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首页> 外文会议>IEEE International Geoscience and Remote Sensing Symposium >Assessment of the newest ECV soil moisture product over the Tibetan plateau using ground-based observations
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Assessment of the newest ECV soil moisture product over the Tibetan plateau using ground-based observations

机译：利用地面观测资料评估青藏高原最新ECV土壤水分产物

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Validation of the remotely sensed soil moisture products is very important for data application and the refinement of the retrieval algorithms. In the study, we evaluated three newest soil moisture products that are the essential climate variable (ECV) soil moisture products (active-only, passive-only, and merged active-passive) which are the first multi-decadal satellite-based soil moisture data sets released by the European Space Agency recently. In-situ measurements used for validation are from three networks established in the Tibetan Plateau. The results show that all the ECV products can capture the soil moisture dynamics well. The active product performs better than the passive product when adding the Advanced Scatterometer (ASCAT) data set and is less sensitive to vegetation cover, but both of them overestimate the ground measurements and exhibit higher variation than in-situ data. Overall, the combined product outperforms other two products. It can preserve the relative dynamics of the active and passive products very well and the number of observations is also improved, indicating a positive effect by merging both active and passive data sets in the Tibetan Plateau.
机译：遥感土壤水分产品的验证对于数据应用和完善检索算法非常重要。在这项研究中，我们评估了三种最新的土壤水分产品，它们是基本气候变量（ECV）土壤水分产品（仅主动，仅被动和合并的主动-被动），这是第一个多年代基于卫星的土壤水分欧洲航天局最近发布的数据集。用于验证的原位测量来自青藏高原建立的三个网络。结果表明，所有ECV产品都能很好地捕获土壤水分动态。添加高级散射仪（ASCAT）数据集时，有源产品的性能要优于无源产品，并且对植被的覆盖度不那么敏感，但是与原位数据相比，这两种产品都高估了地面测量值并显示出更高的变化。总体而言，合并后的产品胜过其他两个产品。它可以很好地保留主动和被动产品的相对动态，并且观察次数也得到了改善，通过合并青藏高原的主动和被动数据集表明了积极的效果。

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