The current assessment of
progress towards MAI of nitrogen and phosphorus is based on data on normalized
average total input to the sub-basins of the Baltic Sea during 2012-2015. The
fulfilment of MAI is identified by comparing the total input to a particular
sub-basin with the Maximum Allowable Input for that sub-basin. The progress achieved
by 2015 is given in percentages of MAI where values below 100% indicate
fulfilling the requirements of the HELCOM nutrient reduction scheme.
reduction of nutrients input has been achieved for the whole Baltic Sea. This
assessment shows that the normalized input of nitrogen was reduced by 12% and
phosphorus by 25% between the reference period (1997-2003) and 2015 (Core pressure indicator on nutrient
figure 1). The maximum allowable input (MAI) of nitrogen in this period was
fulfilled in the Kattegat, Danish Straits, Bothnian Bay and Bothnian Sea (Results tables). Nitrogen input into the Gulf
of Riga is below MAI but cannot be considered as fulfilled due to statistical
uncertainty. MAI for phosphorus input is fulfilled in the Kattegat, Danish
Straits and Bothnian Sea. The inputs to the Gulf of Finland and Bothnian Bay are
below MAI but cannot be considered as fulfilled due to statistical uncertainty.
Results tables. The trend-based estimate for normalized annual inputs of (a) nitrogen and (b) phosphorus during 2015.
The table also contains data on statistical uncertainty, the remaining reduction needed to reach MAI and inputs in 2015 including statistical uncertainty in percentages of MAI. Classification of achieving MAI is given in colours: green=MAI fulfilled, yellow= fulfilment is not determined due to statistical uncertainty, and red=MAI not fulfilled. (Units in columns 2-5: tonnes per year).NOTE: For consistency with MAI no rounding (to tenth, hundreds or thousands) has been performed in the indicator.
*As adopted by the 2013
HELCOM Copenhagen Ministerial Meeting (HELCOM 2013a)
**Exceedance of MAI is
caused by statistical data uncertainty.
Core pressure indicator on nutrient
inputs (MAI follow up)
Nutrients inputs in 1995-2015