[1]ZHANG Yue-cong,ZHANG Cai-yu,CHENG Fu-wei,et al.Multi-Time Scale Analysis of Temperature and Precipitation in Recent 58 Years in Chengde City[J].Research of Soil and Water Conservation,2012,19(05):70-73.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 05
Page number:
70-73
Column:
Public date:
2012-10-20
- Title:
-
Multi-Time Scale Analysis of Temperature and Precipitation in Recent 58 Years in Chengde City
- Author(s):
-
ZHANG Yue-cong1, ZHANG Cai-yu2, CHENG Fu-wei1, MENG Xian-feng1, YANG Yi-tian3
-
1. Hebei Normal University for Nationalities, Chengde, Hebei 067000, China;
2. College of Environmental Sciences, Peking University, Beijing 100871, China;
3. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
-
- Keywords:
-
wavelet analysis; temperature; precipitation; scale effect; Chengde City
- CLC:
-
P332.6
- DOI:
-
-
- Abstract:
-
By using Mexican Hat Wavelet to analyze the multi-scale characteristics of the temperature and precipitation data for 696 months during 1951-2008 to determine the main cycle in the sequences and test by the Mann-Kendall method, the conclusion has been drawn that the overall climate feature in Chengde was that small scale change was embedded in the large-scale complex background. Temperature sequence data showed the general cycle was 14 a, 6 a and 2 a, and 14 a was the main cycle. Precipitation sequence data revealed the general cycle was the 11 a, 4 a and 1 a, and 4 a was the main cycle. The main cycle 14 a of the temperature sequence showed the state of alternation of cold and warm and the overall trend of temperature rise in the multi-scale background before 21 century. The main cycle 4 a of the precipitation sequence showed the alternation of wetness and drought, and the sharp reduction of rainy years and less precipitation.