Surface-based inversions above central Greenland

Surface‐based temperature inversions (SBIs) are studied at Summit Station in central Greenland during the period spanning July 2010 to May 2012. The frequency and intensity of SBI are examined using microwave radiometer (MWR) temperature retrievals, radiosonde profiles, and near‐surface meteorological data. Using the MWRs' high temporal resolution, the diurnal, monthly, and annual cycles are investigated. Monthly mean values in SBI occurrence and intensity show that surface‐based inversions are prevalent in the winter with decreasing values in the summer months. A case study on 20 February 2011 suggests that factors other than solar elevation angle influence the intensity of surface‐based inversions. An increase in liquid water path corresponds to a decrease in SBI intensity, suggesting that liquid‐bearing clouds, especially within the lowest 1 km, are associated with weaker surface‐based inversions. Key points Surface‐based inversions are a dominant feature above the Greenland ice sheet Solar elevation angle affects the diurnal and annual cycle Additional factors affect surface‐based inversions