Urbanisation's influence on climate change increasing in recent decades, study finds - The Economic Times
climate change: Urbanisation's influence on climate change increasing in recent decades, study finds - The Economic Times
Globally,
In the study, published in the journal One Earth, the authors argued for including urbanisation, in line with land use changes, in making projections for the future in the climate change scenario, be it local or continental scale.
Using satellite observations, the researchers found that globally, close to 4.5 lakh square kilometres of urban land was added between 1992 and 2019.
At the country level, over the same period, the Netherlands in
In countries with populations over 20 crore, the researchers found that China, the US and Brazil witnessed a growth in urban area by more than 400 per cent, 180 per cent and 200 per cent.
The growth in urban areas worldwide -- from 0.26 per cent to 0.6 per cent -- is more than that for the 100 years before that, they said.
For the highly urbanised Shanghai metropolitan region in China, the researchers found that between 2003-2019, the daytime temperatures rose by 0.4 degrees Celsius per decade, while the nighttime temperatures rose by 0.48 degrees Celsius per decade.
Europe was found to show the strongest daytime land surface temperature trends, which the authors said may partly be due to strong solar brightening during this period. Solar brightening refers to an increase in radiation reaching the Earth's surface.
On the contrary, China and India, which have experienced significant urbanisation and, thus, strong trends in urban land surface temperatures, showed little changes in their overall land surface temperatures, which the researchers said could partly be due to greening trends during the period 2003-2019.
(You can now subscribe to our
urbanisation has increasingly contributed to warming on the continental scale in the recent decades, especially in rapidly growing regions and countries in Asia, a new research has found. Analysing land temperatures from around the world, researchers found that urbanisation is, however, still not the main cause of climate change, accounting for only two per cent of land warming during the study period of 1992-2019. Urban areas in India were found to have grown by more than 350 per cent.
The researchers, Tirthankar C Chakraborty and Yun Qian,
Modi 3.0 Live
Pacific Northwest National Laboratory, US, said that because cities historically took up a small portion of the Earth's surface, urbanisation is usually ignored when studying the past and projecting future climate for large regions.
In the study, published in the journal One Earth, the authors argued for including urbanisation, in line with land use changes, in making projections for the future in the climate change scenario, be it local or continental scale.
Using satellite observations, the researchers found that globally, close to 4.5 lakh square kilometres of urban land was added between 1992 and 2019.
Continent-wise, the largest increases came from Asia (312 per cent) and
Africa(251 per cent), while the lowest came from Oceania and other islands (155 per cent), they said.
At the country level, over the same period, the Netherlands in
Europe and Aruba in the Caribbean showed a more than 1,500 per cent increase, while Iceland and Greenland showed virtually no change, the authors said.
In countries with populations over 20 crore, the researchers found that China, the US and Brazil witnessed a growth in urban area by more than 400 per cent, 180 per cent and 200 per cent.
The growth in urban areas worldwide -- from 0.26 per cent to 0.6 per cent -- is more than that for the 100 years before that, they said.
Therefore, as the world urbanises and its influence on climate change is increasing, even as it was negligible in the 2000s, they said.
You Might Also Like:
For the highly urbanised Shanghai metropolitan region in China, the researchers found that between 2003-2019, the daytime temperatures rose by 0.4 degrees Celsius per decade, while the nighttime temperatures rose by 0.48 degrees Celsius per decade.
Europe was found to show the strongest daytime land surface temperature trends, which the authors said may partly be due to strong solar brightening during this period. Solar brightening refers to an increase in radiation reaching the Earth's surface.
On the contrary, China and India, which have experienced significant urbanisation and, thus, strong trends in urban land surface temperatures, showed little changes in their overall land surface temperatures, which the researchers said could partly be due to greening trends during the period 2003-2019.
(You can now subscribe to our
Economic Times WhatsApp channel)
...more
(Catch all the
Subscribe to
(Catch all the Business News, Breaking News, Budget 2024 Events and Latest News Updates on The Economic Times.)
Subscribe to The Economic Times Prime and read the ET ePaper online.
(You can now subscribe to our
Economic Times WhatsApp channel)
Read More News on
...more
(Catch all the
Subscribe to
(Catch all the Business News, Breaking News, Budget 2024 Events and Latest News Updates on The Economic Times.)
Subscribe to The Economic Times Prime and read the ET ePaper online.
Prime Exclusives
Related Knowledge Center: Climate economics
Climate change is now a driver of the world’s economy. The impact is profound:
- Catastrophic weather events — hurricanes, floods, droughts, high temperatures — are more frequent and more extreme. The cost can be measured in both the initial damage caused and the longer-term impact on the economy.
- Vulnerable communities are increasing climate-related investments, hardening infrastructure and taking other protective measures.
- Investment in carbon capture and storage technologies is increasingly rapidly.
- Governments are making investments and crafting regulations to reduce emissions of carbon dioxide and other greenhouse gases.
On top of all of this is the cost of uncertainty. As the Fourth National Climate Assessment, released in 2018 by the U.S. Global Change Research Program, says, “The assumption that current and future climate conditions will resemble the recent past is no longer valid.”