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

on the use of diverse physical parameterization within a suite of multimodels was reported in Krishnamurti et al. (2008) . Here several planetary boundary layer algorithms constituted the difference among the member models of a multimodel suite. The goal of this study was to examine the possible improvements in the planetary boundary layer fluxes of latent heat that can be achieved from our approach. This study requires an observational benchmark for the latent heat fluxes. Those were obtained

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Arindam Chakraborty and T. N. Krishnamurti

1. Introduction The diurnal cycle contributes to a large modulation of the time-mean energy budget of the earth–atmosphere system. Bergman and Salby (1997) , from radiative transfer calculations, showed that large errors can occur in the estimation of TOA (a list of acronyms is provided in Table 1 ) shortwave (∼20 W m −2 ) and longwave fluxes (∼5 W m −2 ) if the diurnal cycle is not taken into account. Chakraborty et al. (2007) showed that improvements in the diurnal cycle of low, middle

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