The Gulf Stream brings warm water northeast from the tropics, so London is milder than Calgary even though it is farther north. Mountains like the Alps and Pyrenees block weather systems, creating wet slopes on one side and dry rain shadows on the other. Your distance from the Atlantic or Mediterranean determines whether you get maritime moderation or the wild temperature swings of a continental interior. Latitude controls how much sunlight reaches you. Latitude affects how much sunlight you get.

These patterns aren’t staying put. I made maps showing how European climate zones have moved since 1930 and where they’re going by 2099. The data comes from Beck et al. (2023) at 1-kilometer resolution. A general northward migration is the current trend. For climate codes and their meanings, check my earlier post on global classifications.

Today’s map shows what most Europeans recognize. According to the map, Portugal’s coast is surrounded by a Mediterranean climate (Csa, Csb). Oceanic climate (Cfb) blankets Britain, Ireland, France, Western Germany, and the Atlantic-facing coasts. Northern Italy and parts of the Balkans get humid subtropical (Cfa). Central and eastern Europe from East Germany through Poland and into Russia have humid continental (Dfb). Northern Scandinavia and Russia have subarctic (Df). The Alps, Pyrenees, and Carpathians hold cool mountain climates (Cfc) with tundra patches (ET) on the highest summits. Spain’s interior plateau and areas around the Black Sea and Caspian Sea show semi-arid zones (BSk).

A Century of Northward Movement

Climate zones have been on the move for decades.

The early 1900s (1901–1930) versus today (1991–2020).

The Mediterranean climate has shifted north into southern France and expanded in the Balkans. Oceanic zones have moved into areas that used to be more continental. Humid continental climates have shifted northeast. Subarctic zones in Scandinavia have pulled back northward. Mountain tundra has retreated to higher elevations.

Projections to Century’s End

For the future, I used the most possible SSP2-4.5 scenario where emissions plateau by mid-to-late century.

Today versus late this century (SSP2-4.5).

By 2099, the movement speeds up. The Mediterranean climate extends deep into southern France and spreads into more of the Balkans and Spain’s interior. Humid subtropical zones expand northward from Italy and the Balkans toward Poland. Continental climates shift further northeast, with cooler variants pushed into areas that are currently subarctic. Subarctic zones retreat dramatically in Scandinavia and Russia. Mountain tundra disappears from all but the highest Alpine peaks. The UK and Ireland see their oceanic climate become warmer. Some southern European areas cross from Mediterranean into semi-arid steppe.

From 1930 through 2099.

Over this timespan, climate zones migrate hundreds of kilometers northward. In 1930, Mediterranean stayed on the Mediterranean. By 2099, it’s in southern France. What was oceanic becomes Mediterranean. What was continental becomes oceanic. What was subarctic becomes continental. Some areas that were Mediterranean become semi-arid as temperatures rise and precipitation patterns shift.

The coldest zones contract toward the Arctic coast or disappear. This changes agriculture, water supplies, forests, and what kinds of buildings you need. Wine regions migrate north. Forests adapted to cooler conditions struggle with heat. Rivers change when they flood. Buildings designed for one climate face another. Species that need specific conditions either lose habitat or expand their ranges.

I made maps for 1931–1960 and 2041–2070 too. The full sequence:

Data and Methods: Maps use the 1 km Köppen-Geiger dataset from Beck, H.E., et al. (2023), “High-resolution (1 km) Köppen-Geiger maps for 1901–2099 based on constrained CMIP6 projections,” Scientific Data 10, 724 (https://www.nature.com/articles/s41597-023-02549-6).

The post Europe’s Climate Zones Are Shifting North: Köppen-Geiger Maps from 1930 to 2099 appeared first on Vivid Maps.

But elevation and rain shadows create exceptions. The mountains have cool-summer oceanic climate (Cfc). South Island’s Southern Alps hold patches of subarctic climate (Dfc) and even tundra (ET) on the highest peaks. Around Canterbury and into Central Otago on South Island, the mountains block enough rain to create New Zealand’s only dry zone: cold steppe (BSk). Parts of inland South Island get cold enough for humid continental climate (Dfb).

