Geesje Rotgers's scientific contributions

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Publications (4)

Figure 1: NO3 -(mg/L) measured at all sources and all times. Single...
Figure 4: As in Fig. 3, but for Cl -(mg/L).
Figure 5: As Fig. 3, but for an assumed NO3 -4-year travel time.
Figure 6: As in Fig. 3, but for Cl and an assumed 4-year travel time.
Figure 7: As in Fig. 3, but for an assumed NO3 -11-year travel time.
Briggs, Hanekamp, Rotgers (2023) Nitrogen and Chlorine Changes Through A Netherlands Catchment - A Critique of Kaandorp et al. (2021)
Preprint
Full-text available
  • Jun 2023
We present a simple, superior method for estimating the upstream to downstream differences in nitrate and chlorine in a well studied catchment in the Netherlands, using data from the Water Board in Vechtstromen, from 1985 to 2018, in answer to a paper by Kaandorp et al. (2021). Agricultural sites are mostly downstream; nevertheless, less nitrate, a...
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RvS uitspraken – zes vragen geformuleerd
Thesis
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  • Jan 2023
In dit document leggen ondergetekenden een aantal vragen voor aan de Raad van State (RvS) die betrekking hebben op uitspraken gedaan door dit college omtrent het stikstofbeleid. Deze vragen richten zich specifiek op het verstaan van het programma AERIUS(OPS), het gebruik van kritische depositiewaarden, het gebruik van het voorzorgbeginsel en het ve...
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Figure 1: OPS model predictions of SO 2 (y-axis) against observations...
Figure 2: As in Fig 1, but each model run is shown separately.
Figure 3: The CRPS for the Kincaid data, using various assumed means...
Figure 5: As in Fig. 4, but for the Falster data (NH 3 ).
+1 Figure 8: As in Fig. 7, but for the error score of Prediction minus...
Rebuttal On RIVM's Critique Of Briggs et al. AERIUS/OPS Model Performance
Article
Full-text available
  • Oct 2022
The RIVM responded to our paper“Criticizing AERIUS/OPS model performance”. We rebut those critiques below. In brief: RIVM agrees that OPS performs poorly in the short term, but believes it performs well over long periods. Yet they failed to address our demonstration on how averaging over these longer terms can cause spurious “good results.” That i...
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Figure 9: Same as Fig. 8 but for different local conditions.
Figure 10: Same as Fig. 8 but again for different local conditions.
Figure 11: OPS model predictions and observations of SO 2 g/m 2 (note the
Figure 13: OPS model predictions and observations of SO 2 g/m 2 after cali-
Results of the AERIUS/OPS model for various scenarios. The
Criticizing AERIUS/OPS Model Performance
Article
Full-text available
  • Aug 2022
We investigate the AERIUS/OPS model predictive skill. It has none compared to a simple “mean” model. Skill is the demonstrated superiority of one model over another, given specific verification mea- sures. OPS does not have skill compared to a simple “mean” model, which beats OPS using some measures. Further, the verification measures used are them...
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Citations

... After we published on Research Gate the article "Criticizing AERIUS/OPS model performance" [1], RIVM submitted a critique, or reaction, to our paper on their site. [4]. ...
Reference: Rebuttal On RIVM's Critique Of Briggs et al. AERIUS/OPS Model Performance
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