Nature Geoscience contents: December 2016 Volume 9 Number 12 pp855-914

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TABLE OF CONTENTS December 2016 Volume 9, Issue 12 Editorial Correspondence Commentary News and Views Letters Articles Subscribe   Facebook   RSS   Recommend to library   Twitter   Editorial Top A step up for geoengineering   p855 doi:10.1038/ngeo2858 The clock is ticking for climate change mitigation. Geoengineering is gaining ground as an option, but it needs to be examined at a large scale to determine its effectiveness and associated risks. Correspondence Top Getting to the bottom of the ocean   pp857 - 858 Casimir de Lavergne, Gurvan Madec, Xavier Capet, Guillaume Maze and Fabien Roquet doi:10.1038/ngeo2850 Commentary Top No fudging on geoengineering   pp859 - 860 Andy Parker and Oliver Geden doi:10.1038/ngeo2851 The Intergovernmental Panel on Climate Change is preparing a report on keeping global warming below 1.5 °C. How the panel chooses to deal with the option of solar geoengineering will test the integrity of scientific climate policy advice. News and Views Top Atmospheric science: Energy and precipitation   pp861 - 862 Aaron Donohoe doi:10.1038/ngeo2846 The latitude of the tropical rainbelt is constrained by the energy balance between hemispheres. An expansion of this theory that includes longitudinal variations of atmospheric heating can predict regional changes in tropical precipitation. See also: Article by Boos & Korty Volcanology: Petit spots go big   pp862 - 863 Jonathan E. Snow doi:10.1038/ngeo2839 Mantle enrichment processes were thought to be limited to parts of oceanic plates influenced by plumes and to continental interiors. Analyses of mantle fragments of the Pacific Plate suggest that such enrichment processes may operate everywhere. See also: Article by Pilet et al. Carbon cycle: Ocean dissolved organics matter   pp864 - 865 Rainer M. W. Amon doi:10.1038/ngeo2841 Large quantities of organic carbon are stored in the ocean, but its biogeochemical behaviour is elusive. Size-age-composition relations now quantify the production of tiny organic molecules as a major pathway for carbon sequestration. See also: Letter by Walker et al. Global warming: Clouds cooled the Earth   pp865 - 867 Thorsten Mauritsen doi:10.1038/ngeo2838 The slow instrumental-record warming is consistent with lower-end climate sensitivity. Simulations and observations now show that changing sea surface temperature patterns could have affected cloudiness and thereby dampened the warming. See also: Letter by Zhou et al. Geodynamics: Surface sculpting by hidden agents   pp867 - 869 Nicky White doi:10.1038/ngeo2842 Tectonic plate interiors are often regarded as relatively inactive. Yet, reconstructions of marine terrace uplift in Angola suggest that underlying mantle flow can rapidly warp Earth's surface far from obviously active plate boundaries. See also: Article by Walker et al. Oceanography: Changing icescapes   p869 Eithne Tynan doi:10.1038/ngeo2853 Geoscience JOBS of the week PhD position at the Department of Earth Science University of Bergen Full Time Tenure-Track Assistant Professor- Organic Geochemistry, University of Oklahoma University of Oklahoma School of Geology and Geophysics Faculty Position Scripps Institution of Oceanography (SIO) at the University of California San Diego Faculty Position Scripps Institution of Oceanography (SIO) at the University of California San Diego Director: Geophysical Laboratory Carnegie Institution for Science More Science jobs from Geoscience EVENT Plant Organ Growth Symposium 2017 15.03.17 Elche, Spain More science events from Letters Top Impact of decadal cloud variations on the Earth's energy budget   pp871 - 874 Chen Zhou, Mark D. Zelinka and Stephen A. Klein doi:10.1038/ngeo2828 Cloud feedbacks strongly influence the magnitude of global warming. Climate model simulations show that these feedbacks vary strongly as the spatial patterns of sea surface temperatures change over time. See