A Revised Magnesium II Core-to-Wing Ratio From SORCE SOLSTICE

Snow, M.; Machol, J.; Viereck, R.; Woods, T.; Weber, M.; Woodraska, D.; Elliott, J.

doi:10.1029/2019EA000652

i

A Revised Magnesium II Core-to-Wing Ratio From SORCE SOLSTICE

2019
By Snow, M. ; Machol, J. ; Viereck, R.
Source Earth and Space Sci. (2019) 6(11): 2106-2114

Details

Journal Title:

Earth and Space Science
Personal Author:

Snow, M. ; Machol, J. ; Viereck, R. ; Woods, T. ; Weber, M. ; Woodraska, D. ; Elliott, J.
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences) ; NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information) ; NWS (National Weather Service) ; SWPC (Space Weather Prediction Center)
Description:

The Magnesium II core‐to‐wing ratio (also known as the Mg II index) is a widely used proxy for ultraviolet solar spectral irradiance variability. We have developed a new algorithm for calculating this index from the SOLar‐STellar Irradiance Comparison Experiment (SOLSTICE) on the SOlar Radiation and Climate Experiment (SORCE). The new method uses weighted sums of the core and wing regions of the spectrum calculated from the daily level three high‐resolution spectrum. We also describe a new method of scaling the results in order to compare to other measurements. This new method scales each data set to a standard spectral resolution rather than scaling to other data sets during periods of overlapping measurements. Finally, we quantify the effect of long‐term instrument degradation on the Mg II index. In the case of SORCE SOLSTICE, using uncorrected data would produce an error of less than 0.6% of the solar cycle amplitude over a decade.
Source:

Earth and Space Sci. (2019) 6(11): 2106-2114
DOI:

https://doi.org/10.1029/2019EA000652
Document Type:

Journal Article
Rights Information:

CC BY
Compliance:

Submitted
Download URL:

https://repository.library.noaa.gov/view/noaa/25163/noaa_25163_DS1.pdf
File Type:

[PDF - 2.00 MB]
Collection(s):

NOAA Cooperative Institutes ; National Environmental Satellite and Data Information Service (NESDIS)
Main Document Checksum:

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