Improved Accuracy in Shipborne Broadband Irradiance Measurements during MARCUS using New Tilt-Corrected SHIPRAD Systems Journal Article uri icon

Overview

abstract

  • Surface broadband shortwave and longwave irradiance are key components; of the surface energy budget and give insight on atmospheric; constituents like clouds and aerosols as well as provide useful; information for model evaluation. Surface irradiance measurements are; particularly difficult to make over the ocean where few measurement; platforms exist, and where the motion of ships and buoys makes the; accuracy of the measurements challenging. During the US DOE ARM; Measurements of Aerosols, Radiation, and Clouds over the Southern Ocean; (MARCUS) field campaign, new shipborne broadband radiation systems; (SHIPRAD) were deployed for the first time to test correction. The; systems include pyrgeometer measurements for measuring longwave; irradiance, an unshaded pyranometer to measure shortwave irradiance, a; navigation system measuring pitch/roll/heading, and an SPN1 shortwave; radiometer that measures direct and diffuse components with no moving; parts. A tilt correction methodology was used to correct 1 second; temporal resolution shortwave irradiance data for ship motion, designed; to correct tilts of 10 degrees or less to within 10 W/m2. Two SHIPRAD; systems were deployed on the port and starboard sides of the ship, and; the measurements were combined in order to be able to eliminate; measurements shaded by ship structures. The new methodology allows for; high-temporal resolution irradiance measurements with higher accuracy.; Results will be presented on the accuracy of the tilt correction; methodology and the irradiance measurement results throughout the; campaign.

publication date

  • January 28, 2020

has restriction

  • closed

Date in CU Experts

  • January 31, 2023 9:41 AM

Full Author List

  • Riihimaki L; Reynolds RM; Long C; Wendell J; Hall E; Cromwell E

author count

  • 6

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