This year, a light version of the Ruisdael Science Day took place along the NAC 2021 Conference. The NAC (Nederlands Aardwetenschappelijk Congres) Conference brings together all fields of research within the Earth Sciences. Due to the Covid-19 pandemic situation, this years’ conference was an online event on the 8th and 9th of April 2021. During the first day of the event one of the parallel sessions was devoted to Ruisdael Observatory. The aim of the yearly Ruisdael Science Day is to bring together scientists who work within the framework of the Ruisdael project or related science projects in order to stimulate cooperation between the various disciplines that are represented within Ruisdael Observatory.
The following oral presentations were held during this session:
| Researcher | Institute | Title contribution |
| Wouter Mol | WUR | Record high solar irradiance in Western Europe during first COVID-19 lockdown largely due to unusual weather |
| Katharina Heimerl | VU | Remote sensing of trace gases and aerosols on a mobile trailer for the Ruisdael Observatory |
| Diego Alves Gouveia | KNMI | Caeli Raman lidar observations in Cabauw during TROLIX’19 and COVID-19 campaigns |
| Peng Yao | RUG/CIO | High light absorption capacity of brown carbon aerosol in the Netherlands |
| Jordi Vila-Guerau de Arellano | WUR | Impact of future warming and enhanced CO2 on the vegetation-cloud interaction |
Links to poster presentations are provided in the table below:
| Researcher | Institute | Title poster |
| Marco de Bruine | UU/KNMI | Simulating emission and transport of pollution on 100-meter resolution in a 100-kilometer domain |
| Ulrike Dusek | UoG | The aerosol-cloud infrastructure at the Lutjewad field station |
| Sylvia Walter | UU | MEMO2: MEthane goes Mobile– MEasurements and MOdelling |
| Apituley | KNMI | The role of Cabauw in Ruisdael Observatory |
| Steven Knoop | KNMI | Doppler wind lidar activities at Ruisdael Observatory, station Cabauw |
| Xinya Liu | UoG | Modelling of Aerosol optical profiles based on ground sampling and comparison with Caeli Multi-Wavelength Raman Lidar |
