* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Wednesday, September 17, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Gen V Season 2: What is The Odessa Project? – yahoo.com

    Gen V Season 2: Unlocking the Secrets of The Odessa Project

    PENN Entertainment stock rating reiterated at Market Outperform by JMP – Investing.com

    PENN Entertainment Stock Rated a Market Outperformer by Experts

    Here’s how NJ’s once-vibrant nightclub scene was born and why it died – Bergen Record

    The Rise and Fall of New Jersey’s Once-Vibrant Nightclub Scene: What Happened?

    The Emmys are back: Viewership soars to highest numbers in 4 years – yahoo.com

    The Emmys Return with a Bang: Viewership Hits a 4-Year High

    From Spinal Tap II to Ed Sheeran : your complete entertainment guide to the week ahead – The Guardian

    Fall’s Hottest Ski Films Are Going on Tour—Here’s the List – yahoo.com

    Experience the Thrill: Fall’s Hottest Ski Films Hit the Road-Don’t Miss the Tour!

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    City IT presented Best of North Carolina Technology Award – RaleighNC.gov

    City IT Honored with Best of North Carolina Technology Award

    LELO Releases 2025 Futurist Report: Intergenerational Views on Relationships, Sex, and Technology – PR Newswire

    Exploring the Future: How Different Generations View Relationships, Sex, and Technology in 2025

    Will New Big Technology Engagements Reshape Innodata’s Growth Path? – Yahoo Finance

    Could New Major Tech Partnerships Propel Innodata to Unprecedented Growth?

    Unlocking AI Success: How People, Process, and Technology Form the Ultimate Triangle

    Billion-dollar coffins? New technology could make oceans transparent and Aukus submarines vulnerable – The Guardian

    Billion-Dollar Coffins? How New Technology Could Make Oceans Transparent and Expose Submarines

    What if artificial intelligence is just a “normal” technology? – The Economist

    What if artificial intelligence is just a “normal” technology? – The Economist

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Gen V Season 2: What is The Odessa Project? – yahoo.com

    Gen V Season 2: Unlocking the Secrets of The Odessa Project

    PENN Entertainment stock rating reiterated at Market Outperform by JMP – Investing.com

    PENN Entertainment Stock Rated a Market Outperformer by Experts

    Here’s how NJ’s once-vibrant nightclub scene was born and why it died – Bergen Record

    The Rise and Fall of New Jersey’s Once-Vibrant Nightclub Scene: What Happened?

    The Emmys are back: Viewership soars to highest numbers in 4 years – yahoo.com

    The Emmys Return with a Bang: Viewership Hits a 4-Year High

    From Spinal Tap II to Ed Sheeran : your complete entertainment guide to the week ahead – The Guardian

    Fall’s Hottest Ski Films Are Going on Tour—Here’s the List – yahoo.com

    Experience the Thrill: Fall’s Hottest Ski Films Hit the Road-Don’t Miss the Tour!

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    City IT presented Best of North Carolina Technology Award – RaleighNC.gov

    City IT Honored with Best of North Carolina Technology Award

    LELO Releases 2025 Futurist Report: Intergenerational Views on Relationships, Sex, and Technology – PR Newswire

    Exploring the Future: How Different Generations View Relationships, Sex, and Technology in 2025

    Will New Big Technology Engagements Reshape Innodata’s Growth Path? – Yahoo Finance

    Could New Major Tech Partnerships Propel Innodata to Unprecedented Growth?

    Unlocking AI Success: How People, Process, and Technology Form the Ultimate Triangle

    Billion-dollar coffins? New technology could make oceans transparent and Aukus submarines vulnerable – The Guardian

    Billion-Dollar Coffins? How New Technology Could Make Oceans Transparent and Expose Submarines

    What if artificial intelligence is just a “normal” technology? – The Economist

    What if artificial intelligence is just a “normal” technology? – The Economist

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

‘A deeply troubling discovery’: Earth may have already passed the crucial 1.5°C warming limit

February 11, 2024
in Science
‘A deeply troubling discovery’: Earth may have already passed the crucial 1.5°C warming limit
Share on FacebookShare on Twitter

hot temperature

Credit: Pixabay/CC0 Public Domain

Global temperatures have already exceeded 1.5°C warming and may pass 2°C later this decade, according to a world-first study I led. The worrying findings, based on temperature records contained in sea sponge skeletons, suggest global climate change has progressed much further than previously thought.

