A new data assimilation system to improve precipitation forecast

Data assimilation systems can provide accurate initial fields for further improving numerical weather prediction (NWP). Since 2008, Tian Xiangjun and his team at the Institute of Atmospheric Physics (IAP) of the Chinese Academy of Sciences have been devoted to developing the nonlinear least-squares 4-D ensemble variational data assimilation method (NLS-4DVar).

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