Return to search

Broadband Solar Irradiances Measured on Fixed and Stabilized Platforms: Comparison of Observations and Their Uncertainties

Over the past 40 years radiative transfer models have consistently under-predicted the amount of solar absorption by clouds. Estimates of the size of this discrepancy at the beginning of its discovery were ~10 W/m^2, but in 1995 jumped to 40-100 W/m^2, which ARESE I was formed to resolve. ARESE I being inconclusive, ARESE II was conducted and further studies brought the estimates back to ~10 W/m^2. Part of the problem lies with the difficulty of obtaining accurate measurements of the absorbed solar insolation as well as constructing models that represent real atmospheric conditions. So after ARESE II was completed an experiment was performed to test the effectiveness of a new technique-the stabilized platform. A pyranomter mounted on a stabilized platform, which kept the instrument on board the Proteus aircraft in the earth's horizontal plane, was used to measure the solar flux. Another pyranomter, mounted on a standard fixed platform, was also aboard the Proteus. Since the observations of the fixed platform have to be corrected for the movements and deformation of the aircraft, there is an additional source of uncertainty. Thus the aim of this study was to determine the flux and absorption uncertainties observed from the fixed and stabilized platforms. The fixed platform flux uncertainties, at 4.4-14.8 W/m^2, were ~1.8 times those of the stabilized platform which were 3.8-8.2 W/m^2. However, the fixed flux uncertainties were not so great as to invalidate the pre-ARESE I and ARESE I studies / A Thesis submitted to the Department of Meteorology in partial fulfillment of the requirements for the degree of Master of Science. / Spring Semester, 2006. / December 5, 2005. / Cloud Absorption Anomaly, Stabilized Platform, Solar Correction Factor / Includes bibliographical references. / Robert Ellingson, Professor Directing Thesis; Paul H. Ruscher, Committee Member; Guosheng Liu, Committee Member.

Identiferoai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_180848
ContributorsMcDowall, Gregory (authoraut), Ellingson, Robert (professor directing thesis), Ruscher, Paul H. (committee member), Liu, Guosheng (committee member), Department of Earth, Ocean and Atmospheric Sciences (degree granting department), Florida State University (degree granting institution)
PublisherFlorida State University, Florida State University
Source SetsFlorida State University
LanguageEnglish, English
Detected LanguageEnglish
TypeText, text
Format1 online resource, computer, application/pdf
RightsThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them.

Page generated in 0.0015 seconds