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T. N. Krishnamurti, C. Gnanaseelan, A. K. Mishra, and A. Chakraborty

contribution to the general area of weather and climate forecasting developed at FSU; this has been discussed in a series of publications ( Krishnamurti et al. 1999 , 2000a , b , 2001 ). This technique entails the partition of a time line into two parts. One part is a “training” phase, where forecasts by a set of member models are compared to the observed or the analysis fields with the objective of developing statistics (i.e., weights a i ) on the least squares fit of the forecasts to the observations

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Arindam Chakraborty and T. N. Krishnamurti

eastern foothills of the Himalayas. The coherent temporal and geographical variations of the diurnal mode of convection, cloudiness, and circulation makes it a good test bed for the validation of numerical model forecasts ( Yang and Slingo 2001 ; Dai and Trenberth 2004 ). In this study we address the issue of modeling the diurnal mode of the Asian summer monsoon. This is a sequel to two recent papers on diurnal change of precipitation and cloudiness over the tropics ( Krishnamurti et al. 2007

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Alex C. Ruane and John O. Roads

levels (T62L28). Vertically integrated variables (e.g., precipitable water) are calculated from their comprehensive model values to prevent interpolation errors. The model output examined here covers 2002–04 and was generated as part of the Experimental Climate Prediction Center’s contribution to the Coordinated Enhanced Observing Period (CEOP; Koike 2004 ; Lawford et al. 2006 ). This time period also facilitates comparisons with the precipitation sets examined in RR07b . Augmented 6-h forecasts

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