Future extreme climate changes linked to global warming intensity

Area of Science:

• Climate Science
• Environmental Science
• Meteorology

Background:

• The Coupled Model Intercomparison Project Phase 5 (CMIP5) provides crucial data for understanding climate change.
• Representative Concentration Pathways (RCPs) offer standardized scenarios for future greenhouse gas emissions.
• Investigating terrestrial extreme climate changes is vital for adaptation and mitigation strategies.

Purpose of the Study:

• To analyze projected changes in terrestrial extreme climate events under sustained global warming.
• To assess the sensitivity of temperature and precipitation extremes to increasing global mean temperatures.
• To compare model uncertainties in projecting temperature versus precipitation extremes.

Main Methods:

• Utilizing the CMIP5 daily dataset for climate change analysis.
• Employing the Representative Concentration Pathways 8.5 (RCP8.5) scenario for future projections.
• Statistical analysis of extreme temperature, precipitation, and dry spell indices.

Main Results:

• Significant increases in extreme temperatures, precipitation, and dry spells are projected for the 21st century.
• Cold extremes show greater sensitivity to global warming than warm extremes.
• Nonlinear relationships observed between global warming and certain temperature extremes (e.g., cold nights, days) after 3°C warming.

Conclusions:

• Global warming under RCP8.5 will lead to more frequent and intense terrestrial extreme climate events.
• Temperature extremes exhibit a stronger linear relationship with global mean temperature changes compared to precipitation extremes.
• Model uncertainty in projecting precipitation extremes increases notably beyond 5°C global warming.