Baltic Sea Experiment

Project Description
The Baltic Sea experiment (BALTEX) is one of the five
continental-scale experiments of the Global Energy and Water
Cycle Experiment (GEWEX). BALTEX aims to provide a better
understanding of the processes of the climate system and to
improve and to validate the water cycle in regional numerical
models for weather forecasting and climate studies. A major
effort is undertaken to couple interactively the atmosphere with
the vegetated continental surfaces and the Baltic Sea including
its sea-ice. Major achievements have been obtained in an
improved understanding of related exchange processes. For the
first time an interactive atmosphere-ocean-land surface model
for the BALTEX area was tested.

The "Institut f?r Meereskunde" has been involved in BALTEX since
the beginning in several projects, comprehending both, modelling
and measuring activities. This includes the investigation of the
energy and water cycle from global numerical models like the
NCAR/NCEP-re-analysis projects as well as the development of a
fully coupled regional atmosphere-ocean model based on the
regional atmospheric model REMO and the coupled sea-ice-ocean
model BSIOM. Due to the lack of suitable instruments to measure
precipitation under high wind speeds, the development of a new
ship rain gauge started several years ago within the frame of
WOCE (World Ocean Experiment) and was completed within
BALTEX. This new type of ship rain gauges has been mounted on
several merchant ships travelling from Germany to Finland to
perform routinely precipitation measurements over the Baltic
Sea.

Major contributions to BALTEX have been provided by the IfM Kiel
through the EU Projects BASYS (Baltic Sea System Study,
1996-1999) and PEP (Pilot Study of Evaporation and Precipitation
in BALTEX, 1998-2000) and the BMBF-funded project Water Cycle
(1994- 2000). Within a DFG-funded project, the Kiel Baltic Sea
model (BSIOM) has been coupled to the regional atmospheric model
REMO to study the coupling mechanisms on a regional scale.

For more information, link to
http://w3.gkss.de/baltex/baltex_home.html

[Summary provided by Andreas Villwock]