Articles | Volume 9, issue 3
Atmos. Chem. Phys., 9, 823–829, 2009
Atmos. Chem. Phys., 9, 823–829, 2009

  02 Feb 2009

02 Feb 2009

The time dependence of molecular iodine emission from Laminaria digitata

S. Dixneuf1, A. A. Ruth1, S. Vaughan1, R. M. Varma1, and J. Orphal1,2 S. Dixneuf et al.
  • 1Department of Physics, University College Cork, Cork, Ireland
  • 2Laboratoire Interuniversitaire des Systèmes Atmosphériques, Université de Paris-Est, Créteil, France

Abstract. We present the first in situ detection of molecular iodine emitted from the brown macroalga Laminaria digitata under natural stress conditions. We show that the release of I2 occurs in short, strong bursts with a complex time signature. The new data indicate that algal control of I2 release in the form of an oscillatory time-dependence may be based on a nonlinear autocatalytic reaction scheme which is closely linked to the production of H2O2.

Final-revised paper