An overview of the Lagrangian experiments undertaken during the North Atlantic regional Aerosol Characterisation Experiment (ACE-2)

• DOI: 10.3402/tellusb.v52i2.16110
• Publication Date: 2012-12-17T14:14:48Z
• Authors: Doug W. Johnson; Simon Osborne; Robert Wood; Karsten Suhre; Randy Johnson; Steven Businger; Patricia K. Quinn; Alfred Wiedensohler; Philip A. Durkee; Lynn M. Russell; Meinrat O. Andreae; Colin O’Dowd; Kevin J. Noone; Brian Bandy; J. Rudolph; Spyros Rapsomanikis
• Keywords: Lagrangian analysis; Entrainment (biomusicology); Lagrangian particle tracking

One of the primary aims North Atlantic regional Aerosol Characterisation Experiment (ACE-2) was to quantify physical and chemical processes affecting evolution major aerosol types over Atlantic. The best, practical way doing this is in a Lagrangian framework where parcel air sampled several tens hours its properties are intensively measured. During intensive observational phase ACE-2, between 15 June 1997 24 July 1997, 3 cloudy experiments cloud-free, were undertaken south west tip Iberian Peninsula Canary Islands. This paper gives an overview logistics all compares contrasts them provide for more focused papers issue future process modelling studies parametrisation development. characteristics remarkably different, enabling wide range different be studied. In 1st Lagrangian, clean maritime mass which salt particle production, due increased wind speed, dominated change accumulation mode concentrations. 2nd extensive cloud cover resulted processing polluted mass, entrainment from free troposphere influenced overall decrease concentrations marine boundary layer (MBL). Very little measured 3rd pollution MBL continually being topped up by entraining residual continental (CBL) above. From analysis experiments, it has been possible formulate, present here, generalised description European outbreak sub-tropical