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Last month, 44 climate scientists from 15 countries wrote an open letter to the Nordic Council of Ministers highlighting the risk of a potential collapse of the Atlantic Meridional Overturning Circulation (AMOC), a critical ocean current system in the Atlantic Ocean. But what exactly would cause the AMOC to collapse?
Scientists are sounding the alarm because this warming is shockingly bigbigger than what we would have expected given the long-term warming trend from fossil fuel-caused climatechange. But why were 2023 and 2024 so warm? This question was a focus at the 2024 annual American Geophysical Union (AGU) meeting in Washington, D.C.,
Understanding sea level rise as a long-term, multi-generational problem is essential to comprehending the scale of climatechange and the need for bold action now. While this knowledge may be sobering, it underscores the importance of reducing emissions, holding major polluters accountable, and adapting to a changing world.
Climate models are the main tool climate scientists use to predict how Earth will respond to more heat-trapping pollutants in the atmosphere. But what exactly is a climate model? Lets start off easy by breaking down the phrase climate model.” change at each grid point. What causes a circulation?
It’s 20 years since we started blogging on climate here on RealClimate (December 10, 2004). We wanted to counter disinformation about climatechange that was spreading through various campaigns. The Keeling curve, highlighted with the release of important climate reports and climate summits.
With extreme winter weather breaking out across the United States this week, a question in many people’s minds is—how is climatechange affecting winter storms? Can you start with how climatechange is generally affecting winter weather in the US? The warming ocean is especially important.
According to the United Nations’ Intergovernmental Panel on ClimateChange report published Monday, Southeast Asia coastal zones are among the world’s most climate vulnerable regions. There are a handful of high-impact “tipping points” that could drastically change global or regional water cycles.
The worlds largest fossil fuel and cement producers have known for decades that their products cause climatechange, yet they spread disinformation to misinform the public and have profited as people around the world have suffered from ever-worsening climate impacts.
The IPCC compiles scientific insights on climatechange, informing policymakers and the public about risks and possible actions. In essence, combined with climate models, they provide a way to envision the consequences of different actions or inactions. What Are Future Climate Scenarios? Lower-emission scenarios (SSP1-2.6)
Climate models are the main tool scientists use to assess how much the Earths temperature will change given an increase in fossil fuel pollutants in the atmosphere. As a climate scientist, Ive used them in all my research projects, including one predicting a change in Southwestern US precipitation patterns.
For the first time, the Arctic Report Card assessed that the Arctic is faltering as a reliable area for storing carbon away from the atmosphere ( Natalie et al., It was its first failing grade after thousands of years holding onto more carbon than released to the atmosphere. in Arc2024 ). Methane releases were sustained as well.
Whats the point of a beach adventure if you cant even go into the ocean? How does raw sewage end up in our oceans and rivers? In some cities, a combined sewer system means that usually both wastewater and stormwater get treated to the same high standards before releasing into the ocean. San Francisco City and County v.
I feel like climatechange is going to have to get worse before it gets better. Climatechange has been a big, scary, looming problem for basically the entirety of my life; I cannot remember a time when it was not at least a background concern. This holiday season, I’m especially grateful for their tone of determination.
The IPCC has released its Sixth Assessment Report on the physical science basis of climatechange. Here are a number of the lowlights: It is unequivocal that human influence has warmed the atmosphere, ocean and land. Widespread and rapid changes in the atmosphere, ocean, cryosphere and biosphere have occurred.
Warmer global temperatures cause more water to evaporate from Earth’s surface and oceans, meaning that there is more fuel for storms. Urban infrastructure in many cities was not built for current and future climate pressures. The post Detroit Flooding Previews Risks from a Warming Climate appeared first on Circle of Blue.
I followed with great interest the launch of the sixth assessment report Working Group 1 (The Physical Science Basis) from the Intergovernmental Panel on ClimateChange (IPCC) on August 9th. The cause of our changingclimate is the increase in atmospheric greenhouse gas concentrations that we have released into the air.
Floods can come from rain-on-snow events and from high spring temperatures that melt the snow faster, and climatechange is triggering earlier and faster snowmelt. In the Midwest, Lake Erie has the LEOFS (Lake Erie Operational Forecast System) to better manage water levels affected by seasonal variations and climatechange.
Can the new advisory opinion interpreting the United Nations Convention on the Law of the Sea (UNCLOS) move us beyond the lethargy of unmet climatechange policy needs ? By accepting the COSIS request, ITLOS boldly advanced the international law of climatechange to take full account of its harmful impacts on the marine environment.
Interested in understanding how climatechange affects our groundwater and what it means for the environment and economy? Join PA Sea Grant and the Department of Environmental Protection for the upcoming Pennsylvania Lake Erie Environmental Forum webinar on Groundwater and ClimateChange on November 19 from 1:00 to 3:00 p.m.
Our planet is undergoing significant changes due to climate disruption, with especially severe impacts on the ocean. Most climate action today rightly focuses on reducing greenhouse gas emissions. Unfortunately, these efforts are necessary, but not sufficient to meet global climate targets.
I have a feeling that we are seeing the start of a new wave of climatechange denial and misrepresentation of science. When looking at the effect of changes in greenhouse gases, one must look at how their forcing corresponds to the energy balance at the top of the atmosphere. References. 679-688, 2016.
