Improving mercury flux chamber measurements over water surface.
A modified floating flux chamber was designed and used to measure mercury evasional fluxes in a coastal area of the Mediterranean Sea in different meteo-marine conditions during the hours of maximum insolation (PAR intensity 360-430 W m(-2)) in the summer season. The chamber has been modified providing a flap at the inlet port preventing the back-flow of air from the interior of the chamber. Results demonstrate that the modified flux chamber gives flux values noticeably higher both in rippled sea conditions (mean value 7.88 +/- 1.45 ng m(-2) h(-1)) and in rough sea conditions (mean value 21.71 +/- 2.17 ng m(-2) h(-1)) with respect to those obtained by using the unmodified chamber (respectively 5.23 +/- 0.67 and 14.15 +/- 1.03 ng m(-2) h(-1)).
Lanzillotra
E
E
CNR-Institute of Biophysics, Area della Ricerca, Via Moruzzi 1, I-56100 Pisa, Italy.
Ceccarini
C
C
Ferrara
R
R
D000388:Air; D004784:Environmental Monitoring; D008522:Mediterranean Sea; D008628:Mercury / Q000032:analysis*; D014867:Water / Q000737:chemistry; D014872:Water Movements; D014873:Water Pollutants / Q000032:analysis*
D014873:Water Pollutants; D014867:Water; D008628:Mercury