Final answer:
When the AMO is in a warm phase, there is a significant increase in the number of tropical cyclones in the Atlantic. This trend is attributed to warmer sea surface temperatures providing more energy for storm development.
Step-by-step explanation:
The question relates to the Atlantic Multidecadal Oscillation (AMO), which is a climatic cycle that influences the sea surface temperature of the North Atlantic Ocean over several decades. When the AMO is in a warm phase, as it is currently, there is a significant increase in the number of tropical cyclones. This trend has been observed in recent data; for example, the 2020 hurricane season was especially active with a record number of named storms.
This increase is connected to greater ocean warmth providing more energy for storm development. Other side effects of increased greenhouse gas emissions and their potential impacts include shifts in marine populations, potential run-away greenhouse effects, more intense weather extremes, longer droughts, and ocean acidification, all of which can influence the frequency and intensity of these storms.