Decadal slowdown of a land-terminating sector of the Greenland Ice Sheet despite warming.


:Ice flow along land-terminating margins of the Greenland Ice Sheet (GIS) varies considerably in response to fluctuating inputs of surface meltwater to the bed of the ice sheet. Such inputs lubricate the ice-bed interface, transiently speeding up the flow of ice. Greater melting results in faster ice motion during summer, but slower motion over the subsequent winter, owing to the evolution of an efficient drainage system that enables water to drain from regions of the ice-sheet bed that have a high basal water pressure. However, the impact of hydrodynamic coupling on ice motion over decadal timescales remains poorly constrained. Here we show that annual ice motion across an 8,000-km(2) land-terminating region of the west GIS margin, extending to 1,100 m above sea level, was 12% slower in 2007-14 compared with 1985-94, despite a 50% increase in surface meltwater production. Our findings suggest that, over these three decades, hydrodynamic coupling in this section of the ablation zone resulted in a net slowdown of ice motion (not a speed-up, as previously postulated). Increases in meltwater production from projected climate warming may therefore further reduce the motion of land-terminating margins of the GIS. Our findings suggest that these sectors of the ice sheet are more resilient to the dynamic impacts of enhanced meltwater production than previously thought.






Tedstone AJ,Nienow PW,Gourmelen N,Dehecq A,Goldberg D,Hanna E




Has Abstract


2015-10-29 00:00:00
















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    pub_type: 杂志文章


    authors: Coen ES,Thoday JM,Dover G

    更新日期:1982-02-18 00:00:00

  • Selective amplification by auto- and cross-catalysis in a replicating peptide system.

    abstract::Self-replication has been demonstrated in synthetic chemical systems based on oligonucleotides, peptides and complementary molecules without natural analogues. However, within a living cell virtually no molecule catalyses its own formation, and the search for chemical systems in which both auto- and cross-catalysis ca...


    pub_type: 杂志文章


    authors: Yao S,Ghosh I,Zutshi R,Chmielewski J

    更新日期:1998-12-03 00:00:00

  • Mobilization of transposons by a mutation abolishing full DNA methylation in Arabidopsis.

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    pub_type: 杂志文章


    authors: Miura A,Yonebayashi S,Watanabe K,Toyama T,Shimada H,Kakutani T

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    pub_type: 杂志文章


    authors: Malewicz B,Borowski E

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    authors: Puglisi JD,Wyatt JR,Tinoco I Jr

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    authors: Koehler KR,Mikosz AM,Molosh AI,Patel D,Hashino E

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    pub_type: 杂志文章


    authors: Sklar R,Strauss B

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    authors: Rockenbach B,Milinski M

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    authors: Bird AG,McLachlan SM,Britton S

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    authors: Smith JM,Dowson CG,Spratt BG

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    pub_type: 杂志文章


    authors: Taniuchi R,Santamaria C,Doornenbal P,Obertelli A,Yoneda K,Authelet G,Baba H,Calvet D,Château F,Corsi A,Delbart A,Gheller JM,Gillibert A,Holt JD,Isobe T,Lapoux V,Matsushita M,Menéndez J,Momiyama S,Motobayashi T,Nii

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    authors: McLellan JS,Marcos S,Prieto PM,Burns SA

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    authors: Heenen M,Galand P

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    authors: Adhya S,Miller W

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    authors: Whalen RG,Sell SM

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    authors: Bina CR,Navrotsky A

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    authors: Alon U,Surette MG,Barkai N,Leibler S

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    authors: Mankoo BS,Collins NS,Ashby P,Grigorieva E,Pevny LH,Candia A,Wright CV,Rigby PW,Pachnis V

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    authors: Aboul-ela F,Murchie AI,Lilley DM

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    authors: Nishimasu H,Ishizu H,Saito K,Fukuhara S,Kamatani MK,Bonnefond L,Matsumoto N,Nishizawa T,Nakanaga K,Aoki J,Ishitani R,Siomi H,Siomi MC,Nureki O

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    pub_type: 杂志文章,评审


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    pub_type: 杂志文章


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    更新日期:2002-03-21 00:00:00