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.
Hagemann, Stefan; Neumann, Thomas (2023). Redistribution of HELCOM nutrient loads on the high resolution HD model grid (Version 1). World Data Center for Climate (WDCC) at DKRZ. https://doi.org/10.26050/WDCC/HELCOM_HD_v1
SQA - Scientific Quality Assurance 'approved by author'
Result Date
2023-06-21
Technical Quality Assurance (TQA)
TQA - Technical Quality Assurance 'approved by WDCC'
Description
1. Number of data sets is correct and > 0: passed; 2. Size of every data set is > 0: passed; 3. The data sets and corresponding metadata are accessible: passed; 4. The data sizes are controlled and correct: passed; 5. The spatial-temporal coverage description (metadata) is consistent to the data, time steps are correct and the time coordinate is continuous: passed; 6. The format is correct: passed; 7. Variable description and data are consistent: passed
Method
WDCC-TQA checklist
Method Description
Checks performed by WDCC. The list of TQA metrics are documented in the 'WDCC User Guide for Data Publication' Chapter 8.1.1
[1] DOIHagemann, Stefan; Neumann, Thomas. (2023). Redistribution of HELCOM nutrient loads on the high resolution HD model grid (Version 1.1). doi:10.26050/WDCC/HELCOM_HD_v1_1
References
[1] DOIHagemann, Stefan; Stacke, Tobias; Ho-Hagemann, Ha T. M. (2020). High Resolution Discharge Simulations Over Europe and the Baltic Sea Catchment. doi:10.3389/feart.2020.00012
[2] DOIStacke, Tobias; Hagemann, Stefan. (2021). HydroPy (v1.0): A new global hydrology model written in Python. doi:10.5194/gmd-2021-53
[3] DOIHagemann, Stefan; Stacke, Tobias. (2023). Complementing ERA5 and E-OBS with high-resolution river discharge over Europe. doi:10.1016/j.oceano.2022.07.003
[4] DOICucchi, Marco; Weedon, Graham P.; Amici, Alessandro; Bellouin, Nicolas; Lange, Stefan; Müller Schmied, Hannes; Hersbach, Hans; Buontempo, Carlo. (2020). WFDE5: bias-adjusted ERA5 reanalysis data for impact studies. doi:10.5194/essd-12-2097-2020
[6] DOIDirmeyer, Paul A.; Gao, Xiang; Zhao, Mei; Guo, Zhichang; Oki, Taikan; Hanasaki, Naota. (2006). GSWP-2: Multimodel Analysis and Implications for Our Perception of the Land Surface. doi:10.1175/bams-87-10-1381
[7] DOIHagemann, S., Ho-Hagemann, H. T., Hanke, M. (2023). The hydrological discharge model - a river runoff component for offline and coupled model applications (5.2.0). doi:10.5281/zenodo.7890682
[8] DOIGustafsson, Bo G.; Schenk, Frederik; Blenckner, Thorsten; Eilola, Kari; Meier, H. E. Markus; Müller-Karulis, Bärbel; Neumann, Thomas; Ruoho-Airola, Tuija; Savchuk, Oleg P.; Zorita, Eduardo. (2012). Reconstructing the Development of Baltic Sea Eutrophication 1850–2006. doi:10.1007/s13280-012-0318-x