Natural new particle formation at the coastal Antarctic site Neumayer


Contact
Rolf.Weller [ at ] awi.de

Abstract

We measured condensation particle (CP) concentrations and particle size distributions at the coastal Antarctic station Neumayer (70°39'S, 8°15'W) during two summer campaigns (from 20 January to 26 March 2012 and 1 February to 30 April 2014) and during polar night between 12 August and 27 September 2014 in the particle diameter (Dp) range from 2.94 nm to 60.4 nm (2012) and from 6.26 nm to 212.9 nm (2014). During both summer campaigns we identified all in all 44 new particle formation (NPF) events. From 10 NPF events, particle growth rates could be determined to be around 0.90±0.46 nm h-1 (mean ± std; range: 0.4 nm h-1 to 1.9 nm h-1). With the exception of one case, particle growth was generally restricted to the nucleation mode (Dp < 25 nm) and the duration of NPF events was typically around 6.0±1.5 h (mean ± std; range: 4 h to 9 h). Thus in the main, particles did not grow up to sizes required for acting as cloud condensation nuclei. NPF during summer usually occurred in the afternoon in coherence with local photochemistry. During winter, two NPF events could be detected, though showing no ascertainable particle growth. A simple estimation indicated that apart from sulfuric acid, the derived growth rates required other low volatile precursor vapours.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Research Networks
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
37643
DOI 10.5194/acp-15-11399-2015

Cite as
Weller, R. , Schmidt, K. , Teinilä, K. and Hillamo, R. (2015): Natural new particle formation at the coastal Antarctic site Neumayer , Atmospheric Chemistry and Physics, 15 (19), pp. 11399-11410 . doi: 10.5194/acp-15-11399-2015


Download
[img]
Preview
PDF
acp-15-11399-2015.pdf

Download (1MB) | Preview
Cite this document as:
[img]
Preview
PDF
SupplementaryMat_acp-2015-242.pdf

Download (3MB) | Preview
Cite this document as:

Share


Citation

Research Platforms

Campaigns


Actions
Edit Item Edit Item