Sunday, April 14, 2024

UoN professor explains unusual Nairobi temperatures and storms

January 2024 has been recorded as the most well liked month on document to date worldwide.

Gilbert Ouma, the coordinator of the College of Nairobi’s Institute for Local weather Change and Adaptation, and an affiliate professor on the Division of Meteorology, solutions some key questions.

The annual common temperatures for Nairobi are usually average, between 24°C and 25°C on the upper aspect and 17°C-18°C on the decrease aspect.

These are usually very comfy temperatures. Nevertheless, within the December-January-February interval, most temperatures are usually excessive, ranging between 26°C and 27°C.

This 12 months, temperatures in February went as much as between 29°C and 30°C, even hitting 31°C. That is about 6°C larger than regular Nairobi temperatures.

That may be a large distinction and our our bodies are certain to really feel the distinction. If such a rise is sustained for a very long time, it will possibly result in a warmth wave.

However in Nairobi’s case, the excessive temperatures have been on and off, so we are able to’t actually speak of a warmth wave. What Nairobi has had is a wave of sizzling climate that the human physique can simply alter to.

The winds that move over Kenya from December to February yearly are from the north. They blow primarily by continental areas, together with some deserts. These winds circulate in waves and periodically deliver sizzling climate, the sort that has prevailed not too long ago throughout east Africa.

The temperatures which are prevailing in Kenya are additionally dictated by the trail that the winds take from the north. If the trail is straight (over land mass), then we find yourself with these excessive temperatures that we have now skilled within the early months of 2024.

If the winds comply with a path that curves into the Indian Ocean, then the temperatures get moderated, leading to cooler climate and rainfall in Kenya and different components of East Africa.

Additionally, due to local weather change, common international temperatures are rising. The temperatures final 12 months have been the best on document. So the comparatively excessive temperatures that we usually expertise throughout this season (December-January-February) could also be significantly larger.

One other factor to notice is that the December to February season is all the time a dry season in Kenya, however December and January of 2024 have been moist due to the late El Niño rains.

The El Niño phenomenon is generally skilled on this area inside the September-October-November season. The temperatures which have been speculated to be excessive in December and January have been due to this fact moderated by these rains. So, when the rains ceased, the same old warmth out of the blue set in, making February really feel highly regarded.

Kenya and its japanese African neighbours have all skilled the recent climate. The area is now transferring in direction of the March-April-Could season when the rainfall belt comes again across the equator and the solar can be overhead. The rainfall is predicted to average the excessive temperatures.

Apart from the recent climate right now of 12 months, the worldwide local weather is altering and common international temperatures are rising.

The annual temperature for Africa has been rising at a mean charge of 0.13°C per decade since 1910, however this has greater than doubled to 0.28°C since 1981.

The traditional minimal temperatures and the utmost temperatures are rising. This can result in modifications in extremes, resembling storms.

A storm is a manner that the environment discharges extra vitality to regain equilibrium. When the vitality builds within the environment as much as over sure ranges, the surplus has to go someplace.

The surplus vitality build-up as a result of greenhouse gasoline impact, which results in local weather change, requires dissipation. That is often achieved by intense storms, resulting in extra frequent excessive rainfall occasions.

However, the opposite excessive of very low rainfall can even happen, and so we’ll get extra droughts. The full quantity of rains will go up in some locations and down in others.

There can even be an influence on ecosystems. A variety of species won’t survive the altering local weather. For example, mosquitoes can not thrive in temperatures under 17°C and above 35°C. So when the typical temperatures of locations transcend this vary, mosquitoes would discover it tough to outlive.

Nevertheless, the temperatures of some locations whose temperatures weren’t inside this vary could change and get inside it. For such locations, malaria will turn into an issue when beforehand there was no malaria there.

The long run impact could be dangerous on individuals’s well being. It may result in warmth stroke and continual circumstances such kidney illness, hypertension and heart problems. It may additionally trigger respiratory issues resembling bronchial asthma.

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