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| Open AccessOvershooting the critical threshold for the Greenland ice sheet
Simulations using two state-of-the-art ice-sheet models show that abrupt melting of the Greenland ice sheet following overshooting of the global mean temperature critical threshold can be mitigated by subsequent cooling to below 1.5 °C.
- Nils Bochow
- , Anna Poltronieri
- & Niklas Boers
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Article |
Precipitation regime changes in High Mountain Asia driven by cleaner air
Dipolar precipitation change in High Mountain Asia during summer is primarily driven by weakened westerly jet and decadal variations in the South Asian monsoon, and the dipolar pattern is projected to shift to a monopolar wetting trend in the 2040s.
- Jie Jiang
- , Tianjun Zhou
- & Ziming Chen
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Article |
Climate warming increases extreme daily wildfire growth risk in California
Quantification of climate warming in California using machine learning shows increased daily wildfire growth risk by 25%, with an expected increase of 59% and 172% in 2100, for low- and very-high-emissions scenarios, respectively.
- Patrick T. Brown
- , Holt Hanley
- & Craig B. Clements
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Article
| Open AccessAnthropogenic fingerprints in daily precipitation revealed by deep learning
Deep learning using a convolutional neural network trained with daily precipitation fields and annual global mean surface air temperature data demonstrates that anthropogenically induced climate change has a detectable effect on daily hydrological fluctuations.
- Yoo-Geun Ham
- , Jeong-Hwan Kim
- & Malte F. Stuecker
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Article
| Open AccessIncreased occurrences of consecutive La Niña events under global warming
Analysis of climate models under future greenhouse-gas forcings shows that the frequency of consecutive La Niña events will increase, driven by ocean–atmosphere feedbacks that slow the heat recharge of the equatorial Pacific.
- Tao Geng
- , Fan Jia
- & Michael J. McPhaden
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Article |
A warming-induced reduction in snow fraction amplifies rainfall extremes
The recent and projected future increase in rainfall extremes in high-elevation areas of the Northern Hemisphere is due to a warming-induced shift from snow to rain.
- Mohammed Ombadi
- , Mark D. Risser
- & Charuleka Varadharajan
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Matters Arising |
On the evidence of a trend in the CO2 airborne fraction
- Mikkel Bennedsen
- , Eric Hillebrand
- & Siem Jan Koopman
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Article |
Abyssal ocean overturning slowdown and warming driven by Antarctic meltwater
Simulations show that projected increases in Antarctic meltwater will slow down the abyssal ocean overturning circulation over the coming decades and lead to warming and ageing of the ocean abyss.
- Qian Li
- , Matthew H. England
- & Adele K. Morrison
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Article
| Open AccessOceanic climate changes threaten the sustainability of Asia’s water tower
Weakening blocking effect of the High Mountain Asia on the westerlies-carried deficit in precipitation minus evaporation from the southeast North Atlantic is demonstrated, leading to persistent northward expansion of terrestrial water storage deficit in the Tibet Plateau.
- Qiang Zhang
- , Zexi Shen
- & Gang Wang
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Article |
A year-round satellite sea-ice thickness record from CryoSat-2
Deep learning and numerical simulations of CryoSat-2 radar altimeter data are used to generate a pan-Arctic sea-ice thickness dataset for the Arctic melt period.
- Jack C. Landy
- , Geoffrey J. Dawson
- & Yevgeny Aksenov
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Article |
Delayed use of bioenergy crops might threaten climate and food security
Simulations of historical and future periods of climate change showed that delayed mitigation to limit global warming might reduce the capacity of bioenergy with carbon capture and storage and threaten climate stability and food security.
- Siqing Xu
- , Rong Wang
- & Renhe Zhang
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Article |
Expanding ocean food production under climate change
Sustainable mariculture could increase seafood production under almost all climate-change scenarios analysed, but this would require substantial fisheries reforms, continued advances in feed technology and the establishment of effective mariculture governance and best practices.
