News & Views |
Featured
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Article |
Substantial halogenated organic chemicals stored in permafrost soils on the Tibetan Plateau
Chemical analyses show permafrost soils on the Tibetan Plateau contain large amounts of halogenated organic chemicals that could be remobilized in a changing climate.
- Xiaojing Zhu
- , Fan Yang
- & Jan Schwarzbauer
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Article |
High natural nitric oxide emissions from lakes on Tibetan Plateau under rapid warming
High-resolution satellite observations reveal that large lakes on the Tibetan Plateau have total nitric oxide emissions comparable to anthropogenic emissions from individual megacities worldwide.
- Hao Kong
- , Jintai Lin
- & Wanyun Xu
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Article |
Increasing atmospheric helium due to fossil fuel exploitation
Mass spectrometry measurements show that the concentration of helium in the atmosphere has risen over the past five decades due to fossil fuel emissions.
- Benjamin Birner
- , Jeffrey Severinghaus
- & Ralph F. Keeling
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Article |
Temperature control on CO2 emissions from the weathering of sedimentary rocks
The release of carbon dioxide during oxidative weathering of sedimentary rocks acts as a positive feedback to warming, according to 2.5 years of CO2 flux measurements from the Draix-Bléone Critical Zone Observatory, France.
- Guillaume Soulet
- , Robert G. Hilton
- & Caroline Le Bouteiller
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Editorial |
The rise of ocean robots
As the COVID-19 pandemic halts many research cruise activities, exploration of the oceans by autonomous vehicles continues, highlighting the strengths of robotic research, but also the limitations.
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Article |
Atmospheric transport and deposition of microplastics in a remote mountain catchment
Microplastics can reach and affect regions far from where they are released because of atmospheric transport, suggest analyses of atmospheric deposition in a remote, pristine mountain catchment in France.
- Steve Allen
- , Deonie Allen
- & Didier Galop
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News & Views |
Tracking pollutant emissions
Progress in the post-combustion treatment of diesel vehicle exhaust has led to shifting proportions of the constituents of nitrogen oxides. Observations from 61 European cities suggest that the outlook on attaining NO2 standards is more optimistic than expected.
- Drew R. Gentner
- & Fulizi Xiong
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Article |
Lower vehicular primary emissions of NO2 in Europe than assumed in policy projections
The fraction of NO2 in NO x emitted from European road transport is up to a factor of two smaller than used in policy projections, suggests an analysis of 130 million roadside observations. Roadside air quality standards may thus be obtained faster.
- Stuart K. Grange
- , Alastair C. Lewis
- & David C. Carslaw
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Article |
Comprehensive characterization of atmospheric organic carbon at a forested site
Atmospheric organic compounds are central to key chemical processes that influence air quality. Concurrent measurements of a wide range of these compounds, including previously unmeasured ones, provide closure on OH reactivity.
- James F. Hunter
- , Douglas A. Day
- & Jesse H. Kroll
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Article |
High levels of endocrine pollutants in US streams during low flow due to insufficient wastewater dilution
Wastewater can make up a large fraction of stream flow. An analysis of over 14,000 US streams shows that under severe low-flow conditions, wastewater containing endocrine disruptors is poorly diluted, and many streams exceed safety thresholds.
- Jacelyn Rice
- & Paul Westerhoff
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Editorial |
For people and planet
The emerging field of geohealth links human well-being and ecosystem health. A deeper understanding of these linkages can help society mitigate the health costs of economic growth before they become crises.
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News & Views |
Cleaner Chinese lakes
Phosphorus loading can cause eutrophication of lakes. Analyses of lake chemistry in China reveal that policies have led to lower phosphorus levels overall, but increasing trends in some lakes suggest that expanded policies may be needed.
- Jessica Corman
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Article |
Decline in Chinese lake phosphorus concentration accompanied by shift in sources since 2006
Many lakes in China are subject to eutrophication. Water quality analyses on 862 Chinese lakes reveal that better sanitation has reduced phosphorus inputs in the most populated areas, but aquaculture and livestock offset improvements elsewhere.
- Yindong Tong
- , Wei Zhang
- & Yan Lin
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Correspondence |
Save northern high-latitude catchments
- Hjalmar Laudon
- , Christopher Spence
- & Doerthe Tetzlaff
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Article |
Microbially driven export of labile organic carbon from the Greenland ice sheet
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.
- Michaela Musilova
- , Martyn Tranter
- & Alexandre M. Anesio
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Editorial |
Cleaner urban air tomorrow?
Air pollution in large cities remains a persistent public health problem. Adapting air quality forecasts for use by decision makers could help mitigate severe pollution events.
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News & Views |
Indo-Gangetic groundwater threat
Increasing groundwater extraction supports hundreds of millions of people across the Indo-Gangetic Basin. Data suggests that despite the increase in withdrawals, groundwater depletion is localized and the most widespread threat is contamination.
- Scott Fendorf
- & Shawn G. Benner
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Letter |
Groundwater quality and depletion in the Indo-Gangetic Basin mapped from in situ observations
Increasing groundwater abstraction in the Indo-Gangetic Basin poses a threat to groundwater supplies. In situ observations reveal that sustainable groundwater in much of the region is limited more by contamination than depletion.
- A. M. MacDonald
- , H. C. Bonsor
- & S. K. Yadav
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Letter |
Space-based detection of missing sulfur dioxide sources of global air pollution
Sulfur dioxide is a key air contaminant. A satellite-based emissions inventory reveals a number of hitherto unknown sources, with a cluster around the Persian Gulf, and identifies large discrepancies with conventional inventories in some regions.
- Chris A. McLinden
- , Vitali Fioletov
- & Joanna Joiner
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Letter |
Rapid increases in tropospheric ozone production and export from China
Tropospheric levels of ozone and its precursors have risen in Asia since 2000. Satellite observations and chemistry–transport simulations suggest that transport of these pollutants to North America partly offsets benefits from stricter regulation.
- Willem W. Verstraeten
- , Jessica L. Neu
- & K. Folkert Boersma
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Letter |
Efficiency of short-lived halogens at influencing climate through depletion of stratospheric ozone
Short-lived halogens are produced naturally and anthropogenically, and are not governed by the Montreal Protocol. Like halocarbons, short-lived halogens destroy lower-stratospheric ozone, resulting in a net cooling effect since pre-industrial times.
- R. Hossaini
- , M. P. Chipperfield
- & W. Feng
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News & Views |
Night-time sinks, daytime sources
Nitrous acid can initiate photochemical air pollution events, but it is not clear where it comes from. Laboratory experiments now suggest that surface-bound nitrite accumulated overnight can release nitrous acid during the daytime.
- Jonathan Raff
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Letter |
Decreasing emissions of NOx relative to CO2 in East Asia inferred from satellite observations
Global CO2 emissions are usually assessed from uncertain bottom-up estimates. A satellite-based top-down estimate suggests that emissions of NOx in East Asia have been reduced relative to those of CO2 since 2003, probably due to cleaner technology.
- M. Reuter
- , M. Buchwitz
- & J. P. Burrows
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News & Views |
Bacterial bloom and crash
Microbes quickly consumed much of the methane released in the 2010 Gulf of Mexico oil spill. Time-series measurements now suggest that, after a steep rise, methane oxidation rates crashed while hydrocarbon discharge was still continuing at the wellhead.
- Evan A. Solomon