The latest research on glacial-to-interglacial global temperature change suggests that the fast-feedback equilibrium climate sensitivity for doubled CO2 (2xCO2) is at least ~4{\deg}C, with a likely range of 3.5-5.5{\deg}C. Greenhouse gas (GHG) climate forcing has increased by 4.1 W/m2 since 1750, equivalent to 2xCO2 forcing in 2021. However, global warming in the pipeline is greater than previously estimated and eventual global warming due to today's GHG forcing alone -- after slow feedbacks operate -- is about 10{\deg}C. Human-made aerosols are a major climate forcing, primarily through their impact on clouds. Paleoclimate data indicates that aerosol cooling offset GHG warming for several millennia as civilization developed. However, a hinge-point in global warming occurred in 1970 when increased GHG warming outpaced aerosol cooling, leading to global warming of 0.18{\deg}C per decade. Aerosol cooling is larger than estimated in the current IPCC report but has declined since 2010 due to aerosol reductions in China and shipping. Without unprecedented global actions to reduce GHG growth, we could reach another hinge point around 2010 with global warming in following decades projected to be between 50-100% greater than in the prior forty years. The enormity of consequences of this level of warming demands a new approach addressing both legacy and future emissions if we are to "save" young people and future generations from catastrophic impacts and return to Holocene-level global temperatures urgently. Three critical actions are required: firstly implementing a globally increasing price on GHG emissions; secondly purposeful intervention to rapidly phase down present massive geoengineering of Earth's climate; and thirdly renewed East-West cooperation that accommodates developing world needs. This research highlights the urgent need for immediate and coordinated global action to address climate change; failure to act now will result in catastrophic consequences for future generations.
SummaryThe Earth is getting hotter because of things people are doing. The air has more bad stuff in it that makes it hotter. This will make the Earth much hotter than before and cause big problems for everyone. We need to do things differently to stop this from happening, like making less bad stuff and working together.
Definitions
- Equilibrium climate sensitivity: how much the Earth's temperature will increase if there is double the amount of CO2 in the air
- GHG climate forcing: greenhouse gas emissions that cause global warming
- Aerosols: tiny particles in the air that can cool or warm the Earth's surface depending on their properties
- Hinge-point: a turning point where one thing starts to have a bigger effect than another thing
- Legacy emissions: greenhouse gas emissions from past actions that still affect the Earth's temperature today
- Geoengineering: large-scale interventions to manipulate the Earth's climate system
- Holocene-level global temperatures: temperatures similar to what they were during a period called the Holocene, which lasted from about 11,700 years ago until now
Global Warming: The Urgent Need for Immediate and Coordinated Global Action
Climate change is one of the most pressing issues facing humanity today. Recent research has revealed that global temperatures have been increasing rapidly since the industrial revolution, due to increased greenhouse gas (GHG) emissions and human-made aerosols. This article will discuss the latest research on glacial-to-interglacial global temperature change, its implications, and what actions need to be taken in order to address climate change.
Glacial-To-Interglacial Global Temperature Change
The latest research on glacial-to-interglacial global temperature change suggests that the fast-feedback equilibrium climate sensitivity for doubled CO2 (2xCO2) is at least ~4{\deg}C, with a likely range of 3.5–5.5{\deg}C. Greenhouse gas (GHG) climate forcing has increased by 4.1 W/m2 since 1750, equivalent to 2xCO2 forcing in 2021. However, global warming in the pipeline is greater than previously estimated and eventual global warming due to today's GHG forcing alone -- after slow feedbacks operate -- is about 10{\deg}C.
Human-made aerosols are a major climate forcing, primarily through their impact on clouds. Paleoclimate data indicates that aerosol cooling offset GHG warming for several millennia as civilization developed; however, a hinge point in global warming occurred in 1970 when increased GHG warming outpaced aerosol cooling leading to global warming of 0.18{\deg}C per decade . Aerosol cooling is larger than estimated in the current IPCC report but has declined since 2010 due to aerosol reductions in China and shipping . Without unprecedented global actions to reduce GHG growth , we could reach another hinge point around 2010 with global warming in following decades projected to be between 50–100% greater than prior forty years .
Implications Of Glacial To Interglacal Global Temperature Change
The enormity of consequences of this level of warming demands a new approach addressing both legacy and future emissions if we are to "save" young people and future generations from catastrophic impacts and return us back towards Holocene level temperatures urgently . Three critical actions are required: firstly implementing a globally increasing price on GHG emissions; secondly purposeful intervention to rapidly phase down present massive geoengineering of Earth's climate ;and thirdly renewed East - West cooperation that accommodates developing world needs .
Conclusion
This research highlights the urgent need for immediate and coordinated global action if we are going save ourselves from catastrophic impacts caused by rising temperatures levels due rapid increase in greenhouse gases over past few centuries . We must take three critical steps : implement globally increasing price on greenhouse gas emission , intervene massively geoengineering activities ,and promote east - west cooperation which takes into account needs of developing countries . If these steps aren't taken soon then it will lead us towards an uncertain future where our planet may become inhabitable within next few decades or centuries
Improved knowledge of glacial-to-interglacial global temperature change implies that fast-feedback equilibrium climate sensitivity is at least ~4{\deg}C for doubled CO2 (2xCO2), with likely range 3.5-5.5{\deg}C. Greenhouse gas (GHG) climate forcing is 4.1 W/m2 larger in 2021 than in 1750, equivalent to 2xCO2 forcing. Global warming in the pipeline is greater than prior estimates. Eventual global warming due to today's GHG forcing alone -- after slow feedbacks operate -- is about 10{\deg}C. Human-made aerosols are a major climate forcing, mainly via their effect on clouds. We infer from paleoclimate data that aerosol cooling offset GHG warming for several millennia as civilization developed. A hinge-point in global warming occurred in 1970 as increased GHG warming outpaced aerosol cooling, leading to global warming of 0.18{\deg}C per decade. Aerosol cooling is larger than estimated in the current IPCC report, but it has declined since 2010 because of aerosol reductions in China and shipping. Without unprecedented global actions to reduce GHG growth, 2010 could be another hinge point, with global warming in following decades 50-100% greater than in the prior 40 years. The enormity of consequences of warming in the pipeline demands a new approach addressing legacy and future emissions. The essential requirement to "save" young people and future generations is return to Holocene-level global temperature. Three urgently required actions are: 1) a global increasing price on GHG emissions, 2) purposeful intervention to rapidly phase down present massive geoengineering of Earth's climate, and 3) renewed East-West cooperation in a way that accommodates developing world needs.
