• About us
  • Contact
Sunday, June 4, 2023
No Result
View All Result
NEWSLETTER
Times Of Nation
-18 °c
  • Top Stories
  • Genetics
  • Environment
  • Wildlife
  • Outer space
    China’s Shenzhou 15 capsule lands safely with 3 Tiangong space station astronauts (video)

    China’s Shenzhou 15 capsule lands safely with 3 Tiangong space station astronauts (video)

    Falcon 9 rocket ready to launch space station resupply mission – Spaceflight Now

    Falcon 9 rocket ready to launch space station resupply mission – Spaceflight Now

    Second-generation Starlink satellites set for launch on Falcon 9 rocket – Spaceflight Now

    Second-generation Starlink satellites set for launch on Falcon 9 rocket – Spaceflight Now

    Jupiter’s “Stripes” Change Color. Now We Might Know Why

    Jupiter’s “Stripes” Change Color. Now We Might Know Why

    Watch SpaceX launch 22 Starlink ‘V2 mini’ satellites early Sunday

    Watch SpaceX launch 22 Starlink ‘V2 mini’ satellites early Sunday

    See the Full Strawberry Moon of June share the sky with Mars and a half Venus tonight

    See the Full Strawberry Moon of June share the sky with Mars and a half Venus tonight

    Watch SpaceX launch Dragon cargo mission to space station today

    Watch SpaceX launch Dragon cargo mission to space station today

    China’s Shenzhou 15 astronauts set to return to Earth tonight

    China’s Shenzhou 15 astronauts set to return to Earth tonight

    Astronomers are Searching for a Galaxy-Wide Transmitter Beacon at the Center of the Milky Way

    Astronomers are Searching for a Galaxy-Wide Transmitter Beacon at the Center of the Milky Way

  • Physics
    Improving fluid simulations with embedded neural networks

    Improving fluid simulations with embedded neural networks

    Predicting the composition of a steel alloy

    Predicting the composition of a steel alloy

    Examining the propagation of ultrasonic waves through liquids containing encapsulated bubbles

    Examining the propagation of ultrasonic waves through liquids containing encapsulated bubbles

    Trending Tags

    • geophysics
    • quantum
    • physicists
    • physiology
    • physical
    • holography
  • Top Stories
  • Genetics
  • Environment
  • Wildlife
  • Outer space
    China’s Shenzhou 15 capsule lands safely with 3 Tiangong space station astronauts (video)

    China’s Shenzhou 15 capsule lands safely with 3 Tiangong space station astronauts (video)

    Falcon 9 rocket ready to launch space station resupply mission – Spaceflight Now

    Falcon 9 rocket ready to launch space station resupply mission – Spaceflight Now

    Second-generation Starlink satellites set for launch on Falcon 9 rocket – Spaceflight Now

    Second-generation Starlink satellites set for launch on Falcon 9 rocket – Spaceflight Now

    Jupiter’s “Stripes” Change Color. Now We Might Know Why

    Jupiter’s “Stripes” Change Color. Now We Might Know Why

    Watch SpaceX launch 22 Starlink ‘V2 mini’ satellites early Sunday

    Watch SpaceX launch 22 Starlink ‘V2 mini’ satellites early Sunday

    See the Full Strawberry Moon of June share the sky with Mars and a half Venus tonight

    See the Full Strawberry Moon of June share the sky with Mars and a half Venus tonight

    Watch SpaceX launch Dragon cargo mission to space station today

    Watch SpaceX launch Dragon cargo mission to space station today

    China’s Shenzhou 15 astronauts set to return to Earth tonight

    China’s Shenzhou 15 astronauts set to return to Earth tonight

    Astronomers are Searching for a Galaxy-Wide Transmitter Beacon at the Center of the Milky Way

    Astronomers are Searching for a Galaxy-Wide Transmitter Beacon at the Center of the Milky Way

  • Physics
    Improving fluid simulations with embedded neural networks

    Improving fluid simulations with embedded neural networks

    Predicting the composition of a steel alloy

    Predicting the composition of a steel alloy

    Examining the propagation of ultrasonic waves through liquids containing encapsulated bubbles

    Examining the propagation of ultrasonic waves through liquids containing encapsulated bubbles

