Continuity of NASA Earth Observations from Space A Value Framework (2015) / Chapter Skim
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Appendix F: Full Framework Example: Determining Ice Sheet Mass Balance
Appendix F: Full Framework Example: Determining Ice Sheet Mass Balance
Pages 86-88
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From page 86... ...
. UTILITY A glacier and ice sheet observing system has demonstrated its capability and value to provide modern, consistent, comprehensive estimates of ice sheet mass balance over the last decades, observe rapid glacier changes in Greenland and West Antarctica, and detect instabilities in ice dynamics.
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From page 87... ...
Given the complementarity of the three geophysical variables for achieving the quantified objective, each variable is given the same utility score in this example. QUALITY Satellite radar interferometry shall measure ice motion with a precision of 100 mm at 100 m spatial scale, balanced pole to pole, with a near daily frequency re-visit to observe rapid change in ice dynamics and measure long term trends and spatial patterns in ice mass change.
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From page 88... ...
. Relative to this example quantified Earth science objective, previous experience indicates that laser altimetry, through a combination of satellite and airborne capabilities, will obtain a high-quality measurement that partially meets the quantified objective, whereas the quality of the gravity and ice velocity measurements will largely meet the quantified objective.
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