Top 10 Surprising Results of Global Warming

cloud cover and climate change

Scientists have shown that as the planet warms water vapor, and thus clouds, will increase, trapping even more heat. One scientist, however, suggests random events drive clouds, which then drive warming. (Image credit: Nicolle Rager Fuller, National Science Foundation)

You've probably heard about the effects of global warming: rising temperatures, melting ice caps and rising sea levels in the near future. But Earth's changing climate is already wreaking havoc in some very weird ways. So gird yourself for such strange effects as savage wildfires, 25-mile long icebergs, disappearing lakes, freak allergies, and the threat of long-gone diseases re-emerging.

Forest Fire Frenzy

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Navajo fire crews battle the blaze among parched forest trees and dried out ground cover. (Image credit: Kari Greer/US Forest Service.)

While it's melting glaciers and creating more intense hurricanes, global warming also seems to be heating up forest fires in the United States. In western states over the past few decades, more wildfires have blazed across the countryside, burning more area for longer periods of time. Scientists have correlated the rampant blazes with warmer temperatures and earlier snowmelt. When spring arrives early and triggers an earlier snowmelt, forest areas become drier and stay so for longer, increasing the chance that they might ignite.

Ruined Ruins

Sukhothai Kingdom, a 600-year-old site, is facing threats from global warming.

Wat Si Sawan, Sukhothai National Historical Park. (Image credit: Public Domain.)

All over the globe, temples, ancient settlements and other artifacts stand as monuments to civilizations past, which until now have withstood the tests of time. But the immediate effects of global warming may finally do them in. Rising seas and more extreme weather have the potential to damage irreplaceable sites. Floods attributed to global warming have already damaged a 600-year-old site, Sukhothai, which was once the capital of a Thai kingdom.

Rebounding Mountains

Bleak Outlook for Snowy Peaks

Bleak Outlook for Snowy Peaks

Though the average hiker wouldn't notice, the Alps and other mountain ranges have experienced a gradual growth spurt over the past century or so thanks to the melting of the glaciers atop them. For thousands of years, the weight of these glaciers has pushed against the Earth's surface, causing it to depress. As the glaciers melt, this weight is lifting, and the surface slowly is springing back. Because global warming speeds up the melting of these glaciers, the mountains are rebounding faster.

Speedier Satellites

An artist's impression of a GPS satellite.

An artist's impression of a GPS satellite. (Image credit: NASA)

A primary cause of a warmer planet's carbon dioxide emissions is having effects that reach into space with a bizarre twist. Air in the atmosphere's outermost layer is very thin, but air molecules still create drag that slows down satellites, requiring engineers to periodically boost them back into their proper orbits. But the amount of carbon dioxide up there is increasing. And while carbon dioxide molecules in the lower atmosphere release energy as heat when they collide, thereby warming the air, the sparser molecules in the upper atmosphere collide less frequently and tend to radiate their energy away, cooling the air around them. With more carbon dioxide up there, more cooling occurs, causing the air to settle. So the atmosphere is less dense and creates less drag.

Survival of the Fittest

spring landscape

The vernal equinox occurs on March 20, 2011. (Image credit: © Tatiana Morozova |

As global warming brings an earlier start to spring, the early bird might not just get the worm. It might also get its genes passed on to the next generation. Because plants bloom earlier in the year, animals that wait until their usual time to migrate might miss out on all the food. Those who can reset their internal clocks and set out earlier stand a better chance at having offspring that survive and thus pass on their genetic information, thereby ultimately changing the genetic profile of their entire population.

The Big Thaw

Arctic ice floes

The Arctic takes on a gothic feel as fog rises from melting ice floes in the Laptev Sea. This photo was taken during a 2009 research expedition to Samoylov Island in northern Siberia. There, researchers with the Alfred Wegener Institute for Polar and Marine Research are more interested in land than sea: They're investigating the permafrost of the northern Arctic to better understand how climate change could affect the tundra ecosystem. — Stephanie Pappas (Image credit: Alfred Wegener Institute for Polar and Marine Research)

Not only is the planet's rising temperature melting massive glaciers, but it also seems to be thawing out the layer of permanently frozen soil below the ground's surface. This thawing causes the ground to shrink and occurs unevenly, so it could lead to sinkholes and damage to structures such as railroad tracks, highways and houses. The destabilizing effects of melting permafrost at high altitudes, for example on mountains, could even cause rockslides and mudslides. Recent discoveries reveal the possibility of long-dormant diseases like smallpox could re-emerge as the ancient dead, their corpses thawing along with the tundra, get discovered by modern man.

Pulling the Plug

Ice lake or supraglacial lake. Surface melt water can pond on the surface of the glacier forming large lakes that can drain catastrophically. Belcher Glacier, Devon Island, Nunavut, Canada.

Ice lake or supraglacial lake. Surface melt water can pond on the surface of the glacier forming large lakes that can drain catastrophically. Belcher Glacier, Devon Island, Nunavut, Canada. (Image credit: Angus Duncan)

A whopping 125 lakes in the Arctic have disappeared in the past few decades, backing up the idea that global warming is working fiendishly fast nearest Earth's poles. Research into the whereabouts of the missing water points to the probability that permafrost underneath the lakes thawed out. When this normally permanently-frozen ground thaws, the water in the lakes can seep through the soil, draining the lake, one researcher likened it to pulling the plug out of the bathtub. When the lakes disappear, the ecosystems they support also lose their home.

Arctic in Bloom

A phytoplankton bloom seen in the Barents Sea in mid-August, 2009.

A phytoplankton bloom seen in the Barents Sea in mid-August, 2009. (Image credit: NASA image by Norman Kuring, GSFC Ocean Color Team)

While melting ice in the Arctic might cause problems for plants and animals at lower latitudes, it's creating a downright sunny situation for Arctic biota. Arctic plants usually remain trapped in ice for most of the year. Nowadays, when the ice melts earlier in the spring, the plants seem to be eager to start growing. Research has found higher levels a certain type of the pigment chlorophyll (telltale sign of photosynthesis) in modern soils than in ancient soils, showing a biological boom in the Arctic in recent decades. [Arctic Phytoplankton Blooms Earlier]

Heading for the Hills

polar bears swimming

The rapid loss of sea ice is forcing polar bears to go for longer swims, according to research. (Image credit: Paul Nicklen | National Geographic Stock | World Wildlife Fund)

Starting in the early 1900s, we've all had to look to slightly higher ground to spot our favorite chipmunks, mice and squirrels. Researchers have found that many of these animals have moved to greater elevations, possibly due to changes in their habitat caused by global warming. Similar changes to habitats are also threatening Arctic species like polar bears, as the sea ice they dwell on gradually melts away. [See images of swimming polar bears]

Aggravated Allergies

Antihistamines can help, but there is a lot of disagreement on this and other remedies. One thing really helps: Wash your hands a lot so you don't get a cold in the first place. Image

Antihistamines can help, but there is a lot of disagreement on this and other remedies. One thing really helps: Wash your hands a lot so you don't get a cold in the first place. Image (Image credit: Dreamstime)

Have those sneeze attacks and itchy eyes that plague you every spring worsened in recent years? If so, global warming may be partly to blame. Over the past few decades, more and more Americans have started suffering from seasonal allergies and asthma. Though lifestyle changes and pollution ultimately leave people more vulnerable to the airborne allergens they breathe in, research has shown that the higher carbon dioxide levels and warmer temperatures associated with global warming are also playing a role by prodding plants to bloom earlier and produce more pollen. With more allergens produced earlier, allergy season can last longer. Get those tissues ready.

Live Science Staff
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