CAJ | 학술논문

于2013年1月连续在线观测天津城区气溶胶数浓度谱分布和大气能见度,并结合相关气象资料,探讨相对湿度(RH)对气溶胶浓度谱分布和大气能见度的影响.结果表明,观测期间发生了4次连续雾霾天气过程,4次雾霾天气过程对应着气溶胶粒子数浓度的连续高值,低能见度天气系高浓度气溶胶粒子和高相对湿度协同所致；随着RH增大,PN 1和PN 2.5-10呈增长趋势, RH>90%后,PN 1和PN 2.5-10有所降低,PN 1-2.5则持续增长,高RH对气粒转化和气溶胶粒子的碰并聚合作用明显；气溶胶吸湿增长因子计算表明,高RH下水汽对能见度影响很大,尤其是大雾天气下其影响甚至可能超过气溶胶粒子浓度对其的影响.
우2013년1월련속재선관측천진성구기용효수농도보분포화대기능견도,병결합상관기상자료,탐토상대습도(RH)대기용효농도보분포화대기능견도적영향.결과표명,관측기간발생료4차련속무매천기과정,4차무매천기과정대응착기용효입자수농도적련속고치,저능견도천기계고농도기용효입자화고상대습도협동소치；수착RH증대,PN 1화PN 2.5-10정증장추세, RH>90%후,PN 1화PN 2.5-10유소강저,PN 1-2.5칙지속증장,고RH대기립전화화기용효입자적팽병취합작용명현；기용효흡습증장인자계산표명,고RH하수기대능견도영향흔대,우기시대무천기하기영향심지가능초과기용효입자농도대기적영향.
Taking use of the aerosol number concentration, visibility and other observation data during January of 2013 at Tianjin, the effects of relative humidity on the aerosol size distribution and visibility were analyzed. During the observation period, there were four episodes in which the visibility was continuously less than 10km. The aerosol size distribution and relative humidity were the main factors on effecting visibility. When RH was lower than 90%, number concentration of aerosol particles increased gradually as RH increased. When RH was higher than 90%, number concentration of aerosol particles between 1μm and 2.5μm in diameter increased gradually as RH increased, while number concentration of aerosol particles less than 1μm and between 2.5μm and 10μm in diameter decreased gradually as RH increased. The mean value of aerosol hygroscopic growth factors at 80%RH [f (RH=80%)] was 2.04. Water vapor had a great influence on the visibility with high RH in fog and may even exceed the influence of aerosol particle concentration on visibility.