Figure 1From: Possible effects of changes in the meteorological state over semi-arid areas on the general well-being of weather-sensitive patients Wind direction (wind rose) during the year (2001) on 7:00 (a) and 20:00 (b) local time. In Figures 2, 3 and 4 wind direction WD presented in polar coordinates was measured hourly clockwise from the North; radius-vector of every dot equals wind speed WS (m·s-1) at the same hour.Back to article page