大气科学进展（英文版）
大氣科學進展（英文版）
대기과학진전（영문판）
ADVANCES IN ATMOSPHERIC SCIENCES
2010年
4期
947-956
,共10页
刘新罡%张远航%温梦婷%王京丽%Jinsang JUNG%张士煜%胡敏%曾立民%Young Joon KIM
劉新罡%張遠航%溫夢婷%王京麗%Jinsang JUNG%張士煜%鬍敏%曾立民%Young Joon KIM
류신강%장원항%온몽정%왕경려%Jinsang JUNG%장사욱%호민%증립민%Young Joon KIM
气溶胶散射%珠江三角洲%生长因子%运动%吸湿%热力学计算%化学成分%关闭
氣溶膠散射%珠江三角洲%生長因子%運動%吸濕%熱力學計算%化學成分%關閉
기용효산사%주강삼각주%생장인자%운동%흡습%열역학계산%화학성분%관폐
atmospheric aerosol%hygroscopic growth factor%closure experiment%Pearl River Delta campaign
Measurements of aerosol physical, chemical and optical parameters were carried out in Guangzhou, China from 1 July to 31 July 2006 during the Pearl River Delta Campaign. The dry aerosol scattering coefficient was measured using an integrating nephelometer and the aerosol scattering coefficient for wet conditions was determined by subtracting the sum of the aerosol absorption coefficient, gas scattering coefficient and gas absorption coefficient from the atmospheric extinction coefficient. Following this, the aerosol hygroscopic growth factor, f（RH）, was calculated as the ratio of wet and dry aerosol scattering coefficients. Measurements of size-resolved chemical composition, relative humidity （RH）, and published functional relationships between particle chemical composition and water uptake were likewise used to find the aerosol scattering coe？cients in wet and dry conditions using Mie theory for internally- or externally-mixed particle species [（NH_4）_2SO_4, NH_4NO_3, NaCl, POM, EC and residue]. Closure was obtained by comparing the measured f（RH） values from the nephelometer and other in situ optical instruments with those computed from chemical composition and thermodynamics. Results show that the model can represent the observed f（RH） and is appropriate for use as a component in other higher-order models.