These cooler and drier zones are changing. I made maps tracking how New Zealand’s climate zones have moved since 1930 and where they’re going by 2099, using high-resolution Köppen-Geiger data from Beck et al. (2023) at 1-kilometer resolution (for climate codes and their meanings, see my earlier post on global classifications).

Today’s map shows oceanic climate (Cfb in green) covering most of both islands. This is the mild, damp climate New Zealand is known for. In the mountains, you find cool-summer oceanic (Cfc) where elevation keeps temperatures lower. The Southern Alps on South Island hold small areas of subarctic (Dfc) and tiny patches of tundra (ET) on the highest peaks. Central Otago shows the country’s only semi-arid zone: cold steppe (BSk) where the mountains create a rain shadow. Parts of inland South Island have humid continental climate (Dfb) with colder winters than the coast.

Changes Since 1930

Over the past century, the cooler and drier zones have contracted.

Comparing the early 1900s (1901–1930) with modern times (1991–2020).

Since 1930, the cold steppe (BSk) in Otago has expanded and become more pronounced. But the cool climates have shrunk. Cool-summer oceanic (Cfc) has contracted in the mountains. Humid continental (Dfb) zones have gotten smaller. Subarctic (Dfc) areas have pulled back to higher elevations.

Projections to Century’s End

For future projections, I used a more realistic SSP2-4.5 scenario.

Today’s climate versus projections for the late 21st century (ssp2-4.5).

By 2099, the changes become more dramatic. Cool-summer oceanic climate (Cfc) disappears from North Island entirely. On South Island, Cfc, Dfc, and ET all shrink substantially. Even the cold steppe (BSk) in Otago contracts. The tundra patches on the highest peaks would vanish or become extremely restricted. The subarctic zones would retreat to only the very highest remaining areas.

The full span: 1930 to 2099.

From 1930 to 2099, New Zealand loses much of its climate diversity. The cool mountain climates that create distinct ecosystems and support unique species contract dramatically.

New Zealand’s mountain ecosystems depend on these cool climates. Alpine plants adapted to cold conditions lose habitat as zones move upslope. Snow cover decreases, affecting rivers fed by mountain snowmelt. Glaciers continue retreating.

Data and Methods: All maps use the 1 km Köppen-Geiger dataset from Beck, H.E., et al. (2023), “High-resolution (1 km) Köppen-Geiger maps for 1901–2099 based on constrained CMIP6 projections,” Scientific Data 10, 724. Available at: https://www.nature.com/articles/s41597-023-02549-6.

The post New Zealand’s Shrinking Cool Climates: Köppen-Geiger Maps from 1930 to 2099 appeared first on Vivid Maps.

The population hugs the coasts. Sydney, Melbourne, and Brisbane line the east coast where oceanic and humid subtropical climates (Cfb, Cfa) deliver enough rain to support cities. Travel north and you’ll reach the tropics, featuring savannah (Aw) and rainforest (Af) throughout the Top End, where the monsoon dictates the seasons. Perth sits on the west coast in Mediterranean climate (Csa), sharing that weather pattern with California, the Mediterranean Basin, central Chile, South Africa’s Cape, and southwestern Australia. Tasmania gets oceanic climate (Cfb) with cool, damp conditions year-round, its mountains even cooler (Cfc). A narrow band of cold desert (BWk) runs along the southern coast, squeezed between interior desert and ocean.

I tracked how these zones have moved since 1930 and where they’re going by 2099 using data from Beck et al. (2023) at 1-kilometer resolution. The pattern: deserts spreading (for climate codes and their meanings, check my earlier post on global classifications).

Today’s map shows what you’d expect from the driest continent. Hot desert (BWh) dominates the interior in deep red. Hot steppe (BSh) in orange surrounds it. These two zones cover about two-thirds of the landmass.

The east coast concentrates Australia’s population. Sydney gets humid subtropical climate (Cfa): rain every month, hot summers. Northerly, between Brisbane and Townsville, you find patches of dry-winter subtropical (Cwa). Keep going to the north, and proper tropical climates take over: rainforest (Af), where rainfall remains heavy, and savannah (Aw), where the year is sharply divided between wet and dry seasons. Melbourne and the southeast have oceanic climate (Cfb) with moderate temperatures and rain spread throughout the year.

