JOURNAL OF NATURAL RESOURCES ›› 2016, Vol. 31 ›› Issue (6): 1027-1040.

• Resource Evaluation •

### Variations and Periodic Symmetry of Temperature and Precipitation in Inner Mongolia Section of the Yellow River Basin during 1951-2012

HUANG Xing, MA Long, LIU Ting-xi, WANG Jing-ru, LIU Dan-hui

1. College of Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China
• Received:2015-01-15 Online:2016-06-20 Published:2016-06-20
• Supported by:
Inner Mongolia Natural Science Fund Projects, No. 2014MS0407 and 2010BS0608; Inner Mongolia Autonomous Region Innovation Team on Water Resources Efficiency of Semi-arid Regions Affected by Hydrological Processes and Its Regulation Technology;National Natural Science Foundation of China, No. 50869005.

Abstract: The Inner Mongolia section of the Yellow River Basin is the important economy development zone of Inner Mongolia. The research on the changes of climatic factors has great significance on the water resource reservation, ecological environmental protection and local economic and social development in the basin. Based on the data of temperature and precipitation collected from 52 meteorological stations in the research area and the surrounding areas from 1951 to 2012, this thesis adopted the methods of regression analysis, comparison of annual average, 5-year moving average, climate tendency and Mann-Kendall test to analyze the variations of temperature and precipitation and their interrelationship. The results indicate that in recent 62 years the annual average temperature, the annual maximum average temperature and the annual minimum average temperature all show obvious rising trends (0.283 ℃/10 a, 0.235 ℃/10 a and 0.590 ℃/10 a), especially in the 1990s. The temperature in winter increased most significantly, which contributed most to the warming effect. These three kinds of temperature experienced a mutation respectively in 1988, 1989 and 1982. There is great variation of the annual precipitation and it shows a declining tendency (-1.48 mm/10 a), but the falling range is not big. The relationship of the average annual precipitation has good positive correlations with the average annual temperature, the annual average maximum temperature and the annual average minimum temperature in the 1980s and 1990s, while the relations showed antisymmetric change in other periods. From the seasonal perspective, the correlations between the seasonal precipitation and the seasonal average temperature, the seasonal average maximum temperature and the seasonal average minimum temperature in spring are the highest; the correlation of the precipitation and the temperature in summer is similar to the interannual variation; the trend of the precipitation is antisymmetric to the temperature in autumn; the trend of the precipitation and temperature in winter was antisymmetric from the 1990s and was consistent in other periods.

CLC Number:

• P467