Surface radiation measurements during the ARESE campaign

We describe a comprehensive set of surface radiative flux measurements made during the Fall 1995 ARM Enhanced Shortwave Experiment (ARESE) at a variety of locations in northern Oklahoma. Accurate measurements of solar spectral broadband (0.224-3.91 mu m and 0.68-3.3 mu m) and narrow spectral bandpass (10 nm) downwelling irradiances were made over atmospheric conditions ranging from "pristine" clear to heavy overcast. Precise instrument calibrations are used during analyses in deriving absolute downwelling fluxes accurate to about 1% for the broadband and 3% for the spectral instruments. Measured instrument angular responses are incorporated in these analyses to minimize deviations from ideal cosine responses. All calibrated irradiance measurements are available through the ARM ARESE archive via anonymous FTP at ftp.arm.gov and the World Wide Web at www.arm.gov. (C) 1998 Elsevier Science Ltd. All rights reserved.