[en] We revisit the input–output mass budget of the high-elevation region of the Greenland ice
sheet evaluated by the Program for Arctic Regional Climate Assessment (PARCA). Our revised reference period (1961–90) mass balance of 54 48 Gt a–1 is substantially greater than the 0 21 Gt a–1 assessed by PARCA, but consistent with a recent, fully independent, input–output estimate of high-elevation mass balance (41 61 Gt a–1). Together these estimates infer a reference period high-elevation specific mass balance of 4.8 5.4 cm w.e. a–1. The probability density function (PDF) associated with this combined input–output estimate infers an 81% likelihood of high-elevation specific mass balance being positive (>0 cm w.e. a–1) during the reference period, and a 70% likelihood that specific balance was >2 cm w.e. a–1. Given that reference period accumulation is characteristic of centurial and millennial means, and that in situ mass-balance observations exhibit a dependence on surface slope rather than surface mass balance, we suggest that millennial-scale ice dynamics are the primary driver of subtle
reference period high-elevation mass gain. Failure to acknowledge subtle reference period dynamic mass gain can result in underestimating recent dynamic mass loss by 17%, and recent total Greenland mass loss by 7%.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Colgan, W.
Box, J.
Andersen, M.
Fettweis, Xavier ; Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Csatho, B.
Fausto, R.
van As, D.
Wahr, J.
Language :
English
Title :
Greenland high-elevation mass balance: inference and implication of reference period (1961–90) imbalance
Publication date :
19 March 2015
Journal title :
Annals of Glaciology
ISSN :
0260-3055
eISSN :
1727-5644
Publisher :
International Glaciological Society, Cambridge, United Kingdom
Volume :
56
Issue :
70
Pages :
105–117
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Ahlstrøm AP and the PROMICE project team (2008) A new programme for monitoring the mass loss of the Greenland ice sheet. In Bennike O and Higgins AK eds. Review of survey activities 2007. (Geological Survey of Denmark and Greenland Bulletin 15) GEUS, Copenhagen
Andersen KK and 6 others (2006) Retrieving a common accumulation record from Greenland ice cores for the past 1800 years. J. Geophys. Res., 111(D15), D15106 (doi: 10.1029/2005JD006765)
Andersen ML and 10 others (2015) Basin-scale partitioning of Greenland ice sheet mass balance components (2007-2011). Earth Planet. Sci. Lett., 409, 89-95 (doi: 10.1016/j.epsl.2014.10.015)
Bales RC and 8 others (2009) Annual accumulation for Greenland updated using ice core data developed during 2000-2006 and analysis of daily coastal meteorological data. J. Geophys. Res., 114(D6), D06301 (doi: 10.1029/2008JD010600)
Bamber JL and 10 others (2013) A new bed elevation dataset for Greenland. Cryosphere, 7(2), 499-510 (doi: 10.5194/tc-7-499-2013)
Box JE and Colgan W (2013) Greenland ice sheet mass balance reconstruction. Part III: Marine ice loss and total mass balance (1840-2010). J. Climate, 26(18), 6990-7002 (doi: 10.1175/JCLI-D-12-00546.1)
Box JE and 10 others (2013) Greenland ice sheet mass balance reconstruction. Part I: net snow accumulation (1600-2009). J. Climate, 26(11), 3919-3934 (doi: 10.1175/JCLI-D-12-00373.1)
Bromwich DH, Nicolas JP and Monaghan AJ (2011) An assessment of precipitation changes over Antarctica and the Southern Ocean since 1989 in contemporary global r eanalyses. J. Climate, 24(6), 4189-4209 (doi: 10.1175/2011JCLI4074.1)
