This study puts the purpose on the clarification of the ascending and descending temperature in applicable mean monthly temperature compare to the former month for a year (Jan∼Dec) on every observatories in Korea, the clarification of the distributi...
This study puts the purpose on the clarification of the ascending and descending temperature in applicable mean monthly temperature compare to the former month for a year (Jan∼Dec) on every observatories in Korea, the clarification of the distribution of the Seasonal Index, it was defined as follows, a sum of extream value of both ascending and desending temperature for a year, and the clarification of the correlation about this index and two factors, annual range and latitude which should seem having most close with Seasonal Index.
For this study, I have used the data of mean monthly temperature which had been observed at meteorological observatories in Korea during last 30 years(1931∼1960).
The results may be summarized as follows.
⑴ Boardering to August in which ascending coexists with descending, the temperature descends for five months from september to next January and ascends for six months from February to July.
⑵ As going from the south to the north, the trend of changing more and more increases. The means that the nearer to the north, the larger the influence of the continent.
⑶ When the range or the breadth of changing is large, the isopleth has symmetry or a fixed form. But a time in opposition to this it disperes alone.
⑷ The maximum temperature of ascending is in March and that of descending is in December.
These two months are in the winter season in which the north-west monsoon commonly prevails.
⑸ In March, the prevailing north west monsoon grows weak. And that time, the temperature has the largest ascension and breadth.
⑹ January, the next month of December in which the temperature descends most, is the coldest month, and in February, one month after January, the temperature ascends over all the region for the first time.
⑺ The change for three months of the Summer which influences the agricultural crops growth is the lowest through all the seasons, this means that the monthly march of the regional difference is not large in summer, and in this period, the temperature is controlled by north pacific airmass.
⑻ When the latitude or the annual range gets large, the Seasonal Index tends to increase. Especially this index is higher in the west coast region than in the east coast region except the inland region at the average condition.
⑼ Two factors, annual range (x_2) and latitude(x_3) to Seasonal Index(x_1) is in correlation of high degree in simple or partial correlation respectively, and the correlation of Seasonal Index(x_1) and annual range(x_2) is higher than that of Seasonal Index(x_1) and latitude(x_3).