Mathematics – Logic
Scientific paper
Mar 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3306606m&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 6, CiteID L06606
Mathematics
Logic
6
Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339, 4504), Oceanography: Biological And Chemical: Gases, Oceanography: Biological And Chemical: Photochemistry
Scientific paper
The wavelength-dependence of CH2I2 photolysis was studied in the laboratory using natural seawater. Irradiations were carried out using a 1 kW Xe lamp equipped with a monochromator, and halocarbon concentrations were determined by purge-and-trap gas chromatography/mass spectrometry. The absolute quantum yields for CH2I2 photodissociation were determined between 290 and 365 nm, and varied between 0.27 and 0.39. Our calculations show that photolysis of CH2I2 under natural sunlight conditions occurs predominantly between 300 and 350 nm. In seawater, calculated CH2I2 photolysis rates decrease quickly with depth, with 90% attenuation occurring in the top 10-25 m depending on the water clarity. A simple photochemical box model of a shallow equatorial mixed layer showed that most of the CH2I2 is photolysed before reaching the sea surface, where this compound is depleted with respect to the underlying water column.
Liss Peter S.
Martino Manuela
Plane John M. C.
No associations
LandOfFree
Wavelength-dependence of the photolysis of diiodomethane in seawater does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Wavelength-dependence of the photolysis of diiodomethane in seawater, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavelength-dependence of the photolysis of diiodomethane in seawater will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1137346