Matters Arising
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Open Access
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Matters Arising
| Open AccessA reexamination on how behavioral interventions can promote household action to limit climate change
- Paul C. Stern
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Article
| Open AccessEvapotranspiration depletes groundwater under warming over the contiguous United States
New hydrological simulations show for the first time how sensitive groundwater and surface water connections are to systematic warming across the continental United States. The authors here show a clear reduction in subsurface water storage under a warming climate and intensified aridification of north America.
- Laura E. Condon
- , Adam L. Atchley
- & Reed M. Maxwell
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Article
| Open AccessCarbon footprint of global natural gas supplies to China
The carbon footprints of natural gas supplies at the field level are unclear. Here the authors analysed the GHG intensities of gas supplies from 104 fields and show that their GHG intensities range from 6.2 to 43.3 g CO2eq MJ-1.
- Yu Gan
- , Hassan M. El-Houjeiri
- & Michael Wang
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Article
| Open AccessDistinct iron cycling in a Southern Ocean eddy
Eddies are common ocean features that isolate large swaths of seawater, but it is unclear how they influence productivity of phytoplankton trapped inside. Here Ellwood and colleagues use stable and radiogenic isotopes to characterize a Southern Ocean eddy, finding vanishingly low iron concentrations that drive low productivity across the region.
- Michael J. Ellwood
- , Robert F. Strzepek
- & Philip W. Boyd
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Article
| Open AccessAnthropogenically-driven increases in the risks of summertime compound hot extremes
Compound hot extremes that combine day- and nighttime heat have particularly strong impacts. Here, the authors show that anthropogenic emissions of greenhouse gases have made compound hot extremes increasingly frequent and intense, and project that under future emissions four to eight times as many people will be affected by them by 2100.
- Jun Wang
- , Yang Chen
- & Jiangjiang Xia
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Article
| Open AccessGlobal determinants of freshwater and marine fish genetic diversity
Biogeographic patterns of genetic diversity are poorly documented, especially for fish species. Here the authors show that (mitochondrial) genetic diversity has global spatial organization patterns with different environmental drivers for marine and freshwater fishes, where genetic diversity is only partly congruent with species richness.
- Stéphanie Manel
- , Pierre-Edouard Guerin
- & Loïc Pellissier
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Article
| Open AccessPlant diversity effects on forage quality, yield and revenues of semi-natural grasslands
Higher plant diversity in agricultural settings is often associated with lower biomass yield and with lower forage quality. Here, Schaub et al. show positive effects of plant diversity on biomass yield, quality-adjusted yield and revenues in semi-natural grassland across a range of management intensities.
- Sergei Schaub
- , Robert Finger
- & Michael Scherer-Lorenzen
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Article
| Open AccessRain and small earthquakes maintain a slow-moving landslide in a persistent critical state
In this study, the authors show the interaction between seismic activity and rainfalls on landslide movement and how their timing controls landslide stability and motion.
- Noélie Bontemps
- , Pascal Lacroix
- & Edu Taipe
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Article
| Open AccessSingle cell analyses reveal contrasting life strategies of the two main nitrifiers in the ocean
Ammonia oxidizing archaea and Nitrospinae are the main known nitrifiers in the ocean, but the much greater abundance of the former is puzzling. Here, the authors show that differences in mortality, rather than thermodynamics, cell size or biomass yield, explain the discrepancy, without the need to invoke yet undiscovered, abundant nitrite oxidizers.
- Katharina Kitzinger
- , Hannah K. Marchant
- & Marcel M. M. Kuypers
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Article
| Open AccessThe empirical basis for modelling glacial erosion rates
Glaciers have profoundly shaped Earth’s surface, but glacial erosion models lack a strong empirical basis. Cook et al. have compiled a dataset that illustrates how the speed at which glaciers move controls the rate at which they erode, and that climate is crucial in modulating glacier sliding speed and erosion rates.
- Simon J. Cook
- , Darrel A. Swift
- & Richard I. Waller
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Article
| Open AccessEnhanced eddy activity in the Beaufort Gyre in response to sea ice loss
The freshwater content of the Beaufort Gyre in the Western Arctic Ocean has increased in response to almost two decades of persistent anti-cyclonic winds. Here, the authors found that dramatic loss of sea ice and acceleration of surface currents after 2007 led to a net annual wind energy input to the Beaufort Gyre, and anticipate that continued sea ice decline will lead to an increasingly energetic Beaufort Gyre.
