1. BSRN Station Cabauw and some other stuff Wouter Knap & Cor van Oort KNMI, The Netherlands IPC-XII Davos, September/October 2015

2. Baseline Surface Radiation Network (BSRN)

3. IPC-XII Davos, September/October 2015 BSRN Cabauw, Netherlands

4. IPC-XII Davos, September/October 2015 Process From instrument to archive Instrument Hardware (DAQ) Software (processing) Archive AWI Pyranometer Pyrheliometer Pyrgeometer Sun tracker … Backup Administration - Calibrations - Instr. changes - Exceptions Quality control Submit file … DAQ units Com server Computer … cabmmyy.dat.gz Fully automated 1 day -1

5. IPC-XII Davos, September/October 2015 Process Core: Web Server and Data Base JOB DAILY LINUX WGET WEB SERVER (IIS) ISAPI (dll) delphi FTP SERVER SUBMIT DATA DAQ & STORAGE BACK UP DATABASE Exceptions Administration Processed data MSSQL server Web Server (Microsoft environment) IIS: Internet Information Services (Windows NT) ISAPI: Internet Server Application Programming Interface Delphi: object-oriented Pascal Database Microsoft SQL (Structured Query Language) Server

6. IPC-XII Davos, September/October 2015 Process From instrument to archive APPLICATION DELPHI JOB DAILY LINUX WGET WEB SERVER (IIS) ISAPI (dll) delphi EXCEPTION HANDLING IE Addon delphi FTP SERVER SUBMIT DATA DAQ & STORAGE BACK UP DATABASE Exceptions Administration Processed data MSSQL server HTTP request

7. Administration: Exception Handling Example: cleaning event 25 th August 2014 (quicklook: www.knmi.nl/bsrn)www.knmi.nl/bsrn IPC-XII Davos, September/October 2015

8. Exception handling: IE Plugin (Delphi) Administration: exceptions database IPC-XII Davos, September/October 2015 - LR0100, LR 0300 - CMP - Redundant instr. (!) -999 DB

9. Exception handling Administration: exceptions database IPC-XII Davos, September/October 2015

10. Exception handling Administration: exceptions database IPC-XII Davos, September/October 2015 Zoom in to second data

11. Exception handling Administration: events in database (example: instrument replacement) IPC-XII Davos, September/October 2015

12. Exception handling IPC-XII Davos, September/October 2015 Administration: events in database (example: bird)

13. Handling calibrations IPC-XII Davos, September/October 2015 Administration: calibrations database

14. Quality control IPC-XII Davos, September/October 2015 Step 1: Visual inspection of monthly overviews.

15. Quality control IPC-XII Davos, September/October 2015 Step 2: Final inspection of submit file. (IDL program and cron job to produce figs).

16. IPC-XII Davos, September/October 2015 Daily e-mail with QR

17. IPC-XII Davos, September/October 2015 Monthly quality overview

18. IPC-XII Davos, September/October 2015 Monthly quality overview

19. IPC-XII Davos, September/October 2015 Long & Dutton v2.0 Monthly quality overview: ERL and PPL limits (L&D)

20. IPC-XII Davos, September/October 2015 Summary  Process is fully automated  Administration/QC done on semi-daily basis  Exceptions, calibrations, instrument changes in database DB Status Cabauw  128 station-to-archive files (Feb 2005 – Aug 2014)  USR and UL added to LR0300 (Jan 2013 / Mar 2008)  DL 2005 – 2011 still to be corrected (3 – 4 W/m 2 )

21. IPC-XII Davos, September/October 2015 Meteorologica, 2, 20-23, 2015

22. IPC-XII Davos, September/October 2015 Meteorologica, 2, 20-23, 2015

23. IPC-XII Davos, September/October 2015 Trends?? 10 years BSRN SW: no trend (!) LW: ?? -> calibration issue

24. IPC-XII Davos, September/October 2015 Pyrgeometers at BSRN Cabauw 3 K&Z CG4 - s/n 020611: reduced sensitivity (BSRN: 2005 – 2011) - s/n 040736: standard pyrgeometer (BSRN: 2011 – now) - S1 is special with non-standard dome * Calibrations: 2003, 2006, 2008, 2012 Nighttime comparisons (only BSRN DL is shaded) * Appl Opt. 2007 Oct 20;46(30):7419-25.

25. IPC-XII Davos, September/October 2015 Downward longwave irradiance is calculated according to: Pyrgeometers at BSRN Cabauw

26. IPC-XII Davos, September/October 2015 1a (020611 K&Z 2003) – 2 (040736 PMOD 2006) Period: 2005 – 2011/11 1 data point = nightly average DL BSRN Cabauw: 2 pyrgeometers

27. IPC-XII Davos, September/October 2015 DL BSRN Cabauw Bias: 0.13 ± 1.52 W/m 2 Bias: 3.85 ± 1.48 W/m 2 Calibrations: K&Z – PMOD Calibrations: PMOD – PMOD

28. IPC-XII Davos, September/October 2015 Consequences & action for BSRN Calibration: K&Z > WISG, bias = 3.85 W/m 2 Backward application of 2012 PMOD calibration of CG4 020611 removes the bias and is consistent with S1 (2008 PMOD calibration). Action: application of 2012 calibration to 020611 (2005 – 2011) 20052015 3.85 0 3 November 2011 CG4 020611 K&Z 2003 CG4 040736 K&Z 2006 BSRN DL bias (W/m 2 )

29. IPC-XII Davos, September/October 2015 Other stuff: Langley calibrations (Fred) SW closure (Carlo)

30. IPC-XII Davos, September/October 2015 Sunphotometer calibration at JFJ, 3580 m a.s.l. (2003)

31. IPC-XII Davos, September/October 2015 Sunphotometer: SPUV, 368 nm Langley calibrations 1997 - 2014 Langley cal Cabauw Langley cal JFJ __ Polynomial fit

32. IPC-XII Davos, September/October 2015 Wang, P., W. H. Knap, P. Kuipers Munneke, and P. Stammes (2009), Clear-sky shortwave radiative closure for the Cabauw Baseline Surface Radiation Network site, Netherlands, J. Geophys. Res., 114, D14206, doi:10.1029/2009JD011978. Clear-sky closure

33. IPC-XII Davos, September/October 2015 Wang, P., W. H. Knap, P. Kuipers Munneke, and P. Stammes (2009), Clear-sky shortwave radiative closure for the Cabauw Baseline Surface Radiation Network site, Netherlands, J. Geophys. Res., 114, D14206, doi:10.1029/2009JD011978. Clear-sky closure