The cannula is a climatological phenomenon where summer rains decrease and temperature increases. It lasts approximately 40 days and starts in mid -July. Summer is characteristically of warm temperatures, but with it comes the phenomenon of the cannula, also called Intraestival or summer drought. The peculiar name comes from the Latin cannula that means a small dog, and refers to the Can Mayor Constellation and its Syrian star, whose appearance coincides with the arrival of heat. This phenomenon is always determined by the particular conditions of the area, so it does not always happen in the same form or on the same date. You may have heard from him, but it is interesting to know what causes it. We invite you to read this ecology article to learn more about What is the cannula, how long does it start and when it startsas well as its effects.
What is the cannula and how long it lasts
The cannula is a climatological phenomenon What happens during summerespecially characterized because rains are quite reduced. In addition, the temperature rises to More than 37 ° Cand in certain places he classifies as the hottest season of the year.
If we pay attention during the summer, we will discover that there is a rainy period, followed by a little rainy period. Within the rainy period there are two rains, and among them there is a Dry season. This is precisely what is called a cannula.
The phenomenon occurs by semi -permanent anticyclones in the Atlantic and Pacific Cause of displacement and increase in high pressure, where the winds of the East prevent the clouds from forming on these oceans and, therefore, cannot move the water in the form of rain.
It is not a sporadic phenomenon, but is recurring and presents every year. Usually hard 40 daysalthough this is not fixed and the duration lies in the area. It can last more or less of this time.
You may also be interested in knowing more about the effect of the island of heat: what it is, causes, consequences and solutions.
When the cannula begins
The cannula cannot be forecast because it responds to the Climate variabilitynor can you know the duration and intensity it will. On the other hand, The cannula is not uniformbut in each region it occurs at different times and intensity.
It can become dangerous depending on the annual variability, and also the region. For example, in the Eastern Pacific it is stronger than in the Eastern Caribbean. Force is also determined by external factors, such as cyclones or tropical waves. Climate change can cause the event to anticipate as, for example, it has happened in recent years.
Of course, the cannula always comes with summer. Let’s see how it varies in different parts of the world.
When the cannula begins in Spain
The cannula in Europe is mainly due to the increase in temperature. Start mid -July. It is expected for July 15, although it has been presented in previous years for day 4 or 7. The areas most affected by the cannula are in the Peninsular North Third.
When the cannula begins in Mexico
In Mexico, the cannula happens mainly because of the decrease in rain, and not for temperature as in Europe. This is because in the center and south of Mexico the temperature is warmer in spring, and does not match the summer drought. For this reason, it is not correct to say that in Mexico the cannula is marked for the warmest 40 days.
It happens a few weeks after the summer solstice, normally waiting on July 15, to mid -Julyand ends in the last days of August. The historical records of other years for Mexico have placed it for July 3, 12 or 21, so the date varies a lot. In some states of the Republic it can extend even until September.
It occurs only in the Centro Sur, Centro Oriente and part of northwest Mexico. In the north there is usually no cannula, because of the North American monsoon that increases rain during the summer.
Canicle effects
Together with the cannula there are other consequences from which a waterfall effect follows. Among the main effects we find:
- Clear sky: The winds that blow avoid cloud formation, resulting in very clear days.
- Drought: The rain decreases by 40%, leading to severe droughts. For this reason, the cannula is also known as summer drought. In this other post you can read about what drought, its causes and consequences is.
- Crop decrease: droughts lead to problems with food crops having a direct impact on food security.
- Water reserves exhaustion: Due to lack of rains, water reserves for human consumption begin to run out.
- Air warming: The temperature increase causes the surrounding air to heat up.
- Forest fires: The temperature increase affects sporadic fires, directly affecting the biodiversity that is there. We advise you to read about what forest fires are and how they occur and also how to prevent forest fires.
- Health risks: Strong heat waves are potentially dangerous for people, especially third -age individuals. It is essential to hydrate well, avoid external activity at noon, and avoid unprotected sun exposure. Here you can read more about heat waves: what are, temperatures, causes and consequences.
Now that you know better what the cannula is, we recommend you discover these plants that absorb heat, ideal to have at home at this time.
If you want to read more articles similar to Canicle: What is it, how long and when it startswe recommend that you enter our category of other environment.
- Verbist, K., Maureira, H., & Aroche, R. (2018). Atlas of the Canicle of Central America and the Caribbean. UNESCO Publishing.
- Nevárez, RV (2018) What is the wet period and the agronomic canicle and how are they determined? Apatlaco River Case Study. IV National Irrigation and Drainage Congress, COMEI-18044.
- Mexican Water Commission (2022) Between July and August there could be the cannula in areas of the center, the East and South Mexico. Press statement No. 00480-22.
