Lake Taihu Monthly Dissolved CO2 Concentrations from Satellite Data, 2002-2018

Lake Taihu's monthly average dissolved carbon dioxide concentrations from July 2002 to December 2018, estimated using MODIS satellite data. The dataset was created by Tianci Qi of the Chinese Academy of Sciences and has a reported coefficient of determination (R²) of 0.84 against field observations. It reveals significant seasonal dynamics and a declining annual trend of 0.80 μmol L⁻¹ per year.

Use Cases

• Analyzing seasonal and spatial dynamics of dissolved CO2 in Lake Taihu based on the described low summer/autumn and high winter/spring patterns.
• Validating satellite-derived water quality algorithms based on the reported RMSE and UPD metrics against field observations.
• Studying long-term trends in lake carbon emissions based on the reported declining annual average of 0.80 μmol L⁻¹ yr⁻¹.
• Comparing satellite-estimated limnological parameters with traditional field datasets based on the monthly time scale alignment mentioned.

Strengths

• Model performance is quantified with a coefficient of determination (R²) of 0.84 and an RMSE of 11.81 μmol L⁻¹ for daily estimates.
• Covers a substantial time period from July 2002 to December 2018, enabling long-term trend analysis.
• Includes an uncertainty assessment indicating the monthly product may overestimate by about 30% under the influence of all input variables.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file size are unknown, which may limit suitability assessment for specific computational tasks.
• The dataset is derived from satellite estimates with inherent uncertainty, as noted by the reported overestimation and error metrics.

Provenance

Source

Tianci Qi, Chinese Academy of Sciences

Collection Method

Estimated from MODIS-derived chlorophyll-a, lake surface temperature, and photosynthetically active radiation parameters, then averaged to monthly scale.

Time Range

July 2002 to December 2018

Geography

Lake Taihu, China