Climate Change: Real Data from NASA Science and What Awaits Us in the Coming Years

Climate change is no longer a matter of future predictions: it is a measurable reality, documented and monitored in real-time by satellites, weather stations, and researchers distributed across every corner of the planet. While public debate continues to swing between alarmism and denial, the scientific community speaks a precise language, made of degrees Celsius, parts per million, and thermal anomalies. Understanding this data is not an academic exercise: it is the first step to comprehending the world we live in and the world we will inhabit.

NASA, together with NOAA (National Oceanic and Atmospheric Administration), the European ESA, and dozens of international research institutes, has been collecting extraordinarily detailed information about Earth's climate for decades. Thanks to satellite constellations like the GRACE-FO mission — which monitors glacier mass — or GEOS-5 for atmospheric composition, we now have a photograph of the planet with precision unthinkable even twenty years ago. And that photograph shows unmistakable trends.

In this article we analyze the real data available as of May 2026, explore what climate models tell us about the near future, and attempt to answer the question many are asking: is there still room to reverse course, or have we already crossed the point of no return?

The Real Data: Temperature, CO₂, and Glaciers in 2025-2026

2025 has officially broken the historical record for average global temperature, registering an anomaly of +1.54°C compared to the preindustrial era (average 1850-1900). This is confirmed by both NASA's GISTEMP dataset and the HadCRUT analysis from the UK Met Office. For the first time in instrumental history, an entire solar year has exceeded the +1.5°C threshold identified by the Paris Agreement as a critical limit not to be exceeded.

CO₂ concentration in the atmosphere reached 427.8 parts per million (ppm) in March 2026, according to measurements from the Mauna Loa Observatory in Hawaii. In 1958, when systematic measurements began, the value was 316 ppm. In the preindustrial era it hovered around 280 ppm. The increase has accelerated: in the 1960s it grew by about 0.7 ppm per year; today annual growth exceeds 2.5 ppm.

Arctic glaciers tell the same story. The NASA GRACE-FO mission has detected that Greenland loses on average 280 billion tons of ice per year, contributing approximately 0.8 mm per year to sea level rise. Antarctica adds another 150 billion tons lost each year. Global average sea level has risen 22 centimeters since 1880, but the rate of rise has tripled over the last thirty years: today we see an increase of about 3.7 mm per year.

Among the most concerning data is also the behavior of the oceans. The heat stored by the oceans reached record levels in 2025 for the fifteenth consecutive year. The oceans absorb approximately 90% of the extra heat trapped by the greenhouse effect and 25-30% of human-emitted CO₂, but this ecosystem service comes at a cost: ocean acidification. The average pH of the oceans has dropped from 8.2 to 8.1 in just over a century — a change that seems minimal but represents a 26% increase in acidity, with devastating effects on organisms that build calcium shells, from coral to plankton.

Scientific Projections: What Awaits Us by 2050 and 2100

Climate science is not limited to documenting the past: through increasingly sophisticated computational models, it traces probabilistic scenarios for the future. The sixth report of the IPCC (Intergovernmental Panel on Climate Change), published in 2021-2022 and whose projections remain the most authoritative scientific reference, identifies several possible scenarios based on the policies adopted by humanity.

SSP1-1.9 Scenario (optimistic): net zero emissions by 2050, warming stabilized around +1.5°C by end of century. Requires radical and rapid transformation of energy, transport, agriculture, and industry globally.

SSP2-4.5 Scenario (intermediate): partial climate policies, warming between +2.1°C and +3.5°C by 2100. This is considered the most likely scenario based on policies currently in effect in major countries.

SSP5-8.5 Scenario (pessimistic): business as usual, massive use of fossil fuels; warming between +3.3°C and +5.7°C by 2100. A scenario that would make vast areas of the planet uninhabitable.

The concrete consequences predicted for the coming decades include:

• Sea level rise: between 0.3 and 1 meter by 2100 in the intermediate scenario, with risk of exceeding 2 meters in the pessimistic one. Coastal cities like Venice, Miami, Jakarta, and Shanghai are already on the front lines.
• Extreme events: the frequency and intensity of heat waves, droughts, floods, and hurricanes is destined to increase. Climate attribution studies — an emerging discipline supported by NASA research — demonstrate that events like the 2021 European heat wave or the 2022 Pakistan floods would have been practically impossible without anthropogenic warming.
• Food security: yields of fundamental crops like wheat, rice, and corn could decline by 2-6% per decade, just as the world population continues to grow.
• Climate migration: the IOM estimates that between 200 million and 1 billion people could be forced to relocate by 2050 due to flooding, drought, or temperatures incompatible with outdoor life.
• Biodiversity loss: with warming of +2°C, 18% of insect species, 16% of plants, and 8% of vertebrates would lose over half of their current geographic habitat.

