Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.
26 November 424.19 ppm
Safe concentration: 350 ppm
ppm – the number of particles of carbon dioxide per million particles of air.
More on gml.noaa.gov
Several components of the Earth's system are at high risk of undergoing rapid, irreversible qualitative changes or "overturning" with increasing climate warming. Therefore, it is necessary to investigate the feasibility of stopping or even reversing the exceeding of tipping thresholds. Here, we study the feedback control of an idealized energy balance model (EBM) for Earth's climate that exhibits a “small ice sheet” instability responsible for the rapid transition to an ice-free climate under increasing greenhouse gas pressure. We develop an optimal control strategy for EBM under different forcing scenarios to reverse sea ice loss while minimizing costs. Control is achievable for this system, but the cost almost quadruples when the system flips. While thermal inertia can delay a rollover, leading to a critical force threshold being exceeded, this freedom comes with a steep increase in the control required when a rollover occurs. Furthermore, we found that the optimal control is localized in the polar region. (Parvathi Kooloth, Jian Lu, Adam Rupe, more at nature.com)
Global climate changes represent the most significant threat to the environment and socio-economic development, endangering lives and livelihoods. Within the UN's current 17 Sustainable Development Goals (SDGs), climate action is explicitly included in Goal 13, "take urgent action to combat climate change and its impacts." This perspective considers how to reformulate the Sustainable Development Goals and their successors towards incorporating climate action into the goals and indicators of all development goals.Ajit Singh, František D., Ian Thomson, more at nature.com)
Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.
24 November 424.16 ppm
Safe concentration: 350 ppm
ppm – the number of particles of carbon dioxide per million particles of air.
More on gml.noaa.gov
Today, the Atlantic meridional overturning circulation is the main driver of northward heat transport in the Atlantic Ocean and creates global climate patterns. Whether global warming has affected the strength of this overturning circulation over the past century is still debated: observational studies suggest a persistent weakening since the mid-twentieth century, while climate models systematically simulate a stable circulation. Here, using Earth system and eddy-allowing ocean–sea ice models, we show that freshening of the subarctic Atlantic Ocean and weakening of the overturning circulation increase the temperature and salinity of the South Atlantic on a decadal timescale through Kelvin and Rossby wave propagation. We also show that accounting for the upper meltwater input in the historical simulations significantly improves the model fit to data on past changes in the Atlantic meridional overturning circulation, yielding a slowdown of 0.46 sverdrups per decade since 1950. Including estimates of subarctic meltwater inputs for the coming century suggests that this circulation could be 33 % weaker than its anthropogenically undisturbed state below the 2°C of global warming that can be achieved within the next decade. Such a weakening of the overturning circulation would significantly affect the climate and ecosystems. (Gabriel M. Pontes & Laurie Menviel , more at earth.com)
Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.
23 November 424.15 ppm
Safe concentration: 350 ppm
ppm – the number of particles of carbon dioxide per million particles of air.
More on gml.noaa.gov
The key freshwater inputs that drive the Atlantic meridional circulation (AMOC) slowdown and their climate responses remain inconclusive. Using a state-of-the-art global climate model, we conduct freshwater experiments to re-examine the sensitivity of the AMOC and its climate impacts. The Irminger Basin appears to be the most effective area for additional freshwater inflows, causing the greatest weakening of the AMOC. While global temperature and precipitation responses are relatively homogeneous, subcontinental responses—especially in the northern midlatitudes—are heterogeneous. At high latitudes, temperature changes determine the response of sea ice to freshwater fluxes and associated ice-albedo feedbacks. In tropical and extratropical regions, temperature dynamics are shaped by atmospheric circulation and oceanic heat transfer. Precipitation shows seasonal and regional variability due to altered surface turbulent heat flux and the southward movement of the Intertropical Convergence Zone (ITCZ). The extensive heterogeneity in climate extremes underscores the need to monitor areas of freshwater release associated with AMOC deceleration. These findings have major implications for understanding paleoclimate and the future impacts of the AMOC. (Qiyun Ma, Xiaoxu Shi, Monica Ionita, more at science.org)
Mining activities significantly contribute to the loss of forest cover (FCL), consequently to changing global carbon dynamics and worsening climate change. This study aims to estimate the contribution of mining-induced FCL to carbon sequestration loss (CSL) and carbon dioxide (CO₂) emissions from 2000 to 2019 using proxy datasets. For the FCL analysis, global FCL data with a spatial resolution of 30 m were developed by Hansen et al. (2013), was employed in the Google Earth Engine (GEE) cloud platform. In addition, Moderate Resolution Imaging Spectroradiometer (MODIS)-based Net Primary Productivity (NPP) data and biomass datasets developed by Zhang and Liang (2020) were used to assess CSL and CO₂ emissions. The results of the study showed approximately 16,785.90 km worldwide 2 FCL due to mining activities, resulting in an estimated CSL of ∼36,363.17 Gg CO₂/yr and CO₂ emissions of ∼490,525.30 Gg CO₂. Indonesia emerged as the largest contributor to mining-induced FCL, accounting for 3,622.78 km 2 of deforestation or 21.58 % of the global total. Brazil and Canada followed with significant deforestation and CO₂ emissions. The findings revealed that mining activities are a major driver of deforestation, especially in resource-rich regions, leading to substantial environmental degradation. (Avinash Kumar Ranjan, Amit Kumar Gorai, more at sciencedirect.com)
Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.
