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Title: Community climate simulations to assess avoided impacts in 1.5 and 2 °C futures

Journal Article · · Earth System Dynamics (Online)
 [1]; ORCiD logo [2];  [1];  [3]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [1];  [1];  [1];  [5]; ORCiD logo [6]; ORCiD logo [1]
  1. National Center for Atmospheric Research, Boulder, CO (United States)
  2. Texas A & M Univ., College Station, TX (United States). Dept. of Atmospheric Sciences
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of Colorado, Boulder, CO (United States). Dept. of Atmospheric and Oceanic Sciences, Inst. of Arctic and Alpine Research
  5. Sun Yat-Sen Univ., Guangzhou, (China). School of Atmospheric Sciences
  6. National Center for Atmospheric Research, Boulder, CO (United States); ETH, Zurich (Switzerland). Inst. for Atmospheric and Climate Science

The Paris Agreement of December 2015 stated a goal to pursue efforts to keep global temperatures below 1.5 °C above preindustrial levels and well below 2 °C. The IPCC was charged with assessing climate impacts at these temperature levels, but fully coupled equilibrium climate simulations do not currently exist to inform such assessments. Here, we produce a set of scenarios using a simple model designed to achieve long-term 1.5 and 2 °C temperatures in a stable climate. These scenarios are then used to produce century-scale ensemble simulations using the Community Earth System Model, providing impact-relevant long-term climate data for stabilization pathways at 1.5 and 2 °C levels and an overshoot 1.5 °C case, which are realized (for the 21st century) in the coupled model and are freely available to the community. We also describe the design of the simulations and a brief overview of their impact-relevant climate response. Exceedance of historical record temperature occurs with 60 % greater frequency in the 2 °C climate than in a 1.5 °C climate aggregated globally, and with twice the frequency in equatorial and arid regions. Extreme precipitation intensity is statistically significantly higher in a 2.0 °C climate than a 1.5 °C climate in some specific regions (but not all). The model exhibits large differences in the Arctic, which is ice-free with a frequency of 1 in 3 years in the 2.0 °C scenario, and 1 in 40 years in the 1.5 °C scenario. Significance of impact differences with respect to multi-model variability is not assessed.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1416921
Journal Information:
Earth System Dynamics (Online), Vol. 8, Issue 3; ISSN 2190-4987
Publisher:
European Geosciences UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 137 works
Citation information provided by
Web of Science

References (51)