The south coast shows a thin strip of cold desert (BWk) trapped between the interior desert and the Southern Ocean. Perth has Mediterranean climate (Csa): summers dry out, winters get wet. South of Perth, that becomes warm-summer Mediterranean (Csb). Tasmania has oceanic climate (Cfb), with its central mountains cool enough to cross into Cfc.

A Century of Desert Expansion

The past century shows a consistent pattern: dry zones spreading.

Comparing the early 1900s (1901–1930) with modern times (1991–2020).

By the 1960s, hot desert (BWh) was already expanding, particularly toward the west coast. Around Perth, the Mediterranean and steppe zones (Csa, Csb, Bsk, Bsh) were getting pushed together as the desert grew outward. Hot steppe (Bsh) was pulling back slightly from the east coast.

By 1990, both BWh and BSk had grown larger. Bsh was advancing toward the east coast. BWh was pushing south, compressing the cold desert (BWk) belt along the southern coast into a narrower strip.

Today, hot steppe (BSh) has expanded both toward the northeast coast and in the opposite direction inland, taking over areas that used to be hot desert. The hot desert itself has moved along the southwestern coast, putting more pressure on the Mediterranean and steppe zones around Perth. The cold desert (BWk) running along the south coast has thinned noticeably.

Projections to Century’s End

For future projections, I used the most likely ssp2-4.5 scenario where emissions plateau by mid-to-late century.

Today’s climate versus projections for the late 21st century (ssp2-4.5).

By the 2070s, hot desert (BWh) and hot steppe (Bsh) keep growing. The cold desert (BWk) along the southern coast is disappearing.

By 2099, the expansion accelerates. Hot desert and hot steppe push closer to the east coast where Sydney, Brisbane, and other major cities are located. They also encroach further on Perth’s Mediterranean climate zone along the west coast. The comfortable, habitable climate zones that support most of Australia’s population are getting compressed toward the coasts.

The full span: 1930 to 2099.

Over this timespan, interior deserts advance hundreds of kilometers outward. The expansion comes from multiple directions: pushing toward the east coast, toward the west coast, and south. Steppe zones advance toward the population centers on the east coast.

Major Australian cities are situated on the coasts because these areas receive adequate rainfall and experience moderate temperatures. When desert and steppe zones creep coastward, the consequences multiply. Water gets scarcer. Farmland becomes more marginal. Heat waves intensify. Fire seasons lengthen. The livable zones contract.

I also created maps for climate normals 1931–1960 and 2041–2070 as well. Here’s the full sequence:

The post Australia’s Expanding Deserts: Climate Maps from 1930 to 2099 appeared first on Vivid Maps.

But head into the mountains and things change. The Pennines running down northern England get cool enough to qualify as Cfc (cool-summer oceanic). The Scottish Highlands go further: the Grampians have spots of Dfd (very cold winter continental) and even tiny patches of ET (tundra) on the highest summits. These are the only genuinely harsh climates in the British Isles (For the climate codes and what they mean, check my earlier post on global climate zones.).

At least for now. I created maps showing how these climate zones have changed since 1930 and where they’re projected to go by 2099, using high-resolution Köppen-Geiger data from Beck et al. (2023) at 1-kilometer resolution.

Today’s map shows what you’d expect: green across almost everything. That’s Cfb, the oceanic climate. Ireland is entirely Cfb, as it has been and will remain through the entire span of these projections. The maritime influence is too strong for anything else.

Britain shows the same pattern across most of its area. But zoom into the uplands and exceptions appear. The Pennines display Cfc on their highest ground. Head north to Scotland, and the Grampian Mountains hold small areas of Dfd and even tinier patches of ET. Elevation creates these zones. Walk up a Scottish mountain and you can pass through multiple climate types in a single afternoon. The highest peaks stay cold enough that only tundra plants can survive there.

Changes Since 1930

Even in the relatively stable climate of the British Isles, a century of warming shows up.

Early 20th century climate (1901–1930) versus modern climate (1991–2020).

