original: events of 1816 january – june known as the " year without a summer " in the northern hemisphere due to global cooling caused by the mount tambora volcanic eruption that had occurred in 1815 .
simplifications: the phenomenon occured during the period of january to june in 1816 is known as " year without a summer " in the northern hemisphere . it was due to the global cooling that occurred as a result of volcanic eruption of the mount tambora in the year 1815 . 1 . events of january through june : known a the ' year without a summer ' in the northern hemisphere was due to global cooling caused by the mt . tambora volcanic eruption of 1815 . occurrences of 1816 january – june known as the " year without a summer " in the northern hemisphere due to global cooling caused by the mount tambora volcanic eruption that had happened in 1815 . events of 1816 january – june known as the " year without a summer " in the northern hemisphere due to global cooling caused when the volcano mount tambora erupted in 1815 . the events of 1816 january - june known as the " year without a summer " in the northern hemisphere due to worldwide cooling caused by the mount tambora volcanic eruption that had happened in 1815 . events of 1816 january - june known as the " year without a summer " in the northern hemisphere due to global cooling caused by the mount tambora volcanic eruption that had occurred in 1815 . events of 1816 january – june known as the " year without a summer " in the northern hemisphere due to global cooling caused by the mount tambora volcanic eruption that had happened in 1815 . the events of 1816 between january and june were known as " year without summer " because of global cooling in the northern hemisphere caused by the mount tambora volcanic eruption of 1815 .