The Evolution of Climate Sensitivity and Climate Feedbacks in the Community Atmosphere Model journal March 2012
Temperature-driven global sea-level variability in the Common Era journal February 2016
Quantifying the climate impacts of albedo changes due to biofuel production: a comparison with biogeochemical effects journal January 2014
Climate Change Projections in CESM1(CAM5) Compared to CCSM4 journal September 2013
Probabilistic cost estimates for climate change mitigation journal January 2013
The last decade of global anthropogenic sulfur dioxide: 2000–2011 emissions journal January 2013
Improved pattern scaling approaches for the use in climate impact studies: IMPROVED PATTERN SCALING APPROACHES journal May 2015
Changes in Susceptibility to Heat During the Summer: A Multicountry Analysis journal May 2016
Reactive greenhouse gas scenarios: Systematic exploration of uncertainties and the role of atmospheric chemistry: ATMOSPHERIC CHEMISTRY AND GREENHOUSE GASES journal May 2012
Pattern scaling: Its strengths and limitations, and an update on the latest model simulations journal January 2014
How positive is the feedback between climate change and the carbon cycle? journal April 2003
Global Carbon Budget 2016 journal January 2016
What would it take to achieve the Paris temperature targets?: ACHIEVING THE PARIS TEMPERATURE TARGETS journal July 2016
Emulating coupled atmosphere-ocean and carbon cycle models with a simpler model, MAGICC6 – Part 1: Model description and calibration journal January 2011
Half a degree additional warming, prognosis and projected impacts (HAPPI): background and experimental design journal January 2017
Energy system transformations for limiting end-of-century warming to below 1.5 °C journal May 2015
Origins of differences in climate sensitivity, forcing and feedback in climate models journal April 2012
The Community Earth System Model (CESM) Large Ensemble Project: A Community Resource for Studying Climate Change in the Presence of Internal Climate Variability journal August 2015
Paris Agreement climate proposals need a boost to keep warming well below 2 °C journal June 2016
The Association Between Extreme Precipitation and Waterborne Disease Outbreaks in the United States, 1948–1994 journal August 2001
Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly journal November 2009
Does extreme precipitation intensity depend on the emissions scenario?: SCENARIO DEPENDENCE OF EXTREME RAIN journal October 2015
Simulated differences in 21st century aridity due to different scenarios of greenhouse gases and aerosols journal February 2016
Anthropogenic contribution to global occurrence of heavy-precipitation and high-temperature extremes journal April 2015
Benefits of mitigation for future heat extremes under RCP4.5 compared to RCP8.5 journal January 2016
The Community Earth System Model: A Framework for Collaborative Research journal February 2013
Consequences of More Extreme Precipitation Regimes for Terrestrial Ecosystems journal October 2008
A Representative Democracy to Reduce Interdependency in a Multimodel Ensemble journal July 2015
Characterizing half-a-degree difference: a review of methods for identifying regional climate responses to global warming targets: Characterizing half-a-degree difference
  • James, Rachel; Washington, Richard; Schleussner, Carl-Friedrich
  • Wiley Interdisciplinary Reviews: Climate Change, Vol. 8, Issue 2 https://doi.org/10.1002/wcc.457
journal January 2017
Realizing the impacts of a 1.5 °C warmer world journal June 2016
Early onset of significant local warming in low latitude countries journal July 2011
Global Variation in the Effects of Ambient Temperature on Mortality: A Systematic Evaluation journal January 2014
High chance that current atmospheric greenhouse concentrations commit to warmings greater than 1.5 °C over land journal July 2016
Responses of terrestrial aridity to global warming journal July 2014
The representative concentration pathways: an overview journal August 2011
Ice-free Arctic at 1.5 °C? journal March 2017
September Arctic sea ice predicted to disappear near 2°C global warming above present: ARCTIC SEA ICE TO DISAPPEAR NEAR 2°C journal March 2012
Long-term sea-level rise implied by 1.5 °C and 2 °C warming levels journal June 2012
Can Paris pledges avert severe climate change? journal November 2015
Biophysical and economic limits to negative CO2 emissions journal December 2015
Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C journal January 2016
Uncertainty in climate change projections: the role of internal variability journal December 2010
Berkeley Earth Temperature Averaging Process journal January 2013
Climate Change 2013 – The Physical Science Basis book March 2014
The Closing Door of Climate Targets journal November 2012
Setting cumulative emissions targets to reduce the risk of dangerous climate change journal August 2009
Sea Ice Trends in Climate Models Only Accurate in Runs with Biased Global Warming journal August 2017
Future risk of record-breaking summer temperatures and its mitigation journal February 2016
Dam safety effects due to human alteration of extreme precipitation: DAM SAFETY AND EXTREME PRECIPITATION journal March 2010
Calculation of Average, Uncertainty Range, and Reliability of Regional Climate Changes from AOGCM Simulations via the “Reliability Ensemble Averaging” (REA) Method journal May 2002
Half a degree additional warming, prognosis and projected impacts (HAPPI): Background and experimental design text January 2017

Cited By (53)

