Complex sentence: In Greenland, the event started at 8175 BP, and the cooling was 3.3 ° C (decadal average) in less than 20 years, and the coldest period lasted for about 60 years, and the total duration was about 150 years.
Split into simpler sentences: In Greenland, the event started at 8175 BP, and the cooling was 3.3 ° C (decadal average) in less than 20 years. The coldest period lasted for about 60 years, and the total duration was about 150 years.