Dataset Information

A 21-year dataset (2000-2020) of gap-free global daily surface soil moisture at 1-km grid resolution.

ABSTRACT: Global soil moisture estimates from current satellite missions are suffering from inherent discontinuous observations and coarse spatial resolution, which limit applications especially at the fine spatial scale. This study developed a dataset of global gap-free surface soil moisture (SSM) at daily 1-km resolution from 2000 to 2020. This is achieved based on the European Space Agency - Climate Change Initiative (ESA-CCI) SSM combined product at 0.25° resolution. Firstly, an operational gap-filling method was developed to fill the missing data in the ESA-CCI SSM product using SSM of the ERA5 reanalysis dataset. Random Forest algorithm was then adopted to disaggregate the coarse-resolution SSM to 1-km, with the help of International Soil Moisture Network in-situ observations and other optical remote sensing datasets. The generated 1-km SSM product had good accuracy, with a high correlation coefficent (0.89) and a low unbiased Root Mean Square Error (0.045 m³/m³) by cross-validation. To the best of our knowledge, this is currently the only long-term global gap-free 1-km soil moisture dataset by far.

SUBMITTER: Zheng C

PROVIDER: S-EPMC10017679 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature

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A 21-year dataset (2000-2020) of gap-free global daily surface soil moisture at 1-km grid resolution.

Zheng Chaolei C Jia Li L Zhao Tianjie T

Scientific data 20230315 1

Global soil moisture estimates from current satellite missions are suffering from inherent discontinuous observations and coarse spatial resolution, which limit applications especially at the fine spatial scale. This study developed a dataset of global gap-free surface soil moisture (SSM) at daily 1-km resolution from 2000 to 2020. This is achieved based on the European Space Agency - Climate Change Initiative (ESA-CCI) SSM combined product at 0.25° resolution. Firstly, an operational gap-fillin ...[more]

PMID: 36922510

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Dataset Information

A 21-year dataset (2000-2020) of gap-free global daily surface soil moisture at 1-km grid resolution.

Publications

A 21-year dataset (2000-2020) of gap-free global daily surface soil moisture at 1-km grid resolution.

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