    Trending Tags

    • geophysics
    • quantum
    • physicists
    • physiology
    • physical
    • holography
No Result
View All Result
Times Of Nation
No Result
View All Result
bayan çanta
Home Environment

Exposure to deadly urban heat worldwide has tripled in recent decades, says study

by TimesOfNation
October 5, 2021
in Environment
Exposure to deadly urban heat worldwide has tripled in recent decades, says study
0
SHARES
3
VIEWS
Share on FacebookShare on Twitter

Exposure to deadly urban heat worldwide has tripled in recent decades, says study – Times of Nation

Annual municipality-level increases in the rate of urban population exposure to extreme heat, 1983-2016. Credit- Adapted from Tuholske et al., PNAS, 2021

A new study of more than 13,000 cities worldwide has found that the number of person-days in which inhabitants are exposed to extreme combinations of heat and humidity has tripled since the 1980s. The authors say the trend, which now affects nearly a quarter of the world’s population, is the combined result of both rising temperatures and booming urban population growth. The study was published today in the Proceedings of the National Academy of Sciences.

RelatedArticles

Thousands ordered to flee advancing wildfires in Quebec

Ozone layer recovery delayed, surface UV radiation continues to rise, finds study

Study finds forest protection successfully leads to reduced emissions at global scale

Over recent decades, hundreds of millions have moved from rural areas to cities, which now hold more than half the world’s population. There, temperatures are generally higher than in the countryside, because of sparse vegetation and abundant concrete, asphalt and other impermeable surfaces that tend to trap and concentrate heat—the so-called urban heat island effect.

“This has broad effects,” said the study’s lead author, Cascade Tuholske, a postdoctoral researcher at Columbia University’s Earth Institute. “It increases morbidity and mortality. It impacts people’s ability to work, and results in lower economic output. It exacerbates pre-existing health conditions.”

The researchers combined infrared satellite imagery and readings from thousands of ground instruments to determine maximum daily heat and humidity readings in 13,115 cities, from 1983 to 2016. They defined extreme heat as 30 degrees Centigrade on the so-called “wet-bulb globe temperature” scale, a measurement that takes into account the multiplier effect of high humidity on human physiology. A wet-bulb reading of 30 is the rough equivalent of 106 degrees Fahrenheit on the so-called “real feel” heat index—the point at which even most healthy people find it hard to function outside for long, and the unhealthy might become very ill or even die.

To come up with a measure of person-days spent in such conditions, the researchers matched up the weather data with statistics on the cities’ populations over the same time period. The population data was provided in part by Columbia’s Center for International Earth Science Information Network, where Tuholske is based.

The analysis revealed that the number of person-days in which city dwellers were exposed went from 40 billion per year in 1983 to 119 billion in 2016—a threefold increase. By 2016, 1.7 billion people were being subjected to such conditions on multiple days.

Sheer urban population growth accounted for two-thirds of the exposure spike, while actual warming contributed a third. That said, the proportions varied from region to region and city to city.

The most-affected cities tend to cluster in the low latitudes, but other areas are being affected, too. The worst-hit city in terms of person-days was Dhaka, the fast-growing capital of Bangladesh; it saw an increase of 575 million person-days of extreme heat over the study period. Its ballooning population alone—4 million in 1983, to 22 million today—caused 80 percent of the increased exposure. This does not mean that Dhaka did not see substantial warming—only that population growth was even more rapid. Other big cities showing similar population-heavy trends include Shanghai and Guangzhou, China; Yangon, Myanmar; Bangkok; Dubai; Hanoi; Khartoum; and various cities in Pakistan, India and the Arabian Peninsula.

On the other hand, some other major cities saw close to half or more of their exposure caused by warming climate alone versus population growth. These included Baghdad, Cairo, Kuwait City, Lagos, Kolkata, Mumbai, and other big cities in India and Bangladesh. The populations of European cities have been relatively static, so increases in exposure there were driven almost exclusively by increased warmth. The researchers found that 17 percent of the cities studied added an entire month of extreme-heat days over the 34-year study period.

“A lot of these cities show the pattern of how human civilization has evolved over the past 15,000 years,” said Tuholske, pointing out that many are located in warm climates where humidity is delivered by big river systems. This made them attractive for farming and eventually urbanization. “The Nile, the Tigris-Euphrates, the Ganges. There is a pattern to the places where we wanted to be,” he said. “Now, those areas may become uninhabitable. Are people really going to want to live there?”