Comparison of extreme temperature response to 0.5 °C additional warming between dry and humid regions over East–central Asia journal February 2019
Projected changes in mid–high‐latitude Eurasian climate during boreal spring in a 1.5 and 2°C warmer world journal September 2019
Multiple possibilities for future precipitation changes in Asia under the Paris Agreement journal February 2020
The use of the Community Earth System Model in human dimensions climate research and applications journal January 2019
Surface Temperature Evaluation and Future Projections Over India Using CMIP5 Models journal May 2019
Global Monsoon Changes under the Paris Agreement Temperature Goals in CESM1(CAM5) journal January 2019
Drylands climate response to transient and stabilized 2 °C and 1.5 °C global warming targets journal June 2019
Consistency of extreme temperature changes in China under a historical half-degree warming increment across different reanalysis and observational datasets journal January 2020
Differences between low-end and high-end climate change impacts in Europe across multiple sectors journal May 2018
Distinctive Evolutions of Eurasian Warming and Extreme Events Before and After Global Warming Would Stabilize at 1.5 °C journal February 2019
Detectable Impacts of the Past Half‐Degree Global Warming on Summertime Hot Extremes in China journal July 2018
Differential Impacts of 1.5 and 2 °C Warming on Extreme Events Over China Using Statistically Downscaled and Bias-Corrected CESM Low-Warming Experiment journal September 2018
High‐Temperature Extreme Events Over Africa Under 1.5 and 2 °C of Global Warming journal April 2019
Half‐a‐Degree Matters for Reducing and Delaying Global Land Exposure to Combined Daytime‐Nighttime Hot Extremes journal August 2019
Are the Observed Changes in Heat Extremes Associated With a Half‐Degree Warming Increment Analogues for Future Projections? journal August 2019
Contributions of aerosol‐cloud interactions to mid‐Piacenzian seasonally sea ice‐free Arctic Ocean journal August 2019
A novel method to test non-exclusive hypotheses applied to Arctic ice projections from dependent models journal July 2019
Ice-free Arctic projections under the Paris Agreement journal April 2018
Reduced probability of ice-free summers for 1.5 °C compared to 2 °C warming journal April 2018
Record-breaking climate extremes in Africa under stabilized 1.5 °C and 2 °C global warming scenarios journal April 2018
Higher CO2 concentrations increase extreme event risk in a 1.5 °C world journal June 2018
Reduced heat exposure by limiting global warming to 1.5 °C journal June 2018
Changing population dynamics and uneven temperature emergence combine to exacerbate regional exposure to heat extremes under 1.5 °C and 2 °C of warming journal February 2018
Changes in a suite of indicators of extreme temperature and precipitation under 1.5 and 2 degrees warming journal March 2018
Differences, or lack thereof, in wheat and maize yields under three low-warming scenarios journal May 2018
Evaluating the accuracy of climate change pattern emulation for low warming targets journal May 2018
Temperature and precipitation extremes under current, 1.5 °C and 2.0 °C global warming above pre-industrial levels over Botswana, and implications for climate change vulnerability journal June 2018
Economic and biophysical impacts on agriculture under 1.5 °C and 2 °C warming journal November 2018
Increased population exposure to extreme droughts in China due to 0.5 °C of additional warming journal June 2019
Enhanced flood risk with 1.5 °C global warming in the Ganges–Brahmaputra–Meghna basin journal July 2019
Extreme precipitation over East Asia under 1.5 °C and 2 °C global warming targets: a comparison of stabilized and overshoot projections journal August 2019
The utility of the historical record for assessing the transient climate response to cumulative emissions
  • Millar, Richard J.; Friedlingstein, Pierre
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 376, Issue 2119 https://doi.org/10.1098/rsta.2016.0449
journal April 2018
Coordinating AgMIP data and models across global and regional scales for 1.5°C and 2.0°C assessments
  • Rosenzweig, Cynthia; Ruane, Alex C.; Antle, John
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 376, Issue 2119 https://doi.org/10.1098/rsta.2016.0455
journal April 2018
The Paris Agreement objectives will likely halt future declines of emperor penguins journal November 2019
An Investigation of Parameter Sensitivity of Minimum Complexity Earth Simulator journal January 2020
Regional Temperature Response in Central Asia to National Committed Emission Reductions journal July 2019
Approaches to attribution of extreme temperature and precipitation events using multi-model and single-member ensembles of general circulation models journal January 2019
Arctic amplification under global warming of 1.5 and 2 °C in NorESM1-Happi journal January 2019
Improving the representation of anthropogenic CO2 emissions in climate models: impact of a new parameterization for the Community Earth System Model (CESM) journal January 2018
Global drought and severe drought-affected populations in 1.5 and 2 °C warmer worlds journal January 2018
Changes in extremely hot days under stabilized 1.5 and 2.0 °C global warming scenarios as simulated by the HAPPI multi-model ensemble journal January 2018
Midlatitude atmospheric circulation responses under 1.5 and 2.0 °C warming and implications for regional impacts journal January 2018
Projections of East Asian summer monsoon change at global warming of 1.5 and 2 °C journal January 2018
Projected increases in magnitude and socioeconomic exposure of global droughts in 1.5 and 2 °C warmer climates journal January 2020
Past and future interannual variability in Arctic sea ice in coupled climate models journal January 2019
Assessing the dynamic versus thermodynamic origin of climate model biases text January 2018
Evaluating the accuracy of climate change pattern emulation for low warming targets text January 2018
Midlatitude atmospheric circulation responses under 1.5 and 2.0 degrees C warming and implications for regional impacts text January 2018
Half a degree and rapid socioeconomic development matter for heatwave risk journal January 2019
Different multi-year mean temperature in mid-summer of South China under different 1.5 °C warming scenarios journal September 2018
Changes in extremely hot days under stabilized 1.5 and 2.0 °C global warming scenarios as simulated by the HAPPI multi-model ensemble text January 2018
The role of prior assumptions in carbon budget calculations journal January 2020
Assessments of the Northern Hemisphere snow cover response to 1.5 and 2.0 °C warming journal June 2018

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