A simple graphic with no numbers, no axis labels, no legend — just a series of colored stripes ranging from deep blue to blazing red — has become one of the most widely recognized and emotionally resonant climate communications ever created. The “Warming Stripes,” developed by climate scientist Ed Hawkins at the University of Reading in 2018, transformed the way millions of people around the world viscerally understand climate change. Each stripe represents a year’s average temperature relative to the 20th century baseline; the progression from cool blues to angry reds tells the story of our warming world with immediate, gut-level impact that tables of numbers and complex graphs rarely achieve.
The Origin Story: Ed Hawkins and the Power of Simplicity
Professor Ed Hawkins is a climate scientist at the National Centre for Atmospheric Science at the University of Reading, specializing in climate variability and predictability. On May 22, 2018, he posted the first Warming Stripes graphic on Twitter — a visualization of global average temperatures from 1850 to 2018, expressed as colored bars where blue tones represented cooler-than-average years and red tones represented warmer-than-average years. The gradient from predominantly blue in the 19th and early 20th century to a solid band of deep red in recent decades required no scientific background to interpret.
The image went viral almost immediately. Within days it had been shared tens of thousands of times across social media platforms. Scientists, communicators, journalists, and laypeople alike recognized that the visualization had achieved something rare: it made climate data accessible, visceral, and undeniable without requiring the viewer to decode axes, understand statistical concepts, or trust an intermediary’s interpretation. The data spoke directly through color.
Hawkins published the warming stripes under a creative commons license specifically to enable the widest possible dissemination. He also launched the website ShowYourStripes.info, which generates custom stripes for countries, regions, and cities using historical temperature data from NOAA, Berkeley Earth, and other authoritative sources — making the visualization personally relevant to viewers by showing the temperature history of the place where they live.
1. Democratizing Climate Data: The Great Accessibility Revolution
The first transformative impact of the Climate Stripes was their radical democratization of climate data. For decades, public understanding of climate change was mediated through experts, textbooks, and news reports translating complex scientific findings into accessible language. The warming stripes bypassed this translation layer entirely, giving any person — regardless of scientific training, education level, or language — direct, intuitive access to the same underlying data that scientists analyze.
A study published in Communications Earth & Environment (2021) found that exposure to the warming stripes significantly increased viewers’ subjective sense of the reality and severity of climate change, even among respondents who rated themselves as skeptical of climate science before viewing the image. Crucially, the effect was robust across political affiliations — conservatives who were initially skeptical showed measurable shifts in risk perception after viewing the stripes, an effect that abstract graphs and scientific text did not produce. The researchers attributed this to the stripes’ aesthetic clarity: it is difficult to argue with color.
2. Social Media Virality and Cultural Penetration
The warming stripes became one of the most shared climate visualizations in the history of social media. On Twitter (now X), the original post generated hundreds of thousands of interactions within the first month. On Facebook, shares accumulated in the millions over subsequent months. The image crossed language barriers — shared by users from Brazil to Japan, from Germany to Nigeria — because it required no translation. Its color palette communicated across cultures with a directness that words cannot match.
The virality wasn’t limited to climate advocates. Conservative commentators, skeptics, and politically neutral users engaged with the image — sometimes to argue against it, but the argument required engaging with the underlying data, which itself shifted the quality of public discourse. Unlike most climate infographics that preach to the choir of already-convinced environmentalists, the warming stripes penetrated ideologically diverse social networks precisely because they were visually simple and aesthetically striking enough to attract attention before viewers had formed a judgment about whether to engage.
3. Fashion, Art, and Commercial Adoption: Climate Data Goes Mainstream
Few scientific visualizations have achieved the cultural crossover of the warming stripes into fashion, commercial design, and public art. A German broadcasting company (ZDF) used the stripes as a backdrop for weather forecasts, effectively embedding climate context into millions of daily TV weather reports. Multiple fashion designers incorporated the stripe pattern into scarves, ties, and clothing, sold to consumers who wore climate data as an aesthetic and political statement.
The BBC featured the warming stripes prominently in climate coverage. The Guardian incorporated them into its award-winning climate reporting. Climate scientists and activists began wearing stripes as a form of visual identity — a signal to fellow travelers and an invitation to conversation with the uninitiated. The pattern appeared on protest signs, book covers, social media avatars, and public art installations on the sides of buildings in cities including London, Amsterdam, and Berlin.
This cultural mainstreaming reflected and reinforced a broader shift in how climate change was being communicated: moving from dry, technical briefings aimed at policy elites toward visual, emotional, and aesthetically driven approaches designed to reach mass audiences on the terms of popular culture rather than scientific convention.
