The work sits at the crossroads of two ocean rhythms: El Niño, which sets the pulse of the Pacific, and the AMO, which slowly shifts North Atlantic temperatures. Nearby in the archive are studies on predicting El Niño a year and a half ahead, the heat pump of Enceladus's ocean, and the edge of the ocean conveyor belt. All touch on how the ocean breathes and how that breath echoes in the atmosphere. This paper adds specifics: how these two pendulums jointly shape the hurricanes that batter coastlines.
The author compiled tracks of 483 tropical cyclones from the IBTrACS archive from 1950 to 2023, focusing on storms stronger than 64 knots. For each storm, coordinates, wind speed, and pressure were recorded every three hours. These data were then compared with three indices: the Oceanic Niño Index (ONI) for El Niño phases, the AMO index from NOAA ERSSTv5, and monthly sea surface temperature on a 2°×2° grid. Future temperatures were estimated using the CMIP6 model from the National Center for Atmospheric Research under the high-emissions scenario SSP5-8.5.
Warm AMO phases coincide with more hurricanes: on average 22.5 hurricanes per decade versus 17 in cool phases. Cyclone energy, measured by the ACE index, was about 400 units higher in warm decades, and in the 2000s it nearly doubled the 1970s level. La Niña and neutral phases produce more landfalling hurricanes, with peak wind speeds reaching 165 and 170 knots respectively, while El Niño caps at 155 knots. North Atlantic sea surface temperatures are rising faster than models predict: actual 2023 values match model projections for 2040.
Neighboring papers treat ocean oscillations as separate phenomena: El Niño predictability, conveyor stability, heat fluxes. Here, three factors are woven into a single picture and tested against a long hurricane record. The difference is that this work doesn't just note a link; it shows how phases from two different oceans combine into a concrete seasonal risk for coastlines. This is the first test of the combined influence of the AMO and ENSO on hurricane frequency and intensity using data through 2023.
The topic could evolve toward finer attribution: how much comes from local Atlantic warming versus remote Pacific influence via atmospheric waves. Regional high-resolution models could assess risk for specific coastal stretches. Given that real temperatures outpace scenarios, revising late-century hurricane intensity projections will be important.
The results matter for seasonal hurricane forecasting, insurance, and coastal infrastructure planning.
Include post-tropical cyclones that retain hurricane force, and use more detailed sea surface temperature data.
The work addresses the open question of how natural climate variability (ENSO, AMO) interacts with anthropogenic warming to shape extreme weather. It remains unclear how much ocean warming amplifies rapid intensification and how that will affect the frequency of catastrophic landfalls.
This section is addressed to the author of the paper and their colleagues. Neighbouring works were found by meaning-based search across our archive, not by word overlap. We do not review: we show the field around the work.
What the work does
The study links the behavior of tropical cyclones in the North Atlantic to the phases of El Niño, the Atlantic Multidecadal Oscillation, and sea surface temperature, based on observational data from 1950 to 2023. It shows that warm phases of the AMO increase the frequency and intensity of hurricanes, while La Niña favors their landfall. It is noted that the rise in sea surface temperature outpaces climate models, which may indicate stronger hurricanes in the future.
Where its strength is
The strength of the work lies in combining three factors (AMO, ENSO, and sea surface temperature) into a unified picture of seasonal hurricane risk. The use of a long observational record up to 2023 allows seeing the joint influence of two oceanic oscillations on the frequency, intensity, and landfall of cyclones.
Where it could go next
Worth trying
Nearby works in our archive
The archive is sparse around this work: the closest review is only 0.51, against a usual 0.64. It looks like few have drilled nearby.
From 2020 to 2023, five major hurricanes of category 3 or higher struck the United States, compared to three over the entire previous decade.
In Kim Stanley Robinson's novel 'Forty Signs of Rain', climate scientists try to predict abrupt changes in ocean currents and their weather impacts, echoing efforts to link slow ocean oscillations to hurricane activity.