Positive Air ion variation during evening period (18:00-20:00 hours) at rural station Ramanandnagar (17° 4' N 74° 25' E) India

摘要

Ion-induced nucleation is a special case of heterogeneous nucleation. In ion-induced nucleation the vapors condense around an ion. Since the energy barrier for ion-induced nucleation is lower than for the homogeneous type, nucleation should always occur via ions if they are present. In January average positive air ions were 11 × 10~2 ions per cm~3, starts decreasing and reaches to minimum (1.8 × 10~2 ions per cm~3) in April. From May starts increasing and reaches to 9.9 × 10~2 ions per cm~3 in June. In July positive air ions again decreases to 1.9×10~2 ions per cm~3. Average positive air ions were 8.4 in August starts decreasing and reaches minimum (2.1×10~2 ions per cm~3) in October. From the October again starts increasing and reaches maximum (7.6×10~2 ions per cm~3) in December.