4. Inspiring a New Generation of Climate Visualization
The warming stripes’ success inspired a broader movement of data-driven climate visualization aimed at public communication rather than scientific publication. The Climate Lab Book blog, the Carbon Brief website, NASA’s Eyes on the Earth platform, and NOAA’s data visualization teams all significantly upgraded their public-facing visualization work in the years following the warming stripes’ success, recognizing the appetite for accessible, visually compelling climate data.
Climate scientists increasingly recognized that peer-reviewed publication in specialist journals, while essential for scientific credibility, reaches a vanishingly small audience compared to a well-designed visualization shared on social media. A new field of climate science communication emerged that explicitly trained scientists in design principles, data visualization best practices, and social media strategy — skills that a previous generation of researchers was never expected to develop. The warming stripes were a catalyst in this cultural shift within the scientific community.
5. The Data Behind the Colors: Scientific Rigor Underneath Aesthetic Simplicity
The warming stripes’ power to communicate was inseparable from the quality of the underlying data and the care with which Hawkins constructed the visualization. The global version uses data from the HadCRUT dataset, jointly maintained by the UK Met Office Hadley Centre and the Climatic Research Unit at the University of East Anglia — one of the most carefully constructed and peer-reviewed global temperature records, incorporating thousands of land and ocean measurement stations dating back to the mid-19th century.
The color scale is calibrated so that the center of the color range (white) corresponds to the 1971-2000 average temperature, with blues representing temperatures below this average and reds above it. The most intense blue represents the coldest year in the record; the most intense red represents the hottest. This calibration ensures that the visual story the stripes tell is scientifically accurate: the warming trend visible in the colors reflects the actual statistical pattern of global temperature change as measured by multiple independent scientific institutions using different methodologies.
6. Driving Policy Conversations at the Highest Levels
Beyond viral social media circulation, the warming stripes have featured in formal policy settings in ways that mark a genuine change in how climate data is communicated to decision-makers. Multiple European parliamentarians and national politicians have displayed warming stripes in committee hearings and public addresses. The UK’s Committee on Climate Change featured the visualization in reports to the government. International climate negotiators at COP meetings have used the stripes in presentations and speeches.
The stripes’ policy impact operates through what communication scholars call “visual agenda setting” — the capacity of compelling images to shift what issues audiences perceive as important and urgent. In a policy environment saturated with data, reports, and competing claims, a visual representation that cuts through complexity and communicates urgency at a glance carries disproportionate agenda-setting power. The warming stripes have demonstrably contributed to the mainstreaming of climate urgency in public and policy discourse — not as the sole driver, but as one of the most effective single artifacts of climate communication ever created.
7. Local Adaptation: Making Global Trends Personal
One of the most powerful features of the ShowYourStripes website is its ability to generate location-specific warming stripes for over 200 countries and territories, and for many sub-national regions. When someone views the warming stripes for their own city or region — and sees the same inexorable shift from blue to red played out in the temperature record of the place where they were born, grew up, or currently live — the psychological impact of proximity and personal relevance is substantial.
Climate change is often experienced as an abstract, distant, global phenomenon — something happening to polar bears in the Arctic or people in Pacific Island nations, not to communities in middle America or central Europe. Location-specific warming stripes directly challenge this perception by showing, with undeniable visual clarity, that the temperature in your state, your country, your city has changed demonstrably and irreversibly within living memory. This localization of a global phenomenon is one of the most effective rhetorical strategies in climate communication.
8. A Symbol of the Broader Data Visualization Revolution in Climate Science
The warming stripes represent the leading edge of a broader transformation in how Earth scientists are communicating their findings to the public. The era of impenetrable scientific jargon, complex multi-axis graphs legible only to specialists, and press releases summarizing findings that no journalist could make accessible is giving way — unevenly but irreversibly — to a new paradigm of science communication that treats visualization and accessibility as first-class scientific responsibilities, not optional extras.
Organizations including NASA’s Scientific Visualization Studio, the European Space Agency’s climate visualization team, NOAA’s National Centers for Environmental Information, and the Copernicus Climate Change Service have all significantly invested in public-facing visualization in the years since the warming stripes demonstrated the communicative and cultural power achievable with climate data rendered visually. A new generation of “climate data artists” — professionals who sit at the intersection of data science, design, and environmental advocacy — has emerged as a recognized occupational category.
For more on how climate data is reshaping public understanding and policy, see our web story on US Carbon Capture Policy 2026, our analysis of The World’s Dismal Performance on Climate Change, and our coverage of Understanding the Basics of Climate Change.
Ed Hawkins created the warming stripes as a personal communication experiment. They became a cultural artifact, a scientific instrument of mass persuasion, a fashion motif, and a political symbol — all while remaining rooted in meticulous empirical data. In a communication environment saturated with competing claims and deliberate misinformation, the warming stripes endure as a testament to the power of clarity: when the data is this compelling, showing it honestly and beautifully is enough.