- Thomas W. K. Armitage
- , Georgy E. Manucharyan
- & Andrew F. Thompson
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Article
| Open AccessCommunity diversity and habitat structure shape the repertoire of extracellular proteins in bacteria
Microbes secrete a repertoire of extracellular proteins to serve various functions depending on the ecological context. Here the authors examine how bacterial community composition and habitat structure affect the extracellular proteins, showing that generalist species and those living in more structured environments produce more extracellular proteins, and that costs of production are lower in more diverse communities.
- Marc Garcia-Garcera
- & Eduardo P. C. Rocha
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Article
| Open AccessInitiation of a stable convective hydroclimatic regime in Central America circa 9000 years BP
What drives hydroclimate changes in tropical regions is not well known. Here, the authors present a 12,000 year long precipitation record from Guetemala which shows that exceeding a threshold in sea surface temperatures caused Central American rainfall to change from a dry to an active convective regime around 9000 years ago.
- Amos Winter
- , Davide Zanchettin
- & Carla Taricco
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Article
| Open AccessRanking environmental degradation trends of plastic marine debris based on physical properties and molecular structure
Accumulation of micro and nano-plastic in the oceans has emerged as a global challenge. Here, the authors predict a hierarchy of features that regulate their degradation and surface erosion by a thorough analysis of polymer structure, composition, physical properties and degradation data.
- Kyungjun Min
- , Joseph D. Cuiffi
- & Robert T. Mathers
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Article
| Open AccessUsing remarkability to define coastal flooding thresholds
The degree of flooding in a particular location depends sensitively on local topography and bathymetry. Here the authors used the remarkability of flood events to estimate county-specific flood thresholds for shoreline counties along the Atlantic and Gulf coasts of the United States and found that several areas experience noticeable flooding at a height lower than existing thresholds.
- Frances C. Moore
- & Nick Obradovich
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Article
| Open AccessA system wide approach to managing zoo collections for visitor attendance and in situ conservation
Zoos contribute to conservation actions in the wild. Here, Mooney et al. use a global dataset to show that, while zoos with more and larger animals attract the most visitors and contribute the most to conservation projects, there are viable alternative strategies to maximise attendance and conservation activity.
- Andrew Mooney
- , Dalia A. Conde
- & Yvonne M. Buckley
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Article
| Open AccessThe megabiota are disproportionately important for biosphere functioning
Human-driven losses of megafauna and megaflora may have disproportionate ecological consequences. Here, the authors combine metabolic scaling theory and global simulation models to show that past and continued reduction of megabiota have and will continue to decrease ecosystem and biosphere functioning.
- Brian J. Enquist
- , Andrew J. Abraham
- & Christopher E. Doughty
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Article
| Open AccessTropical cyclone rainbands can trigger meteotsunamis
Tropical cyclones can cause severe damage, in particular through flooding of coastal areas. Here, the authors show that in addition to known impacts, tropical cyclone rainbands can cause meteotsunami waves that can contribute significantly to the total water levels and hence flooding risks.
- Luming Shi
- , Maitane Olabarrieta
- & John C. Warner
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Article
| Open AccessGlobal meta-analysis shows pervasive phosphorus limitation of aboveground plant production in natural terrestrial ecosystems
Plants are thought to be limited by phosphorus (P) especially in tropical regions. Here, Hou et al. report a meta-analysis of P fertilization experiments to show widespread P limitation on plant growth across terrestrial ecosystems modulated by climate, ecosystem properties, and fertilization regimes
- Enqing Hou
- , Yiqi Luo
- & Dazhi Wen
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Article
| Open AccessPollution exacerbates China’s water scarcity and its regional inequality
The impact on inadequate water quality on water scarcity is unclear. Here the authors quantify China’s present-day water scarcity and show that inadequate water quality exacerbates China’s water scarcity, which is unevenly distributed across the country.
