Continuity of NASA Earth Observations from Space A Value Framework (2015) / Chapter Skim
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Appendix B: Quality Metric Examples Using Current Climate Data Records
Appendix B: Quality Metric Examples Using Current Climate Data Records
Pages 65-70
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From page 65... ...
For the quality metric examples shown below the primary quantity controlling the time to detect climate change is the natural variability level in the record and its magnitude relative to long term trends, and to uncertainty analysis of the climate record. Interannual to decade scale natural variability tends to be large for most climate records and the differences in climate data records do not significantly change the natural variability estimate from the record.
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From page 66... ...
that converts delay in the time to detect climate trends versus a perfect observing system (Δt − ΔtP) into a quality metric scale of 0 to 1 for use in the value framework.
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From page 67... ...
The lines, which are linear fits to the annual mean values, have different slopes which indicate that the repeatability of the 35-year TSI record is no better than 0.01 W m−2 per year. Shown in the bottom panels are the residuals of the two time series in the upper panel from the linear trends, which indicate "natural" TSI solar cycle variations in the two records.
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From page 68... ...
observations, with different techniques for assessing long-term changes in each of multiple instruments flown on a sequence of satellites. The smooth curves through the annual mean values are estimates of the combined influence of anthropogenic chlorofluorcarbons and greenhouse gases, derived from statistical regression models of the monthly ozone data sets (Lean, 2014)
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From page 69... ...
The residuals of the annual global middle troposphere temperature from the trends, shown in the bottom panel, are indicative of "natural" variability due to various influences including solar irradiance changes, volcanic eruptions and El Niño southern oscillation. The magnitude of this variability, estimated by the 1s standard deviations of the residuals (given by sdev in the figures)
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From page 70... ...
global sea level. Shown in the upper panels are annual mean values of deseasonalized Arctic Sea Ice area (left)
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