The changes are subtle but measurable. The coldest zones in the Scottish Highlands have contracted. Areas that were Dfd or ET in 1930 have warmed enough to reclassify. The Pennines show similar but smaller changes. Across the lowlands, the shifts are minimal because the maritime influence dampens temperature swings. Ireland remains entirely Cfb.

Projections to Century’s End

For future projections, I used the ssp2-4.5 scenario where emissions plateau by mid-to-late century.

Current climate versus late-century projections (after 2077, ssp2-4.5).

By the 2070s, the Pennines lose their Cfc zones entirely. The whole range becomes Cfb. What counted as cool-summer oceanic crosses into warm-summer oceanic.

The Scottish Highlands change more dramatically. By the 2070s, the tundra patches (ET) disappear completely. The Grampians hold onto Dfd zones but lose their coldest characteristics. The highest peaks in the British Isles would no longer experience the extreme cold that defines their current ecology.

From 1930 through 2099.

Over the full timespan, you watch the coldest zones retreat upslope and then vanish. In 1930, Scottish mountains held multiple climate zones stacked by elevation. By 2099, that diversity collapses.

Alpine and tundra plants that currently survive on Scottish summits are adapted to cold that will no longer exist. Species like mountain hare, ptarmigan, and dotterel depend on those conditions. Snow patches that persist through summer would melt earlier or disappear entirely. The mountains would look and function differently than they do now.

I also made maps for 1931–1960 and 2041–2070. The full animation:

British Isles climate zones from 1931–1960 through 2041–2070.

The post Climate Zones of the British Isles appeared first on Vivid Maps.

I used the high-resolution Köppen-Geiger dataset from Beck et al. (2023), which covers 1901 through 2099 at 1-kilometer resolution, to visualize Canada’s climate zones. (My previous post on global climate zones includes the full table explaining what each climate code means, if you want the details.)

On the map above, the high Arctic islands appear in gray: ice caps (EF) and tundra (ET). Below that sits an enormous belt of subarctic (Dfc) and hemiboreal (Dfb) climates covering most of Canada’s forested area from Yukon to Labrador.

The southern part of the country shows more variety. The Great Lakes region and southern Quebec range from Dfb to Dfa in the warmest areas. British Columbia’s coast stays mild year-round thanks to the influence of the Pacific (Cfb). Interior valleys in Alberta hold some of Canada’s only semi-arid pockets (BSk), found in rain shadows.

Changes Since 1930

Over the past century, Canada’s climate zones have moved north.

Early 20th century climate (1901–1930) versus modern climate (1991–2020).

Tundra has pulled back from the mainland. Areas that were treeless a century ago now support scattered spruce. The tree line has crept northward in many places, though not uniformly. Subarctic zones have shifted too. Parts of northern Manitoba, Saskatchewan, and Ontario that were firmly subarctic a hundred years ago now edge into warmer classifications.

Projections to Century’s End

For future projections, I used the SSP2-4.5 scenario (the most likely scenario), in which emissions rise until mid-century and then level off.

Current climate versus late-century projections (after 2077, ssp2-4.5).

By the late 21st century, changes become dramatic. The subarctic zone moves hundreds of kilometers north. reaches the High Arctic islands.

The tree line advances north. Permafrost thaws across huge areas. Hudson Bay’s ice-free season lengthens. Southern Canada warms considerably. The Great Lakes and St. Lawrence regions would see longer summers and less severe winters.

From 1930 to the end of the 21st century.

From 1930 to 2099, zones travel substantial distances. What’s tundra in 1930 becomes subarctic forest by 2099. What’s subarctic in 1930 becomes continental (hemiboreal) by 2099.

I also created maps for 1931–1960 and 2041–2070. The full animation shows the progression:

Data and Methods: All maps use the 1 km Köppen-Geiger dataset from Beck, H.E., et al. (2023), “High-resolution (1 km) Köppen-Geiger maps for 1901–2099 based on constrained CMIP6 projections.

The post Canada’s Shifting Climate Zones: Köppen-Geiger Maps from 1930 to 2099 appeared first on Vivid Maps.

