Discharge has been measured at three locations. At these locations, measurement weirs have been installed in May 2007 to estimate discharges accurately. A V-notch weir is used to measure the inflow of surface water into the catchment near the Wielse Kade (Qin). Trapezoidal Rossum weirs have been installed to measure outflow (Qout1 and Qout2), of which the stage-discharge relations have been obtained by laboratory calibration. The uncertainty associated with the discharge measurement can be considerable in some cases.

North Sea wind profiles with 10 minute averages measured by the ZephIR 300M wind lidar. Data are daily files reported by the instrument. Locations are the TenneT platforms BSA, BSB, HKZA, HKZB, HKN (operational starting 2019-2023), located within the wind farms BS, HKZ and HKN.

This dataset contains particulate matter mass concentration measurements using a TEOM 1400a sensor unit in combination with Series8500 FDMS monitor. The instrument is located in a Portakabin 500m north from the Cabauw tower.

Dutch Offshore Wind Atlas (DOWA) project - LES-time series at locations in Dutch offshore wind parks. Dissemination of high-resolution (time: 10mins; space: 64x64m) information for Dutch OWFZs (offshore wind farm zones) is a deliverable of the DOWA project. This dataset contains time series with 10 minute averaged wind speed, wind direction, air pressure, relative humidity and temperature from Whiffle's Large Eddie Simulation model GRASP using tendencies constructed from the ECMWF reanalysis ERA5. Wind parks have been included in the LES model for the periods they have been operational. The files with *_fs_* in the file name contain free-stream fields, i.e. without wind parks. The time series contain values at heights from 10 to ca. 600m. The attribute experiment in the NetCDF files indicates the wind park: Borssele (006), Hollandse Kust Noord (101) or Hollandse Kust Zuid (205). More information is available on the DOWA website: www.dutchoffshorewindatlas.nl

Volumetric soil moisture contents have been measured daily between 6 november 2003 and 19 August 2010 with a TDR set-up developed by Heimovaara and Bouten consisting of six arrays of six sensors between 5 and 73 cm below the soil surface. The six arrays were positioned on the perimeter of a circle with a diameter of 9 m with equal distances. The TDR was calibrated by taking 6 undisturbed soil samples (diameter: 20 cm; height: 20 cm) into the lab and comparing independently measured volumetric soil moisture contents to the TDR measurements. Measurements were performed at midnight local time, without taking daylight savings time into account.

Discharge has been measured at three locations. At these locations, measurement weirs have been installed in May 2007 to estimate discharges accurately. A V-notch weir is used to measure the inflow of surface water into the catchment near the Wielse Kade (Qin). Trapezoidal Rossum weirs have been installed to measure outflow (Qout1 and Qout2), of which the stage-discharge relations have been obtained by laboratory calibration. The uncertainty associated with the discharge measurement can be considerable in some cases.

2-dimensional clouddata (IR brightness temp. and cloudmask) and cloudcover (total, high, middle and low) derived from sky brightness temperatures recorded with a scanning pyrometer. For more information about CESAR: https://ruisdael-observatory.nl/cesar/

Degree days are determined by the effective daily mean temperature (Teff). Teff is calculated with the daily mean temperature (TG) and the daily mean windspeed (FG). Teff = TG - 2/3 * FG. Degree days = sum of the days with (max[(14 - Teff),0]).

Dataset contains direct, diffuse, global and downward longwave irradiances at 60 seconds time resolution. Dataset also contains air temperature, relative humidity and air pressure at instrument height. Quantities are identical to the ones found in the Baseline Surface Radiation Network (BSRN) central archive (www.pangaea.de/PHP/BSRN_Status.php). For release guidelines see: www.bsrn.awi.de/en/data/ conditions_of_data_release/details/ .

The BALTEX BRIDGE CAMPAIGN: An integrated approach for a better understanding of clouds. The BBC was performed around a central experimental facility at Cabauw, Netherlands. Cabauw was part of a regional network consisting of 10 remote sensing stations covering a region of 100 km x 100 km in the central Netherlands. Aircraft observations, satellite analysis, and atmospheric modeling were centered around Cabauw. The campaign lasted from 1 August until the end of September 2001. A Microwave Intercomparison Campaign (MICAM) at Cabauw marked the beginning of the campaign. After 2 weeks the microwave radiometers were distributed over the regional network that performed continuous cloud and radiation observations using lidar ceilometers, infrared radiometers, and pyranometers. In situ cloud and radiation measurements by three aircraft and a tethered balloon were performed in September.