20 November 424.12 ppm
Safe concentration: 350 ppm
ppm – the number of particles of carbon dioxide per million particles of air.
More on gml.noaa.gov
Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.
November 19 424.11 ppm
Safe concentration: 350 ppm
ppm – the number of particles of carbon dioxide per million particles of air.
More on gml.noaa.gov
Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.
November 18 424.09 ppm
Safe concentration: 350 ppm
ppm – the number of particles of carbon dioxide per million particles of air.
More on gml.noaa.gov
CO2news.sk is a leading portal dedicated to raising awareness of climate change and sustainability. With its database of more than 4000 posts has become an indispensable source of information for experts, activists and interested parties from all over the world. The platform attracted more than 40,000 users , who use its content to support the climate debate and solutions to global environmental challenges.
Modern technologies in the services of information
CO2news.sk differs in that makes full use of artificial intelligence technologies (CO2AI) . Thanks to AI, it can automatically process huge amounts of data, analyze climate trends and generate reports that make it easier to navigate complex topics. Intelligent algorithms help categorize content, recommend relevant posts and improve user experience.
This innovative approach allows not only to provide up-to-date information, but also to predict environmental trends and propose data-based solutions.
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This study examines the role of country- and individual-level factors on climate change risk perceptions in 28 European countries. Based on the nature of the data and the research question, a multilevel ordered logit model is used. As individual observations are nested between countries, the data are hierarchical, which justifies the use of a multilevel model. The analysis focuses on the dependent variable with ordered categories. Because of their inherent ordinal structure, the response levels provide a meaningful ranking. The ordered logit model explicitly takes this ordinal nature into account when modeling the dependent variable. At the country level, this study found that climate change risk perceptions increase with higher levels of per capita income and lower levels of regulatory quality. The positive effect of the level of national income persists even after controlling for whether the country had a communist regime in the past or not. At the individual level, this study found that higher levels of climate change risk perception are shown by more educated individuals, people with egalitarian and post-materialist values, people with a higher interest in politics and lower levels of personal economic worries. Overall, women express higher levels of climate change risk perception than men, but having younger children at home reduces women's risk perception. Similarly, the level of climate change risk perception decreases with age only among women. A series of robustness checks confirm the main findings. The research suggests that EU policymakers can improve climate policies and public engagement by considering differences in income, regulatory quality, historical context and gender-specific aspects. Insights from this study can lead to targeted risk communication. (Selim Jürgen Ergun, Zehra D. Karadeniz & M. Fernanda Rivas , more at nature.com)
The Climate Outreach Talking Climate Handbook provides evidence-based guidelines for constructive and meaningful conversations about climate change in everyday life. It aims to promote understanding, find common ground and inspire action by building connection and respect.
This practical resource offers tools to engage diverse audiences, overcome conversational challenges, and strengthen climate protection through dialogue. Aimed at individuals passionate about climate change, the guide promotes inclusivity and effective communication strategies.
