Abstract
Abstract. The World Optical Depth Research Calibration Center (WORCC) is a section within the World Radiation Center at Physikalisches-Meteorologisches Observatorium (PMOD/WRC), Davos, Switzerland, established after the recommendations of the World Meteorological Organization for calibration of aerosol optical depth (AOD)-related Sun photometers. WORCC is mandated to develop new methods for instrument calibration, to initiate homogenization activities among different AOD networks and to run a network (GAW-PFR) of Sun photometers. In this work we describe the calibration hierarchy and methods used under WORCC and the basic procedures, tests and processing techniques in order to ensure the quality assurance and quality control of the AOD-retrieved data.
Highlights
Aerosols in the atmosphere, through direct and indirect effects, mainly result in a cooling contribution to the global radiation balance (IPCC, 2013)
In this work we describe the calibration hierarchy and methods used under World Optical Depth Research Calibration Center (WORCC) and the basic procedures, tests and processing techniques in order to ensure the quality assurance and quality control of the aerosol optical depth (AOD)-retrieved data
We present the research activities of WORCC and the calibration hierarchy, the quality assurance and quality control of the Global Atmosphere Watch (GAW)-precision filter radiometers (PFRs) network AOD measurements
Summary
Through direct and indirect effects, mainly result in a cooling contribution to the global radiation balance (IPCC, 2013). Several studies using data from the GAW-PFR network have been published mainly focusing on long-term changes in AOD (e.g., Ruckstuhl et al, 2008; Nyeki et al, 2012, 2015). In addition to these studies, GAWPFR aims to provide intercomparison information between networks by overlapping at selected sites. We present the research activities of WORCC and the calibration hierarchy, the quality assurance and quality control of the GAW-PFR network AOD measurements. We summarize the calibration procedures and hierarchy since the GAW-PFR network was established 17 years ago and the quality assurance and control of the data that the instruments provide
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