- Christopher M. Free
- , Reniel B. Cabral
- & Steven D. Gaines
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Article |
Realization of Paris Agreement pledges may limit warming just below 2 °C
If all new and updated national climate change mitigation pledges stemming from the Paris Agreement are implemented in full and on time, then 21st-century warming could be limited to just below 2 degrees Celsius.
- Malte Meinshausen
- , Jared Lewis
- & Bernd Hackmann
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Article |
RETRACTED ARTICLE: New land-use-change emissions indicate a declining CO2 airborne fraction
By generating a land use and land cover change emissions dataset using visibility data from two key deforestation regions, analysis of the data suggests a decrease in the CO2 airborne fraction since 1959.
- Margreet J. E. van Marle
- , Dave van Wees
- & Guido. R. van der Werf
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Article |
Emergent constraints on future precipitation changes
Model simulations show that the historical relationship between global temperature and precipitation under a medium greenhouse gas concentration scenario lowers the projected high end of future precipitation change.
- Hideo Shiogama
- , Masahiro Watanabe
- & Nagio Hirota
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Article |
Historical glacier change on Svalbard predicts doubling of mass loss by 2100
Historical photographs, modern observations, and a simple space-for-time substitution approach predict that glacier mass loss from Svalbard is poised to double over the twenty-first century.
- Emily C. Geyman
- , Ward J. J. van Pelt
- & Jack Kohler
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Article |
The Montreal Protocol protects the terrestrial carbon sink
Modelling suggests that the Montreal Protocol may be mitigating climate change by protecting the land carbon sink, as well as by protecting the ozone layer and reducing greenhouse gas emissions.
- Paul J. Young
- , Anna B. Harper
- & Rolando R. Garcia
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Article |
Projected land ice contributions to twenty-first-century sea level rise
Efficient statistical emulation of melting land ice under various climate scenarios to 2100 indicates a contribution from melting land ice to sea level increase of at least 13 centimetres sea level equivalent.
- Tamsin L. Edwards
- , Sophie Nowicki
- & Thomas Zwinger
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Review Article |
Overshooting tipping point thresholds in a changing climate
Ongoing global warming is likely to cause tipping point thresholds to be passed, but an abrupt system change can still be avoided if the warming is reversed quickly relative to the timescale of the tipping element.
- Paul D. L. Ritchie
- , Joseph J. Clarke
- & Chris Huntingford
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Article |
Rate of mass loss from the Greenland Ice Sheet will exceed Holocene values this century
Rates of ice-mass loss from southwestern Greenland this century will exceed the maximum rate over the past 12,000 years, and would not be the result of natural variation.
- Jason P. Briner
- , Joshua K. Cuzzone
- & Sophie Nowicki
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Article |
The hysteresis of the Antarctic Ice Sheet
Modelling shows that the Antarctic Ice Sheet exhibits multiple temperature thresholds beyond which ice loss would become irreversible, and once melted, the ice sheet can regain its previous mass only if the climate cools well below pre-industrial temperatures.
- Julius Garbe
- , Torsten Albrecht
- & Ricarda Winkelmann
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Article |
Butterfly effect and a self-modulating El Niño response to global warming
Modelling experiments show that the El Niño response to global warming is self-modulating and depends on its historical variability; if current variability is high, future variability will be low.
- Wenju Cai
- , Benjamin Ng
- & Michael J. McPhaden
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Article |
Heat and carbon coupling reveals ocean warming due to circulation changes
A linear relationship between the storage of heat and carbon in global oceans in response to anthropogenic emissions is used to reconstruct the effect of circulation changes on past and future ocean warming patterns.
- Ben Bronselaer
- & Laure Zanna
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Article |
North Atlantic climate far more predictable than models imply
Current models are too noisy to predict climate usefully on decadal timescales, but two-stage post-processing of model outputs greatly improves predictions of decadal variations in North Atlantic winter climate.
