Using Discrete Wavelet Transforms For Analysis Of Frequency Correlation In Relative Humidity

Relative humidity is one of the thermodynamic parameters in atmosphere which has various effects on the climatic attributes in any region. Long term studying of this parameter can have useful results about the long term effects of climate change on the thermodynamic parameters of the atmosphere. In this research, correlation of relative humidity frequency was considered in three synoptic stations in Iran during the period of 55 years (from 1956 to 2010) using a new method called “Wavelet transform” and also the sequential Mann-Kendall test. Results show that long term stability of humidity status in arid and humid climates is more than semi-arid climates and this issue can be obviously seen in the low correlations of long term periods.