Thursday, February 1, 2018

Nature Geoscience contents: February 2018 Volume 11 Number 2

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Nature Geoscience

February 2018 Volume 11, Issue 2

News & Views
Spotlight on Kanagawa 

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Lower house prices, proximity to Tokyo, and a burgeoning R&D ecosystem are thrusting Kanagawa into the modern world from its ancient history. 

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A history of instability    p83

News & Views


An Archaean oxygen oasis    pp84 - 85
Maya L. Gomes

An Archaean mushy mantle    pp85 - 86
Stephen Parman

Catastrophic glacier collapse    p87
James Tuttle Keane

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Land radiative management as contributor to regional-scale climate adaptation and mitigation    pp88 - 96
Sonia I. Seneviratne, Steven J. Phipps, Andrew J. Pitman, Annette L. Hirsch, Edouard L. Davin et al.

Land management with the aim of reducing incoming solar radiation could help with regional-scale climate adaptation and mitigation as well as ecosystem services, and avoids several shortcomings of global geoengineering.


A Palaeoproterozoic tectono-magmatic lull as a potential trigger for the supercontinent cycle    pp97 - 101
Christopher J. Spencer, J. Brendan Murphy, Christopher L. Kirkland, Yebo Liu et al.

Earth experienced a lull in magmatic and tectonic activity about 2.3 billion years ago, followed by a flare-up of magmatism, according to a compilation of existing geologic data. These events might mark the transition to the supercontinent cycle.


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Pathways to 1.5 °C and 2 °C warming based on observational and geological constraints    pp102 - 107
Philip Goodwin, Anna Katavouta, Vassil M. Roussenov, Gavin L. Foster, Eelco J. Rohling et al.

A 1.5 °C climate target implies total emissions of carbon from the start of 2017 must fall below 195 to 205 PgC, according to an observationally constrained very large ensemble of simulations with an efficient Earth system model.


Role of polar anticyclones and mid-latitude cyclones for Arctic summertime sea-ice melting    pp108 - 113
Heini Wernli & Lukas Papritz

Variability of summertime Arctic sea-ice reduction is closely linked to transient Arctic anticyclones, which result from air mass injections into the Arctic upper troposphere associated with extratropical cyclones.


Massive collapse of two glaciers in western Tibet in 2016 after surge-like instability    pp114 - 120
Andreas Kääb, Silvan Leinss, Adrien Gilbert, Yves Bühler, Simon Gascoin et al.

Two catastrophic glacier collapse events in western Tibet in 2016 were caused by a convergence of weather and glacier-bed conditions, according to an analysis of observations and modelling.


Response of Pacific-sector Antarctic ice shelves to the El Niño/Southern Oscillation    pp121 - 126
F. S. Paolo, L. Padman, H. A. Fricker, S. Adusumilli, S. Howard et al.

Ice-shelf mass in the Amundsen Sea is influenced by El Niño events and other interannual climate variability, according to an analysis of satellite altimeter data from 1994 to 2017.


Contribution of wetlands to nitrate removal at the watershed scale    pp127 - 132
Amy T. Hansen, Christine L. Dolph, Efi Foufoula-Georgiou & Jacques C. Finlay

Depending on their connectivity to the river network, wetlands can be much more efficient at removing nitrate in a watershed than common nitrogen mitigation strategies according to an analysis of the Minnesota River basin.


Isotopic evidence for oxygenated Mesoarchaean shallow oceans    pp133 - 138
Benjamin Eickmann, Axel Hofmann, Martin Wille, Thi Hao Bui, Boswell A. Wing et al.

Oxidized sulfur, formed in photochemical reactions in an anoxic atmosphere, fuelled microbial sulfate reduction in Mesoarchaean oxygenated near-shore seas, according to sulfur and iron isotopes in pyrite.


Deep and persistent melt layer in the Archaean mantle    pp139 - 143
Denis Andrault, Giacomo Pesce, Geeth Manthilake, Julien Monteux, Nathalie Bolfan-Casanova et al.

A persistent melt layer may have existed in the Archaean upper mantle, according to experimental analyses. The melt layer could have decoupled the mantle from the overlying lithosphere, hindering plate tectonics.


Oxidized iron in garnets from the mantle transition zone    pp144 - 147
Ekaterina S. Kiseeva, Denis M. Vasiukov, Bernard J. Wood, Catherine McCammon, Thomas Stachel et al.

The lowermost mantle and transition zone are increasingly oxidized at depth, according to analyses of the oxidation state of iron in majoritic garnet inclusions from deep diamonds.


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