Abstract
Urbanization and other changes in land use have an impact on surface-air temperatures. Kalnay and Cai1 report that the observed surface-temperature trend in part of the United States exceeds the trend in the NCEP/NCAR 50-year reanalysis (NNR) and conclude that changes in land use account for the difference (0.035 °C per decade according to their corrected values). Although land-use change may explain some of this discrepancy, the authors do not quantify the impact of the many changes in observational practice that occurred during the analysis period. Our findings indicate that these 'non-climatic' changes have a systematic effect that overwhelms the reported difference in trends and therefore calls Kalnay and Cai's central conclusion into question.
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Vose, R., Karl, T., Easterling, D. et al. Impact of land-use change on climate. Nature 427, 213–214 (2004). https://doi.org/10.1038/427213b
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DOI: https://doi.org/10.1038/427213b
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