also: News and Views by Mauritsen Tropospheric ozone change from 1980 to 2010 dominated by equatorward redistribution of emissions   pp875 - 879 Yuqiang Zhang, Owen R. Cooper, Audrey Gaudel, Anne M. Thompson, Philippe Nedelec et al. doi:10.1038/ngeo2827 Ozone is an air pollutant and a greenhouse gas. Simulations with a global chemistry transport model reveal that the spatial distribution of ozone precursor emissions dominates the global ozone burden, and that emissions in the tropics matter most. Substantial global carbon uptake by cement carbonation   pp880 - 883 Fengming Xi, Steven J. Davis, Philippe Ciais, Douglas Crawford-Brown, Dabo Guan et al. doi:10.1038/ngeo2840 Cement production is a source of CO2. Analysis of carbonation, a process that sequesters CO2 during the lifetime of cement, suggests that between 1930 and 2013, it has offset 43% of CO2 emissions from cement production globally. Marine methane paradox explained by bacterial degradation of dissolved organic matter   pp884 - 887 Daniel J. Repeta, Sara Ferron, Oscar A. Sosa, Carl G. Johnson, Lucas D. Repeta et al. doi:10.1038/ngeo2837 A lot of methane is emitted from oxygenated seawater, where its production should be inhibited. Seawater incubations and organic matter characterizations reveal that bacteria aerobically produce methane from phosphonates in organic matter. Pacific carbon cycling constrained by organic matter size, age and composition relationships   pp888 - 891 Brett D. Walker, Steven R. Beaupre, Thomas P. Guilderson, Matthew D. McCarthy and Ellen R. M. Druffel doi:10.1038/ngeo2830 Organic matter represents a large pool of carbon in the ocean. Radiocarbon and chemical analyses suggest that larger particles are preferentially remineralized in the Pacific Ocean, with smaller particles and molecules persisting longer. See also: News and Views by Amon Articles Top Regional energy budget control of the intertropical convergence zone and application to mid-Holocene rainfall   pp892 - 897 William R. Boos and Robert L. Korty doi:10.1038/ngeo2833 Shifts in the latitude of the tropical rainfall band are constrained by meridional energy fluxes. Calculations show that combining zonal and meridional energy fluxes can explain past regional rainfall variations like the African Humid Period. See also: News and Views by Donohoe Pre-subduction metasomatic enrichment of the oceanic lithosphere induced by plate flexure   pp898 - 903 S. Pilet, N. Abe, L. Rochat, M.-A. Kaczmarek, N. Hirano et al. doi:10.1038/ngeo2825 Oceanic lithosphere is recycled into the mantle at subduction zones. Analysis of fragments of lower oceanic lithosphere brought to the surface by petit-spot volcanoes suggests this lithosphere may be enriched by melts prior to subduction. See also: News and Views by Snow Recycling of subducted crustal components into carbonatite melts revealed by boron isotopes   pp904 - 908 Samuel R. W. Hulett, Antonio Simonetti, E. Troy Rasbury and N. Gary Hemming doi:10.1038/ngeo2831 The origin of carbon-rich magmas is unclear. Boron isotopic analysis of carbonatite magmas that formed over the past 2.6 billion years reveals a link to carbon recycled during tectonic plate subduction. Rapid mantle-driven uplift along the Angolan margin in the late Quaternary   pp909 - 914 R. T. Walker, M. Telfer, R. L. Kahle, M. W. Dee, B. Kahle et al. doi:10.1038/ngeo2835 Mantle flow can warp Earth's surface. Reconstructions of surface deformation in Angola over the past 45,000 years reveal rapid uplift of about 2 mm per year, implying that mantle-induced uplift may occur in quick pulses. See also: News and Views by White Top Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. The digital version is available here. Find the latest scientific conferences, courses, meetings and symposia on natureevents.com. For event advertising opportunities across the Nature Publishing Group portfolio please contact natureevents@nature.com More Nature Events

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