Poster Session 1 | 
|   | Data Assimilation and Impact Studies | 
|   | Chair: Shirley T. Murillo, NOAA/AOML/HRD, Miami, FL 
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 |   | P1.1 | Comparison of retrospective optimal interpolation with existing retrospective analysis methods and strategies for its implementation    Hyo-Jong Song, Seoul National University, Seoul, 				, South Korea; and G. H. Lim, D. Lee, and H. S. Lee | 
 |   | P1.2 | Ensemble/Variational Observation (EnVO): a rigorous approach to adaptive observation built on the framework of EnVE    David Zhang, University of California, La Jolla, CA; and R. Krohn and T. Bewley | 
 |   | P1.3 | Verification of the boundary layer properties over heterogeneous surfaces in the coupled Advanced Research Weather Research and Forecasting/National Centers for Environmental Prediction – Oregon State University – Air Force – Hydrologic Research Lab (WRF/Noah) model    Miliaritiana L. Robjhon, Howard University, Washington, DC; and E. Joseph, J. D. Fuentes, and C. A. Stearns | 
 |   | P1.4 | Data assimilation in a simulated coupled ocean-atmosphere system    Tamara D. Singleton, University of Maryland, College Park, College Park, MD; and E. Kalnay, S. C. Yang, and J. Ballabrera | 
 |   | P1.5 | DART: A community facility for ensemble data assimilation    Jeffrey Anderson, NCAR, Boulder, CO; and T. Hoar, N. Collins, K. Raeder, and H. Liu | 
 |   | P1.6 | Observation Error Modeling and EnKF OSSEs Examining the Impact of Spatial and Temporal Resolutions and Errors of Phased-Array Radar     Yasuko Umemoto, University of Oklahoma, Norman, OK; and T. Lei, T. Y. Yu, and M. Xue | 
 |   | P1.7 | Adjoint Sensitivity Analysis of the Peruvian Current System    Aneesh Subramanian, SIO/Univ. Of California, La Jolla, CA; and A. J. Miller and B. Cornuelle | 
 |   | P1.8 | Monitoring and Assimilation Impact Study of Moisture Data from Aircraft at the Canadian Meteorological Center     Iriola Mati, Canadian Meteorological Centre, Dorval, PQ, Canada; and R. Sarrazin, Y. Zaitseva, and G. Verner |