Interpolation of XCO2 Retrieved from GOSAT in China using Fixed Rank Kriging

Cong Zhou; Runhe Shi; Wei Gao

doi:10.1117/12.2020946

24 September 2013 Interpolation of XCO₂ retrieved from GOSAT in China using fixed rank kriging

Cong Zhou, Runhe Shi, Wei Gao

Proceedings Volume 8869, Remote Sensing and Modeling of Ecosystems for Sustainability X; 88690L (2013) https://doi.org/10.1117/12.2020946
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The Greenhouse Gases Observing Satellite (GOSAT) can provide high accuracy column-averaged dry air mole fractions of carbon dioxide (XCO₂). However, the observations have large gaps due to the impact of the cloud and observational modes. Although kriging interpolation yields the best linear unbiased predictor, it would be computationally expensive for a large dataset. Fixed Rank Kriging (FRK) is based on the Spatial Random Effect (SRE) model and it assumes that the process of interest can be expressed as a linear combination of spatial basis functions, plus a fine-scale-variation component. The FRK predictors and standard errors can be computed rapidly. This paper analyzes the FRK prediction of GOSAT Level 2 XCO₂ data over China and shows that the FRK prediction is consistent with other kriging methods (e.g., ordinary kriging). In addition, the result agrees well with the CO₂ measurements from the stations at Mt. Waliguan and Shangdianzi.

Citation Download Citation

Cong Zhou, Runhe Shi, and Wei Gao "Interpolation of XCO₂ retrieved from GOSAT in China using fixed rank kriging", Proc. SPIE 8869, Remote Sensing and Modeling of Ecosystems for Sustainability X, 88690L (24 September 2013); https://doi.org/10.1117/12.2020946

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