Browsing by Issue Date, starting with "2012-04-14"
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- Assessment of the ensembles regional climate models in the representation of precipitation variability and extremes over PortugalPublication . Soares, Pedro Miguel Matos; Cardoso, Rita M.; Miranda, Pedro M. A.; Viterbo, Pedro; Belo-Pereira, MargaridaA new data set of daily gridded observations of precipitation, computed from over 400 stations in Portugal, is used to assess the performance of 12 regional climate models at 25 km resolution, from the ENSEMBLES set, all forced by ERA-40 boundary conditions, for the 1961-2000 period. Standard point error statistics, calculated from grid point and basin aggregated data, and precipitation related climate indices are used to analyze the performance of the different models in representing the main spatial and temporal features of the regional climate, and its extreme events. As a whole, the ENSEMBLES models are found to achieve a good representation of those features, with good spatial correlations with observations. There is a small but relevant negative bias in precipitation, especially in the driest months, leading to systematic errors in related climate indices. The underprediction of precipitation occurs in most percentiles, although this deficiency is partially corrected at the basin level. Interestingly, some of the conclusions concerning the performance of the models are different of what has been found for the contiguous territory of Spain; in particular, ENSEMBLES models appear too dry over Portugal and too wet over Spain. Finally, models behave quite differently in the simulation of some important aspects of local climate, from the mean climatology to high precipitation regimes in localized mountain ranges and in the subsequent drier regions.
- Contributions to political leadership in organizations: antecedents, consequences, mediators and moderators variablesPublication . Miranda, SandraAlthough leadership investigation has become for the last years an election topic with major relevance on organizational studies and accepting peacefully the general idea that organizations are freeland for politics and power maneuvers, knowing that decisions that came abroad from that “boiling can” are not always pursuiting the common welfare, all these acceptances run against a kind of “fear” from the academy scholars on approaching the political leaderships singularities on organizations. Indeed, when we cross over both phenomena we verify that, surprisingly, a prior investigation century left a richfull heritage of outcomes and valid conclusions, fact that has turned bigger and bigger as we watch the multiplicity of studies based under rationality standards, consented silences, the absence and weaknesses towards the unique characteristics of politic leadership on work scenarios are becoming sharped regarding to their predictors, their workers and their organizations, even if we left aside its moderator and mediator variables.