Summary of the document #TalkingClimate Handbook
This document, entitled "#TalkingClimate Handbook: How to have conversations about climate change in everyday life", focuses on how to have constructive conversations about climate change with friends, family, acquaintances and strangers.
Principles of REAL TALK
The document sets out the principles REAL TALK, which should be followed in constructive climate talks:
More tips
The document also provides additional tips for conducting successful climate conversations:
Conclusion
The paper emphasizes that every conversation about climate change is valuable and encourages readers not to be afraid to talk about this important issue. (More on climate-pact.europa.eu)
Ice samples from Antarctica are a unique record of the past of our planet. These ice archives store air bubbles that allow us to analyze the composition of the atmosphere over hundreds of thousands of years. Research in recent years points to significant changes in greenhouse gases, especially greenhouse (CO₂) and methane (CH₄) concentrations, which are related to land-based fluctuations.
What do the new findings say?
According to a recent analysis of the concentration of CO₂ and CH₄ trapped in the Antarctic ice, we must assess that the level of these gases always rises during the warming between ice ages. However, this rise was gradual and naturally conditioned by changes in solar radiation and other geophysical changes. In contrast to the current rate of CO₂ growth is unprecedented and primary human activity such as burning fossil fuels and deforestation.
Studies so far that:
Historical and current trends
Evidence from ice cores shows that when CO₂ rose in the past, Earth's temperature rose, triggering positive feedbacks such as melting permafrost and releasing methane. However, the current increase in CO₂ and methane is taking place over a much shorter period of time, which increases the risk of disruption of the climate system.
Scientists fear that the rapid increase in greenhouse gases may activate the so-called a rupture of a climatic body, such as the destabilization of the Antarctic ice sheet or the massive release of methane from the seabed and permafrost.
What are the implications for the future?
Antarctic ice research highlights that the atmosphere is very sensitive to changes in greenhouse gases. Current emissions can cause warming of more than 2°C compared to the pre-industrial era, the limit set by the Paris Climate Agreement.
What can we do?
To say the worst case scenario, scientists appeal to:
Conclusion
Data from glaciers provide us with a warning: natural fluctuations in greenhouse gases have always affected the Earth's climate, but the speed and scale of current changes are completely unprecedented. If we do not act now, we will face dramatic challenges on a global scale. Spring
More details about these researches can be found on the pages published in the journal Nature Geoscience.
Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.
November 17 424.09 ppm
Safe concentration: 350 ppm
ppm – the number of particles of carbon dioxide per million particles of air.
More on gml.noaa.gov
With her signature scarf draped over her shoulders and her silver hair pulled back from her face, Jane Goodall radiates calm — even through our slightly blurry video call. In a Viennese hotel room, she is surrounded by a press team and a small group of filmmakers documenting her latest speaking tour.
The famous primatologist and conservationist sits on a chair with a high back that exceeds her slim figure.
I see on my screen that behind her on the shelf is her monkey, Mr. H.
The toy was given to her almost 30 years ago by a friend and she traveled the whole world with it. Dr. Goodall is now 90 years old and she and Mr. H are still on the road.
"I'm a little exhausted," she admits. "I came here from Paris." And then I go to Berlin, then to Geneva. On this tour, I am talking about the danger to the environment and some remedial measures,” he says. (Victoria Gill, more at bbc.com)
In 2004, a trio of researchers published a study , which achieved something that had never been seen before. They calculated the specific contribution that human-caused climate change has made to individual extreme weather events. The extreme event in question was the heat wave in Europe in the summer of 2003. Week after week, the extreme heat had a devastating impact, killing more than 70,000 people across the continent.
Scientists have found that human influence has at least doubled the risk of such an extreme heat wave occurring. The findings made headlines around the world. (Robert McSweeney and Ayesha Tandon, Design and development by Kerry Cleaver, Tom Pearson and Tom Prater, more at interactive.carbonbrief.org)
Countries vary widely in the extent to which they seek to decarbonize their economies and in the approaches they take. Much research points to how "political will" varies from country to country. The public, politicians and interest groups support climate action to varying degrees in different countries. That is why strong climate coalitions are emerging in some places, but not in others. While political will is an important driver of national climate ambitions, a country's ability to implement climate policy – especially its institutional and fiscal capacity – is also important. (Jonas Meckling & Ari Benkler , more at nature.com)
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