What question did this study set out to answer?

To examine global and tropical rainfall variability across a 27-year record and isolate the influences of ENSO, volcanic eruptions, and long-term climate trends.

August 1, 2007Journal of Climate

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

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Authors

GGGuojun GuEarth System Science Interdisciplinary Center RARobert F. AdlerSUNY Downstate Health Sciences University GHGeorge J. HuffmanGoddard Space Flight Center

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Implication

Climatological time-series analysis reveals increasing tropical ocean rainfall and decreasing land precipitation from 1979 to 2005, indicating shifting hydrologic regimes across the Tropics.

Key Points

To examine global and tropical rainfall variability across a 27-year record and isolate the influences of ENSO, volcanic eruptions, and long-term climate trends.
Analyzed the 27-year (1979–2005) Global Precipitation Climatology Project (GPCP) monthly dataset focusing on the Tropics (25°S–25°N).
Applied statistical techniques to quantify and isolate anomalies associated with ENSO and major volcanic eruptions (El Chichón in 1982 and Mount Pinatubo in 1991).
Tropical ocean precipitation increased at a linear rate of 0.06 mm day⁻¹ decade⁻¹ (~5.5% overall increase), while tropical land precipitation decreased at −0.01 mm day⁻¹ decade⁻¹ (~1% overall decrease).
Major volcanic eruptions reduced tropical rainfall by approximately 5% across both land and ocean regions.
ENSO events shifted precipitation distributions between tropical land and ocean with opposing signs without significantly changing total tropical rainfall.

Cite This Study

Gu et al. (2007) studied this question.

synapsesocial.com/papers/6a1e7e4d09554abc3868e1a9 https://doi.org/10.1175/jcli4227.1

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Implication

Climatological time-series analysis reveals increasing tropical ocean rainfall and decreasing land precipitation from 1979 to 2005, indicating shifting hydrologic regimes across the Tropics.

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

Discussion

Member takes

Implication

Key Points

Cite This Study

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

Discussion

Member takes

Implication

Key Points

Cite This Study

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