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The code\'s constant offsets are primary, with JMA Syowa hourly pressure as a sensitivity case.\n- Tide: the deposit\'s tide file is in Syowa local time (UTC+3), and the authors shift it by 2.5 h. That shift is kept for the reproduction; the lag analysis uses UTC.\n- Data gaps are detected from timestamps instead of hard-coded row numbers. This gives identical segments.\n- Speed is differenced with the authors\' schemes at 12 h (forward at GNSS2, centred at GNSS1) and centred at other bandwidths.\n- The paper does not define \"background speed\"; four baselines are declared instead.\n- Event windows come from the paper\'s text. The windows shaded in the authors\' code are reported alongside.\n- Correlations for the grounded boreholes, which the authors show only as a scatter plot, are computed.\n- Rain frequency, air pressure and climate context use independent public records instead of the authors\' extracts." } } } rows { name { value: "hasDiscipline" } } rows { name { value: "Q52120" } } rows { quad { p_iri { } o_iri { prefix_id: 12 } } } rows { name { value: "hasMethodologyDescription" } } rows { quad { p_iri { prefix_id: 9 } o_literal { lex: "Reproduction (authors\' data):\n- Input: the Mendeley deposit (doi:10.17632/8wvtxg53ry.1), downloaded and checked against the repository\'s published SHA-256 checksums, and analysed with new Python code. The authors\' MATLAB scripts serve only as a reference for file formats, constants and conversions.\n- Pre-registration: a tolerance and decision rule for each sub-claim were committed in ANALYSIS_PLAN.md before analysis. Later changes are dated amendments, and every result is labelled pre-registered or post hoc.\n- Pressure: borehole pressures are converted to water level and to a fraction of flotation as in the authors\' code; the paper\'s Eq. 1 is reported alongside.\n- GNSS: positions are projected to UTM zone 37S and smoothed with a Gaussian-kernel local linear regression. This reconstructs the authors\' missing local_regression function, identified by matching the deposited fig3.eps. Horizontal speed is differenced from the smoothed positions. Data gaps are detected from the timestamps and optionally bridged with a not-a-knot cubic spline, as in the authors\' supplementary figure.\n- Speed-up: computed against four declared background-speed baselines (local, campaign median, campaign trend, 7-day running median), at smoothing bandwidths of 1, 3, 6 and 12 h, and compared with speed fluctuations outside the events.\n- Tide: the authors\' BH2203 correlation is repeated, then extended to the grounded boreholes with a 25 h high-pass filter and a lag scan. The clock of the tide file is checked against the IOC record of the same gauge.\n\nReplication (independent data, each test pre-registered before its data were downloaded):\n- Japan Meteorological Agency (JMA) Syowa daily weather summaries for rain frequency, 1990\342\200\2232026, cross-checked against the same station\'s SYNOP reports in NOAA\'s Integrated Surface Database (WMO present-weather codes);\n- JMA hourly station pressure for the borehole correction;\n- JMA daily temperatures, and ERA5 2 m temperature from ECMWF\'s cloud-optimised archive, for the positive degree-day context;\n- passive-microwave melt flags (SSM/I 25 km, AMSR 10 km) and Sentinel-2 NDWI for surface melt;\n- an atmospheric-river catalogue (Favier 2025) for the January event;\n- ITS_LIVE image-pair velocities, to test whether the speed-up can be detected independently.\n\nThe whole pipeline runs with pixi and Snakemake from a fresh checkout, and the GNSS processing is guarded by unit and regression tests." } } } rows { name { value: "hasScopeDescription" } } rows { quad { p_iri { } o_literal { lex: "The claim that surface meltwater reaching the bed accelerated grounded ice at Langhovde Glacier, East Antarctica, in summer 2021/22, tested through the observations it rests on:\n- basal water pressure relative to the flotation level, and its rise during the January 2022 rain and melt event;\n- the size of the speed-up at a grounded and a floating GNSS station during the December 2021 and January 2022 events;\n- uplift of the grounded station and its absence on floating ice;\n- the timing of the pressure and speed peaks;\n- the tidal connection between the bed and the sub-shelf cavity, and the head difference to a borehole below the grounding line;\n- the context that summer 2021/22 was unexceptional, with rare rain and no trend in temperature, positive degree-days or rain frequency.\n\nThe causal mechanism is assessed only through these observations. 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