제주 고산에서 2009년 가을에 관측된 입자 생성 및 성장 현상의 특성
Characteristics of New Particle Formation and Growth Events Observed at Gosan Climate Observatory in Fall 2009
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초록
We investigated characteristics of new particle formation and growth events observed at Gosan climate observatory using Scanning Mobility Particle Sizer (SMPS) measurements of particle number size distribution with 54 size ranges from 10 to 487 nm in October 2009. Four days (17~20 October) and five days (22~26 October) were classified into strong new particle formation and growth event (N_S) and weak particle formation and growth event (N_W),respectively. N_S and N_W divided by increase of aerosol number concentration in nucleation mode and continuity of growth from nucleation to Aitken mode. Particle growth rates of N_S (5.34~9.19 nm h^(-1)) were greater than that of N_W (2.15~3.53 nm h^(-1)). N_S and N_W were analyzed with synoptic pattern over East Asia, meteorological elements, and sulfur dioxide (SO_2)measured at Gosan. We found that N_S was characterized by a fast and northwesterly wind accompanied cold and dry airmass, but N_W was affected airmass originated from South China and come through the Korea Peninsula. The events (N_S and N_W) occurred at conditions of high solar flux (> 700W m^(-2)) and low relative humidity (< 60%). The SO_2 concentration on N_S and N_W was higher than that on case of non observed new particle formation.
Abstract
We investigated characteristics of new particle formation and growth events observed at Gosan climate observatory using Scanning Mobility Particle Sizer (SMPS) measurements of particle number size distribution with 54 size ranges from 10 to 487 nm in October 2009. Four days (17~20 October) and five days (22~26 October) were classified into strong new particle formation and growth event (N_S) and weak particle formation and growth event (N_W),respectively. N_S and N_W divided by increase of aerosol number concentration in nucleation mode and continuity of growth from nucleation to Aitken mode. Particle growth rates of N_S (5.34~9.19 nm h^(-1)) were greater than that of N_W (2.15~3.53 nm h^(-1)). N_S and N_W were analyzed with synoptic pattern over East Asia, meteorological elements, and sulfur dioxide (SO_2)measured at Gosan. We found that N_S was characterized by a fast and northwesterly wind accompanied cold and dry airmass, but N_W was affected airmass originated from South China and come through the Korea Peninsula. The events (N_S and N_W) occurred at conditions of high solar flux (> 700W m^(-2)) and low relative humidity (< 60%). The SO_2 concentration on N_S and N_W was higher than that on case of non observed new particle formation.
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