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Global warming hiatus is a apparent lull or slowdown in the rate of global surface temperature in the recent decades. This phenomenon casts a serious doubt about a conventional wisdom of the upward trending global temperature caused by human activities, known as anthropogenic climate change. Thus, there is on-going debate and continuous research efforts among climate change experts, geophysicists and statistician, to understand this apparently contradictory phenomenon.

Empirical findings
In an article published in Climatic Change, Rajaratnam et al. point out that an apparent lull in the recent rate of global warming that has been widely accepted as fact is actually an artifact arising from faulty statistical methods. Their rigorous and comprehensive statistical analysis clearly indicate four crucial facts on global warning hiatus: i) a hiatus in the trend in global temperatures, ii) a temperature trend that is statistically distinct from trends prior to the hiatus period, iii) a “stalling” of the global mean temperature, and iv) a change in the distribution of the year-to-year temperature increases.

Counter-evidence
However, Fumitaka Furuoka used the three-step econometric procedure to examine empirically global surface temperature during 1951–2012. His econometric analysis is able to detect the existence of global warming hiatus. In other words, his analyses substantiated the proposition of a lull in the recent rate of global warming and points that there had occurred a significant slowdown in global warming from the pre-hiatus period of 1977–1996 to the hiatus period of 1997–2012.