- Ting Ma
- , Siao Sun
- & Chenghu Zhou
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Article
| Open AccessElectronic parameters in cobalt-based perovskite-type oxides as descriptors for chemocatalytic reactions
Design of efficient catalysts requires understanding the decisive electronic parameters for catalytic efficacy and their dependence on elemental composition. Here, the authors report covalency as suitable descriptor of perovskite-type transition metal oxides as chemo-catalysts.
- Johannes Simböck
- , M. Ghiasi
- & Regina Palkovits
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Article
| Open AccessDust tides and rapid meridional motions in the Martian atmosphere during major dust storms
The authors here present the diurnal tides of dust within the southern Martian atmosphere. The dust tides imply a fast meridional exchange of heat and materials on Mars and allow water content near the summer pole to be rapidly transported to the middle latitudes in the nighttime which is then lifted by daytime deep convection.
- Zhaopeng Wu
- , Tao Li
- & Jun Cui
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Article
| Open AccessOcean circulation causes the largest freshening event for 120 years in eastern subpolar North Atlantic
The Atlantic Ocean overturning circulation is important to the global climate system. Here the authors show that eastern subpolar North Atlantic underwent extreme freshening during 2012 to 2016, with a magnitude never seen before in 120 years of surface measurements.
- N. Penny Holliday
- , Manfred Bersch
- & Igor Yashayaev
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Article
| Open AccessFingerprint of rice paddies in spatial–temporal dynamics of atmospheric methane concentration in monsoon Asia
The role of paddy rice agriculture in the spatial and temporal dynamics of atmospheric methane concentration remains unclear. Here, Zhang et al. show that regions with dense rice paddies have high satellite-based column averaged CH4 concentrations (XCH4), and that seasonal dynamics of XCH4 mirror those of paddy rice growth.
- Geli Zhang
- , Xiangming Xiao
- & Berrien Moore III
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Article
| Open AccessThe Red Sea Deep Water is a potent source of atmospheric ethane and propane
The Middle East is known to emit large amounts of non-methane hydrocarbon pollutants to the atmosphere, but the sources are poorly characterized. Here the authors discover a new source—deep water in the Red Sea—and calculate that its emissions exceed rates of several high gas-production countries.
- E. Bourtsoukidis
- , A. Pozzer
- & J. Williams
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Article
| Open AccessFormation of bridgmanite-enriched layer at the top lower-mantle during magma ocean solidification
Following the impact of the protoplanet Theia, planet Earth likely transformed into a magma ocean. New high temperature and pressure experiments by Xie et al. suggest that a layer enriched in bridgmanite formed during the magma ocean phase of Earth–remnants of this ancient layer today may be responsible for the viscosity peak between 660 and 1500 km in present solid mantle.
- Longjian Xie
- , Akira Yoneda
- & Denis Andrault
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Article
| Open AccessUnprecedented Fe delivery from the Congo River margin to the South Atlantic Gyre
The influence of the Congo River margin on surface Fe concentrations is understudied. Here the authors show that such influence is evident over 1000 km from the Congo outflow.
- Lúcia H. Vieira
- , Stephan Krisch
- & Eric P. Achterberg
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Article
| Open AccessLow growth resilience to drought is related to future mortality risk in trees
Resilience to drought is crucial for tree survival under climate change. Here, DeSoto et al. show that trees that died during drought were less resilient to previous dry events compared to surviving conspecifics, but the resilience strategies differ between angiosperms and gymnosperms.
- Lucía DeSoto
- , Maxime Cailleret
- & Jordi Martínez-Vilalta
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Article
| Open AccessEarthquake slip surfaces identified by biomarker thermal maturity within the 2011 Tohoku-Oki earthquake fault zone
In this study, the authors investigate thermal alteration of organic biomarkers to detect paleo earthquakes in the Japan Trench. The study shows that large earthquakes like the 2011 Tohoku-Oki earthquake can slip through different types of sediment rather than being restricted to the weakest layers.
- Hannah S. Rabinowitz
- , Heather M. Savage
- & James D. Kirkpatrick
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Article
| Open AccessSoil structure is an important omission in Earth System Models
The effect of soil structure is not included in most Earth System Models. The authors here introduce and evaluate the consequences at local and global scale of modifying hydraulic properties of soils in response to biological activity—a process significantly changing soil structure.
