1. Impact of ENSO and Volcanoes on Tropical Precipitation
Original Monthly Series
Derived ENSO ocean and land signals
Derived volcano impact-up to 5%
Derived data set with ENSO and volcanic signals “removed”-note reduced amplitude of variations
NEWS PI: Adler
Gu et al. (2007) J. Clim (in press)

2. Is Rainfall Increasing in the Tropics?
Time Series of Annual Totals (Tropics)
Original Series of Annual Means
2005-largest annual tropical rainfall in series
Modified Series of Annual Means with ENSO and Volcanoes “Removed”
Gu, G., R. Adler, G. Huffman, and S. Curtis , 2007: Tropical Rainfall Variability on Interannual-to-Interdecadal/Longer-Time Scales Derived from the GPCP Monthly Product, J. Climate, (in press).
Linear positive change 5% over ocean and 3% over ocean/land combined--statistically significant at ≥ 99%. May indicate long-term precipitation change signal.
NEWS PI: Adler