But how do we make sense of all this diversity? Average temperatures alone don’t capture the full picture. A place can have the same annual average temperature as another yet support completely different ecosystems depending on when rain falls, how severe winters get, or how long the growing season lasts. That’s where the Köppen–Geiger climate classification becomes invaluable. Developed over a century ago and refined ever since, it remains the most widely used system worldwide because it ties climate directly to what actually grows on the ground. Instead of just measuring averages, Köppen–Geiger groups places by temperature thresholds and seasonal precipitation patterns, which means the classification naturally aligns with vegetation zones and ecosystems.

For this post, I created a series of climate maps showing how these zones have moved across the United States over the past century and how they’re projected to shift by the end of this century. All the maps use high-resolution (1 kilometer) data from Beck et al. (2023), who combined historical climate records with downscaled projections from the latest generation of climate models. Their dataset provides consistent 30-year climate normals from 1901 all the way through 2099, making it possible to track changes across nearly two centuries.

Understanding the Climate Codes

Each Köppen–Geiger code has two or three letters: the first describes the general climate group (A = tropical, B = arid, C = temperate, D = cold/continental, E = polar), and the following letters add details about precipitation patterns and temperature extremes.

The Southeast of the United States is dominated by humid subtropical climate (Cfa in lime green), where hot summers and year-round rainfall support deciduous forests and intensive agriculture. Move to the north, and you will find regions with a climate where severe winter cold meets hot or warm summers (Dfa and Dfb in cyan and bright blue). The interior West displays a progression from semi-arid steppe (BSk in yellow) to true desert (BWk and BWh in reds and pinks) across rain-shadow basins where mountain ranges block Pacific moisture. California’s coast shows those distinctive Mediterranean strips (Csa and Csb in yellows) where summers stay dry and winters bring the rain. The Pacific Northwest features oceanic climate (Cfb in green) with mild temperatures and abundant year-round precipitation. Mountain ranges create narrow vertical bands of cooler climate types, compressing what would normally be hundreds of kilometers of latitudinal change into just a few kilometers of elevation. Alaska holds onto the polar and subarctic zones (ET, EF, Dfc, Dfd in grays and dark teals), the coldest climates found anywhere in the United States.

Looking Back: How Climate Zones Moved in the 20th Century

Climate isn’t static. When we compare the early 20th century (1901–1930) with the late 20th/early 21st century (1991–2020), shifts become visible. The polar and coldest continental zones have pulled back northward. Temperate zones have crept north into areas that were once colder. In parts of the interior West, arid and semi-arid zones have expanded as precipitation patterns changed and temperatures rose.

Comparing 1901–1930 with 1991–2020 climate zones.

Watch Alaska especially in this comparison. The tundra zones (ET in gray) have contracted, and subarctic zones (Dfc, Dfd) have shifted. In the northern Great Plains and upper Midwest, some of the coldest continental zones (Dfb, Dfc) have given ground to slightly warmer classifications. The Southeast has seen its humid subtropical zone expand slightly northward. The mountain West shows more localized changes, with some steppe zones becoming more arid and high-elevation zones warming enough to shift categories.

What Happens by Century’s End

Looking toward 2099 requires choosing a projection scenario. Climate scientists work with several possible futures depending on how emissions, technology, and global policy evolve over the coming decades. They call these Shared Socioeconomic Pathways, or SSPs. None of them are crystal-ball predictions. Instead, they’re frameworks that ask “what if this happens?”

For these maps, I used ssp2-4.5. It sits in the middle range: emissions keep rising for a few more decades, then level off as cleaner technology spreads and some climate policies take hold. It’s not the best-case scenario, but it’s not the worst either. Most researchers consider it a realistic reference point because it assumes neither rapid global transformation nor complete inaction.

Climate zones today (1991–2020) compared with late-century projections (2077–2099, ssp2-4.5).

The trends visible in the 20th century accelerate. Alaska’s tundra zones retreat dramatically northward toward the Arctic coast. Subarctic zones shrink. In the Lower 48, cold continental climates (Dfa, Dfb, Dfc) pull back from the upper Midwest and northern Plains, replaced by temperate classifications. The humid subtropical zone (Cfa) pushes northward into areas that were once continental. Look at the Great Basin and the Southwest: the reds and pinks of true desert spread wider, and the yellows of steppe move into areas that once got more reliable moisture. Mountains still buffer some of the warming because elevation keeps temperatures cooler, but even in the Rockies and Cascades you can see zones creeping upslope. The Pacific coast changes less dramatically than inland areas because the ocean moderates temperature swings, but warming still shows up even there.

