NEW YORK: Scientists have said the warming effect of cosmic rays on Earth is “modest” on inter-annual timelines only, declaring no causal link on longer term timelines between the planet’s 20th century warming trend and the rays, The Washington Post reports.
The authors of the study, published in the US Proceedings of the National Academies of Science, wrote: “We find no measurable evidence of a causal effect linking CR to the overall 20th-century warming trend; however, on short interannual timescales, we find a significant, although modest, causal effect of CR (cosmic rays) on short-term, year-to-year variability in GT [global temperature].”
The researchers said the rays could affect the climate in the short-term, but not the long-term.
“Thus, although CR clearly do not contribute measurably to the 20th-century global warming trend, they do appear as a nontraditional forcing in the climate system on short interannual timescales, providing another interesting piece of the puzzle in our understanding of factors influencing climate variability.”
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