How to reliably detect molecular clusters and nucleation mode particles with Neutral cluster and Air Ion Spectrometer (NAIS)

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Manninen , H E , Mirme , S , Mirme , A , Petäjä , T & Kulmala , M 2016 , ' How to reliably detect molecular clusters and nucleation mode particles with Neutral cluster and Air Ion Spectrometer (NAIS) ' Atmospheric Measurement Techniques , vol. 9 , no. 8 , pp. 3577-3605 . DOI: 10.5194/amt-9-3577-2016

Title: How to reliably detect molecular clusters and nucleation mode particles with Neutral cluster and Air Ion Spectrometer (NAIS)
Author: Manninen, Hanna E.; Mirme, Sander; Mirme, Aadu; Petäjä, Tuukka; Kulmala, Markku
Contributor: University of Helsinki, Division of Atmospheric Sciences and Geophysics (Department of Physics) (-2009)
University of Helsinki, Institute for Atmospheric and Earth System Research
University of Helsinki, Institute for Atmospheric and Earth System Research
Date: 2016-08-03
Language: eng
Number of pages: 29
Belongs to series: Atmospheric Measurement Techniques
ISSN: 1867-1381
URI: http://hdl.handle.net/10138/167766
Abstract: To understand the very first steps of atmospheric particle formation and growth processes, information on the size where the atmospheric nucleation and cluster activation occurs, is crucially needed. The current understanding of the concentrations and dynamics of charged and neutral clusters and particles is based on theoretical predictions and experimental observations. This paper gives a standard operation procedure (SOP) for Neutral cluster and Air Ion Spectrometer (NAIS) measurements and data processing. With the NAIS data, we have improved the scientific understanding by (1) direct detection of freshly formed atmospheric clusters and particles, (2) linking experimental observations and theoretical framework to understand the formation and growth mechanisms of aerosol particles, and (3) parameterizing formation and growth mechanisms for atmospheric models. The SOP provides tools to harmonize the world-wide measurements of small clusters and nucleation mode particles and to verify consistent results measured by the NAIS users. The work is based on discussions and interactions between the NAIS users and the NAIS manufacturer.
Subject: DIFFERENTIAL MOBILITY ANALYZER
CHARGED AEROSOL-PARTICLES
SLIP CORRECTION MEASUREMENTS
NUMBER SIZE DISTRIBUTIONS
ATMOSPHERIC NUCLEATION
FORMATION EVENTS
BOREAL FOREST
LONG-TERM
CORONA CHARGER
GLOBAL SCALES
114 Physical sciences
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