Name
Title | ||
|---|---|---|
Modeling The Spatial Dynamics Of Soil Organic Carbon Using Remotely-Sensed Predictors In Fuzhou City, China |
Abstract | ||
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Assessing the spatial dynamics of soil organic carbon (SOC) is essential for carbon monitoring. Since variability of SOC is mainly attributed to biophysical land surface variables, integrating a compressive set of such indices may support the pursuit of an optimum set of predictor variables. Therefore, this study was aimed at predicting the spatial distribution of SOC in relation to remotely sensed variables and other covariates. Hence, the land surface variables were combined from remote sensing, topographic, and soil spectral sources. Moreover, the most influential variables for prediction were selected using the random forest (RF) and classification and regression tree (CART). The results indicated that the RF model has good prediction performance with corresponding R-2 and root-mean-square error (RMSE) values of 0.96 and 0.91 mg center dot g(-1), respectively. The distribution of SOC content showed variability across landforms (CV = 78.67%), land use (CV = 93%), and lithology (CV = 64.67%). Forestland had the highest SOC (13.60 mg center dot g(-1)) followed by agriculture (10.43 mg center dot g(-1)), urban (9.74 mg center dot g(-1)), and water body (4.55 mg center dot g(-1)) land uses. Furthermore, soils developed in bauxite and laterite lithology had the highest SOC content (14.69 mg center dot g(-1)). The SOC content was remarkably lower in soils developed in sandstones; however, the values obtained in soils from the rest of the lithologies could not be significantly differentiated. The mean SOC concentration was 11.70 mg center dot g(-1), where the majority of soils in the study area were classified as highly humus and extremely humus. The soils with the highest SOC content (extremely humus) were distributed in the mountainous regions of the study area. The biophysical land surface indices, brightness removed vegetation indices, topographic indices, and soil spectral bands were the most influential predictors of SOC in the study area. The spatial variability of SOC may be influenced by landform, land use, and lithology of the study area. Remotely sensed predictors including land moisture, land surface temperature, and built-up indices added valuable information for the prediction of SOC. Hence, the land surface indices may provide new insights into SOC modeling in complex landscapes of warm subtropical urban regions. |
Year | DOI | Venue |
|---|---|---|
2021 | 10.3390/rs13091682 | REMOTE SENSING |
Keywords | DocType | Volume |
soil organic carbon, remotely sensed predictors, biophysical indices, land use, landform, lithology | Journal | 13 |
Issue | Citations | PageRank |
9 | 0 | 0.34 |
References | Authors | |
0 | 7 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Terefe Hanchiso Sodango | 1 | 0 | 0.34 |
| Sha Jinming | 2 | 1 | 2.99 |
| Xiaomei Li | 3 | 0 | 1.01 |
| Tomasz Noszczyk | 4 | 0 | 0.68 |
| Jiali Shang | 5 | 0 | 0.68 |
| Abreham Berta Aneseyee | 6 | 0 | 0.34 |
| Zhongcong Bao | 7 | 0 | 0.34 |