Deliquescent phenomena of ambient aerosols on the North China Plain

In this study, we report that the deliquescent phenomena of ambient aerosols on the North China Plain are frequently observed using a humidified nephelometer system. The deliquescence relative humidity (RH) primarily ranges from 73% to 81%, with an average of 76.8%. The observed deliquescent phenomena of ambient aerosols exhibit distinct diurnal patterns and are highly correlated with ammonium sulfate. The diurnal variations of ammonium and nitrate may play significant roles on occurrences of observed deliquescent phenomena. The frequently observed deliquescent phenomena of ambient aerosols in this paper imply that current parameterization schemes that describe the RH dependence of particle light scattering may result in a significant bias when estimating aerosol effects on climate.

[1]  D. Worsnop,et al.  Partitioning of HNO3 and particulate nitrate over Tokyo: Effect of vertical mixing , 2006 .

[2]  Y. H. Zhang,et al.  Highly time-resolved chemical characterization of atmospheric submicron particles during 2008 Beijing Olympic Games using an Aerodyne High-Resolution Aerosol Mass Spectrometer , 2010 .

[3]  L. Alados-Arboledas,et al.  Aerosol light-scattering enhancement due to water uptake during the TCAP campaign , 2014 .

[4]  Martin Gysel,et al.  Effects of relative humidity on aerosol light scattering in the Arctic , 2010 .

[5]  A. Virtanen,et al.  Phase State and Deliquescence Hysteresis of Ammonium-Sulfate-Seeded Secondary Organic Aerosol , 2015 .

[6]  J. Santarpia,et al.  Direct measurement of the hydration state of ambient aerosol populations , 2004 .

[7]  S. Martin,et al.  Phase changes of ambient particles in the Southern Great Plains of Oklahoma , 2008 .

[8]  Peter V. Hobbs,et al.  Humidification factors for atmospheric aerosols off the mid‐Atlantic coast of the United States , 1999 .

[9]  Mark J. Rood,et al.  Mixtures of pollution, dust, sea salt, and volcanic aerosol during ACE‐Asia: Radiative properties as a function of relative humidity , 2003 .

[10]  P. Yan,et al.  Observational study of influence of aerosol hygroscopic growth on scattering coefficient over rural area near Beijing mega-city , 2009 .

[11]  S. Martin,et al.  Secondary Organic Material Produced by the Dark Ozonolysis of α-Pinene Minimally Affects the Deliquescence and Efflorescence of Ammonium Sulfate , 2011 .

[12]  Sonia M. Kreidenweis,et al.  Hygroscopic growth behavior of a carbon-dominated aerosol in Yosemite National Park , 2005 .

[13]  Nicholas Good,et al.  Analysis of the hygroscopic and volatile properties of ammonium sulphate seeded and unseeded SOA particles , 2008 .

[14]  Scot T. Martin,et al.  Phase Transitions of Aqueous Atmospheric Particles. , 2000, Chemical reviews.

[15]  C. Chan,et al.  The effects of organic species on the hygroscopic behaviors of inorganic aerosols. , 2002, Environmental science & technology.

[16]  P. Zieger,et al.  Measured and predicted aerosol light scattering enhancement factors at the high alpine site Jungfraujoch , 2009 .

[17]  F. Geng,et al.  Particulate nitrate formation in a highly polluted urban area: a case study by single-particle mass spectrometry in Shanghai. , 2009, Environmental science & technology.

[18]  Xiuji Zhou,et al.  Hygroscopic growth of aerosol scattering coefficient: A comparative analysis between urban and suburban sites at winter in Beijing , 2009 .

[19]  Mark J. Rood,et al.  Impact of particulate organic matter on the relative humidity dependence of light scattering: A simplified parameterization , 2005 .

[20]  Chunsheng Zhao,et al.  Diurnal variations of aerosol optical properties in the North China Plain and their influences on the estimates of direct aerosol radiative effect , 2015 .

[21]  C. Chan,et al.  Relative Humidity-Dependent HTDMA Measurements of Ambient Aerosols at the HKUST Supersite in Hong Kong, China , 2015 .

[22]  J. Jayne,et al.  Characterization of summer organic and inorganic aerosols in Beijing, China with an Aerosol Chemical Speciation Monitor , 2012 .

[23]  H. Jonsson,et al.  Influence of humidity on the aerosol scattering coefficient and its effect on the upwelling radiance during ACE-2 , 2000 .

[24]  L. Alados-Arboledas,et al.  Study of the relative humidity dependence of aerosol light-scattering in southern Spain , 2014 .

[25]  Chunsheng Zhao,et al.  A possible positive feedback of reduction of precipitation and increase in aerosols over eastern central China , 2006 .

[26]  E. Swietlicki,et al.  Hygroscopic growth of aerosol particles in the marine boundary layer over the Pacific and Southern Oceans during the First Aerosol Characterization Experiment (ACE 1) , 1998 .

[27]  J. Seinfeld,et al.  Determination of Water Activity in Ammonium Sulfate and Sulfuric Acid Mixtures Using Levitated Single Particles , 1994 .

[28]  David D. Turner,et al.  Comparison Between Lidar and Nephelometer Measurements of Aerosol Hygroscopicity at the Southern Great Plains Atmospheric Radiation Measurement Site , 2013 .

[29]  Junying Sun,et al.  Observations of relative humidity effects on aerosol light scattering in the Yangtze River Delta of China , 2015 .

[30]  W. Malm,et al.  Hygroscopic properties of an organic-laden aerosol , 2005 .

[31]  Ernest Weingartner,et al.  Effects of relative humidity on aerosol light scattering: results from different European sites , 2012 .

[32]  P. Zieger,et al.  Low hygroscopic scattering enhancement of boreal aerosol and the implications for a columnar optical closure study , 2015 .

[33]  R. Hoff,et al.  Hygrosopicity measurements of aerosol particles in the San Joaquin Valley, CA, Baltimore, MD, and Golden, CO , 2016 .

[34]  R. Charlson,et al.  Sulfuric Acid-Ammonium Sulfate Aerosol: Optical Detection in the St. Louis Region , 1974, Science.

[35]  Nobuo Sugimoto,et al.  Influences of relative humidity and particle chemical composition on aerosol scattering properties during the 2006 PRD campaign , 2008 .

[36]  P. Zieger,et al.  Light scattering enhancement factors in the marine boundary layer (Mace Head, Ireland) , 2010 .

[37]  W. Malm,et al.  Estimates of aerosol species scattering characteristics as a function of relative humidity , 2001 .

[38]  Neal Lott,et al.  The Integrated Surface Database: Recent Developments and Partnerships , 2011 .

[39]  J. Seinfeld,et al.  Water activities of NH4NO3/(NH4)2SO4 solutions , 1992 .