Human-caused greenhouse gas emissions drive global warming. Obtaining accurate information about the extent of the warming is vital, because it helps us understand if extreme weather events are more likely in the near future, and whether the world is making progress in reducing emissions.

To date, estimates of upper ocean warming have been mainly based on sea-surface temperature records, however these date back only about 180 years. We instead studied 300 years of records preserved in the skeletons of long-lived sea sponges from the Eastern Caribbean. In particular, we examined changes in the amount of a chemical known as “strontium” in their skeletons, which reflects variations in seawater temperatures over the organism’s life.

Keeping the average global temperature rise below 1.5°C since pre-industrial times is a goal of the 2015 Paris climate deal. Our research, published in Nature Climate Change, suggests that opportunity has passed. Earth may in fact have already reached at least 1.7°C warming since pre-industrial times—a deeply troubling discovery.

Getting a gauge on ocean heat

Global warming is causing major changes to the Earth’s climate. This was evident recently during unprecedented heat waves across southern Europe, China and large parts of North America.

Oceans cover more than 70% of Earth’s surface and absorb an enormous amount of heat and carbon dioxide. Global surface temperatures are traditionally calculated by averaging the temperature of water at the sea surface, and the air just above the land surface.

But historical temperature records for oceans are patchy. The earliest recordings of sea temperatures were gathered by inserting a thermometer into water samples collected by ships. Systematic records are available only from the 1850s—and only then with limited coverage. Because of this lack of earlier data, the Intergovernmental Panel on Climate Change has defined the pre-industrial period as from 1850 to 1900.

But humans have been pumping substantial levels of carbon dioxide into the atmosphere since at least the early 1800s. So the baseline period from which warming is measured should ideally be defined from the mid-1700s or earlier.

What’s more, a series of exceptionally large volcanic eruptions occurred in the early 1800s, causing massive global cooling. This makes it more difficult to accurately reconstruct stable baseline ocean temperatures.

But what if there was a way to precisely gauge ocean temperatures over centuries in the past? There is, and it’s called “sclerosponge thermometry”.

Studying a special sponge

Sclerosponges are a group of sea sponges that resemble hard corals, in that they produce a carbonate skeleton. But they grow at a much slower rate and can live for many hundreds of years.

The skeletons incorporate a number of chemical elements including strontium and calcium. The ratio of these two elements varies during warmer and cooler periods. This means sclerosponges can provide a detailed diary of sea temperatures, down to a resolution of just 0.1°C.

We studied the sponge species Ceratoporella nicholsoni. They occur in the Eastern Caribbean, where the natural variability of upper ocean temperatures is low which makes it easier to tease out the effects of climate change. We wanted to investigate temperatures in a part of the ocean known as the “ocean mixed layer”. This is the upper part of the ocean, where heat is exchanged between the atmosphere and the ocean interior.

We looked at temperatures going back 300 years, to see whether the current time period which defines pre-industrial temperatures was accurate. So what did we find?

The sponge records showed nearly constant temperatures from 1700 to 1790 and from 1840 to 1860 (with a gap in the middle due to volcanic cooling). We found a rise in ocean temperatures began from the mid-1860s, and was unambiguously evident by the mid-1870s. This suggests the pre-industrial period should be defined as the years 1700 to 1860.

The implications of these findings are profound.

What does this mean for global warming?

Using this new baseline, a very different picture of global warming emerges. It shows human-caused ocean warming began at least several decades earlier than previously assumed by the IPCC.

Long-term climate change is commonly measured against the average warming over the 30 years from 1961 to 1990, as well as warming in more recent decades.

Our findings suggest that in the interval between the end of our newly defined pre-industrial period and the 30-year average mentioned above, the temperatures of the ocean and land surface increased by 0.9°C. This is far more than the 0.4°C warming the IPCC has estimated, using the conventional timeframe for the pre-industrial period.

