Preliminary look at MARCUS Tilt Corrected Broadband Radiation Data
Poster PDF
Authors
Chuck N. Long (deceased) — NOAA- Earth System Research Laboratory
R. Michael Reynolds — Remote Measurements & Research Company (RMR Co.)
Jim Wendell — NOAA - ESRL, Global Monitoring Division
Heath H Powers — Los Alamos National Laboratory
Category
ARM field campaigns – Results from recent ARM field campaigns
Description
A downwelling broadband radiometer package design similar to that designed for the ARM AAF G-1 aircraft radiation measurements was included in the instrumentation for the shipboard MARCUS campaign. This package includes a standard design Delta-T Devices SPN-1 total and diffuse shortwavw (SW) radiometer, a modified (with no shading pattern) unshaded SPN-1 providing two separate SW measurements, a standard Eppley PIR longwave radiometer, and a VectorNav VN300 navigation data unit. This set of instruments provides all the information that is needed to apply the correction for tilt from horizontal developed by Long et al. (2010) to the downwelling SW measurements, as well as screen the longwave measurements for data likely contaminated by too large tilt. Three of these ARM "ShipRad" systems were built by RMRCO, and subsequently tested and the angular offsets of each radiometer from that system's navigation "level" were determined at NOAA in Boulder, CO. Two ShipRad systems were then deployed on the Australian Antarctic supply vessel Aurora Australis (AA) which routinely travels between Hobart, Australia, Antarctic research stations. Two ShipRads were positioned on the port and starboard forward rails of the bridge roof and the third unit was maintained as a spare unit in case of instrument or system failure. We will present a preliminary sampling and analysis of the broadband radiation data as available from the MARCUS campaign.
