WORCC-PMOD/WRC quality assured aerosol optical depth and Ångström exponent for Ny-Ålesund GAW station (2002- present)

WORCC-PMOD/WRC quality assured aerosol optical depth and Ångström exponent for Ny-Ålesund GAW station (2002- present)

Aerosol optical  depth (AOD) measurements have been performed within the frame of Global Atmospheric Watch Precision Filter Radiometer (GAW-PFR) network in Ny-Ålesund (79N,11E) since 2002.  The measurements are performed from March to October, with PFR (PrecisionFilterRadiometer) instruments provided by Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC). The solar tracker and  infrastructure  are provided by provided by NILU(Norsk institutt for luftforskning) in collaboration with the  Norwegian Polar Institute.

PFR manufactured by PMOD/WRC is a temperature stabilized instrument at 20o C equipped with four narrow band interference filters with nominal centroid wavelengths 368 nm, 412 nm, 500 nm and 862 nm and bandpass (fullwidth half maximum) 4 nm for 368 nm channel and 5 nm for the rest. The instrument is calibrated in yearly bases against the WMO-AOD reference at PMOD/WRC during the polar winter. The operation is done remotely by PMOD/WRC with the installation and onsite maintenance (cleaning, alignment adjustments) done by personnel of Norwegian Polar Institute and NILU in collaboration with PMOD/WRC.

The processing and quality assurance of the data is done following  the  protocols of  World Optical depth Research and Calibration Center (WORCC, PMOD/WRC) (2018), and the data are submitted to the WDCA database (EBAS-NILU) as hourly mean AOD and AE values. This dataset contains the high-resolution data (1 min) cloud screened and quality assured since 2002. The provided Ångström exponent is retrieved from the 4 wavelengths.

SUN_PFR_AOD_AE_V1.0.dat : AOD and AE for the period 2002-2021

Lunar_PFR_AOD_AE_V1.0.dat : AOD and AE for the period 2018-2021

KN:  Calibration, operation, and processing since 2014, WORCC quality assurance protocols, quality assurance of the presented dataset

KS: , WORCC quality assurance protocols, consulting on quality assurance of the presented dataset

WC: calibration, operation, and processing 2002- 2014

NS: operation and processing 2005- 2012

HGH: principal  investigator  of hosting  institute NILU

SK: principal  investigator  of hosting   institute  NILU

Acknowledgement: Special  thanks  the  personnel  of  the  Norwegian Polar Institute  at  Ny-Ålesund for  all  valuable the  technical  support  for  the  solar and  lunar  measurements.

1. Kazadzis, S., Kouremeti, N., Nyeki, S., et al. (2018) The World Optical Depth Research and Calibration Center (WORCC) quality assurance and quality control of GAW-PFR AOD measurements 10.5194/gi-7-39-2018 https://gi.copernicus.org/articles/7/39/2018/