The Behavior of Diurnal Temperature Range (DTR) and Annual Temperature Range (ATR) in the Urban Environment: A Case of Zagreb Grič, Croatia

This paper analyzed the variations of two air temperature indices, diurnal range (DTR) and annual (ATR), calculated based on observations at Zagreb Grič Observatory over a period 133 years (1887–2019). In intense climate changes strongly manifested by increased temperature, these indices were determined to significantly impact human health environment. effect is especially evident in urban areas. The located center has not changed its location during observed period. It long homogeneous series climatological observations, enabling detailed study variation city, which influenced various urbanization processes. years, both indicators showed statistically insignificant downward trend. Rescaled Adjusted Partial Sums (RAPS) method revealed significant differences DTR’s time between three sub-periods: 1887–1953, 1954–1989, 1990–2019. ATR behaved differently four 1887–1905; 1906–1926; 1927–1964; 1965–2019. analysis monthly values DTR that are highest warm part year, from May August, when they twice as high those cold November December. With an increase precipitation, decrease, while mean increases.