Add to that the average 0.8°C global warming from 1990 to recent years, and the Earth may have warmed on average by at least 1.7°C since pre-industrial times. This suggests we have passed the 1.5°C goal of the Paris Agreement.

It also suggests the overriding goal of the agreement, to keep average global warming below 2°C, is now very likely to be exceeded by the end of the 2020s—nearly two decades sooner than expected.

Our study has also produced another alarming finding. Since the late 20th century, land-air temperatures have been increasing at almost twice the rate of surface oceans and are now more than 2°C above pre-industrial levels. This is consistent with well-documented decline in Arctic permafrost and the increased frequency around the world of heat waves, bushfires and drought.

We must act now

Our revised estimates suggest climate change is at a more advanced stage than we thought. This is cause for great concern.

It appears that humanity has missed its chance to limit global warming to 1.5°C and has a very challenging task ahead to keep warming below 2°C. This underscores the urgent need to halve global emissions by 2030.

More information:
Malcolm T. McCulloch et al, 300 years of sclerosponge thermometry shows global warming has exceeded 1.5 °C, Nature Climate Change (2024). DOI: 10.1038/s41558-023-01919-7

This article is republished from The Conversation under a Creative Commons license. Read the original article.The Conversation

Citation:
‘A deeply troubling discovery’: Earth may have already passed the crucial 1.5°C warming limit (2024, February 10)
retrieved 10 February 2024
from https://phys.org/news/2024-02-deeply-discovery-earth-crucial-15c.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.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Phys.org – https://phys.org/news/2024-02-deeply-discovery-earth-crucial-15c.html

Tags: 'Deeplysciencetroubling
Previous Post

Which came first: Black holes or galaxies?

Next Post

Why you might start to hate the influencers you once loved

Indonesia ponders pro-growth mandate for central bank as economy flags – Financial Times

Indonesia ponders pro-growth mandate for central bank as economy flags – Financial Times

September 17, 2025
Gen V Season 2: What is The Odessa Project? – yahoo.com

Gen V Season 2: Unlocking the Secrets of The Odessa Project

September 17, 2025
Is the Economy as Healthy as Trump Claims? – The New York Times

Is the Economy as Healthy as Trump Claims? – The New York Times

September 17, 2025
Inside Stephen A. Smith’s near-$40M-a-year bonanza as he launches into political prime time – The New York Times

Inside Stephen A. Smith’s near-$40M-a-year bonanza as he launches into political prime time – The New York Times

September 17, 2025
Torch Lake faces ecological challenges from invasive Quagga Mussels – WPBN

Torch Lake Fights Back Against the Growing Threat of Invasive Quagga Mussels

September 17, 2025
New Data Science Minor Prepares Students for Data-Driven World – CSUF News

Unlock Your Potential with the Exciting New Data Science Minor Designed for a Data-Driven Future

September 17, 2025
Miami University’s Cleveland Clinic Health Sciences and Wellness facility. – Cleveland Clinic Newsroom

Explore Miami University’s Exciting New Cleveland Clinic Health Sciences and Wellness Center

September 17, 2025
This Is The Most Popular Soup In The U.S. Right Now—And It’s A Fall Classic – yahoo.com

This Fall’s Most Beloved Soup Is Taking the U.S. by Storm

September 17, 2025
City IT presented Best of North Carolina Technology Award – RaleighNC.gov

City IT Honored with Best of North Carolina Technology Award

September 17, 2025

Lillie C. Ainscough – altoonamirror.com

September 17, 2025

Categories

Archives

September 2025
MTWTFSS
1234567
891011121314
15161718192021
22232425262728
2930 
« Aug    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (823)
  • Economy (843)
  • Entertainment (21,722)
  • General (17,085)
  • Health (9,888)
  • Lifestyle (857)
  • News (22,149)
  • People (847)
  • Politics (853)
  • Science (16,054)
  • Sports (21,343)
  • Technology (15,825)
  • World (826)

Recent News

Indonesia ponders pro-growth mandate for central bank as economy flags – Financial Times

Indonesia ponders pro-growth mandate for central bank as economy flags – Financial Times

September 17, 2025
Gen V Season 2: What is The Odessa Project? – yahoo.com

Gen V Season 2: Unlocking the Secrets of The Odessa Project

September 17, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version