Buchardt SL, Clausen HB, Vinther BM and Dahl-Jensen D (2012) Investigating the past and recent δ18O-accumulation relationship seen in Greenland ice cores. Climate Past, 8(6), 2053-2059 (doi: 10.5194/cp-8-2053-2012)
Cazenave A and Llovel W (2010) Contemporary sea level rise. Annu. Rev. Mar. Sci., 2, 145-173 (doi: 10.1146/annurevmarine-120308-081105)
Cogley JG (2004) Greenland accumulation: an error model. J. Geophys. Res., 109(D18), D18101 (doi: 10.1029/2003JD004449)
Colgan W, Davis J and Sharp M (2008) Is the high-elevation region of the Devon Ice Cap thickening? J. Glaciol., 54(186), 428-436 (doi: 10.3189/002214308785837084)
Colgan W and 7 others (2014) Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic. Cryos. Discuss., 8(1), 537-580 (doi: 10.5194/tcd-8-537-2014)
Compo GP and 26 others (2011) The Twentieth Century Reanalysis Project. Q. J. R. Meteorol. Soc., 137(654), 1-28 (doi: 10.1002/qj.776)
Csathó BM and 9 others (2014) Laser altimetry reveals complex pattern of Greenland Ice Sheet dynamics. Proc. Natl Acad. Sci. USA (PNAS), 11(52), 18 478-18 483 (doi: 10.1073/pnas.1411680112)
Dee DP and 35 others (2011) The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Q. J. R. Meteorol. Soc., 137(656), 553-597 (doi: 10.1002/qj.828)
Doyle SH and 6 others (2014) Persistent flow acceleration within the interior of the Greenland ice sheet. Geophys. Res. Lett., 41(3), 899-905 (doi: 10.1002/2013GL058933)
Enderlin EM, Howat IM, Jeong S, Noh M-J, Van Angelen JH and Van den Broeke MR (2014) An improved mass budget for the Greenland ice sheet. Geophys. Res. Lett., 41(3), 866-872 (doi: 10.1002/2013GL059010)
Ettema J and 6 others (2009) Higher surface mass balance of the Greenland ice sheet revealed by high-resolution climate modeling. Geophys. Res. Lett., 36(12), L12501 (doi: 10.1029/2009GL038110)
Fettweis X and 6 others (2013) Estimating the Greenland ice sheet surface mass balance contribution to future sea level rise using the regional atmospheric climate model MAR. Cryosphere, 7(2), 469-489 (doi: 10.5194/tc-7-469-2013)
Hamilton GS and Whillans I (2002) Local rates of ice-sheet thickness change in Greenland. Ann. Glaciol., 35, 79-83 (doi: 10.3189/172756402781817383)
Huss M (2013) Density assumptions for converting geodetic glacier volume change to mass change. Cryosphere, 7(3), 877-887 (doi: 10.5194/tc-7-877-2013)
Huss M, Bauder A, Funk M and Hock R (2008) Determination of the seasonal mass balance of four Alpine glaciers since 1865. J. Geophys. Res., 113(F1), F01015 (doi: 10.1029/2007JF000803)
Huybrechts P (1994) The present evolution of the Greenland ice sheet: an assessment by modelling. Global Planet. Change, 9(1-2), 39-51
Jacob T, Wahr J, Pfeffer WT and Swenson S (2012) Recent contributions of glaciers and ice caps to sea level rise. Nature, 482(7386), 514-518 (doi: 10.1038/nature10847)
Jezek KC (2012) Surface elevation and velocity changes on the south-central Greenland ice sheet: 1980-2011. J. Glaciol., 58(212), 1201-1211 (doi: 10.3189/2012JoG12J031)
Joughin I, Smith BE, Howat IM, Scambos T and Moon T (2010) Greenland flow variability from ice-sheet-wide velocity mapping. J. Glaciol., 56(197), 415-430 (doi: 10.3189/002214310792447734)
Kalnay E and 21 others (1996) The NCEP/NCAR 40-year reanalysis project. Bull. Am. Meteorol. Soc., 77(3), 437-471 (doi: 10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2)
Khan SA and 12 others (2014) Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming. Nature Climate Change, 4(4), 292-299 (doi: 10.1038/nclimate2161)