Science from Space: How NASA Monitors Climate from Earth

One of the most powerful tools in combating understanding of climate change is satellite observation. NASA manages one of the most complete Earth Science fleets in the world: over twenty active missions dedicated to monitoring the Earth system.

The OCO-3 mission (Orbiting Carbon Observatory), installed on the International Space Station, maps the global distribution of CO₂ with a spatial resolution never achieved before, allowing identification of major emission sources — cities, power plants, forest fires — and major absorption "sinks." OCO-3 data has revealed, among other things, that the tropical forests of the Brazilian Amazon are dangerously approaching the point of being a net source of CO₂ rather than a sink, a combined effect of deforestation and drought.

The PACE mission (Plankton, Aerosol, Cloud and ocean Ecosystem), launched in 2024, studies how atmospheric aerosols and ocean ecosystem influence the carbon cycle. This is fundamental research because marine phytoplankton — microscopic organisms — is responsible for approximately half of global photosynthesis: understanding whether its populations are declining due to warming is crucial for future projections.

The Landsat program, active since 1972, provides an invaluable historical series of images of Earth's surface: thanks to this data it is possible to precisely track tropical deforestation, mountain glacier retreat, desert expansion, and global urbanization over more than fifty years.

But research does not happen only from space. Networks of ocean buoys, polar weather stations, stratospheric balloons, and boreholes in Antarctic ice — the so-called ice cores, which preserve air bubbles dating back 800,000 years — provide complementary data that climate models integrate to produce increasingly precise projections.

Solutions and Research: What Science Can Still Do

Faced with such worrying numbers, the question that every informed reader poses is inevitable: what can we do? The honest answer is that solutions exist, that science is developing them rapidly, but that the window of time to implement them effectively is narrowing.

On the renewable energy front, technological progress has been extraordinary: the cost of photovoltaics has collapsed by 90% in the last decade, making solar the most economical energy source in history in many regions of the world. Offshore wind is achieving enormous productive capacity. The challenge now is energy storage and infrastructure transition.

Research on carbon capture — both technological, through Direct Air Capture plants, and natural, through reforestation and wetland restoration — is accelerating rapidly. However, the current scale of these technologies is still far from necessary impact: today existing DAC plants capture less than 0.01% of annual global emissions.

On the adaptation front, science is developing crop varieties resistant to drought and high temperatures, early warning systems for extreme events (in which NASA satellite data plays a crucial role), and new materials for building cities more resilient to heat.

An emerging and controversial field is solar geoengineering: the proposal to inject reflective particles into the stratosphere to temporarily reduce the amount of solar radiation reaching the surface. Recent studies, including research conducted by Harvard and MIT, suggest it could reduce temperatures by fractions of a degree, but the risks — altered precipitation, ozone layer damage — remain poorly understood. The scientific community is divided: most believe that research should continue but that any large-scale application would be premature and potentially dangerous.

Frequently Asked Questions

Q: Did 2025 really exceed the +1.5°C threshold set by the Paris Agreement? A: Yes, but with an important distinction. The Paris Agreement refers to a long-term average, not a single year. However, the fact that 2025 exceeded this threshold on an annual basis is considered by the scientific community a very serious warning signal, indicating the speed of current warming.

Q: Is NASA really reliable as a source on climate data, or are there political interests? A: NASA climate data is produced by scientists and published in peer-reviewed international journals. The same trends are independently confirmed by agencies from dozens of different countries — including the European ESA, UK Met Office, and Japanese JAXA — making any hypothesis of global coordination of misinformation simply implausible.

Q: Is it possible that climate change has natural rather than anthropogenic causes? A: Natural climate cycles exist and are well documented, but science has demonstrated that they cannot explain current warming. Milankovitch cycles, solar activity, and volcanism do not produce the spectroscopic and isotopic signature we observe today. Only the increase in fossil-origin CO₂ emissions corresponds to the data we detect.

Q: How much time do we have left before reaching a point of no return? A: Some points of no return may already have been reached, such as destabilization of certain Antarctic ice shelves. The "carbon budget" — the amount of CO₂ still emittable to keep warming within +1.5°C — is estimated at approximately 300-400 billion tons of CO₂, equal to about 7-10 years of current global emissions.

Q: What can an individual do against climate change? A: Individual actions matter, although structural emissions require systemic change. Reducing air travel, adopting a diet low in red meat, choosing renewable energy, and supporting politicians who adopt ambitious climate policies are the individual actions with the greatest impact documented by scientific literature.

Conclusion

Real data on climate change speak clearly: we are in territory without precedent in human history, and probably in the planet's history of the last three million years. Science — from NASA research to ESA satellite missions, from Antarctic glaciology laboratories to Pacific oceanographers — has built a coherent, solid, and unfortunately concerning picture.

But the same science that diagnosed the problem offers us the tools to address it. The energy transition is economically feasible, the technologies exist, and every fraction of a degree of warming avoided translates into lives saved, ecosystems preserved, coastal communities protected. The window is not yet closed — but it is closing.