Daytime Temperature Trend Analysis in the City of Jakarta, Indonesia

2 Abstract: Temperature changes according to land use patterns become a common phenomenon in many cities around the globe. Various techniques and methods used to show the trend of temperature changes according to land use pattern in the city. One method is using temperature traverse. Based on this method of temperature measurements the north-south and east-west traverses were monitored and conducted in the city of Jakarta for the period from October 2012 to March 2013. Both the temperature traverses were carried out between 11:00 and 13:00 hrs. In general, the study found that the average monthly temperature is 34.9°C for the north south traverse with the CV of 4.4 and east-west traverse is 34.4°C with the CV of 5.6. Additionally, there was also the average temperature on weekdays (HK ) for the north south and east west of 35.3°C with the CV of 3.0 and 34.8°C with the CV of 2.6 respectively. Thus, the average temperature at the time of the holidays ( HC ) for the north south and east west were 34.4°C and 33.7°C, respectively with the CV of 2.2 and 1.1. Furthermore highest monthly temperature trends are occurring in October of 36.2°C for the north south and 37.7°C for the east-west traverses. Conversely, the lowest in November with an average value of 33.4°C for the north-south traverse, meanwhile the lowest temperature trends for the east-west traverse in the months of November and February with an average value of monthly temperature is 32.5°C. Based on observations obtained through the temperature traverse the average value of the urban heat island intensity for the north-south traverse is 2.0 °C while for the east - west traverse is 0.7°C. The observed temperature values are very high, particularly in the HK, thus producing an impact of discomfort feeling among the city of Jakarta dwellers.