- D. M. Smith
- , A. A. Scaife
- & L. Zhang
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Article |
Emergent constraint on Arctic Ocean acidification in the twenty-first century
Sea surface density observations in the Arctic Ocean reveal a relationship between the present-day surface water density and the anthropogenic carbon inventory and coincident acidification, suggesting that recent acidification projections are underestimates.
- Jens Terhaar
- , Lester Kwiatkowski
- & Laurent Bopp
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Article |
Asynchronous carbon sink saturation in African and Amazonian tropical forests
Unlike Amazonian forests, African forests have maintained their carbon sink until recently but by 2030 the African carbon sink will have shrunk by 14 per cent and the Amazonian sink will reach almost zero.
- Wannes Hubau
- , Simon L. Lewis
- & Lise Zemagho
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Article |
Large hydropower and water-storage potential in future glacier-free basins
Glacierized regions that are projected to become ice-free in this century could provide substantial water storage and hydroelectric power, according to this worldwide theoretical assessment.
- Daniel Farinotti
- , Vanessa Round
- & Harry Zekollari
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Letter |
Rapid expansion of Greenland’s low-permeability ice slabs
Observations and regional climate models show that the increasing coverage of ice slabs on the Greenland ice sheet could lead to a global sea-level rise of up to 74 millimetres by 2100.
- M. MacFerrin
- , H. Machguth
- & W. Abdalati
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Letter |
Committed emissions from existing energy infrastructure jeopardize 1.5 °C climate target
A comprehensive assessment of ‘committed’ carbon dioxide emissions—from existing and proposed fossil-fuel-based infrastructure—finds that these emissions may exceed the level required to keep global warming within 1.5 degrees Celsius.
- Dan Tong
- , Qiang Zhang
- & Steven J. Davis
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Article |
Twentieth-century hydroclimate changes consistent with human influence
Multiple observational datasets and reconstructions using data from tree rings confirm that human activities were probably affecting the worldwide risk of droughts as early as at the beginning of the twentieth century.
- Kate Marvel
- , Benjamin I. Cook
- & A. Park Williams
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Article |
Global environmental consequences of twenty-first-century ice-sheet melt
Increased meltwater from the Greenland and Antarctic ice sheets will slow the Atlantic overturning circulation and warm the subsurface ocean around Antarctica, further increasing Antarctic ice loss.
- Nicholas R. Golledge
- , Elizabeth D. Keller
- & Tamsin L. Edwards
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Article |
Revisiting Antarctic ice loss due to marine ice-cliff instability
By better quantifying uncertainties for marine ice-cliff instability, future Antarctic ice loss is predicted to be much lower than previously estimated.
- Tamsin L. Edwards
- , Mark A. Brandon
- & Andreas Wernecke
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Article |
Increased variability of eastern Pacific El Niño under greenhouse warming
Despite inter-model differences in predicting the details of the eastern Pacific El Niño, a robust increase in the corresponding sea surface temperature variability under greenhouse warming is found across models.
- Wenju Cai
- , Guojian Wang
- & Michael J. McPhaden
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Article |
Change in future climate due to Antarctic meltwater
Accounting for meltwater from the Antarctic Ice Sheet in simulations of global climate leads to substantial changes in future climate projections and identifies a potential feedback mechanism that exacerbates melting.
- Ben Bronselaer
- , Michael Winton
- & Joellen L. Russell
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Article |
Anthropogenic influences on major tropical cyclone events
Climate model simulations reveal that recent destructive tropical cyclones would have been equally intense in terms of wind speed but would have produced less rainfall if these events had occurred in pre-industrial climates, and in future climates they would have greater wind speeds and rainfall.
