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Formation and growth of fresh atmospheric aerosols: eight years of aerosol size distribution data from SMEAR II, Hyytiälä, Finland
We analyzed size distributions measured continuously at a boreal forest measurement site at Hyytiala, Finland between 1996 and 2003. From the eight-year data we identified days when new aerosolExpand
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Station for Measuring Ecosystem-Atmosphere Relations: SMEAR
We planned and implemented the SMEAR II and I measuring systems to measure material and energy fluxes between forest ecosystem and its surroundings and within the ecosystem. In addition, we measuredExpand
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Evolution of Organic Aerosols in the Atmosphere
Framework for Change Organic aerosols make up 20 to 90% of the particulate mass of the troposphere and are important factors in both climate and human heath. However, their sources and removalExpand
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Flood or Drought: How Do Aerosols Affect Precipitation?
Aerosols serve as cloud condensation nuclei (CCN) and thus have a substantial effect on cloud properties and the initiation of precipitation. Large concentrations of human-made aerosols have beenExpand
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Cluster activation theory as an explanation of the linear dependence between formation rate of 3nm particles and sulphuric acid concentration
According to atmospheric observations new particle formation seems to be a function of sulphuric acid concentration to the power from one to two. The nucleation theorem then predicts that theExpand
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Temperature and light dependence of the VOC emissions of Scots pine
The volatile organic compound (VOC) emission rates of Scots pine (Pinus sylvestris L.) were measured from trees growing in a natural forest environment at two locations in Finland. The observed totalExpand
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A large source of low-volatility secondary organic aerosol
Forests emit large quantities of volatile organic compounds (VOCs) to the atmosphere. Their condensable oxidation products can form secondary organic aerosol, a significant and ubiquitous componentExpand
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Marine aerosol formation from biogenic iodine emissions
The formation of marine aerosols and cloud condensation nuclei—from which marine clouds originate—depends ultimately on the availability of new, nanometre-scale particles in the marine boundaryExpand
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A wide-range multi-channel Air Ion Spectrometer
A new multi-channel air ion spectrometer (AIS) is presented. The instrument allows simultaneous measurements of positive and negative ion distributions from 3.2 to 0.0013 cm 2 V -1 s -1 (0.80-40 nmExpand
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Stable sulphate clusters as a source of new atmospheric particles
The formation of new atmospheric particles with diameters of 3–10 nm has been observed at a variety of altitudes and locations. Such aerosol particles have the potential to grow into cloudExpand
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