摘要：The inverse barometer effect (IBE) is the isostatic response of ocean surface height to changes in atmospheric pressure ( P air ) at a rate of about 1 cm hPa −1 . The IBE is a significant contributor to variability of ice-shelf surface elevation ( η ice ), as we demonstrate with simultaneous global positioning system measurements of η ice and local measurements of P air from the Amery, Brunt and Ross Ice Shelves, Antarctica. We find that an IBE correction is justified for frequencies ( ω ) covering the “weather band”, 0.03 < ω < 0.5 cpd (cycles per day). The IBE correction reduces the standard deviation of the weather-band signal of η ice from ∼9 cm to ∼3 cm. With this correction, the largest remaining high-frequency error signal in η ice is the inaccuracy of the present generation of Antarctic tide models, estimated to be of order 10 cm for most of Antarctica.
