'Unusually warm' may become the norm
BY THE end of the century, Singapore could experience more unusually warm days, with average surface temperatures going up by as much as 4.6 deg C.
The mean daily temperature here could range from 28.8 to 30.1 deg C for the years 2070 to 2099. And, if no global mitigation action is carried out to reduce greenhouse emissions, temperatures could increase to 30.3 to 32 deg C, compared with 27.4 deg C during the baseline period of 1980 to 2009.
The mean maximum daily temperature could go up to 34.9 to 36.7 deg C, compared to the baseline of 31.8 deg C.
These are some of the findings from Phase 1 of the Second Climate Change Study, released by the Meteorological Service Singapore's (MSS') Centre for Climate Change Research Singapore yesterday.
"The findings imply that the unusually warm temperatures Singapore encounters occasionally could become the norm in the future, and that the days with record temperatures above those experienced historically will become more frequent," said MSS in a media release.
"Due to the high levels of humidity in Singapore, these projected rises in temperature will lead to increasing thermal discomfort and heat stress for those working outdoors," it added.
The study aims to provide key projections of changes in main climate variables of interest to Singapore, such as temperatures, rainfall and rises in sea level.
Phase 1 of the study was commissioned by the National Environment Agency in collaboration with the Met Office Hadley Centre in Britain, under the government-formed Inter-Ministerial Committee on Climate Change.
The findings on rainfall showed an increasing trend in the intensity and frequency of heavy rainfall events over Singapore, especially during the wetter season.
MSS said that the contrast between the wetter and drier months is "projected to become more pronounced".
"The study projects an upward trend in seasonal mean rainfall during the wet season of November to January, as well as greater dryness during months that are already relatively drier in the current climate," added MSS.
The months of February and June to September are relatively drier compared to other times of the year.
Phase 2 of the study, which was started last year, will make use of the projections from Phase 1 to examine the climate change impacts on areas such as biodiversity and greenery, as well as water resources and drainage.
The key findings can be expected by the end of this year.