 10 December 2004, Montreal (Canada): Targeting and Assimilation: a dynamically consistent approach.
  (Uboldi, Carrassi, Trevisan)
  Poster (ppt) - Extended abstract (doc)
• EGU 2004, 25 - 30 April, Nice (France): Developing a dynamically based assimilation method for targeted and standard observations.
  (Uboldi, Trevisan, Carrassi)
  Talk (pdf)
• Roger Daley Memorial Symposium, 28 Sept. - 01 Oct. 2003, Montreal (Quebec) Canada: Development of a dynamically based assimilation method. (Alberto Carrassi - Anna Trevisan - Francesco Uboldi)
  Poster