English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Biogenic aerosol formation is likely to contribute significantly to theglobal aerosol load. In recent years, new-particle formation has beenobserved in various ecosystems around the world but hardly any measurementshave taken place in the terrestrial Southern Hemisphere. Here, we report thefirst results of atmospheric ion and charged particle concentrations as wellas of new-particle formation in a Eucalypt forest in Tumbarumba, South-EastAustralia, from July 2005 to October 2006. The measurements were carried outwith an Air Ion Spectrometer (AIS) with a size range from 0.34 to 40 nm. TheEucalypt forest was a very strong source of new aerosol particles. Daytimeaerosol formation took place on 52% of days with acceptable data, whichis 2–3 times as often as in the Nordic boreal zone. Average growth rates fornegative/positive 1.5–3 nm particles during these formation events were2.89/2.68 nmh−1, respectively; for 3-7 nm particles 4.26/4.03, and for7–20 nm particles 8.90/7.58 nmh−1, respectively. The growth rates forlarge ions were highest when the air was coming from the native forest whichsuggests that the Eucalypts were a strong source of condensable vapours.Average concentrations of cluster ions (0.34–1.8 nm) were2400/1700 cm−3 for negative/positive ions, very high compared to mostother measurements around the world. One reason behind these highconcentrations could be the strong radon efflux from the soils around theTumbarumba field site. Furthermore, comparison between night-time anddaytime concentrations supported the view that cluster ions are producedclose to the surface within the boundary layer also at night but that largeions are mostly produced in daytime. Finally, a previously unreportedphenomenon, nocturnal aerosol formation, appeared in 32% of the analysednights but was clustered almost entirely within six months from summer toautumn in 2006. From January to May, nocturnal formation was 2.5 times asfrequent as daytime formation. Therefore, it appears that in summer andautumn, nocturnal production was the major mechanism for aerosol formationin Tumbarumba

Formation and characteristics of ions and charged aerosol particles in a native Australian Eucalypt forest