Dr Sarah Norris
Dr Sarah Norris
Institute for Climate and Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds, LS2 9JT
UK
Phone: +44 113 343 36473
Email: S.J.Norris@leeds.ac.uk
Home | Publications
| Projects | CLASP SEASAW Field
Observations of Sea Spray, Gas Fluxes, and Whitecaps: SEASAW This
project run
at the University of Leeds involving Ian Brooks, Michael Smith, Sarah
Norris, Barbara Brooks, Justin Lingard, Jim
McQuaid, and Paul Smith. SEASAW
is a UK SOLAS
project and addressed the issues of both trace gas transfer velocities and the
sea-spray aerosol source function. Two field campaigns were scheduled on
the RRS Discovery: a joint cruise with the closely related Deep Ocean Gas
Exchange Experiment (DOGEE)
in November/December 2006, and a second cruise in March/April 2007. The
SEASAW project is also in close contact with the SOLAS HiWASE
project based in NOC, Southampton. During SEASAW direct eddy covariance
estimates of the turbulent fluxes of aerosol were made, along with those of
CO2, ozone, and momentum, heat, and water vapor.
All flux instrumentation was located at the top of the foremast, along with
a sonic anemometer and motion package. The aerosol flux package is based
around the CLASP
instrument developed at Leeds. A second aerosol package was combined with
the TNO miniature bubble system to look at sea spray production in the
lowest meter of the atmosphere from a buoy. The first SEASAW cruise D313 was
completed in December 2006 and even though the weather conditions were
slightly stronger than hoped for the cruise from the University of Leeds
point of view was successful. Fluxes of aerosols and the gases listed above
were recorded in a number of very high wind measurements, ten minute mean
10 m wind speeds were measured by the flux system at a max of 24 m s-1..
The buoy system was deployed on a number of occasions and successfully
gathered measurements of the near surface size distributions of particles
along with the bubble size distributions. The second cruise D317 was completed in
April 2007 and was very successful. The wind speeds were not as high as
D313 but the max 10 m sustained wind speed was measured as 22 m s-1.
A diary of this cruise can be viewed here.
Results from SEASAW are in the process of
being published and a list of publications can be found here.
