Extreme temperature days for the period from 1947 to 1998 in Hong Kong were investigated, to examine the variability of the extreme days, and to relate extreme days to synoptic influences. Significant decreasing trends of both warm and cold days
were discovered. Results of this study create a climatology of extreme temperature days in Hong Kong.
An analysis of tornado days in Missouri for the period 1950-2002
Tornado analysis using a tornado-day approach was made for the State of Missouri, and its climatic divisions, for the period 1950-2002. Although tornado days have not increased in Missouri, the NW Prairie climatic division recorded a statistically
significant decline in tornado days during that time period. Seasonal patterns in tornado days were examined for each of the 115 countries in Missouri using cluster analysis.
This paper looks at trends in selected types of meteotropic situation in Kraków during the period 1901-2010. The situations taken into account included the number of frosty days (tmax30°C), hot nights (tmin>20°C), days
with a daily amplitude of air temperature greater than 12°C (tmax-tmin>12°C), days with a more than 6°C change in air temperature from the previous day (Δtśr>6°C) and days with insolation deficit (no direct sunlight). The trends found by the study concerned
decreases in the number of frosty days (tmax6°C). The 110 year period was characterised by a decrease in the number of days
Sea-level adjusted daily values for atmospheric pressure and the major day-to-day changes in pressure were used to identify within Poland two zones differing more markedly in the burden the pressure changes identified impose on the human organism
during the cool half-year lasting from October to March inclusive. The overall trend is for areas further to the north in Poland to be associated with both more frequent instances of >8 hPa day-to-day changes and changes of greater magnitude, in winter
particularly. This season is more likely to be characterised by large falls in pressure from day to day, than by large rises, with these even exceeding 35 hPa on occasion. Overall, while the south of Poland records day-to-day changes in pressure of >8 hPa
on less than 23% of days in the cool half-year, the north experiences such changes on more than 25% of all days. – (BJ)
Study of the number of days with snowfall, recorded between 1883 and 1981 in Nancy: 1. Monthly frequential analysis| 2. Multiple linear regression to explain the frequency of snowfalls or the number of days with steady snowcover, based
on the monthly average minimal and maximal temperatures, the precipations and the number of rainy days.
The diurnal, seasonal and annual patterns of hail days are examined. Hail day frequency appears to be inversely related to rainfall periodicity in the main summer rainfall region. - (AJC)
The A. approaches unusual atmospheric phenomena by studying the fractal dimensional resolution of measuring networks and the intermittency of the day to day temperature fluctuations.