| The impact of vertical measurement depth on the information content of soil moisture times series data | |
| Qiu J. X. ; Crow W. T. ; Nearing G. S. ; Mo X. G. ; Liu S. X. | |
| 2014 | |
| 关键词 | sequential assimilation ers scatterometer near-surface validation products filter |
| 英文摘要 | Using a decade of ground-based soil moisture observations acquired from the United States Department of Agriculture's Soil Climate Analysis Network (SCAN), we calculate the mutual information (MI) content between multiple soil moisture variables and near-future vegetation condition to examine the existence of emergent drought information in vertically integrated (surface to 60 cm) soil moisture observations (theta(0-60) ([cm])) not present in either superficial soil moisture observations (theta(5) ([cm])) or a simple low-pass transformation of theta(5). Results suggest that while theta(0-60) is indeed more valuable than theta(5) for predicting near-future vegetation anomalies, the enhanced information content in theta(0-60) soil moisture can be effectively duplicated by the low-pass transformation of theta(5). This implies that, for drought monitoring applications, the shallow vertical penetration depth of microwave-based theta(5) retrievals does not represent as large a practical limitation as commonly perceived. |
| 出处 | Geophysical Research Letters |
| 卷 | 41 |
| 期 | 14 |
| 页 | 4997-5004 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0094-8276 |
| 内容类型 | SCI/SSCI论文 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29642]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Qiu J. X.,Crow W. T.,Nearing G. S.,et al. The impact of vertical measurement depth on the information content of soil moisture times series data. 2014. |
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