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Unabated global mean sea-level rise over the satellite altimeter era -…
Unabated global mean sea-level rise over the satellite altimeter era
Bias Corrections
Correcting biases initiated in measuring sea level changes
Previous GMSL rise estimates were incorrect because of systematic drifts
GMSL rate reducted to about 2.6±0.4 mm/yr compared to 3.2±0.4mm/yr
Study provides adjusted estimates of sea level rise
Figure 3
Precise measurements are necessary
Altimeters detect sea level by reflecting radar off the ocean's surface
60 day low pass butterworth filter was applied to give clear long term trends
Uncertaintiy Analysis involved calibration differences from the satellite missions
Satellites TOPEX/Poseidon, Jason-1, Jason-2 provide data
Corrections
Study used a edited data strategy to rearrange tide gauge data that was ineffective
Proposed new method of GPS use to correct altimeter data
This could improve the effectiveness of estimates
Vertical Land Movement (VLM)
GPS measurements provide data on Vertical Land Movement
adjustments to VLM with GPS data
Geophysical processes analyzed
Methods for dealing with the biases need to be improved
Future monitoring could be improved with better altimeter records