wdc-climate.de:5131620 eng; USA collection HELCOM_HD_v1 Dr. Stefan Hagemann Helmholtz-Zentrum Hereon www.hereon.de pointOfContact 2026-02-04T10:21:32 ISO 19115 ISO 19115-2:2009 Redistribution of HELCOM nutrient loads on the high resolution HD model grid (Version 1) 2023-06-22 publication 1 HELCOM_HD_v1 doi:10.26050/WDCC/HELCOM_HD_v1 Dr. Stefan Hagemann Helmholtz-Zentrum Hereon www.hereon.de Email: stefan.hagemann@hereon.de principalInvestigator Dr. Stefan Hagemann Helmholtz-Zentrum Hereon www.hereon.de Email: stefan.hagemann@hereon.de author Dr. Thomas Neumann Leibniz-Institut für Ostseeforschung Warnemünde https://www.io-warnemuende.de/ Email: thomas.neumann@io-warnemuende.de author WDC Climate at DKRZ publisher For the Helsinki Commission (HELCOM), annual waterborne basin inflows of total nitrogen (N) and total phosphorus (P) were compiled for the seven main Baltic Sea sub-basins (Sect. 1.1). In order to allow the utilization within a regional Earth System or ocean modelling framework, we redistributed these nutrient loads spatially and temporally using a dataset of bias corrected discharge that was generated with the Hydrological Discharge (HD) model (Sect. 1.2). Following the spatial and temporal downscaling procedure described in Sect. 1.3, we generated a dataset of daily riverine and annual direct nutrient loads (N and P) into the Baltic Sea at 1/12° resolution from 1901-2019. Detailed information you can find in the specified sections of the attached PDF https://www.wdc-climate.de/ui/entry?acronym=HELCOM_HD_info In November 2023, the bias corrected discharges were improved after a bug was found (see "Bias corrected high resolution river runoff over Europe (Version 1.0)", https://doi.org/10.26050/WDCC/Biasc_hr_riverro_Eu). Consequently, the redistributed HELCOM loads of nitrogen (N) and phosphorus (P) were also updated using the improved bias corrected discharge dataset (see Version 1.1: https://www.wdc-climate.de/ui/entry?acronym=HELCOM_HD_v1_1). However, changes in the N and P loads into the Baltic Sea are marginal. The annual basin sums are the same, only daily values may have slightly changed. Dr. Stefan Hagemann Helmholtz-Zentrum Hereon www.hereon.de pointOfContact NetCDF Baltic Sea CoastalFutures Nitrogen Nutrient loads Phosphorus CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA -11.0 69.0 27.0 72.0 calendrical 1901-01-01 2019-12-31 nitrogen_mass_transport_in_river_channel nitrogen_mass_transport_in_river_channel; unit: t/d nitrogen_mass_transport_in_river_channel nitrogen_mass_transport_in_river_channel; unit: t/d phosphorus_mass_transport_in_river_channel The amount of total phosphorus mass transported in the river channels from land into the ocean. This quantity can be provided at a certain location within the river network and floodplain (over land) or at the river mouth (over ocean) where the river enters the ocean. "River" refers to water in the fluvial system (stream and floodplain). Phosphorus means phosphorus in all chemical forms, commonly referred to as "total phosphorus". [CF-Standard Name]; unit: t/d phosphorus_mass_transport_in_river_channel The amount of total phosphorus mass transported in the river channels from land into the ocean. This quantity can be provided at a certain location within the river network and floodplain (over land) or at the river mouth (over ocean) where the river enters the ocean. "River" refers to water in the fluvial system (stream and floodplain). Phosphorus means phosphorus in all chemical forms, commonly referred to as "total phosphorus". [CF-Standard Name]; unit: t/d NetCDF 1192 https://www.wdc-climate.de/ui/entry?acronym=HELCOM_HD_v1 information collection