Enabling continuity of the earth radiation budget climate data record using the Clouds and Earth’s Radiant Energy System (CERES) Flight Model 5 on S-NPP

Shankar, Mohan; Priestley, Kory J.; Smith, N.; Thomas, Susan; Walikainen, Dale R.

doi:10.1117/12.2529527

Cited by 1 publication

(6 citation statements)

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“…Thus, the measurement uncertainty can also be used as a proxy for the spectral responsivity uncertainty. Table A1 (adapted from [6]) shows the spectral responsivity uncertainty (a i ) expressed as a percentage, as a function of the filter center wavelength. It can be seen that the uncertainties are largest at the shorter wavelengths.…”

Section: Discussionmentioning

confidence: 99%

“…The radiometric scaling to the SNPP/FM5 SWc impacts the monthly daytime LW fluxes but does not affect their long-term trends. In looking at the long-term trends of daytime LW global all-sky flux differences between SNPP/FM5 and Aqua/FM3, a trend of 0.53 ± 0.16 Wm −2 /decade was observed [6]. The trends were attributed to the SW portion of the TOTc since it was shown that the flux difference trends for the SW were not statistically significant.…”

Section: Long-term Differencesmentioning

confidence: 97%

“…The radiometric scaling is performed through adjustments to the CERES measurements in the 13 filter bands within their uncertainties. A Lagrange multiplier objective constrained optimization algorithm is used to obtain the solution for the amount of adjustment for each filter band [6]. This algorithm is described below.…”

Section: Radiometric Scaling Through Spectral Response Function Adjustmentsmentioning

confidence: 99%

“…The algorithm described above and data from Table A1 (Appendix B) are used to determine the adjustments necessary in each filter band to obtain the desired global all-sky SW reflectance for SNPP/FM5. The results are tabulated in Table 3 (adapted from [6]). The maximum likelihood solution, x i , is the amount of change necessary in each filter band.…”

Section: Optimal Solution For Swc Srfmentioning

confidence: 99%

“…Table 3. Maximum likelihood solution for the adjustments to the spectral responsivity for each of the 13 filter bands to radiometrically scale the SWc of SNPP/FM5 to Aqua/FM3 for global all-sky using the intercomparison dataset for 2014 (adapted from [6]).…”

Section: Optimal Solution For Swc Srfmentioning

confidence: 99%

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Generation of a Seamless Earth Radiation Budget Climate Data Record: A New Methodology for Placing Overlapping Satellite Instruments on the Same Radiometric Scale

Shankar

Manalo‐Smith

et al. 2020

Remote Sensing

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The Clouds and the Earth’s Radiant Energy System (CERES) instruments have enabled the generation of a multi-decadal Earth radiation budget (ERB) climate data record (CDR) at the top of the Earth’s atmosphere, within the atmosphere, and at the Earth’s surface. Six CERES instruments have been launched over the course of twenty years, starting in 1999. To seamlessly continue the data record into the future, there is a need to radiometrically scale observations from newly launched instruments to observations from the existing data record. In this work, we describe a methodology to place the CERES Flight Model (FM) 5 instrument on the Suomi National Polar-orbiting Partnership (SNPP) spacecraft on the same radiometric scale as the FM3 instrument on the Aqua spacecraft. We determine the required magnitude of radiometric scaling by using spatially and temporally matched observations from these two instruments and describe the process to radiometrically scale SNPP/FM5 to Aqua/FM3 through the instrument spectral response functions. We also present validation results after application of this radiometric scaling and demonstrate the long-term consistency of the SNPP/FM5 record in comparison with the CERES instruments on Aqua and Terra.

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Section: Discussionmentioning

confidence: 99%

Section: Long-term Differencesmentioning

confidence: 97%

Section: Radiometric Scaling Through Spectral Response Function Adjustmentsmentioning

confidence: 99%

Section: Optimal Solution For Swc Srfmentioning

confidence: 99%

Section: Optimal Solution For Swc Srfmentioning

confidence: 99%

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