- Simone Fatichi
- , Dani Or
- & Roni Avissar
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Article
| Open AccessGlobal projections of future urban land expansion under shared socioeconomic pathways
Shared socioeconomic pathways (SSPs) is a crucial scenario describing the potential of future socio-economic development. The authors here investigate long-term effects of various government policies suggested by different SSPs on urban land and reveal the impact of future urban expansion on other land and food production.
- Guangzhao Chen
- , Xia Li
- & Kangning Huang
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Article
| Open AccessParis Climate Agreement passes the cost-benefit test
Relative economic benefits of achieving temperature targets have not properly accounted for damages at higher temperatures. Here the authors integrate dynamic cost-benefit analysis with a damage-cost curve and show that the Paris Climate Agreement constitutes the economically optimal policy pathway for the future.
- Nicole Glanemann
- , Sven N. Willner
- & Anders Levermann
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Article
| Open AccessUncovering and quantifying the subduction zone sulfur cycle from the slab perspective
Sulfur is one of the key volatiles in Earth’s chemical cycles; however, sulfur speciation, isotopic composition, and flux during the subduction cycle remain unclear. Here, the authors provide direct constraints on subduction zone sulfur recycling from high-pressure rocks and explore implications for arc magmatism.
- Ji-Lei Li
- , Esther M. Schwarzenbach
- & Xin-Shui Wang
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Article
| Open AccessLearning algorithms allow for improved reliability and accuracy of global mean surface temperature projections
The ensemble spread of climate models is often interpreted as the uncertainty of the projection, but this is not always justified. Applying learning algorithms to an ensemble of climate predictions allows for a significant uncertainty reduction of projected global mean surface temperatures compared to the ensemble spread.
- Ehud Strobach
- & Golan Bel
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Article
| Open AccessThe systemic and governmental agendas in presidential attention to climate change in Mexico 1994–2018
It is important to gain a better understanding on the contributing factors fostering climate action in developing countries. Here, the authors investigate the attention levels paid to this issue in the planning and implementation stages of climate policies in Mexico during 1994-2018, and find that international negotiations and executive governmental plans are strong drivers of the climate policy discourse in Mexico and likely to be so for developing countries more generally.
- Arturo Balderas Torres
- , Priscila Lazaro Vargas
- & Jouni Paavola
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Article
| Open AccessNo detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum
The Southern Ocean plays a key role in glacial-interglacial transitions and today, Weddell Sea derived Antarctic Bottom Water is one of the most important deep water masses. New records show that in contrast to today, no Weddell Sea water was exported during the last two glacial maxima, providing new insights towards the condition of Antarctic Bottom Water formation in extreme climate states.
- Huang Huang
- , Marcus Gutjahr
- & Gerhard Kuhn
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Article
| Open AccessBiological impact of lead from halide perovskites reveals the risk of introducing a safe threshold
Halide perovskites are promising for next generation photovoltaic technology but their environmental impact has not been fully evaluated. Here Li et al. show that the lead from perovskites is ten times more dangerous than lead-containing electronics while tin perovskites are much less bioavailable.
- Junming Li
- , Hai-Lei Cao
- & Antonio Abate
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Article
| Open AccessPrecise radiometric age establishes Yarrabubba, Western Australia, as Earth’s oldest recognised meteorite impact structure
The ~70 km-diameter Yarrabubba impact structure in Western Australia has previously been regarded as among Earth’s oldest meteorite craters, but has hitherto lacked absolute age constraints. Here, the authors determine a precise impact age of 2229 ± 5 Ma, which extends the terrestrial cratering record back in time by > 200 million years and establishes Yarrabubba as the oldest recognised meteorite impact structure on Earth.
- Timmons M. Erickson
- , Christopher L. Kirkland
- & Thomas M. Davison
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Article
| Open AccessIncrease in global emissions of HFC-23 despite near-total expected reductions
International agreements have been implemented to reduce emissions of hydrofluorocarbons (HFCs) to reduce their radiative forcing. Even though reported HFC-23 emissions are at a historical low, observations indicate that emissions have actually increased over recent years to higher levels than previously.
