Monday, 23 January 2012
Effect on Pixel Resolution on Cloud Climatologies From Hi-Res (MODIS) and Lower Res (AVHRR, ISCCP) Data
Hall E (New Orleans Convention Center )
In an effort to extent the Clouds and the Earth's Radiant Energy System (CERES) Climate Data Record (CDR), work is underway to generate CERES like products using Earth Radiation Budget Experiment (ERBE). The satellite broadband instruments map the top-of-atmosphere radiation field with coincident data from satellite narrowband imagers retrieves the properties of clouds associated with those fields. For the CERES dataset, the clouds information is derived from high-resolution (1 km) Moderate Resolution Imaging Spectroradiometer (MODIS). The ERBE dataset uses cloud information from coincident low-resolution (4 km) Advanced Very High Resolution Radiometer (AVHRR). This paper will explore the effect of pixel resolution on cloud climatologies. Such a study is required to ensure consistency between cloud climatologies from hi-resolution (MODIS) and low-resolution (AVHRR, ISCCP) data. This paper presents the results of a sensitivity study of cloud amount, height, particle size, and optical depth to the satellite resolution.