Charakterystyka stanów równowagi atmosfery w okresie IV-X 2002 roku dla Ursynowa-SGGW

The paper presents atmospheric stability description by the use Richardson number (Ri). The calculation was done for two types o f weather: sunny days (24h) and cloudy days (24h). In accordance with Oke (1987) stability static was divided as follows: unstable stability a-fully forced convection, b-mixed convection, c-free convection; d-neutral stability; stable stability e-fully forced convection, f-damped forced convection, g-no convection. Richardson number accomplish negative value, which stands unstable static conditions (a, b) for more cases of day-time period both sunny and cloudy days. Stable static conditions, particularly f characterized by positive value of Ri appear for cloudless nights most frequently. A large diversity of static conditions was observed for night-time period with cloudy weather. The most frequent static conditions in considered period is stable (maximum in October), then unstable (maximum in summertime months).