The Full Century and Beyond

When you step back and look at the full span from 1901–1930 to 2077–2099, the magnitude of change becomes clear.

Climate zones from 1901–1930 to 2077–2099.

Zones that dominated northern states in 1930 have vanished or retreated to Canada by century’s end. The geographic center of many climate types shifts hundreds of kilometers northward. Alaska transforms from a predominantly subarctic and polar region to one where subarctic zones dominate and tundra becomes confined to the northernmost coast. Georgia’s climate starts looking more like northern Florida used to. Kansas and Nebraska lose some of their coldest winter characteristics. The arid West grows larger.

These changes will mean completely different growing seasons for farmers, different water availability for cities, different fire regimes for forests, different species compositions in ecosystems. The places where certain crops thrive move. The northern limits of pests and diseases move. The places where certain trees can regenerate after disturbance move.

I also created maps for intermediate periods: 1931–1960 and 2041–2070. Using all these time periods together, I put together an animation that shows the progression through the mid-21st century transitions more smoothly.

If you’d like to see static versions of the 1931–1960 or 2041–2070 maps alongside the others, let me know in the comments and I can add those graphics to this post.

The post How America’s Climate Zones Are Shifting appeared first on Vivid Maps.

WHAT IS A MEDITERRANEAN CLIMATE?

A Mediterranean climate (Köppen types Csa and Csb) is defined by a seasonal rainfall pattern: most precipitation falls in cool months, while summers are dry. It’s typically found on the western sides of continents between about 30° and 45° latitude (north and south). That regular seasonality – wet winters, dry summers – shapes both natural vegetation and farming choices.

This particular seasonal rhythm favors a distinctive set of plant communities: drought-tolerant shrubs and small trees, woodlands with hard, leathery leaves, and plants adapted to occasional fires. Those plant communities, taken together, are often called “Mediterranean-type biomes” or “Mediterranean forests, woodlands and scrub.” The same climate pattern shows up in five widely recognized regions on four continents and one island-rich subregion.

It’s easy to assume “Mediterranean” means only the lands ringing the Mediterranean Sea. But the climate pattern repeats elsewhere — and when it does, similar-looking vegetation develops, even though the species are different. Below is the world map created by Reddit user Simple_Pension_1330 that shows Mediterranean biomes around the world.

Mediterranean Basin

This is the largest of the five regions and one of the planet’s major biodiversity hotspots. It supports a huge number of endemic plants and a long history of grazing, orchards and mixed farming. The landscape you picture – terraced hills, olive groves, and coastal scrub – is the result of climate interacting with civilizations over millennia.

California & Baja California

California’s chaparral and oak woodlands are classic examples of plants shaped by dry summers and fire. The region is easy to recognize from photos: dense, shrubby hills and oak-studded slopes. Because many towns and cities press up against these wildlands, fire management is a recurring social and ecological problem.

Chilean matorral

The matorral sits in a narrow coastal band that’s squeezed between the Atacama Desert and cooler temperate forests to the south. It’s the only major Mediterranean-type region in South America and contains many local endemic plants and animals adapted to seasonal drought.

Cape Floristic Region (fynbos)

The Cape floristic province is small compared with the Mediterranean Basin or Australia’s mallee, but it is immensely rich in plant species – thousands of them, with a very large percentage found nowhere else. The fynbos vegetation is fire-prone and botanically famous; the region is protected in part as a UNESCO World Heritage Site.

Mallee woodlands & shrublands

“Mallee” refers to the multi-stemmed eucalypts that dominate large semi-arid plains in southern Australia. These woodlands are well adapted to drought and fire. The national NVIS vegetation classification for this region (MVG14) can be downloaded here: https://www.dcceew.gov.au/sites/default/files/documents/mvg14-nvis-mallee-woodlands-and-shrublands.pdf.

The post Mediterranean Biomes Around the World appeared first on Vivid Maps.

