Wavelet analysis of the annual discharge records of the world’s largest rivers
Saved in:
| Title: | Wavelet analysis of the annual discharge records of the world’s largest rivers |
|---|---|
| Authors: | Labat, David1 labat@lmtg.obs-mip.fr |
| Source: | Advances in Water Resources. Jan2008, Vol. 31 Issue 1, p109-117. 9p. |
| Subjects: | Wavelets (Mathematics), Water temperature, Hydrologic cycle, Earth sciences |
| Abstract: | Abstract: The determination of the temporal variability of water resources is of high importance with respect to long-term water policy. This contribution provides a wavelet-based global analysis of 55 large river discharge fluctuations located on the five continents. It shows that large river runoff records should be considered as valuable climatic proxies (such as temperature or precipitation records) since discharge series integrate intermittent 4-year and longer processes. Effectively, continuous Morlet wavelet analysis allows to identify statistically significant bands of intermittent fluctuations from interannual 5–8-year to decadal, 12–15-year, bidecadal, 28-year fluctuations and 4–70-year considering the longest time series available in Europe and North America. Reasonable physical relationships between land–water cycle oscillations and climate forcings (such as ENSO or NAO) are documented and investigated but all these results should later on be more systematically confirmed by cross-wavelet analyses. [Copyright &y& Elsevier] |
| Copyright of Advances in Water Resources is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
Be the first to leave a comment!
