Pathfinder project products and its variability in the intraseasonal, seasonal, and interannual time scales. Significance Preliminary studies show that the GLA Pathfinder project products yield a reasonable description of the AHC and its variability. Results show that the seasonal variations of the hydrologic components are consistent with climatological observations.
Moisture is transported from the regions of positive forcing toward regions of negative forcing.
The moisture recycling time scale is much larger in the former, compared with the latter. On the large scale, rainfall and moisture convergence are highly correlated. Regional characteristics of these oscillations and their relationship with other components of the atmospheric hydrologic cycle are investigated. The analysis clearly reveals a premoistening of the tropical atmosphere approximately 10 days prior to enhanced convection over the western Pacific, followed by drying out of the Equatorial central and eastern Pacific. The water budget of the tropical western Pacific is strongly influenced by rainfall variability associated with these intraseasonal oscillations.