Climatic irregular staircases: generalized acceleration of global warming

Area of Science:

• Climate Science
• Earth System Science
• Environmental Science

Background:

• Existing studies on global warming rates often use limited time periods and starting years, hindering a comprehensive global view.
• Previous methods for determining climatic trends, such as stairstep averaging and linear least squares fitting, have been used exclusively.

Purpose of the Study:

• To conduct an exhaustive parametric analysis of global temperature data to uncover a broader range of global warming rates.
• To develop and apply an original hybrid method for deriving a novel type of climatic trend.
• To provide a more complete picture of global warming by exploring an unexplored space of rate values.

Main Methods:

• Performed an exhaustive parametric analysis on NASA GISS LOTI and HadCRUT4 data.
• Systematically varied the starting year (1880-2002), averaging period (5-30 years), and ending year.
• Developed and applied a hybrid method combining stairstep averaging and linear least squares fitting for trend determination.

Main Results:

• An overall acceleration of global warming was detected across all averaging periods.
• 99.9% of the 3029 analyzed Earth climatic irregular staircases show an increasing trend.
• Starting the analysis with an El Niño year generally resulted in lower global warming rates, unless volcanic cooling occurred concurrently.

Conclusions:

• The study reveals a consistent acceleration in global warming, irrespective of the chosen averaging period.
• The findings generalize and align with several existing results in climate science literature.
• The comprehensive analysis provides robust evidence of a rising global temperature trend.