总结了当前国内外基于遥感信息监测土壤水分的原理和方法，特别是对数据同化法进行了着重阐述。

The principle and methods of monitoring the soil moisture based on remote sensing information are reviewed. Especially much attention was paid on the data assimilation method.

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以一维水温模型为例，利用伴随算子法进行海洋观测数据同化，以便给水温的数值预报提供一个较准确的初始场。

To carry out the data assimilation of sea temperature observations the adjoint method is applied, which can provide an accurate initial temperature field for numerical prediction.

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