Faculty of Science, PSU informed that PM2.5 in the South comes from the North of the country!!! Not Indonesian smoke
Asst. Prof. Dr. Helmut Durass, Lecturer of Physics Program physical science Faculty of Science, PSU, is looking at the smog in the region and the agricultural and forest fires as sources of such smog in Thailand and the region using satellite images.
It was found that the PM2.5 smog situation in southern Thailand is currently influenced by the burning of agricultural and forest areas in the northern and northwestern regions of Southeast Asia, including Thailand, and the neighboring countries such as Laos, Cambodia, Vietnam, and Myanmar.
Only during the Southwest Monsoon – when the wind is coming from southwest – smog from Indonesia can be transported to Southern Thailand. However, currently we have not yet Southwest Monsoon conditions. Further, satellite images reveal that the smog is covering larger parts of the Bay of Bengal and the Gulf of Thailand. Due to the transition phase between the Northeast and Southwest Monsoon the wind is not blowing strong, so the smog is not going away easily and fast.
There was previously published an opinion about the haze situation in Betong District, Yala Province that it was caused by Indonesia, but this is not true. These days, there are comparable only few fires there.
Active fires over the last 24 hours (from 18 April 12:00) over the region (left) and over the last 31 days (right) via firms.modaps.eosdis.nasa.gov
Asst. Prof. Dr. Helmut Durrast commented that “The PM2.5 smog situation will continue until the wind and rain conditions will change, especially the change to the Southwest Monsoon”, which will bring stronger winds and some rain.
It is advisable to track the weather via https://www.iqair.com/th/thailand or https://aqicn.org (in English, using Thai station data) During this time, people in the area refrain from activities that cause PM 2.5, such as burning agricultural material, forests material, and waste in open areas. In addition, it is advised wearing a mask for safety from PM 2.5 and COVID-19.