- Christina M. Patricola
- & Michael F. Wehner
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Brief Communications Arising |
Emergent constraints on climate sensitivity
- Martin Rypdal
- , Hege-Beate Fredriksen
- & Rebekka J. Steene
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Brief Communications Arising |
Climate constraint reflects forced signal
- Stephen Po-Chedley
- , Cristian Proistosescu
- & Benjamin D. Santer
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Brief Communications Arising |
Cox et al. reply
- Peter M. Cox
- , Mark S. Williamson
- & Chris Huntingford
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Brief Communications Arising |
Assumptions for emergent constraints
- Patrick T. Brown
- , Martin B. Stolpe
- & Ken Caldeira
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Letter |
Marine heatwaves under global warming
Satellite observations and Earth system model simulations reveal that marine heatwaves have increased in recent decades and will increase further in terms of frequency, intensity, duration and spatial extent.
- Thomas L. Frölicher
- , Erich M. Fischer
- & Nicolas Gruber
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Analysis |
Emerging trends in global freshwater availability
Analysis of 2002–2016 GRACE satellite observations of terrestrial water storage reveals substantial changes in freshwater resources globally, which are driven by natural and anthropogenic climate variability and human activities.
- M. Rodell
- , J. S. Famiglietti
- & M.-H. Lo
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Letter |
Global patterns of declining temperature variability from the Last Glacial Maximum to the Holocene
Temperature variability decreased globally by a factor of four between the Last Glacial Maximum and the Holocene epoch, as a result of changes in the meridional temperature gradient.
- Kira Rehfeld
- , Thomas Münch
- & Thomas Laepple
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Letter |
Emergent constraint on equilibrium climate sensitivity from global temperature variability
Equilibrium climate sensitivity—which remains the largest uncertainty in climate projections—is constrained to a ‘likely’ range of 2.2–3.4 K by taking into account the variability of global temperature about long-term historical warming.
- Peter M. Cox
- , Chris Huntingford
- & Mark S. Williamson
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Article |
Greater future global warming inferred from Earth’s recent energy budget
Models show that several aspects of Earth’s top-of-atmosphere energy budget and the magnitude of projected global warming are correlated, enabling us to infer that future warming has been underestimated.
- Patrick T. Brown
- & Ken Caldeira
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Letter |
Impact of a global temperature rise of 1.5 degrees Celsius on Asia’s glaciers
Models show that even if global temperature rise can be limited to 1.5 degrees Celsius, only about 65 per cent of glacier mass will remain in the high mountains of Asia by the end of this century, and if temperatures rise by more than this the effects will be much more extreme.
- P. D. A. Kraaijenbrink
- , M. F. P. Bierkens
- & W. W. Immerzeel
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Article |
Climate change drives expansion of Antarctic ice-free habitat
Permanently ice-free areas, home to almost all of Antarctica’s biodiversity, are projected, in the worst case, to expand by over 17,000 km2 as a result of climate change by the end of this century, with potentially deleterious consequences for the continent’s biodiversity.
- Jasmine R. Lee
- , Ben Raymond
- & Aleks Terauds
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Analysis |
Reconciling controversies about the ‘global warming hiatus’
Apparently contradictory conclusions regarding the ‘global warming hiatus’ are reconciled, strengthening the current scientific understanding that long-term global warming is extremely likely to be of anthropogenic origin.
- Iselin Medhaug
- , Martin B. Stolpe
- & Reto Knutti
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Letter |
Broadening not strengthening of the Agulhas Current since the early 1990s
The Agulhas Current has not intensified since the early 1990s, but has instead broadened as a result of more eddy activity.
- Lisa M. Beal
- & Shane Elipot
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Letter |
Evidence for climate change in the satellite cloud record
Satellite records show that the global pattern of cloud changes between the 1980s and the 2000s are similar to the patterns predicted by models of climate with recent external radiative forcing, and that the primary drivers of the cloud changes appear to be increasing greenhouse gas concentrations and a recovery from volcanic radiative cooling.
- Joel R. Norris
- , Robert J. Allen
- & Stephen A. Klein