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Research articles | Nature Geoscience
Internal structure of ultralow-velocity zones consistent with origin from a basal magma ocean . The internal structures of ultralow-velocity zones at the base of the mantle are consistent with an origin from remnants of the early Earth’s differentiation, according to seismic data analysis and geodynamical modelling. Surya Pachhai . Mingming Li . Hrvoje Tkal?i? . Article 30 Dec 2021 Jurassic greenhouse ice-sheet fluctuations sensitive to atmospheric CO 2 dynamics . Thin ice sheets during the warm Early Jurassic were tightly coupled to atmospheric CO 2 fluctuations, according to a CO 2 reconstruction based on the carbon isotopes of fossil wood. Lee Nordt . Daniel Breecker . Joseph White . Article 30 Dec 2021 Stormier mid-Holocene southwest Indian Ocean due to poleward trending tropical cyclones . Tropical cyclones frequently hit SE Africa in the mid-Holocene during positive Indian Ocean Dipole phases according to analysis of storm-related tempestite deposits in shoreface sediments off South Africa. A. N. Green . J. A. G. Cooper . M. Zabel . Article 23 Dec 2021 Influence of biogenic emissions from boreal forests on aerosol–cloud interactions . Emissions from the boreal forest biosphere can substantially increase aerosol load above the forest and influence the radiative properties of clouds, according to analysis of observations from a monitoring station in Finland. T. Pet?j? . K. Tabakova . V.-M. Kerminen . Article 23 Dec 2021 Dynamics of the abrupt change in Pacific Plate motion around 50 million years ago . Changes in Pacific Plate motion combined near equally with hotspot drift to generate the prominent bend in the Hawaiian–Emperor seamount chain some 50 million years ago, according to kinematic plate reconstruction and global dynamic models. Jiashun Hu . Michael Gurnis . R. Dietmar Müller . Article 23 Dec 2021 Tsunami size variability with rupture depth . Rupture depth helps explain variations in the size of tsunamis produced by earthquakes, according to numerical modelling and an array of observations. Kwok Fai Cheung . Thorne Lay . Yoshiki Yamazaki . Brief Communication 13 Dec 2021 Development of ice-shelf estuaries promotes fractures and calving . Ice-shelf surface rivers can form estuaries that promote fracturing and enhance calving, according to observations from the Petermann and Ryder ice shelves in Greenland. Alexandra L. Boghosian . Lincoln H. Pitcher . Robin E. Bell . Article 03 Dec 2021 A salty deep ocean as a prerequisite for glacial termination . Heat stored in the deep ocean due to salinity stratification contributed to rapid Antarctic warming during middle and late Pleistocene glacial terminations, according to coupled atmosphere–ocean general circulation model simulations. Gregor Knorr . Stephen Barker . Lennert B. Stap . Article Open Access 03 Dec 2021 Late Ordovician climate change and extinctions driven by elevated volcanic nutrient supply . Increased volcanism-related phosphorus delivery to the Late Ordovician ocean helps explain widespread cooling and eutrophication-driven extinctions, as shown by a biogeochemical model incorporating volcanic ash phosphorus and carbon isotope records. Jack Longman . Benjamin J. W. Mills . Martin R. Palmer . Article 02 Dec 2021 Deformation-controlled long-period seismicity in low-cohesion volcanic sediments . Long-period seismicity at volcanoes may be generated by deformation of weak material in the subsurface, not solely by fluid movement, according to rock deformation experiments. Pete Rowley . Philip M. Benson . Christopher J. Bean . Article 29 Nov 2021 Interglacial Antarctic–Southern Ocean climate decoupling due to moisture source area shifts . Interglacial temperature coupling between East Antarctica and the Southern Ocean was set by the position of moisture source regions, according to an 800,000-year-long deuterium-excess ice-core record from East Antarctica. A. Landais . B. Stenni . A. Grisart . Article 29 Nov 2021 Regulation of ionospheric plasma velocities by thermospheric winds . Observations from the National Aeronautics and Space Administration Ionospheric Connection Explorer confirm the link between thermospheric winds and ionospheric plasma variability. Thomas J. Immel . Brian J. Harding . Jonathan J. Makela . Article 29 Nov 2021 Marsh resilience to sea-level rise reduced by storm-surge barriers in the Venice Lagoon . Sediment supply to the Venice Lagoon is substantially reduced by flood barriers inhibiting storm-related sediment reworking and transport, according to observations through multiple storm events before and after barrier installation. Davide Tognin . Andrea D’Alpaos . Luca Carniello . Article 29 Nov 2021 Great Plains storm intensity since the last glacial controlled by spring surface warming . Shifts in the seasonal timing of land surface warming set the severity of storm systems in the southern Great Plains since the last glacial, according to a hydroclimate proxy record from Texas and palaeoclimate modelling. Chijun Sun . Timothy M. Shanahan . Priyadarsi D. Roy . Article 29 Nov 2021 Penultimate deglaciation Asian monsoon response to North Atlantic circulation collapse . The influence of meltwater pulse events on Asian monsoon systems varied in line with the degree of AMOC weakening, according to a multi-proxy analysis of speleothems from China covering the penultimate glacial termination. Jasper A. Wassenburg . Hubert B. Vonhof . Gerald H. Haug . Article Open Access 18 Nov 2021 A poorly mixed mantle transition zone and its thermal state inferred from seismic waves . The mantle transition zone is poorly, mechanically mixed, and acts to impede mantle flow, according to seismic observations integrated with detailed mineral-physics models. Lauren Waszek . Benoit Tauzin . Juan Carlos Afonso . Article 04 Nov 2021 Sulfur isotopic signature of Earth established by planetesimal volatile evaporation . Earth’s volatile element content was established largely by volatile evaporation from molten planetesimals before Earth’s formation, according to first-principles calculations and examination of sulfur isotope fractionation. Wenzhong Wang . Chun-Hui Li . Shui-Jiong Wang . Article 01 Nov 2021 Nitrogen isotopic constraints on nutrient transport to the upper ocean . Much of the nutrient transport from the deep ocean into the ocean’s upper water column occurs through the Southern Ocean, with mixing and advection playing complementary roles, according to a box model analysis of the isotopic composition of ocean nitrate. Fran?ois Fripiat . Alfredo Martínez-García . Gerald H. Haug . Article Open Access 01 Nov 2021 Persistent orbital influence on millennial climate variability through the Pleistocene . Orbital forcing consistently influenced the magnitude of millennial-scale climate variability through the Pleistocene, according to an analysis of four high-resolution Northern Hemisphere proxy records covering the past 1.5?Myr. Youbin Sun . Jerry F. McManus . Zhisheng An . Article 01 Nov 2021 Vertical decoupling in Late Ordovician anoxia due to reorganization of ocean circulation . Reorganized ocean circulation during Late Ordovician cooling altered oxygenation through the water column, provoking a new look at the extinction mechanism, according to anoxia reconstructions using the I/Ca proxy and Earth system modelling. Alexandre Pohl . Zunli Lu . Andy Ridgwell . Article 01 Nov 2021 .
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