Krabill WB and 9 others (2000) Greenland ice sheet: high-elevation balance and peripheral thinning. Science, 289(5478), 428-430 (doi: 10.1126/science.289.5478.428)
Luthcke SB and 8 others (2006) Recent Greenland ice mass loss by drainage system from satellite gravity observations. Science, 314(5803), 1286-1289 (doi: 10.1126/science.1130776)
Luthcke SB, Sabaka TJ, Loomis BD, Arendt A, McCarthy JJ and Camp J (2013) Antarctica, Greenland and Gulf of Alaska landice evolution from an iterated GRACE global mascon solution. J. Glaciol., 59(216), 613-631 (doi: 10.3189/2013JoG12J147)
Morris EM and Wingham DJ (2011) The effect of fluctuations in surface density, accumulation and compaction on elevation change rates along the EGIG line, central Greenland. J. Glaciol., 57(203), 416-430 (doi: 10.3189/002214311796905613)
Reeh N (1985) Was the Greenland ice sheet thinner in the Late Wisconsinan than now? Nature, 317(6040), 797-799 (doi: 10.1038/317797a0)
Reeh N and Gundestrup NS (1985) Mass balance of the Greenland ice sheet at Dye 3. J. Glaciol., 31(108), 198-200
Rignot E, Box JE, Burgess E and Hanna E (2008) Mass balance of the Greenland ice sheet from 1958 to 2007. Geophys. Res. Lett., 35(20), L20502 (doi: 10.1029/2008GL035417)
Schrama EJO and Wouters B (2011) Revisiting Greenland ice sheet mass loss observed by GRACE. J. Geophys. Res., 116(B2), B02407 (doi: 10.1029/2009JB006847)
Shepherd A and 46 others (2012) A reconciled estimate of ice-sheet mass balance. Science, 338(6111), 1183-1189 (doi: 10.1126/science.1228102)
Sørensen LS and 7 others (2011) Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - the impact of interpolation, sampling and firn density. Cryosphere, 5(1), 173-186 (doi: 10.5194/tc-5-173-2011)
Thomas R and 6 others (2000) Mass balance of the Greenland ice sheet at high elevations. Science, 289(5478), 426-428 (doi: 10.1126/science.289.5478.426)
Thomas R and 7 others (2001) Mass balance of higher-elevation parts of the Greenland ice sheet. J. Geophys. Res., 106(D24), 33 707-33 716 (doi: 10.1029/2001JD900033)
Uppala SM and 45 others (2005) The ERA-40 re-analysis. Q. J. R. Meteorol. Soc., 131(612), 2961-3212 (doi: 10.1256/qj.04.176)
Van den Broeke M and 8 others (2009) Partitioning recent Greenland mass loss. Science, 326(5955), 984-986 (doi: 10.1126/science.1178176)
Van de Wal RSW, Boot W, Smeets CJPP, Snellen H, Van den Broeke MR and Oerlemans J (2012) Twenty-one years of mass balance observations along the K-transect, West Greenland. Earth Syst. Sci. Data, 4(1), 31-35 (doi: 10.5194/essd-4-31-2012)
Vaughan DG and 13 others (2013) Observations: cryosphere. In Stocker TF and 9 others eds. Climate change 2013: the physical science basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge and New York
Vernon CL and 6 others (2013) Surface mass balance model intercomparison for the Greenland ice sheet. Cryosphere, 7(2), 599-614 (doi: 10.5194/tc-7-599-2013)
Wouters B, Chambers D and Schrama EJO (2008) GRACE observes small-scale mass loss in Greenland. Geophys. Res. Lett., 35(2), L20501 (doi: 10.1029/2008GL034816)
Zwally HJ and 11 others (2011) Greenland ice sheet mass balance: distribution of increased mass loss with climate warming; 2003-07 versus 1992-2002. J. Glaciol., 57(201), 88-102 (doi: 10.3189/002214311795306682)
Zwally HJ, Giovinetto MB, Beckley MA and Saba JL (2012) Antarctic and Greenland drainage systems. GSFC Cryospheric Sciences Laboratory, Greenbelt, MD http://icesat4.gsfc.nasa.gov/cryo-data/ant-grn-drainage-systems.php