Exposure to deadly urban heat worldwide has tripled in recent decades, says study
This interactive map allows users to zoom in on more than 13,000 individual cities for data on increases in person-day exposure to extreme heat and humidity, and the factors involved. For the live version, go to- https-//bit.ly/3uj23Ty. Credit- Adapted from Tuholske et al., PNAS, 2021. Interactive graphics by Jeremy Hinsdale/Earth Institute

In the United States, about 40 sizable cities have seen rapidly growing exposure, mainly clustered in Texas and the Gulf Coast. In many, the causes of the rises have been varying combinations of both increasing population and increasing heat. These include Houston, Dallas-Fort Worth, San Antonio and Austin, Tex., along with Pensacola and other cities in Florida. In some, population growth is the main driver. These include Las Vegas; Savannah, Ga.; and Charleston, S.C. In others, it is almost exclusively fast-rising heat- Baton Rouge, La.; Gulfport, Miss.; and Lake Charles and Houma, La. One major outlier- the bayside city of Providence, R.I., where rising exposure was 93 percent due to warmer, more humid weather.

Because the period covered by the study ran only through 2016, the data did not include the series of record heat waves that raked the U.S. Northwest and southern Canada this summer, killing hundreds of people.

The study is not the first to document the dangers of excessive urban heat; among others, last year a separate Earth Institute team showed that combinations of heat and humidity literally beyond the limits of outdoor human survival have been briefly popping up around the world. The newer study led by Tuholske adds to the picture by quantifying on a granular level how many people are being affected in each location, and the degree to which exposure is being driven by population versus climate. The authors say this information should help urban planners come up with better-targeted strategies to help citizens adapt.

Kristina Dahl, a climate researcher at the Union of Concerned Scientists, said the study “could serve as a starting point for identifying ways to to address local heat issues,” such as planting trees and modifying rooftops with lighter colors or vegetation so they don’t trap so much heat. “This study shows that it will take considerable, conscientious investments to ensure that cities remain livable in the face of a warming climate,” she added.

The other authors of the study are Kelly Caylor, Chris Funk, Stuart Sweeney and Pete Peterson of the University of California, Santa Barbara; Andrew Verdin and Kathryn Grace of the University of Minnesota Twin Cities; and Tom Evans of the University of Arizona.


New heat exposure model can protect citizens


More information-
Global urban population exposure to extreme heat, Proceedings of the National Academy of Sciences (2021). doi.org/10.1073/pnas.2024792118

Provided by
Earth Institute at Columbia University

Citation–
Exposure to deadly urban heat worldwide has tripled in recent decades, says study (2021, October 4)
retrieved 4 October 2021
from https-//phys.org/news/2021-10-exposure-deadly-urban-worldwide-tripled.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

(News Source -Except for the headline, this story has not been edited by Times Of Nation staff and is published from a phys.org feed.)

Read Also- Latest News | Current Affairs News | Today News | English News | World News Today

TimesofNation.com offer news and information like- English newspaper today | today English news | English news live | times of news| today news in English in India | breaking news in India today | India TV news today & Hindustan news.

You can Read on TimesofNation.com latest news today, breaking news headlines, Top news. Discover national and international news on economy, politics, defence, sports, world news & other relatively current affair’s news.

Here are More Section of Environment News- global warming acid rain air pollution urban sprawlwaste disposal ozone layer depletion water pollution climate change

Plugin Install : Subscribe Push Notification need OneSignal plugin to be installed.
TimesOfNation

TimesOfNation

Related Posts

Andhra Pradesh Health Dept. sets up medical camp as viral fevers break out in Chittoor village

Andhra Pradesh Health Dept. sets up medical camp as viral fevers break out in Chittoor village

by TimesOfNation
June 4, 2023
1

Andhra Pradesh Health Dept. sets up medical camp as viral fevers break out in Chittoor village Additional DMHO P. Ravi...

China’s Shenzhou 15 capsule lands safely with 3 Tiangong space station astronauts (video)

China’s Shenzhou 15 capsule lands safely with 3 Tiangong space station astronauts (video)

by TimesOfNation
June 4, 2023
3

China's Shenzhou 15 capsule lands safely with 3 Tiangong space station astronauts (video): Times Of Nation China's Shenzhou 15 astronauts...

