The CPTEC team has done an excellent work at providing a simple and detailed explanation on the underlying concepts used by their forecast model, called BRAMS (for Brazilian developments on the Regional Atmospheric Modelling System). The picture below (from the CPTEC) is giving an insight on the workflow for their model (source -> transport -> deposition).
As there is also a huge demand for PM2.5 monitoring for Thailand (especially Chiang Mai and Bangkok), or for more station in Vietnam (Ho Chi Minh City), the extension will also cover selected countries with existing network.
With the recent Southeast Asia Smog from Indonesia affecting Singapore and now Malaysia, we got many questions about why there is a difference between the data which can be read from Singapore NEA website (nea.gov.sg) and the World Air Quality Index project Singapore webpage.
Since I did not have the answer to his question, I just dropped an email to Francis Chu from the Singapore totobobo┬о mask manufacturing company, who replied in almost no time:
If you have concerns about some stations reporting lower PM2.5 data compared to others, then refer to the following graphics; they show the relative PM2.5 reporting for the last 5 days for each of the above mentioned stations:
For more information, please refer to the Shanghai AQI update explanations. The following graphics show the relative PM2.5 AQI data for Chengdu stations on which the overall Chengu AQI is based.
For more information, please refer to the Shanghai AQI update explanations. The following graphics show the relative PM2.5 AQI data for Beijing stations on which the overall Beijing AQI is based.