Intense tropical storms lose force sooner after they leave the water
Across 885 tropical cyclones from 1979 to 2024, winds of at least 29 metres per second lost intensity 18.6 percent faster once the storm was ashore. Weaker storms in that storm set stayed inland 14.5 percent longer. Warmer seas, added moisture and a longer ocean influence sit with the weaker group. Faster travel, steadier air and drier ground sit with the stronger group.
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Strong storms fade inland, weaker ones linger
The paper's sample is 885 tropical cyclones and the years run from 1979 to 2024. The fast-fade group is defined by wind at or above 29 metres per second. For that group the post-landfall loss of strength is 18.6 percent quicker. Storms under the cutoff remained over land 14.5 percent longer. Both percentages come from that one analysis.[1]
What the measurements separate
Weaker, longer-lived storms line up with warmer surface water, extra moisture in the air, and a track that keeps the ocean's influence. Storms that break up sooner line up with quicker movement, more stable air, and soil that is drier. The paper's numerical experiments separate those links. A single decay curve draws the rapid coastal drop and the longer inland spell together.[1]
Two percentages on 885 storms
The desk column on the same study is a reader link beside the Nature Communications paper. The figures above are the paper's figures. Stronger cyclones are the ones that fade at a faster pace inland, while the weaker storms linger. The sample is 885 tropical cyclones from 1979 through 2024. Winds at or above 29 metres per second lost strength 18.6 percent faster after landfall. Storms under that cutoff lasted 14.5 percent longer inland. Weaker storms line up with warmer seas, extra moisture and a longer ocean influence. Stronger storms line up with faster travel, steadier air and drier ground. Numerical experiments in the paper separate those links. One decay curve draws the fast coastal drop and the longer inland spell in one picture. The desk column discusses the same study. The magnitude is those two percentages on 885 storms, not a forecast for the next season.[1]
Related columns
For more information on this topic, you can read the related columns.