Historic climate variability of wetness in East China (960-1992): A wavelet analysis
- National Climate Center, Beijing (China)
- Universitaet Hamburg (Germany)
In this paper, a dataset of historic wetness is analyzed with the wavelet transform technique. A previous dataset was derived from historic documents, and consists of annual dryness/wetness grades from 1 to 5 at 120 stations in the China mainland for the period from 1470 to 1979. This dataset was extended back to AD 960 for six regions in East China in a previous study, and the extended dataset is used in this paper. The Mexican Hat wavelet transform technique and descriptive statistical analysis were used to analyze each of the six regional time series. The wavelet analysis of climatic fluctuation displayed variations of different time scales at particular time points, as well as persistent anomalies. The climatic variations occuring on longer time scales may cover a larger area; these are the outstanding persistent dry and wet stages during the last 1033 years. The variations on longer time scales coincide roughly with those previously identified. On shorter time scales, some synchronous fluctations are also observed but in fewer years. 8 refs., 4 figs.
- OSTI ID:
- 535514
- Report Number(s):
- CONF-970207-; TRN: 97:005076-0046
- Resource Relation:
- Conference: 77. annual meeting of the American Meteorological Society, Long Beach, CA (United States), 2-7 Feb 1997; Other Information: PBD: 1997; Related Information: Is Part Of Eighth symposium on global change studies; PB: 402 p.
- Country of Publication:
- United States
- Language:
- English
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