Tropical Rainfall Variability on Interannual-to-Interdecadal and Longer Time Scales Derived from the GPCP Monthly Product

Oceanic forcing of Sahel rainfall on interannual to interdecadal time scales.

We present evidence, based on an ensemble of integrations with NSIPP1 (version 1 of the atmospheric general circulation model developed at NASA's Goddard Space Flight Center in the framework of the Seasonal-to-Interannual Prediction Project) forced only by the observed record of sea surface temperature from 1930 to 2000, to suggest that variability of rainfall in the Sahel results from the resp...

Interannual and Interdecadal Variability of the South Atlantic Convergence Zone

Interannual variations of the summertime (January−March) atmospheric circulation over subtropical South America are examined during the period 1958–97 using the NCEP/NCAR Reanalysis data. It is found from an empirical orthogonal function (EOF) analysis that an anomalous upper-tropospheric stationary eddy in the lee of the Andes tends to accompany a dipole in anomalous vertical motion. An anomal...

The Interannual and Interdecadal Variability in Hurricane Activity

Interannual Variability of Sea Surface Temperature in the Eastern Tropical Pacific Ocean and Central American Rainfall

Title of Document: INTERANNUAL VARIABILITY OF SEA SURFACE TEMPERATURE IN THE EASTERN TROPICAL PACIFIC OCEAN AND CENTRAL AMERICAN RAINFALL Kristopher B. Karnauskas, Ph.D., 2007 Directed By: Professor Antonio J. Busalacchi Department of Atmospheric and Oceanic Science Sea surface temperature (SST) in the east Pacific warm pool (EPWP) plays a potentially important role in Central American rainfall...

SIXTH INTERNATIONAL WORKSHOP on TROPICAL CYCLONES Topic 4.1 : Variability of Tropical Cyclone Activity/Intensity on Intraseasonal and Interannual Scales

Topic 4.1 reviews the current status of the understanding on variability of tropical cyclone (TC) activity/intensity on intraseasonal to interannual time scales around the globe. Annually, approximately 80−90 TCs occur over the tropical oceans (Neumann 1993). The TC activities depend on thermodynamic parameters (e.g., sea surface temperature (SST), atmospheric stability, and mid-tropospheric mo...