Influence of hurricane-related activity on North American extreme precipitation
Article first published online: 22 FEB 2011
Copyright 2011 by the American Geophysical Union.
Geophysical Research Letters
Volume 38, Issue 4, February 2011
How to Cite
2011), Influence of hurricane-related activity on North American extreme precipitation, Geophys. Res. Lett., 38, L04705, doi:10.1029/2010GL046258.(
- Issue published online: 22 FEB 2011
- Article first published online: 22 FEB 2011
- Manuscript Accepted: 19 JAN 2011
- Manuscript Revised: 6 JAN 2011
- Manuscript Received: 23 NOV 2010
- extreme precipitation;
- North America
Despite the catastrophic societal costs of hurricanes and considerable recent attention to possible trends, little is known about the general contribution of hurricane-related activity to extreme precipitation over North America and the underlying dynamics. Here, a 25-year observational analysis of daily data shows important contributions to extreme events over large regions of North America, including a pronounced signal over northern and inland areas, with an average span of influence extending to several hundred kilometers. Over large areas of the Northeast, there are stations where more than two-thirds of all extreme events are linked to hurricane-related activity. Large-scale vertical velocity, maximum wind speed, and tropical/extratropical character are shown to be important factors in the strength and range of influence. Analysis of dynamical factors, including buoyancy, moisture availability, and lifting, show the largest changes in lifting, with rising motion typical of the deep tropics occurring over inland and northern latitudes.