Change search
ReferencesLink to record
Permanent link

Direct link
Aerosol and bacterial emissions from Baltic Seawater
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Show others and affiliations
2011 (English)In: Atmospheric research, ISSN 0169-8095, Vol. 99, no 1, 1-14 p.Article in journal (Refereed) Published
Abstract [en]

Factors influencing the production of primary marine aerosol are of great importance to better understand the marine aerosols' impact on our climate. Bubble-bursting from whitecaps is considered the most effective mechanism for sea spray production, and a way of sea–air transfer for some bacterial species.

Two coastal sites in the Baltic Sea were used to investigate aerosol and bacterial emissions from the bubble-bursting process by letting a jet of water hit a water surface within an experimental tank, mimicking the actions of breaking waves.

The aerosol size distribution spectra from the two sites were similar and conservative in shape where the modes were centered at about 200 nm dry diameter. We found a distinct decrease in bubbled aerosol production with increasing water temperature. A clear diurnal cycle in bubbled aerosol production was observed, anticorrelated with both water temperature and dissolved oxygen, which to our knowledge has never been shown before. A link between decreasing aerosol production in daytime and phytoplankton activity is likely to be an important factor. Colony-forming bacteria were transferred to the atmosphere via the bubble-bursting process, with a linear relationship to their seawater concentration.

Place, publisher, year, edition, pages
2011. Vol. 99, no 1, 1-14 p.
Keyword [en]
Marine aerosol, Surface water temperature, Marine bacteria, Diurnal cycles, Photosynthesis
National Category
URN: urn:nbn:se:su:diva-43538DOI: 10.1016/j.atmosres.2010.08.018ISI: 000285988300001OAI: diva2:357704
Available from: 2010-10-19 Created: 2010-10-19 Last updated: 2012-01-23Bibliographically approved
In thesis
1. Primary Marine Aerosol Production: Studies using bubble-bursting experiments
Open this publication in new window or tab >>Primary Marine Aerosol Production: Studies using bubble-bursting experiments
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Aerosol particles affect the Earth’s climate, although their impact is associated with large uncertainties. Primary marine aerosol represents a significant fraction of the global aerosol budget considering the Earth’s 70-percentage coverage by oceans. They are produced when bubbles burst at the ocean surface and can consist of sea salt, organic matter and bacteria. An experimental approach was here used to investigate the primary marine aerosol production from the bubble-bursting mechanism using water from four different geographical locations. The main findings include:

  • Similar and stable aerosol number size distributions at all locations, centered close to 0.2 μm.
  • Largely varying aerosol organic fractions, both with size and location.
  • Clear tendency for increased water temperature to negatively influence the aerosol production.
  • No covariance between surface water chlorophyll α and aerosol production on a 10-minute time scale, although decreased aerosol production was observed at times of elevated phytoplankton activity on longer time scales.
  • Mainly external mixtures of sea salt and organics was observed.
  • A high tendency for colony-forming marine bacteria to use bubble-bursting to reach the atmosphere.
  • A clear diurnal cycle in aerosol production was found for both laboratory produced aerosol and in-situ aerosol fluxes, probably biologically driven.
  • The first near coastal sea spray fluxes with limited fetch and low salinity.

While the primary marine aerosol spectral shape is stable, emission concentration varies with environmental parameters. Above that, the organic fraction of the aerosol varies largely between locations. This shows that observations of primary marine aerosol emissions not necessarily can be applied to large time- or spatial scales.

Place, publisher, year, edition, pages
Stockholm: Department of Applied Environmental Science (ITM), Stockholm University, 2010. 44 p.
sea spray, water temperature, dissolved oxygen, photosynthesis, bacterial emissions, V-TDMA, mixing state, eddy covariance
National Category
Natural Sciences
Research subject
Applied Environmental Science
urn:nbn:se:su:diva-43544 (URN)978-91-7447-159-5 (ISBN)
Public defence
2010-12-01, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 10:00 (English)
At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: In press. Paper 3: Manuscript. Paper 4: Manuscript. Available from: 2010-11-09 Created: 2010-10-19 Last updated: 2011-03-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Hultin, KimKrejci, RadovanMårtensson, MonicaNilsson, Douglas
By organisation
Department of Applied Environmental Science (ITM)
In the same journal
Atmospheric research

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 118 hits
ReferencesLink to record
Permanent link

Direct link