We explain panel and multivariate regressions for comparing trends in climate data sets. They impose minimal restrictions on the covariance matrix and can embed multiple linear comparisons, which is a convenience in applied work. We present applications comparing post-1979 modeled and observed temperature trends in the tropical lowerand midtroposphere. Results are sensitive to the sample length...

This paper looks at the level of persistence in temperature anomalies series 114 European cities. Once this has been identified, time trend coefficients are estimated and results indicate that most examined display positive trends, supporting thus climate warming. Moreover, obtained confirm hypothesis long-memory behaviour cannot be neglected study series, changing, therefore, effect global

Although recent global warming trends in air temperature are not as pronounced as those observed only one decade ago, global mean temperature is still at a very high level. Does plant phenology - which is believed to be a suitable indicator of climate change - respond in a similar way, that is, does it still mirror recent temperature variations? We explored in detail long-term flowering onset d...