GRACE and ICESat Antarctic mass-balance differences are resolved utilizing their dependencies on corrections for changes in mass and volume of the same underlying mantle material forced by ice-loading changes. Modeled gravimetry corrections are 5.22 times altimetry corrections over East Antarctica (EA) and 4.51 times over West Antarctica (WA), with inferred mantle densities 4.75 and 4.11 g cm−3. Derived sensitivities (Sg, Sa) to bedrock motion enable calculation of motion (δB0) needed to equalize GRACE and ICESat mass changes during 2003–08. For EA, δB0 is −2.2 mm a−1 subsidence with mass matching at 150 Gt a−1, inland WA is −3.5 mm a−1 at 66 Gt a−1, and coastal WA is only −0.35 mm a−1 at −95 Gt a−1. WA subsidence is attributed to low mantle viscosity with faster responses to post-LGM deglaciation and to ice growth during Holocene grounding-line readvance. EA subsidence is attributed to Holocene dynamic thickening. With Antarctic Peninsula loss of −26 Gt a−1, the Antarctic total gain is 95 ± 25 Gt a−1 during 2003–08, compared to 144 ± 61 Gt a−1 from ERS1/2 during 1992–2001. Beginning in 2009, large increases in coastal WA dynamic losses overcame long-term EA and inland WA gains bringing Antarctica close to balance at −12 ± 64 Gt a−1 by 2012–16.

中文翻译：

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1992-2016 年南极冰盖的质量平衡：GRACE 重力测量与 ICESat、ERS1/2 和 Envisat 测高的核对结果

GRACE 和 ICESat 南极质量平衡差异是利用它们对由冰载荷变化所迫使的相同底层地幔物质的质量和体积变化的修正的依赖性来解决的。模拟的重力校正是东南极洲（EA）的5.22倍高度校正和西南极洲（WA）的4.51倍，推断的地幔密度为4.75和4.11 g cm-3. 衍生灵敏度 (小号G,小号一种) 到基岩运动启用运动计算 (δ乙0) 需要平衡 2003-08 年期间的 GRACE 和 ICESat 质量变化。对于 EA，δ乙0为 -2.2 毫米-1150 Gt a 质量匹配的沉降-1, 内陆 WA 为 -3.5 mm a-1在 66 Gt-1，而沿海 WA 仅为 -0.35 mm a-1在 -95 Gt a-1. 西澳沉降归因于低地幔粘度，对 LGM 后冰川消融和全新世接地线重新推进期间的冰生长反应更快。EA沉降归因于全新世动态增厚。南极半岛损失 -26 Gt a-1, 南极总增益为 95 ± 25 Gt a-12003-08 年期间，相比 144 ± 61 Gt a-1从 1992-2001 年的 ERS1/2。从 2009 年开始，沿海 WA 动态损失的大幅增加克服了长期 EA 和内陆 WA 的收益，使南极洲接近于 -12 ± 64 Gt a-1到 2012-16 年。