Tuesday, May 2, 2017

Nature Geoscience contents: May 2017 Volume 10 Number 5 pp326-393

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Nature Geoscience


May 2017 Volume 10, Issue 5

Book and Arts
News and Views

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Where credit is due   p323
Authors of research manuscripts should be aware of their authorship, have read the paper and agree with it. What else is required for co-authorship — and what merits only a mention in the acknowledgements — is less clear.



Save northern high-latitude catchments   pp324 - 325
Hjalmar Laudon, Christopher Spence, Jim Buttle, Sean K. Carey, Jeffrey J. McDonnell et al.

Book and Arts


Exhibition: A flame-filled history   p326

News and Views


Climate change: River redirected   pp327 - 328
Rachel M. Headley
Glaciers and ice sheets are retreating in response to climate warming. An analysis of drainage patterns of a huge glacier in Yukon, Canada shows that glacier retreat has led to a drastic change in the destination of its meltwater in spring 2016.
See also: Article by Shugar et al.

Deforestation: Accelerating riverbank erosion   p328
Robert Emberson

Cryospheric science: The power of glacial microbes   pp329 - 330
Elizabeth B. Kujawinski
Organic carbon fluxes from glaciers are a key control on biogeochemical cycles in polar regions. Two analyses of carbon cycling in glaciers show the importance of glacier-surface microbial communities in setting these inputs.
See also: Article by Musilova et al. | Article by Smith et al.

Planetary Tectonics: Sinking plates on Venus   pp330 - 331
Fabio Crameri
Unlike Earth, Venus lacks discrete, moving plates. Analogue model experiments suggest that observed hints at plate recycling do indeed indicate current, localized destruction of the Venusian surface.
See also: Article by Davaille et al.

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The cold and relatively dry nature of mantle forearcs in subduction zones   pp333 - 337
G. A. Abers, P. E. van Keken and B. R. Hacker
Dehydration of subducting slabs could create a reservoir of water in the overlying mantle. A synthesis of thermal model results, however, shows that slab dehydration is slow over geological time scales, so such reservoirs are probably rare.

npj Clean Water: open for submissions

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Geomorphological evidence for ground ice on dwarf planet Ceres   pp338 - 343
Britney E. Schmidt, Kynan H. G. Hughson, Heather T. Chilton, Jennifer E. C. Scully, Thomas Platz et al.
Despite evidence for an ice-rich outer shell, little water ice has been observed on the surface of Ceres. Lobate morphologies observed on Ceres that are increasingly prevalent towards the dwarf planet's poles are consistent with ice-rich flows.

A post-accretionary lull in large impacts on early Mars   pp344 - 348
William F. Bottke and Jeffrey C. Andrews-Hanna
The timing and number of large impact basins on early Mars are poorly constrained. Gravity and topographic analyses support a lull in basin-forming impacts following the main stage of accretion.

Experimental and observational evidence for plume-induced subduction on Venus   pp349 - 355
A. Davaille, S. E. Smrekar and S. Tomlinson
Venus lacks plate tectonics, but some trenches on Venus resemble subduction zones. Laboratory experiments suggest that upwelling plumes can initiate localized subduction of a thin lithosphere such as the one on Venus.
See also: News and Views by Crameri

Microbial formation of labile organic carbon in Antarctic glacial environments   pp356 - 359
H. J. Smith, R. A. Foster, D. M. McKnight, J. T. Lisle, S. Littmann et al.
Bioavailable glacial carbon has been thought to be largely ancient or anthropogenic. Analyses of carbon dynamics in an Antarctic supraglacial stream reveal that non-photosynthetic production relies on organic carbon from photosynthetic microbes.
See also: News and Views by Kujawinski

Microbially driven export of labile organic carbon from the Greenland ice sheet   pp360 - 365
Michaela Musilova, Martyn Tranter, Jemma Wadham, Jon Telling, Andrew Tedstone et al.
Glacial systems are important sources of dissolved organic carbon to downstream ecosystems. Observations of carbon dynamics on the Greenland ice sheet reveal substantial melt season production and export of microbial dissolved organic carbon.
See also: News and Views by Kujawinski

Inland thinning on the Greenland ice sheet controlled by outlet glacier geometry   pp366 - 369
Denis Felikson, Timothy C. Bartholomaus, Ginny A. Catania, Niels J. Korsgaard, Kurt H. Kjaer et al.
Greenland's ice loss depends on propagation of mass loss from the marine glacier termini to the interior. An analysis of surface elevation change in 16 glacier catchments shows that the up-glacier extent of thinning is limited by glacier geometry.

River piracy and drainage basin reorganization led by climate-driven glacier retreat   pp370 - 375
Daniel H. Shugar, John J. Clague, James L. Best, Christian Schoof, Michael J. Willis et al.
River piracy—the diversion of one stream's headwaters into another—has occurred on long timescales. An analysis of streamflow and digital elevation models documents river re-routing in response to glacier retreat in Yukon, Canada in May 2016.
See also: News and Views by Headley

Groundwater salinity influenced by Holocene seawater trapped in incised valleys in the Red River delta plain   pp376 - 381
Flemming Larsen, Long Vu Tran, Hoan Van Hoang, Luu Thi Tran, Anders Vest Christiansen et al.
Brackish to salty waters have been found in inland areas of delta aquifers. Geophysical data and modelling suggest that salty groundwater in the Red River delta originates from trapped seawater contained in underlying Holocene marine deposits.

Onset and ending of the late Palaeozoic ice age triggered by tectonically paced rock weathering   pp382 - 386
Yves Godderis, Yannick Donnadieu, Sebastien Carretier, Markus Aretz, Guillaume Dera et al.
The late Palaeozoic was characterized by glacial cycles. Numerical simulations suggest that increased silicate weathering due to mountain uplift and soil removal caused atmospheric CO2 to fall below the threshold for glaciation.

Rise of Earth's atmospheric oxygen controlled by efficient subduction of organic carbon   pp387 - 392
Megan S. Duncan and Rajdeep Dasgupta
Little is known about the deep carbon cycle during the Archaean. High- pressure and -temperature experiments indicate that the subduction of organic carbon on a hotter, younger Earth was efficient, helping to sequester carbon in Earth's interior.

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Addendum: Large-scale subduction of continental crust implied by India-Asia mass-balance calculation   p393
Miquela Ingalls, David B. Rowley, Brian Currie and Albert S. Colman

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