Relationship between el nino and hurricanes

The El Niño forecast has changed, what it means for hurricane season | WeatherPlus

relationship between el nino and hurricanes

El Niño is the warm phase of the El Niño Southern Oscillation (commonly called ENSO) and is . An El Niño connection with flooding was reported in by Víctor The effects of the CP El Niño are different from those of the traditional EP El Niño—e.g., the recently discovered El Niño leads to more hurricanes more. ), the relationship of TC intensity with ENSO has not been explored. To overlap with the ENP hurricane season, El Niño (La Niña) events are defined by . The traditional El Nino tends to reduce the number of Atlantic hurricanes. at in general by Japanese and Korean researchers, but not in relation to hurricanes.

El Niño and Atlantic Tropical Cyclones

Email El Nino may have a split personality. The warming of the tropical Pacific Ocean has long been known to affect weather around the world, but researchers now say it may come in two forms with different impacts. The traditional El Nino tends to reduce the number of Atlantic hurricanes. Modoki, from Japanese, refers to something that is "similar but different. Indeed, it was first noticed by Peruvian fishermen, who named it after the baby Jesus because it tended to first appear around Christmastime.

El Niño and Atlantic Tropical Cyclones

In El Nino Modoki, on the other hand, the warming occurs farther to the west, in the central Pacific. It's not clear why this new form is occurring, said Peter J. Webster, a professor at Georgia Tech's School of Earth and Atmospheric Sciences and a co-author of a report on the finding in Friday's edition of the journal Science.

El Nino could lead to quiet hurricane season

Regardless of the cause, improved understanding of El Nino and it's cold-water counterpart La Nina could help atmospheric scientists better forecast weather, including the number of Atlantic hurricanes. Traditionally, La Nina has been associated with more Atlantic hurricanes than normal and El Nino with fewer. Over the Atlantic basin, the anomalous upper-level ridge is associated with weaker upper- and lower- level winds, both of which reduce the vertical wind shear and increased hurricane activity.

The warm phase of the AMO is associated with high-activity eras for Atlantic hurricanes, such as has been in place since Conversely, the cold phase of the AMO is associated with low-activity eras such as the period A key atmospheric feature of this pattern is a stronger West African monsoon, which produces a westward extension of the upper-level easterly winds near 35, ftalong with weaker easterly trade winds in the lower atmosphere near 5, ft.

relationship between el nino and hurricanes

This wind pattern is very conducive to increased Atlantic hurricane activity, partly because it results in weaker vertical wind shear. The weaker trade winds also contribute to a more conducive structure i.

At the same time, these wind patterns are associated with a more northward push into the MDR of deep tropical moisture and unstable air, each of which also favors stronger hurricanes.

Interaction with El Niño: how hurricane frequency may be affected

The hurricane activity in a given season often reflects a combination of the multi-decadal signals and ENSO. Leading tropical modes associated with interannual and multi-decadal fluctuations in North Atlantic hurricane activity. The recent increase in Atlantic hurricane activity:

relationship between el nino and hurricanes