Temperature, Humidity and Air Quality Index Relationship

Temperature, Humidity and Air Quality Index RelationshipThe relationship in the midst of temperature and humidness and carry fibre index in Suzhou and JinanLixiu. Zhang in class twain. (Student ID 1514401038)Soochow University. College of Science and technologyAbstractThis is a study about the relationship among temperature and humidity and air graphic symbol in Suzhou and Jinan. A guesswork was formed that higher temperature and humidity can result in better air quality. The data was collected daily from may 12th to May 30th. Using simple linear regression model, the study found no significant correlation between these three variables in every Suzhou or Jinan.Introduction Air pollution today is becoming an increasingly serious issue in China. As incomes rise and priorities shift away from unless pursuing money to ensuring a better life, environmental awareness is also soaring. So to a greater extent and more attention has been paid to what affects air quality. This study tried and true to find the relationship between air quality and weather elementshumidity and temperature. Considering that high near-ground temperature will accelerate vertical air convection, which will dramatically reduce near-ground pollutants, a hypothesis was formed that the higher the temperature, the better the air quality. Another hypothesis was that higher humidity will cause better air quality, which is based on the fact that droplets in the air can combine solid particles like PM 2.5 to reduce air suspension.This study assessed the effect of humidity and temperature on air quality, in which humidity refers to relative humidity, expressed as a percent. The unit of temperature is . AQI is short of Air Quality Index, which is calculated from five major air pollutants O3, CO, SO2, NO2, and PM2.5. higher(prenominal) AQI value means a greater level of air pollution and greater health concern,which is shown as followsAQI0-5051-100101-150151-200201-300Levels of air pollutiongood moderateSlightly-pollutedModerately-pollutedHeavily-pollutedSuzhou and Jinan were elusive in this study. Suzhou, a major city located in southeastern Jiangsu Province, has a monsoon-influenced humid subtropical climate . As the capital of Shandong Province, Jinan has a torrid temperate continental monsoon climate with four distinct seasons. These two cities were chosen because they have similar climate except Suzhou is more humid. Thus they can be compared to obtain more reliable data.Sampling methods and schedule of data collection are presented in Method section. Tables and graphs are showed in Results part. Discussion part is the account of the data. A summary with recommendation of improvement follows in Conclusion part.MethodsThe data, containing the value of humidity, temperature and AQI, were collected daily at 3PM-4PM from May 12th to May 30th. To make it more representative and reliable, the data was collected in two cities and from two different sources www.nmc.cn ( th e website of National Meteorological Center ) and Moji APP. The final data was collected after canvass these two sources.ResultsThe data contains three variables from two cities, and is 19 days in total, from May 12th to May 30th. The data collection efforts was effectively carried out, and missing value were minimal (below 5%). Graphs and tables are shown as follows get wind 1 AQI VS temperature in Suzhou figure 2 AQI VS temperature in Jinanfigure 3 AQI VS humidity in Suzhoufigure 4 AQI VS humidity in JinanBased on the analysis of simple linear regression, the relationship between variables are revealed by regression equations, which are shown in the figures. R is also presented to show how well up the points fits. Note that figure 1 fits well except points (19,107) and (28,107), which is probably due to the low humidity on those two days. The peak value of AQI appeared in May 25th in Suzhou with 28 and humidity of 75%. For Jinan, the peak value lies in May 27th, with 18 and humi dity of 71%.Discussion Figure 1 presents the relationship between temperature and AQI in Suzhou. Though not significant, this figure does suggest a positive correlation between these two variables. In other words, the higher the temperature, the worse the air quality, which contradicts the first hypothesis higher temperature causes better air quality., As shown, most of the points fit well except for the two outliers as mentioned in last part, which pull down the value of R. While figure 2 shows no correlation between temperature and AQI in Jinan with R less than 0.1. Maybe this is because the human factor is more significant in Jinan .As for humidity, there are no correlation in either figure 3 or figure 4, with R=0.13012 in Suzhou and 0.00383 in Jinan. As humidity gets greater, the value of AQI hardly changes or changes irregularly, which suggests that the second hypothesis is also wrong. There is no relationship between humidity and AQI.ConclusionTo conclude, theres no significan t relationship between temperature and AQI. Although AQI turns higher as temperature goes up in Suzhou, the correlation is not so significant. Neither in Suzhou nor Jinan were the relationship found between humidity and AQI. This is because air quality is the result of combined effects of multi-factors, so its very hard to figure out the effects of a single variable.Limitations exist because the size of sample is too small. Bias is possible as the data was collected in two big cities, in which human factors are very significant, and thus rural area and other small cities are excluded in this research. I recommend that further research should collect abundant data and choose more representative cities or countries. Furthermore, if conditions allow, future researcher had better signalise the variable when analyzing how a specific variable affect air quality.ReferencesThe Website of National Meteorological Center. ( May, 2016). http//www.nmc.cn/.Moji Weather.(May, 2016). Moji Fengyun science and technology company.Appendix original data