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Nicholas R. Nalli, William L. Smith, and Quanhua Liu

is 10% (e.g., Maddy et al. 2011 ), from the vantage point of JAIVEx the GOES imagery gives the appearance of what may be considered nearly ideal clear-sky field conditions throughout the duration of the flight (and, indeed, this particular flight was intended to be just that). However, as seen in Fig. 2 , closer examination of the sky conditions using the hemispheric camera reveals the presence of marine boundary layer (MBL) fair weather cumulus clouds (FWC) (e.g., Stull 1985 ) that were

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Daniel Rothenberg and Chien Wang

availability and ambient aerosol has been rigorously developed using adiabatic and entraining parcel theory ( Seinfeld and Pandis 2006 ; Pruppacher and Klett 1997 ) and depends on details of the heterogeneous chemical composition, number, size distribution(s), and mixing state of the background aerosol ( Mcfiggans et al. 2006 ) as well as local meteorology ( Morales and Nenes 2010 ). Under polluted conditions, effects relating to chemical composition could produce a climatic effect as large as the basic

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Wojciech W. Grabowski and Hugh Morrison

carried by cloud updrafts and precipitation falling out of them can also have similar effects without any changes in the cloud dynamics (e.g., Morrison and Grabowski 2011 ). Cloud modeling is especially useful for studying aerosol effects on deep convective clouds because one can separate meteorological and aerosol conditions and quantify updraft and cloud buoyancy statistics. However, because deep convection involves nonlinear fluid dynamics, separating statistically significant physical effects

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Christina S. McCluskey, Thomas C. J. Hill, Camille M. Sultana, Olga Laskina, Jonathan Trueblood, Mitchell V. Santander, Charlotte M. Beall, Jennifer M. Michaud, Sonia M. Kreidenweis, Kimberly A. Prather, Vicki Grassian, and Paul J. DeMott

their low number concentrations in the marine boundary layer, and thus, the factors that control their release are poorly characterized or parameterized in models. As a preface to a discussion of the composition of marine INPs, we first summarize findings regarding the chemical composition of SSA. Sea salts, particulate organic matter (e.g., phytoplankton, bacteria) and dissolved organic matter (e.g., organic macromolecules and exudates) are transferred into SSA from the bulk surface seawater (upper

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Christina S. McCluskey, Thomas C. J. Hill, Francesca Malfatti, Camille M. Sultana, Christopher Lee, Mitchell V. Santander, Charlotte M. Beall, Kathryn A. Moore, Gavin C. Cornwell, Douglas B. Collins, Kimberly A. Prather, Thilina Jayarathne, Elizabeth A. Stone, Farooq Azam, Sonia M. Kreidenweis, and Paul J. DeMott

. , 119A , 8860 – 8870 , doi: 10.1021/acs.jpca.5b03488 . 10.1021/acs.jpca.5b03488 Mason , R. H. , and Coauthors , 2015 : Ice nucleating particles at a coastal marine boundary layer site: Correlations with aerosol type and meteorological conditions . Atmos. Chem. Phys. , 15 , 12 547 – 12 566 , doi: 10.5194/acp-15-12547-2015 . 10.5194/acp-15-12547-2015 McCoy , D. T. , D. L. Hartmann , M. D. Zelinka , P. Ceppi , and D. P. Grosvenor , 2015 : Mixed-phase cloud physics and Southern

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Eyal Ilotoviz, Alexander P. Khain, Nir Benmoshe, Vaughan T. J. Phillips, and Alexander V. Ryzhkov

the scheme by the temperature of the particle surface. Since the freezing of liquid in the sponge layer takes some time (depending on environmental conditions), hail that started growing by dry growth may contain interior liquid accumulated for the periods of previous wet growth. The theoretical scheme by Phillips et al. (2014 , 2015) has been implemented into HUCM. The aim of this study is to investigate the role of aerosols in the formation and growth of FDs and hail in a mixed

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Andrew R. Jongeward, Zhanqing Li, Hao He, and Xiaoxiong Xiong

observations at more than 150 national wilderness and park locations across the United States. In 1999, the U.S. EPA, in collaboration with federal and state air and land managers, announced the Regional Haze Program (RHP) to improve air quality and visibility conditions in the nation’s Class I areas (visually protected federal areas; http://www.epa.gov/visibility/visibility-regional-haze-program ). The IMPROVE Network collects 24-h air samples every third day, and IMPROVE data have been used to monitor

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