Exploring the relationship between polar motion and a natural river's runoff based on Granger causality
文献类型：会议论文
| 作者 | Wang Sheng(王盛) ; Liu Suxia |
| 出版日期 | 2013 |
| 会议名称 | 2013 Symposium H02, IAHS-IAPSO-IASPEI Assembly, July 22, 2013 - July 26, 2013 |
| 会议日期 | July 22, 2013 - July 26, 2013 |
| 会议地点 | Gothenburg, Sweden |
| 关键词 | Runoff Climate change Landforms Rivers Statistical tests |
| 页码 | 131-138 |
| 英文摘要 | Assessing the sensitivity of cold and mountain hydrological systems to climate change needs long-term hydrological data. The data in cold and mountain regions are either available on the very short-term, or absolutely unavailable due to high elevation and cold environments, which are hard to access for conducting field observations. In order to explore the possibility of whether we can seek assistance from some already existing long-term data in other disciplines to fill the blank of data of river flow in these regions, the relationship between the runoff of Yarlung Zangbo, a natural river in Tibet, China, and polar motion, which has data records from 1864 up to the present, is explored. First, the action path framework was structured based on geophysical principles. The Granger causality test was conducted at monthly, seasonal and annual time scales. It is found that on a monthly scale the X component of polar motion influences the runoff at the lag being from the 1st to the 21st month, with the 9th month being an exception. The Y component of polar motion influences the runoff at the lag from the 1st to the 9th month and from the 17th to the 24th month. At seasonal scale, the influence of the X component of polar motion on river runoff can be seen in the 2nd season (i.e. from the 4th month to the 6th month). The influence of the Y component of polar motion on river runoff can be seen at seasonal scale from the 4th to the 6th season (i.e. from the 10th month to 18th month). We cannot see evidence of Granger causality from polar motion to river runoff at annual scales. For the Granger influence of river runoff to polar motion, it is found that at monthly scale the influences are prominent at the lag being from the 3rd to the 25th months for the X component and from the 3rd to the 25th for the Y component. At seasonal scale, these influences can be seen at the lag from the 2nd to the 8th season (corresponding to the 4th to 24th months) for the X component and at the lag from the 1 st to the 8th season (corresponding to from the 1 st to the 24th month) for the Y component. Again, at the annual scale no evidence of Granger causality can be found from runoff to polar motion. The different behaviours at monthly, seasonal and annual scale suggest that using the monthly data of polar motion to obtain the monthly runoff data is more practicable than to borrow the data from polar motion for river runoff at seasonal and annual scale. 2013 IAHS Press. |
| 收录类别 | EI |
| 会议录 | IAHS-AISH Proceedings and Reports
 |
| 会议录出版者 | IAHS Press |
| ISSN号 | 1447815 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/31047]  |
| 专题 | 地理科学与资源研究所_研究生部 |
| 推荐引用方式 GB/T 7714 | Wang Sheng,Liu Suxia. Exploring the relationship between polar motion and a natural river's runoff based on Granger causality[C]. 见:2013 Symposium H02, IAHS-IAPSO-IASPEI Assembly, July 22, 2013 - July 26, 2013. Gothenburg, Sweden. July 22, 2013 - July 26, 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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