‘Global weirding’: climate whiplash hitting world’s biggest cities, study reveals | Climate crisis

A report on the climate crisis revealed a report on the climate crisis in the report.

Dozens of cities, including Leno, Madrid and his country, have suffered from the “heart” of a climate in the past twenty years, by shifting from dehydration to wet extremism, or vice versa. The report analyzed the 100 most populated cities, in addition to 12 selected cities, and found that 95 % of them showed a distinct trend towards wet weather or dehydration.

The changing climate of cities can strike citizens with varying floods and carrots, destroy access to clean water, sanitation and food, supply societies and spread the disease. The cities where the water infrastructure is already poor, such as Karachi and khartoum, suffer more than others.

Cities are affected all over the world, but data shows some regional trends, with the drying of Europe, the already prepared Arabian Peninsula and many of the United States, while cities in southern and southeastern Asia are suffering.

The analysis shows the climatic chaos that is brought to urban areas through the global heating that caused human beings. A little water or a lot of water is the cause of 90 % of climate disasters. More than 4.4 billion people live in cities, and it was already known that the climate crisis is known from individual extremist disasters throughout the planet.

High temperatures, led by fossil fuel pollution, can exacerbate both floods and dehydration because the warmer air can occupy more water vapor. This means that the air can absorb more water from the ground during hot dehydration, but also release more intense rain when the rain comes.

“Our study indicates that climate change is significantly different all over the world,” said Professor Katrina Michaeldes, of the University of Bristol, UK. Its co -author, Professor Michael Singer at Cardiff University, described the style as “”Global String“.

“Most of the places we looked at somehow change, but in an unpredictable way,” said Singer. “Given that we look at the largest cities in the world, there are a large number of people concerned.”

Michaeldes said that dealing with the climate and turning in cities is very difficult. Many cities are already facing problems in water supply, wastewater and flood protection as their population swells quickly. But global heating is highly charging, with the mostly infrastructure of aging in the rich countries designed for a climate that no longer exists, and more climate, which makes the creation of the infrastructure that affects the need more difficult in low -income countries.

The researchers worked in Nairobi, Kenya, one of the climate cities. “People were struggling without any water, failed crops, and dead livestock, with drought really affects their lives and their lives for several years,” said Michaeldes. “Then the next thing that is happening is a lot of rain, and everything is flooded by water, they lose more livestock, overcome the city’s infrastructure, water is contaminated, then people get sick.”

“The threat of” the global zero day “is waving on the horizon – what happens when 4 billion people are already facing water scarcity to that urgent point, food, health, energy, nature, economies, and water -based security?

“It is time for a speedy group work, so that societies can recover from disasters and be ready for anything that the future hides. This will make the world a safer place for everyone.”

the Los Angeles brutal forest fires In January, it was an example of one event of one origin, with a wet period stimulating the growth of the vegetation, which nourishes the fires when following the hot and dry weather. Such events more Because of the global heating of human being.

the New analysis by michaelides and singer It has been much wider and examined changes in wet and dry extremism over the past four decades in 112 main cities.

It found that 17 cities around the world were injured, and suffered from the utmost frequent degrees from both wet and dry conditions. The largest injury was seen in Hangzhou in China, the Indonesian decoration of Jakarta, and Dallas in Texas. Other cities of injury include Baghdad, Bangkok, Melbourne and Nairobi. The rapid shift between wet and dry extremism makes it difficult for cities to prepare and restore life and livelihoods.

The analysis also found that 24 cities witnessed a dramatic climate of this century. The most sharp keys of wet to the dry conditions in Cairo, Madrid and his country were with Hong Kong and San Jose in California in the top ten. The prolonged dehydration can lead to water shortage, cancellation of food supplies and stop electricity in electricity where dependence is dependent.

The most sharp keys of dry conditions to wet in Lanawo and Sourat in India and the second city of Nigeria were. Other cities with wet fluctuations were Bogota, Hong Kong and Taran. Intensive rain can cause flash floods, destruction of homes and roads, and spread fatal diseases carried by water such as cholera and increase when sewage systems are sunken.

The researchers also assessed the level of social weakness and the quality of infrastructure in cities. The cities with the largest climate risk increases with the highest security vulnerability – and therefore places facing the greatest dangers – were Khartoum in Sudan, Faisal Abad in Pakistan, and Oman in Jordan.

Karachi, also in Pakistan, ranked high weakness and witnesses more wet extremism. In 2022 heavy rains destroyed the house of the Fisher Mohamed Eunis family in Ibrahim Haydari, the city facade in the city.

He said: “We spent several days and nights completely mired in the rain because we had no shelter.” “The weather affects everything. When it rains, our children pass. But we don’t have enough [clean] water. Our sites collapse. Homes are near sewage systems collapse due to floods. When the floods come, the walls collapse. If we have enough money, we will not live here. “

Even in the cities where the changes in the climate were less difficult, clear trends were seen in almost each. Places that are increasingly dry over the past forty years included Paris, Los Angeles, Cape Town and Rio de Janeiro. Many who are wet in South Asia, such as Mumbai, Lahore and Kabul.

The researchers have also found 11 cities, as the number of wet or very dry months has decreased in the past twenty years, including Nagiaa in Japan, Lusaka in Zambia, and Guangzhou in China.

The total results of the new study are compatible with the latest report issued by the International Government Committee on Climate Change, which found that there are both regions with an increase in heavy rains and others with an increase in drought, as well as some areas with increases in both cases. Weather events and extremist climate.

She said: “A few tenths of the warmer and life that we know become increasingly at risk due to the utmost atmosphere such as heat waves, dehydration and heavy rains.”

“We hope that our report will swear a global attention to the challenges of climate change in water. This may lead to a more realistic conversation about supporting climate change, with a feeling of sympathy and understanding the challenges that people face, rather than just saying, well, we cannot bear it.”

methodology

The researchers analyzed the changing climate of cities using a standard index (SpeiThis rains combined with evaporation every month from 1983 to 2023. The index values ​​were ranked above the sill of use on a large scale as extremist.

To assess the changes over the four decades, the data has been divided into two periods of 21 years. Cities that have seen at least 12 months of one type of extremist climate (wet or dry) were classified at least 12 months of the other type of extremist climate in the second 21 -year period as a climate. Cities that have at least five The most famous of the extreme wet and dry extreme wet in the second period was ranked as climatic. Moisturizing or drying trends are generally identified from all 42 years of data.

The population data used to determine the 100 most populated cities are based on the population density, not the administrative limits of the city, and therefore it is a real reflection of the size of the city. Social weakness was measured using the Standard Human Development Index, and water and waste infrastructure data were taken from a Global Data Group published in 2022.