wind/pressure relationship

[weatherwindow]

while i am not very familiar with the pacific basin, just a quick glance at a few prelimims suggested that a different wind/pressure relationship exists in TC in that basin as compared to the atlantic. it appears that any given windspeed is associated with a lower pressure in the pacific than in our neighborhood. is this true and, if so, why?........thanks, rich

[SouthernWx]

In the tropical Pacific, average sea level barometric pressures are lower than in the Atlantic Basin.

Thats why a 960 mb tropical cyclone in the tropical Atlantic normally corresponds to a 100 kt cat-3....but only a 85-90 kt typhoon in the WPAC.