Acceleration of the Contribution of the Greenland and Antarctic Ice Sheets to Sea Level Rise

• p. 2 Introduction, para [3]

  we present a 20‐year record of monthly ice sheet

• p. 5 Results, para [15]

  validates the 18‐year MBM

• p. 5 Conclusions, para [20]

  Using the two‐decade long MBM observation

• p. 2 Introduction, paragraph [3]

  we present a 20‐year record of monthly ice sheet mass balance

Judge's note: Read all the quoted passages on pages 2, 4 and 5; each is as quoted. The figures and para [15] give the period as 1992–2009, which is 18 years. '20-year' and 'two-decade' are loose descriptions of the same record. This is a wording inconsistency and does not affect any number.

Second check: another model agreed

• p. 5 Results, paragraph [15]

  records over the last 8 years validates

• p. 2 Introduction, paragraph [3]

  during the last 8 years

• p. 4 Results, paragraph [12]

  for the common time period 2002.9 to 2009.5

Judge's note: Read page 4 and 5 images and the text of page 2. Para [8] gives the GRACE data span as April 2002 to June 2010 (about 8.2 years) and para [9] says the filtering is not applied on the first and last 6 months, so '8 years' loosely describes the raw GRACE series while the stated comparison window is 6.6 years. A loose round description rather than an error of substance; either form could be defended, hence observation.

Second check: another model agreed

• p. 4 Results, para [10]

  comparable, but the absolute values are 3–4 times larger in

• p. 3 Figure 1a and 1b, y-axes

  Greenland SMB and D* (Gt/yr)

Only the authors can say what is right here.

Judge's note: Read off the Figure 1 panels on the page 3 image, by eye. Greenland SMB runs from about 150 to about 700 Gt/yr on an axis of 100–700; Antarctic SMB from about 1820 to about 2430 Gt/yr on an axis of 1800–2400. The two ranges are of similar absolute size, and as a share of mean SMB the Greenland swings are much the larger. The authors may mean a statistic that is not plotted, or the size of SMB itself, so this is a question about what '3–4 times larger' refers to. The ranges in the arithmetic are figure readings, not printed values.

Second check: another model agreed

• p. 5 Discussion, para [19]

  starting at 500 Gt/yr in 2008

• p. 5 Discussion, para [16]

  In year 2006, the total ice sheet loss was 475 ± 158 Gt/yr (regression line in Figure 2c)

Only the authors can say what is right here.

Judge's note: Read page 5 image. Paras [16] and [19] print the values as quoted. 475 + 2*36.3 = 547.6 Gt/yr for 2008, against the stated 500; 500 is inside the ±158 uncertainty and may be a deliberately round starting value, but the paper does not say so. The same sentence uses 36.5 Gt/yr2 where the abstract, para [15], [16], [19] (first sentence), [20] and Figure 2c all give 36.3. The 56 cm result does follow from the stated inputs (about 200,468 Gt, roughly 55 cm at 362 Gt per mm, the conversion being outside the paper). No explanation of the 500 or the 36.5 found in the article text.

Second check: another model agreed

• p. 1

  availalbe at https://creativecommons.org/licenses/by/4.0/

Judge's note: Read on the page 1 image. The misspelling is there as quoted. Page 1 is the eScholarship cover sheet added by the repository, not part of the journal article, so the error is the repository's and not the authors'.

Second check: none (judge only)

• p. 2 Introduction, para [3]

  budget method (MB) and the gravity method

• p. 2 Introduction, para [3], next sentence

  The MBM compares the surface mass balance

• p. 2 Introduction [3]

  the mass budget method (MB)

• p. 2 Introduction, para [3]

  the mass budget method (MB) and the gravity method

Judge's note: Read para [3] on page 2: '(MB)' is followed directly by 'The MBM compares'. 'MB' is not used again anywhere in the text; the Figure 2 caption has 'Mass Budget Method (MBM)'. The definition has dropped a letter.

Second check: none (judge only)

• p. 2 Introduction, para [2]

  Ramilien et al., 2006

• p. 6 References

  Ramilien, G., et al. (2006)

• p. 6 References

  Ramilien, G., et al. (2006), Interannual variations

Only the authors can say what is right here.

Judge's note: Rests on outside knowledge: that the first author of the 2006 Global and Planetary Change paper (53, 198–208) spells the surname Ramillien, with a double l. The paper prints 'Ramilien' in both places (pages 2 and 6), so it is internally consistent and the spelling cannot be checked from the files.

Second check: none (judge only)

• p. 4 Figure 2 caption

  (a) Greenland; (b) Antarctica; and c)

• p. 4 Figure 2 caption

  and c) the sum of Greenland and Antarctica

Judge's note: Read the caption on the page 4 image: '(a)' and '(b)' have both parentheses, 'c)' has only the closing one.

Second check: none (judge only)

• p. 5 Discussion, para [17]

  yet still maintains above its

Judge's note: Read page 5 image, left column, para [17]. The text is printed as quoted. Cosmetic; meaning is recoverable.

Second check: none (judge only)

• p. 6 References, Ivins et al.

  A. Rlke (2011)

• p. 6 Reference list, Ivins et al. (2011)

  A. Rlke (2011), On‐land ice loss

• p. 6 References, Ivins et al. (2011)

  A. Rlke (2011), On‐land ice loss and glacial isostatic adjustment at the

Only the authors can say what is right here.

Judge's note: Rests on outside knowledge: that the co-author's surname is Rülke. The page 6 image and the crop both show "A. Rlke (2011)" in print, so this is not a text-layer loss; a dropped 'ü' in typesetting is the obvious cause, and 'Rlke' is not a plausible surname as printed.

Second check: none (judge only)

• p. 6 References

  Joughin, I., W. Abdalati, and M. Fahnestock (2004), Large fluctuations in

• p. 6 References

  Joughin, I., W. Abdalati, and M. Fahnestock (2004), Large fluctuations in speed on Jakobshavn Isbræ

Judge's note: Read the full article text (pages 2-6) and the page 6 image. 'Joughin' occurs only in this reference entry and as a co-author in the Howat et al. (2007) entry; no 'Joughin et al., 2004' citation appears in the abstract, body or figure captions. The Jakobshavn and seasonal-variability statements cite Howat et al. 2007, Luckman and Murray 2005 and Pritchard et al. 2009. Harmless to content.

Second check: none (judge only)

• p. 6 References, Velicogna and Wahr (2006)

  Measurements of time variable gravity

Only the authors can say what is right here.

Judge's note: Rests on outside knowledge: that the published title is 'Measurements of Time-Variable Gravity Show Mass Loss in Antarctica'. The page 6 image shows the entry as quoted, with 'Measurements ... shows'; the subject-verb disagreement is visible on the page, but whether the entry misquotes the original title can only be settled against the Science article.

Second check: none (judge only)