Blar i NIVA-rapporter på emneord "Atmosfæriske avsetninger"
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Estimerte bidrag fra atmosfæriske avsetninger til nitrogeninnhold i elver
(NIVA-rapport;7678, Research report, 2021)Hovedmålet med prosjektet har vært å estimere hvor stor andel av nitrogenet i vassdragene som kommer fra langtransporterte forurensninger. Arbeidet må betraktes som et forprosjekt basert på utprøving av en forenklet metodikk ... -
Nitrogen in surface waters: time trends and geographical patterns explained by deposition levels and catchment characteristics
(NIVA-rapport;7728-2022, Research report, 2022)The report presents a statistical analysis of controls (deposition, land cover, climate) on spatial variability and long-term trends (1992-2016) in surface water concentrations of nitrate (NO3) and carbon to nitrogen (C/N) ... -
Re-calibration of the MAGIC model with data from the National Lake Survey 2019.
(NIVA-rapport;7799-2022, Research report, 2022)The MAGIC model (Model for Acidification of Groundwater In Catchments) was calibrated to the Norwegian 1000-lake survey data from both 1995 and 2019. The re-survey in 2019 provided a new point in time for generation of new ... -
Re-calibration of the MAGIC model with data from the National Lake Survey 2019. Results from phase 2
(NIVA-rapport;7915-2023, Research report, 2023)The biogeochemical MAGIC model has been applied to the data from the 1995 and 2019 surveys of 1000 Norwegian lakes. The work is a follow-up of a modelling exercise that was done in 2022, with improved input data and with ...