Before 1998, global temperatures were increasing almost at the same rate as greenhouse gases in the atmosphere. But after 1998, global warming hiatus started and during the years that followed, temperatures were increasing, but not at the same pace as they were projected by climate models.
This aspect baffled researchers across the globe. But a new research has a reason about what led to the hiatus. Researchers from the Lawrence Livermore National Laboratory (LLNL) said that volcanic activity may be responsible for the hiatus.