ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Establishment and Change Analysis of Temperature Element Sequences in Guiyang over the Last Century
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
Based on the complete monthly reports of the maximum and minimum temperatures recorded by instruments since the establishment of the Guiyang National Reference Meteorological Station on September 5, 1920, the sequences of the maximum and minimum temperatures and the daily temperature differences over the past century in Guiyang were established. Through multiple methods of verification of the sequences, it was found that the minimum temperature and the daily temperature differences from 1938 to 1944 had significant differences from the mean value of the sequences, and there were breakpoints in the sequences in 1937, 1944 and 2000. According to the historical evolution, observation record books and weather report stubs, as well as the comparison of multi-source and multi-station data, the minimum and maximum temperatures from 1938 to 1944 in the reports were found to be inaccurate, thus the data for this period were replaced with the records from the observation record books. Using the mean value of daily maximum and minimum temperatures and the daily temperature differences from 1938 to 1949, a conversion and correction scale was established to construct the daily temperatures for the period from 1921 to 1936 when there were no records. The non-uniformity of temperature caused by station relocation was revised recursively by using the initial values of this station and the annual changes of the optimal reference station. The final established homogenized temperature series of Guiyang over the past century shows a good consistency with the global temperature changes during the same period. The results show that over the past century, Guiyang"s temperature has experienced two relatively significant "warming", one from 1937 to 1953 and the other one starting from 1978, the current warming accelerated in 1996 and changed abruptly in 2011. The tendency rate of temperature change in Guiyang over the past century is 0.122℃ per decade to 0.136℃ per decade, and the minimum temperature has been oscillating upward since 1929, warming up with a tendency rate of 0.26℃ per decade to 0.31℃ per decade. The daily temperature differences decreases with a tendency rate of -0.27℃ per decade to -0.29℃ per decade. There is no obvious trend change in the maximum temperature. The warming rate of temperature and minimum temperature in autumn and winter is higher than that in spring and summer, February is the month of most warming, and July is the month of least warming. The warming is mainly caused by the increase in minimum temperature.
Keywords:
Project Supported:
Clc Number:
Mobile website
