illustrates the clear situation after the EVRS based
harmonized vertical reference system has been
taken into use.
It is vital for the mariner that charted depths and
broadcasted water level information are in the same
reference system. To provide all the information
safely and reliably to the users during the transition
period, it is essential to have a good cooperation
and communication between different organisations
like national hydrographic offices, geodetic and
oceanographic organizations (e.g. BOOS) and
mariners and other users of water level data both in
national and international level.
CDWG will now concentrate on guiding the
implementation process of the harmonized vertical
reference system by preparing a road map and
monitoring the status of the implementation
process. CDWG supports efficient international
communication and cooperation with relevant
bodies. In addition CDWG will study other water
level related issues, e.g. possibilities to develop
common geoid model for the Baltic Sea and foster
studies related to dynamic topography of sea surface
in the Baltic Sea.
The implementation process will take several
years: the transition is estimated to be completed
by 2020. To make the transition process successful
one of the key issues is to get all relevant national
and international bodies to communicate and
cooperate together. CDWG is one node point for
this important international network.
Jyrki Mononen is working at the Finnish Transport Agency.
Since 2013 he has been acting as the chairman of the BSHC
CDWG.
Dr U iltneil Ellmer is working at the Federal Maritime and
Hydrographic Agency in Rostock, Germany. He is the German
representative in the BSHC CDWG.
Thomas Hammarklint is working at the Swedish Meteorological
and Hydrological Institute (SMHI). Since 2003 he has been
working with exchange of water level data in the Baltic Sea and
is the BOOS representative in the BSHC CDWG.
Lars Jakobsson is working at the Swedish Maritime Administration.
He is the Swedish representative in the BSHC CDWG.
E-mail: jyrM.mononenfb.liikennevirasto.fi.
INSTITUTIONAL
RESEARCH TOPIC AT
THE MARINE SYSTEMS
INSTITUTE FOR
2014-2019
Urmas Lips
halocline) of the Baltic Sea. The in-situ observations
using novel technologies combined with remote
sensing and high-resolution numerical simulations
are the main study method that allows tracking
of physical and biogeochemical signal dynamics
at a wide range of temporal and spatial scales.
We aim to make a substantial step forward in the
quantitative description of submesoscale processes
and their impact on the biogeochemical cycles in
the stratified Baltic Sea.
Background
A six-year proj ect aiming at enhancing predictability
of the Baltic Sea system was initiated by the research
team of the Marine Systems Institute at Tallinn
University of Technology in 2014 (supported by the
Estonian Ministry of Education and Research). The
project is focused on multi-scale physical processes
that significantly control the biogeochemical cycles
of substances as well as mixing and dispersion of
particles and pollutants, especially in the boundary
layers (near-surface and near-bottom layer) and
in the pycnoclines (seasonal thermocline and
Methods of in-situ observations
While the study is based on the combined use of the
data from in-situ and remote sensing observations
and numerical simulations, here the approaches
of in-situ observations focused on processes in
the upper and subsurface (thermocline) layers are
presented. The core of the measurement complex
