New particle formation in the tropical free troposphere during CAMP2Ex: statistics and impact of emission sources, convective activity, and synoptic conditions
Qian Xiao,Jiaoshi Zhang,Yang Wang,Luke D. Ziemba,Ewan Crosbie,Edward L. Winstead,Claire E. Robinson,Joshua P. DiGangi,Glenn S. Diskin,Jeffrey S. Reid,K. Sebastian Schmidt,Armin Sorooshian,Miguel Ricardo A. Hilario,Sarah Woods,Paul Lawson,Snorre A. Stamnes,and Jian Wang
Qian Xiao
Department of Energy, Environmental, and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
Using recent airborne measurements, we show that the influences of anthropogenic emissions, transport, convective clouds, and meteorology lead to new particle formation (NPF) under a variety of conditions and at different altitudes in tropical marine environments. NPF is enhanced by fresh urban emissions in convective outflow but is suppressed in air masses influenced by aged urban emissions where reactive precursors are mostly consumed while particle surface area remains relatively high.
Using recent airborne measurements, we show that the influences of anthropogenic emissions,...