Revision of the country allocation of nutrient reductions in the Baltic Sea Action Plan.  Section A: Hydrological adjusted riverine loads and atmospheric loads from different countries averaged for 2000 - 2006 : Technical Report No. 1

• HELCOM has asked BNI to revise the country-wise nutrient allocations of the Baltic Sea Action Plan using the new data available on atmospheric loads (EMEP) and more recent calculations on loads from the drainage basins (PLC5).We are here reporting the most recent and updated data on loads from the drainage basins, averaged for 2000-2006 and 1997-2003, based on data supplied by the HELCOM member states for the preparation of the Fifth Pollution Load compilation (PLC5).The nutrient load data for 1997-2003, the period used for the original country allocation sceme of BSAP as signed in Krakow 2007, have been updated as well as new estimates for 2000-2006. The latter period has been suggested by HELOM as the foundation for an updated BSAP.However, these periods include several very dry or wet years. Drastic changes of the inputs seen in these data may therefore partly reflect these hydrological variations rather thanreal changes of loads due to efforts by the countries to reduce emissions. We therefore found it necessary to normalise these values, taking into account variations in riverine flows.Russian data were found to be very incomplete and we therefore had to re-evaluate and compute new estimates, beyond those available in the PLC5 database.We also report recent calculations on atmospheric loads to the different Baltic sub basins, averaged for 1997-2003 and 2000-2006, made available on the Internet by EMEP and integrated into NEST. The loads are now source allocated to the different HELCOM countries and other sources in order to be used in the revision of the country allocation scheme of BSAP.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)

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