- K. M. Stanley
- , D. Say
- & M. Rigby
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Article
| Open AccessGreenhouse gas emissions resulting from conversion of peat swamp forest to oil palm plantation
The magnitude of greenhouse gas emissions from land use change on tropical peatlands is unclear. Here, the authors measure greenhouse gas fluxes throughout the conversion from peat swamp forest to oil palm plantation, and estimate the contribution to regional and global emissions.
- Hannah V. Cooper
- , Stephanie Evers
- & Sofie Sjogersten
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Article
| Open AccessAntarctic Ice Sheet and emission scenario controls on 21st-century extreme sea-level changes
There are significant uncertainties of how large sea level changes due to Antarctic Ice Sheet melting could be. Here, the authors quantify the impact of different greenhouse gas emission scenarios and different Antarctic contributions to changes to extreme sea-level events and find that even under low emissions the occurrence of sea-level extremes could rise significantly due to Antarctic meltwater increase.
- Thomas Frederikse
- , Maya K. Buchanan
- & Roderik S. W. van de Wal
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Article
| Open AccessThe shift of phosphorus transfers in global fisheries and aquaculture
Despite growing aquaculture production and environmental concerns on phosphorus (P) enrichment, the P budgets of fisheries have been largely overlooked. Here, Huang et al. calculate global fishery P budgets and estimate P use efficiency for a wide range of aquaculture systems.
- Yuanyuan Huang
- , Phillipe Ciais
- & Haicheng Zhang
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Article
| Open AccessWeak phases production and heat generation control fault friction during seismic slip
Decrease of friction during seismic slip is linked to temperature increase and weak phases production inside the fault core. Here the authors propose a mathematical framework which explains the frictional behaviour of all materials reported in literature and precisely captures material weakening during fault slip.
- Hadrien Rattez
- & Manolis Veveakis
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Article
| Open AccessVirulent coliphages in 1-year-old children fecal samples are fewer, but more infectious than temperate coliphages
The impact of bacteriophages in the human gut microbiome remains poorly understood. Here, the authors characterize coliphages isolated from a large cohort of 1-year-old infants and show that temperate coliphages dominate, while virulent ones have greater infectivity and broader host range.
- Aurélie Mathieu
- , Moïra Dion
- & Marie-Agnès Petit
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Article
| Open AccessImproved estimates on global carbon stock and carbon pools in tidal wetlands
Wetlands are global hotspots of carbon storage, but errors exist with current estimates of the extent of their carbon density. Here the authors show that mangrove sediment organic carbon stock has previously been overestimated, while ecosystem carbon stock has been underestimated.
- Xiaoguang Ouyang
- & Shing Yip Lee
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Article
| Open AccessWarming of hot extremes alleviated by expanding irrigation
How the effects of irrigation on the climate conditions compare to other anthropogenic forcings is not well known. Observational and model evidence show that expanding irrigation has dampened historical anthropogenic warming during hot days, an effect that is particularly strong over South Asia.
- Wim Thiery
- , Auke J. Visser
- & Sonia I. Seneviratne
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Article
| Open AccessA predator-prey interaction between a marine Pseudoalteromonas sp. and Gram-positive bacteria
Predator-prey interactions play important roles in the cycling of marine organic matter. Here the authors show that a Gram-negative bacterium isolated from marine sediments can kill and feed on Gram-positive bacteria by secreting a peptidoglycan-degrading enzyme.
- Bai-Lu Tang
- , Jie Yang
- & Yu-Zhong Zhang
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Comment
| Open AccessConservation must capitalise on climate’s moment
Gardner and colleagues argue that efforts to conserve biodiversity should capitalise on current momentum in the realm of climate change policy.
- Charlie J. Gardner
- , Matthew J. Struebig
- & Zoe G. Davies
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Article
| Open AccessGold endowments of porphyry deposits controlled by precipitation efficiency
Porphyry copper and gold deposits are the dominant natural suppliers of these metals to our society, yet the large variations in metal endowments of porphyry Cu–Au deposits remain obscure. Here, the author shows that Cu-rich porphyries require large amounts of magma and water to be formed, while Au-rich porphyries are the result of a better efficiency of Au precipitation.
- Massimo Chiaradia