We study high-resolution climate variability through the analysis of tree-rings and other palaeoclimate archives at regional to global scales. Instrumental climate data are evaluated and used for the calibration of these archives to reconstruct climate over the past couple hundred to thousand years. We teach introductory and methodological courses on climatology with emphasis on spatial patterns and long-term changes of climate and ecological variability.
An analysis of seasonal temperature differences in the three European villages Haparanda, Sweden (HAP), Geisenheim, Germany (GEI), and Cazorla, Spain (CAZ), reveals substantial urban heat island formation (ΔTurban-Trural) in all settlements. While intensities are significantly stronger during summer in Haparanda (1.4 K) and Geisenheim (1.1 K), Cazorla shows a more pronounced urban warming in the cold season (0.9 K) along with overall lower seasonal differences. Nearby rivers might substantially lower local temperatures as shown for Cazorla, but have a rather limited effect in the other two villages.
Dienst et al. (2018): Determination of the urban heat island intensity in villages and its connection to land cover in three European climate zones. Climate Research 76, 1-15.