Looking farther ahead – not just a century but thousands to millions of years – the numbers become much larger. If every glacier and ice sheet on our planet melted, global sea level would rise by roughly:

I built maps to show these changes, using height data from the GEBCO 2020 Grid, preprocessed by Sean Bradley.

But I didn’t stop there. I decided to “flood” the planet even further – at least hypothetically. What if Earth received the hidden oceans of other worlds in our Solar System?

Earth’s oceans today contain about 1,335 million km³ of liquid water. But in the Solar System, you can find worlds that can boast of a huge amount of water. Even Pluto likely hides beneath its crust a little less water than our planet.

Here’s how much water a few other ocean worlds might add to our seas:

At that point, our planet would turn into a water world, covered with a multi-kilometer layer of water. For the purposes of visualization, I stopped at Europa – because even Callisto’s water is nearly four times greater than Earth’s.

Below is the animated map I created. It shows major cities fading as they go underwater, while the highest peaks slowly vanish from view as they are submerged.

But while pouring alien oceans onto Earth is just a thought experiment, the opposite direction—our oceans shrinking away—is not. That is the real fate of this planet.

As the Sun slowly brightens, Earth will eventually cross a threshold called the moist greenhouse effect. Once that happens, water vapor will rise high into the atmosphere, break apart under solar radiation, and escape into space.

Models suggest this will begin in about 2.1 billion years. After that tipping point, the oceans could be lost in less than 200 million years—a blink in geologic time.

We are used to considering our planet as something permanent. But the time will come when even the planet will be unsuitable for life, at least in the form that exists now. Therefore, let us take care of our planet and not shorten the time of our possible stay on it.

The post When All the Ice Melts — and When the Oceans Disappear appeared first on Vivid Maps.

Every single county has warmer falls now compared to 1970. We’re looking at 2.8°F (1.6°C) higher temperatures on average when they checked 237 cities. So those cool October mornings? They’re happening later now, or sometimes not at all.

The Southwest leads the pack with increases of 4.0°F (2.2°C). After that comes the Northern Rockies and Plains at 3.5°F (1.9°C). Some places really stand out – Reno is 7.7°F (4.3°C) warmer than it used to be. El Paso jumped 6.5°F (3.6°C), Las Vegas 6.2°F (3.4°C). Up north, the Upper Midwest is up 3.3°F (1.8°C). The Southeast has the smallest changes at 1.9°F (1.1°C), but it’s still warmer there too.

Climate Central created this county-level map showing the changes. Lighter colors show increases around 1°F (0.6°C), dark red shows 5°F (2.8°C) or more warming.

The data comes from NOAA’s climate records – their nClimDiv dataset tracks monthly county temperatures. Those deep red areas concentrated in Arizona and New Mexico really stand out.

I made an interactive version where you can click any county to see its exact temperature change since 1970, displayed in both Fahrenheit and Celsius.

These changes affect daily life in lots of ways. Trees hold leaves longer, bird migration gets disrupted. More bugs survive mild winters. Farmers extend growing seasons. Cities like Phoenix stress power grids with longer heat periods. Water loss from reservoirs gets worse.

Climate Central has the complete dataset going back decades.

Their website has more charts and city breakdowns if you want to dig deeper.

What autumn changes have you noticed? I’m curious about seasonal shifts people are seeing, whether in the US or elsewhere.

The post Fall’s Getting Warmer Across the US appeared first on Vivid Maps.

The user 7LeagueBoots made an atlas of maps that vividly illustrate what will happen to cities located on the shores of the oceans when the world’s oceans rise by 70 meters (230 feet).

North America

Eastern and Southern United States with a 70 meters sea-level rise

North American West Coast

California Coast

Central America

South America

Europe

North Sea Countries with a 70 meters sea-level rise

The Mediterranean and Black Seas

Black, Caspian, and Aral Seas

Asia

Northern Russia with a 70 meters sea-level rise

The Middle East and India

East Asia and the East China Sea

Mainland Southeast Asia

Island Southeast Asia

Africa

Australia

If the sea level rises 100 meters, the consequences will be even more frightening.

The post The world with a 70 meters sea-level rise appeared first on Vivid Maps.