The spectrum of colors viewed by the PACE satellite can identify different phytoplankton species in the ocean and a variety of aerosols in the atmosphere, helping researchers identify threats to the health of people and the planet.
“Danger Season” refers to the warmer months when, turbo-charged by climatechange, extreme events like heat waves, heavy rainfall, wildfires, and poor air quality bring miserable and often dangerous, conditions. This NASA graphic captures how climatechange affects the extreme weather that tends to play out in Danger Season.
UCS Climate and Energy program policy director Rachel Cleetus breaks down the National Oceanic and Atmospheric Administration's latest report on costly, dangerous climate-related disasters in 2021.
That’s because the parties to the London Convention and London Protocol are meeting from October 28 to November 1 in London to discuss, among other things, governance of ocean alkalinity enhancement and ocean sinking of biomass (e.g. Some are land-based, while others use the ocean. seaweed) for carbon storage.
But with estimates suggesting that sea level rise will affect more than one billion people around the world in the next 25 years, this is one member of the dysfunctional climatechange family that shouldn’t be ignored. As the ocean warms, it expands. That adds water to the oceans, which raises their level. Why is this?
Changing the ocean’s chemical and biological makeup could force it to pull vast amounts of planet-warming carbon from the atmosphere. But is that a line we want to cross?
Here we start by taking the Greenland mass loss rate into the ocean, times the temperature difference between the meltwater and the water it replaces. For the part entering the ocean as ice, we must also consider that to melt ice requires energy. Nature ClimateChange, 5, 475–480, doi:10.1038/nclimate2554. Rahmstorf, S.,
Scientists attribute the drought’s severity to climatechange, deforestation of the Amazon rainforest, and the La Niña weather pattern. By the end of this century, the region’s annual rainfall is expected to drop by up to 30 percent due to climatechange. By Laura Gersony, Circle of Blue — October 4, 2021.
There is another important aspect to what is sometimes called “committed warming,” “climate inertia,” or “zero emissions commitment,” an aspect I wrote about over a decade ago. What are the political implications of the fact that climatechange will continue after emissions cease, or even potentially grow worse? Download as PDF.
Without the considerable carbon absorption capacity of our lands (and oceans), we’d currently have much more CO 2 in the atmosphere and an accelerated timeline of warming. These same environmental changes can also increase carbon losses from land-based ecosystems.
Source: [link] The May 23 outlook from the National Oceanic and Atmospheric Administration ( NOAA ) forecasts 17 to 25 named storms, eight to 13 of which could become hurricanes. NOAA [link] Four to seven major hurricanes are forecast. This is a concerning outlook, and it can be explained as follows.
Today climatechange has broken a new Danger Season record: 76 million people in the US—or 23% of the total population—are currently under extreme weather alerts including heat, flooding, storms, or wildfire weather conditions. High daily maximum temperatures on June 28, 2023 are attributable to climatechange.
On May 21, 2024, the International Tribunal for the Law of the Sea (ITLOS) delivered a long-awaited Advisory Opinion on climatechange and international law. This marks the first time that an international tribunal has issued an advisory opinion on State obligations regarding climatechange mitigation.
Warming temperatures linked to climatechange are a cause, according to researchers for NOAA’s National Centers for Coastal Ocean Science, with interactions among species likely playing a role as well.
Even as world leaders convene in Azerbaijan for COP29 to chart a path forward to avoid a climate catastrophe, the fact is that the world has waited too long for emissions reduction alone to solve the climate crisis. Climatechange is here, and nowhere is this more immediately apparent than in our ocean.
In the US, when we check our local weather forecast, when our communities are recovering from an extreme weather event, or when our fisherfolk are at sea catching food, we are benefitting from the work of the National Oceanic and Atmospheric Administration (NOAA). To understand and predict changes in climate, weather and coasts; 2.
are used all over the world, based on calculations that quantify the effects of physical mechanisms and the way different parts of the atmosphere are connected to each other. The physics-based models describe how energy flows through the atmosphere and ocean, as well as how the forces from different air masses push against each other.
Ocean eddy visualization ( Karsten Schnieder ). and a supportive Nature ClimateChange editorial were published this week, extolling the prospects for what they call “k-scale” climate modeling. In the atmosphere, the mesoscale organization of convection would clearly be another target. 499-503, 2022.
The CERES estimates of the top-of-atmosphere radiative fluxes are available from 2001 to the present. Comparison of CERES SWup trends (blue) with inferred changes in Earthshine (black). 2021) show that the trends in the EEI derived from CERES match what you get from the changes in ocean heat content. It’s unlikely(?)
Gavin Schmidt claims that the benefits of k-scale climate models (i.e. global climate models with grid spacing on the order of 1 km) have been “potentially somewhat oversold” in two recent Nature ClimateChange papers. The benefit of k-scale — which is laid out in the papers ( Slingo et al., 499-503, 2022.
Sprinkling powered basalt over natural ecosystems would remove vast amounts of carbon dioxide from the Earth’s atmosphere while also improving soils. Therefore, most proposed routes to net zero also bank on our ability to capture carbon – at source or directly from the atmosphere – and store it securely over the long term.
Running Tide, a carbon-removal company in the US, has sunk more than 10,000 tonnes of waste wood into the Atlantic Ocean in an effort to reduce carbon dioxide levels in the atmosphere – but experts aren't convinced it will work
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