Long-Term Characteristic of Visibility in Thailand and Its Related Meteorological Factors
การศึกษาทัศนวิสัยระยะยาวในประเทศไทยและความสัมพันธ์กับปัจจัยทางอุตุนิยมวิทยา
by Ladda Tasaso; ลัดดา ทะสะโส; Pakpong Pochanart; ภัคพงศ์ พจนารถ; National Institute of Development Administration. The Graduate School of Environmental Development Administration
Title: | Long-Term Characteristic of Visibility in Thailand and Its Related Meteorological Factors การศึกษาทัศนวิสัยระยะยาวในประเทศไทยและความสัมพันธ์กับปัจจัยทางอุตุนิยมวิทยา |
Contributor(s): | National Institute of Development Administration. The Graduate School of Environmental Development Administration |
Advisor: | Pakpong Pochanart
ภัคพงศ์ พจนารถ |
Issued date: | 7/1/2023 |
Publisher: | National Institute of Development Administration |
Abstract: |
Visibility is an important factor in our daily life and visibility is considered a standard meteorological parameter. The objective was to study the Long-Term Characteristic of Visibility in Thailand and Its Related Meteorological Factors. A research study of secondary data consisting of visibility data, cloud data, relative humidity data and rainfall data for a weather 3 hours for 10 years (2009 - 2018) of 43 stations (from all regions in Thailand). To study the variation and analyze the correlation by using the Rescaling (min-max normalization) analysis of visibility and meteorological factors. The results of the study that the diurnal variation and diurnal correlation of visibility and meteorological factors were consistent. Relative humidity has the greatest impact on changes in visibility diurnal variation and this results in low visibility because of the 24-hour variations of the relative humidity and light scattering of aerosols depends on ambient relative humidity since hygroscopic particles absorb significant water at high relative humidity. The factor affecting relative humidity and cloud was air temperature, diurnal variation of pressure, physical characteristics of measurement area and measurement time. The seasonal variation and seasonal correlation of visibility and meteorological factors in each region was different. The main factors affecting the correlation of visibility and meteorological factors are topography and seasons. This also includes forest fires and burning in agricultural areas. The problem of forest fires and burning in agricultural areas is a factor contributing to an increase in the amount of dust and smog. Especially in areas in the upper part of the country which has mostly continental areas such as the North, the Northeast, the Central and the East. There is a correlation of visibility with meteorological factors in the direction variation. During the dry season or summer, there is low relative humidity and low precipitation. During the dry season or summer, there is low relative humidity and low rainfall, including the occurrence of forest fires and burning in agricultural areas resulting in low visibility. While the southern region of the country. This is an area with precipitation is abundant all year, In the Southern region which is maritime characteristic the humidity is relatively higher, and the southern region is under the influence of monsoon winds of seasonal, resulting the correlation of visibility with meteorological factors there is a correlation in the inverse direction variation. |
Description: |
Master of Science (Environmental Management) (M.S.(Environmental Management)) |
Keyword(s): | ทัศนวิสัย ; ความชื้นสัมพัทธ์ ; ปัจจัยทางอุตุนิยมวิทยา
Visibility; Relative Humidity; Meteorological Factors |
Type: | Thesis วิทยานิพนธ์ |
Language: | th |
Rights: | National Institute of Development Administration |
URI: | https://repository.nida.ac.th/handle/662723737/6166 |
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