‘Tiffin Pe Charcha’ Campaign: UP CM Interacts with Party Workers in Gorakhpur

‘Tiffin Pe Charcha’ Campaign: UP CM Interacts with Party Workers in Gorakhpur

by TimesOfNation
June 4, 2023
3

'Tiffin Pe Charcha' Campaign- UP CM Interacts with Party Workers in Gorakhpur Published By- Pragati PalLast Updated- June 04, 2023,...

Jaipur: Mother commits suicide after killing her four children; father kills his only son

Jaipur: Mother commits suicide after killing her four children; father kills his only son

by TimesOfNation
June 4, 2023
3

Jaipur- Mother commits suicide after killing her four children; father kills his only son In Barmer, Rajasthan a mother committed suicide after killing her four children by drowning them...

The forest knows: the Amazon village with a message for the world – a photo essay

The forest knows: the Amazon village with a message for the world – a photo essay

by TimesOfNation
June 4, 2023
4

The forest knows- the Amazon village with a message for the world – a photo essay I met Dom through...

Baristas behind bars: From serving time to serving lattes

Baristas behind bars: From serving time to serving lattes

by TimesOfNation
June 4, 2023
4

Baristas behind bars- From serving time to serving lattes 'I want to make the most of my time, even in...

Next Post
In photos: Russian film crew launching to the International Space Station

In photos: Russian film crew launching to the International Space Station

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

I agree to the Terms & Conditions and Privacy Policy.

Recommended

Astronomers Detect Clouds on an Exoplanet, and Even Measure Their Altitude – Universe Today

Astronomers Detect Clouds on an Exoplanet, and Even Measure Their Altitude – Universe Today

2 years ago
14
Hybrid exciton–polariton particles surprise with negative mass

Hybrid exciton–polariton particles surprise with negative mass

4 weeks ago
3

Popular News

  • Twitter’s second safety leader to quit: Report – Times of India

    Twitter’s second safety leader to quit: Report – Times of India

    2 shares
    Share 1 Tweet 1
  • India proposes global platform for technology, product transfer during health emergencies

    1 shares
    Share 0 Tweet 0
  • Falcon 9 rocket ready to launch space station resupply mission – Spaceflight Now

    1 shares
    Share 0 Tweet 0
  • CSIR UGC NET admit card 2023 released; check download steps

    1 shares
    Share 0 Tweet 0
  • Watch SpaceX launch 22 Starlink ‘V2 mini’ satellites early Sunday

    1 shares
    Share 0 Tweet 0

About

Times Of Nation

timesofnation.com is a dedicated news website for core sciences, technology, medical research and health news along with current affairs coverage from India. the timesofnation.com website is one of the fast growing online communities for science-minded people....Read more

Category

  • Business News
  • Environment
  • Genetics
  • India
  • Outer space
  • Physics
  • Wildlife

Site Links

  • Corrections Policy
  • Fact Checking Policy
  • Terms of Service
  • Privacy Policy

Contact Us

Email us to send your suggestions
editor[@]timesofnation.com
Send articles and news to editor[@]timesofnation.com
For other enquiries: admin[@]timesofnation.com
If you find any content violating the editorial code of conduct mail to editor[@]timesofnation.com.

  • Corrections Policy
  • Fact Checking Policy
  • Terms of Service
  • Privacy Policy

© 2021 Times of Nation. All rights reserved.

ankara escort çankaya escort çankaya escort escort bayan çankaya istanbul rus escort eryaman escort ankara escort kızılay escort istanbul escort ankara escort ankara escort escort ankara istanbul rus Escort atasehir Escort beylikduzu Escort Ankara Escort malatya Escort kuşadası Escort gaziantep Escort izmir Escort
No Result
View All Result
  • Home
  • Genetics
  • Environment
  • Wildlife
  • Outer space
  • Physics

© 2021 Times of Nation. All rights reserved.

Login to your account below

Forgotten Password? Sign Up

Fill the forms bellow to register

All fields are required. Log In

Retrieve your password

Please enter your username or email address to reset your password.

Log In
This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.