The Decadal Climate Prediction Project (DCPP) is a major international scientific initiative designed to bridge the gap between short-term weather forecasting and long-term climate projections. Operating as part of the Coupled Model Intercomparison Project (CMIP) under the World Climate Research Programme (WCRP), the DCPP focuses on the “near-term”—the critical window spanning from 1 year to a decade into the future. The Core Problem: Why the 10-Year Window is Difficult
Predicting the climate 10 years out is uniquely challenging because it sits at the intersection of two different types of physics problem:
Long-term projections (30–100 years) are primarily forced boundary-value problems. They rely heavily on external drivers, such as projected human greenhouse gas emissions scenarios (SSPs/RCPs).
Near-term predictions (1–10 years) are dominated by internal climate variability. Natural, cyclical fluctuations—such as the El Niño-Southern Oscillation (ENSO) or the Atlantic Multidecadal Variability (AMV)—often overpower the gradual signal of global warming over short timelines.
The DCPP solves this by initializing climate models with real-world observational data. By feeding contemporary ocean temperatures, salinity, sea ice extent, and atmospheric states into the computer models, scientists ensure the simulation starts with an accurate representation of current natural cycles. Decadal Climate Prediction Project Overview
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