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) a t a variety of locations in northern Oklahoma. Accurate measurements o f solar spectral broadband (0.224-3.91 mu m and 0.68-3.3 mu m) and nar row spectral bandpass (10 nm) downwelling irradiances were made over a tmospheric conditions ranging from ''pristine'' clear to heavy overcas t. Precise instrument calibrations are used during analyses in derivin g absolute downwelling fluxes accurate to about 1% for the broadband a nd 3% for the spectral instruments. Measured instrument angular respon ses are incorporated in these analyses to minimize deviations from ide al cosine responses. All calibrated irradiance measurements are availa ble 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.