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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

. Biomass burning (BB) activities have a great impact on the particle number size distribution(PNSD) in the upper troposphere of the Tibetan Plateau, which could affectregional and global climate. An intensive campaign focused on the measurementof the PNSD, gaseous pollutants, and meteorological parameters was conductedat Mt. Yulong, a high-altitude site (3410 m a.s.l.) on the southeasternTibetan Plateau during the pre-monsoon season (22 March to 15 April). Duringthis period, intensive BB activities in southern Asia were detected by firemaps. The long-range transport of BB pollutants can increase the accumulation modeparticles in the background atmosphere at Mt. Yulong. As a consequence, thecloud condensation nuclei (CCN) concentration was found to be 2–8 timeshigher during BB periods than during clean periods. Apart from BB, variationsof the planet boundary layer (PBL) and new particle formation (NPF) wereother factors that influenced the PNSD. However, only three NPF events (witha frequency of 14 %) were observed at Mt. Yulong. The occurrence of NPFevents during clean episodes corresponded to an elevated PBL or transportedBB pollutants. Due to the lack of condensable vapors including sulfuric acidand organic compounds, the newly formed particles were not able to grow toCCN size. Our study emphasizes the influences of BB on the aerosol and CCNconcentration in the atmosphere of the Tibetan Plateau. These results alsohave the potential to improve our understanding of the variation of theparticle concentration in the upper troposphere, and provide information forregional and global climate models.

atmospheric chemistry and physics

Particle number size distribution and new particle formation under the influence of biomass burning at a high altitude background site at Mt. Yulong (3410 m), China