Sea ice Atmosphere Lagrangian Transport of SALT

Our project tries to answer the question: “What kind of role do sea ice and frost flowers play as the source of sea salt aerosols in polar regions and what influences do the meteorological parameters have on the generation of sea salt aerosols and their transport in the atmosphere?”.

Long-time measurements of aerosols at coastal stations in Antarctica show a strong depletion of sulfate during Antarctic winter. The same phenomena is also observed in frost flowers. This suggests that sea ice is a major source of atmospheric sea salt in Antarctica and gives new insights for the interpretation of ice core records. Moreover, sea ice and sea salt aerosols are thought to be the source of reactive Bromine and other halogen compounds which destroy effectively ozone in the troposphere.

25 years of continuous aerosol measurement at Neumayer station in Antarctica give us the possibility to make a statistical analysis of sea salt aerosols. Trajectory analyses are implemented to follow the atmospheric transport and therefore to determine the source regions of observed sea salt aerosols. A box model will be developed to compare the various influences of meteorological parameters on the mass of sea salt aerosols produced so that quantitative parameterization can be transferred to global circulation models which include detailed description of atmospheric chemistry and aerosols to investigate the generation of halogen chemistry and ozone destruction in the troposphere.

Scientists

Prof. Dr. Lars Kaleschke
Institute of Oceanography
University of Hamburg

Dr. Xiangshan Tian-Kunze
Institute of Oceanography
University of Hamburg

Research areas

Neumayer Station (70.65°S, 8.25°W), Antarctica and its surroundings

Publications

Weller R, Wagenbach D, Legrand M, Elsässer C, Tian-Kunze X, König-Langlo G, 2011. A continuous 25-yr aerosol records at coastal Antarctica I: inter-annual variability of ionic compounds and links to climate indices. Tellus B. doi: 10.1111/j.1600-0889.2011.00542.x

Begoin M, Richter A, Weber M, Kaleschke L, Tian-Kunze X, Stohl A, Theys N, Burrows JP, 2010. Satellite observations of long range transport of a large BrO plume in the Arctic. Atmospheric Chemistry and Physics 10, 6515-6526. doi:10.5194/acp-10-6515-2010

Mahajan AS, Shaw M, Oetjen H, Hornsby KE, Carpenter LJ, Kaleschke L, Tian-Kunze X, Lee JD, Moller SJ, Edwards P, Commane R, Ingham T, Heard DE, Plane JMC, 2010. Evidence of reactive iodine chemistry in the Arctic boundary layer. Journal of Geophysical Research-Atmospheres 115, D20303. doi:10.1029/2009JD013665

Morin S, Savarino J, Frey M, Domine F, Jacobi HW, Kaleschke L, Martins JMF, 2009. Comprehensive isotopic composition of atmospheric nitrate in the Atlantic Ocean boundary layer from 65S to 79N. Journal of Geophysical Research-Atmospheres 114, D05303. doi: 10.1029/2008JD010696R

Zhao TL, Gong SL, Bottenheim JW, McConnell JC, Sander R, Kaleschke L, Richter A, Kerkweg A, Toyota K, Barrie LA, 2009. A three dimensional model study on the production of BrO and Arctic boundary layer ozone depletion, Journal of Geophysical Research-Atmospheres 113, D24304. doi: 10.1029/2008JD010631

Tian-Kunze X, Kaleschke L, Weller R, König-Langlo G, Wagenbach D, 2008. A trajectory study of sea salt aerosol measured at Neumayer, Antarctica. AICI-Hit-SPARC Workshop 15.6-18.6 2008, Cambridge, England.

Kaleschke L, Richter A, Burrows JP, Sander R, Weller R, König-Langlo G, Jacobi HW, Wagenbach D, 2007. Die Rolle des Meereises als Quelle von Salzaerosol, Meteorologentagung DACH 2007,Vol. 1.

Simpson WR, von Glasow R, Riedel K, Anderson P, Ariya P, Bottenheim J, Burrows J, Carpenter LJ, Friess U, Goodsite ME, Heard D, Hutterli M, Jacobi HW, Kaleschke L, Neff B, Plane J, Platt U, Richter A, Roscoe H, Sander R, Shepson P, Sodeau J, Steffen A, Wagner T, Wolff E, 2007. Halogens and their role in polar boundary-layer ozone depletion. Atmospheric Chemistry and Physics 7, 4375-4418.

Jacobi HW, Kaleschke L, Richter A, Rozanow A, Burrows JP, 2006. Observation of a fast ozone loss in the marginal ice zone of the Arctic Ocean, Journal of Geophysical Research-Atmospheres 111(D15), D15309.

Sander R, Burrows J, Kaleschke L, 2006. Carbonate precipitation in brine - a potential trigger for tropospheric ozone depletion events, Atmospheric Chemistry and Physics 6, 4653-4658.

Kaleschke L, Richter A, Burrows J, Afe O, Heygster G, Notholt J, Rankin AM, Roscoe HK, Hollwedel J, Wagner T, Jacobi HW, 2004. Frost flowers on sea ice as a source of sea salt and their influence on tropospheric halogen chemistry. Geophysical Research Letters 31, L16114.

Homepage

To see our homepage press link http://www.ifm.uni-hamburg.de

Research funding organisation

German Research Foundation

Project number: KA 2694/2
Funding period: January 2008 - December 2009