Climate changes

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Dirt: The Erosion of Civilizations David R. Montgomery See book keywords and concepts

The deepest layers of valley-hlling sediments date from glacial to interglacial climate changes during the past quarter million years. Higher layers in the stack of dirt tell of more recent episodes of hillslope erosion as well as intervening periods when soils developed. The first postglacial Figure 7. Parthenon. Albumen print by William James Stillman, 1869 (courtesy of Research Library, the Getty Research Institute, Los Angeles, California [92.R.84]). deposits of reworked hillslope soils in the valleys genetally date from the Bronze Age arrival of agriculture.

Six Degrees: Our Future on a Hotter Planet Mark Lynas See book keywords and concepts

Surprisingly, the Amazon forest ecosystem turns out to have been remarkably resilient to past climate changes. Even during the chilly depths of the last ice age, the forest persisted relatively undisturbed, despite cooler temperatures and lower rainfall. The real problem for the Amazon, it turns out, is heat. In order to estimate the resilience of the Amazon to changes in climate, a joint UK Met Office/University College London team led by Sharon Cowling constructed a computer model which successfully managed to simulate rainforest changes during previous climatically cooler periods.

Using the UK Hadley Centre's model for climate changes in the region by 2020, the scientific team concluded that up to a third of protea species would become threatened or endangered, whilst four would become completely extinct. In North America too, one degree of climate change could push a threatened species over the brink to extinction - and this one is cute and furry. According to WWF, pikas - small, hamsterlike creatures with rounded ears and bushy whiskers - are the first mammal to be endangered by climate change.

This may indeed, as suggested earlier, be the fastest large-scale climate warming the world has ever experienced - faster even than climate changes which caused catastrophic mass extinctions, as the following chapter will show. Particularly deceptive may be the impression that the PETM hot spell was well watered, with heavy monsoon rains quenching the thirst of places which are now semi-arid. In fact the first plant migrants to arrive in Wyoming were small-leaved and drought-tolerant, suggesting that the PETM began dry as well as hot.

Survival of the Sickest: A Medical Maverick Discovers Why We Need Disease Dr. Sharon Moalem See book keywords and concepts

The savanna theory holds that our apelike ancestors abandoned the dark African forests and moved into the great grassy plains, perhaps because of climate changes that led to massive environmental change. In the forest, food was plentiful—fruits, nuts, and leaves could be found in abundance. But out in the savanna, life was tougher, so the theory goes, and our ancestors had to find new ways to get food. Males began to hunt bravely for meat among the herds of grazing animals.

And because everyone was certain that global climate changes took at least a thousand years, nobody even bothered to look at the evidence in a way that could reveal faster change. Those Swedish scientists studying the layers of lake bottom clay who first postulated the "rapid" thousand-year onset of the Younger Dryas? They were looking at chunks of mud spanning centuries; they never looked at samples small enough to demonstrate faster change.

In fact, there have been around a score of these abrupt climate changes over the last 110,000 years; the only truly stable period has been the last 11,000 years or so. Turns out, the present isn't the key to the past—it's the exception. The most likely suspect for the onset of the Younger Dryas and the sudden return to ice age temperatures across Europe is the breakdown of the ocean "conveyor belt," or thermohaline circulation, in the Atlantic Ocean.

By the 1970s there was general agreement that the temperature shifts and climate changes leading into and out of ice ages could occur over mere hundreds of years. Thousands were out, hundreds were in. Centuries were the new rapid. There was a new consensus around when—but a total lack of agreement about how. Perhaps methane bubbled up from tundra bogs and trapped the heat of the sun. Perhaps ice sheets broke off from the Antarctic and cooled the oceans.

Adaptogens: Herbs for Strength, Stamina, and Stress Relief David Winston, RH(AHG), and Steven Maimes See book keywords and concepts

For example, the homeostatic process can adjust internal body temperature in response to climate changes that come with the changing seasons. However, allostasis is the term used to describe the condition of the body (under stress) when it's exposed to unexpected events such as a sudden drop in temperature or prolonged severe temperatures. In this case, the body must react, adapt, and regain homeostasis to survive. Biology of Allostasis There are many examples of the body adapting to achieve allostasis, which is stability through change.

Dirt: The Erosion of Civilizations David R. Montgomery See book keywords and concepts

Perhaps the abrupt climate changes of the Younger Dryas pushed semisettled people with declining resource bases into agricultural experimentation. Once the climate improved, groups adapted to growing grains had an advantage. Increasing reliance on domesticated crops spread across the tegion. The Natufian culture that flourished along the Mediterranean coast in modern Israel, Lebanon, and Syria from 9000 until 7500 bc was based on harvesting wild grain and herding goats and gazelles.

Safe Trip to Eden: Ten Steps to Save Planet Earth from the Global Warming Meltdown David Steinman See book keywords and concepts

Until a decade ago it was generally thought that all large-scale global and regional climate changes occurred gradually over many centuries or millennia, scarcely perceptible during a human lifetime, say Jonathan Adams, Mark Maslin, and Ellen Thomas in the journal Progress in Physical Geography? The tendency of climate to change relatively suddenly?within decades or even a few years—has been one of the most surprising outcomes of the study of earth history, specifically the last 150,000 years, said a 1993 article in Nature.

Dirt: The Erosion of Civilizations David R. Montgomery See book keywords and concepts

Regional climate changes cannot explain the boom-and-bust pattern of human occupation in ancient Greece because the timing of land settlement and soil erosion differed around the region. Instead, modern geoarchaeo-logical surveys show that soil erosion episodically disrupted local cultures, forced settlements to relocate, led to changes in agricultural practices, and caused periodic abandonment of entire areas. An ancient geopolitical curiosity provides further evidence that people destroyed Greek soils. The northern slopes of Mount Parness define the border between Boeotia and Attica.

Timeless Secrets of Health & Rejuvenation: Unleash The Natural Healing Power That Lies Dormant Within You Andreas Moritz See book keywords and concepts

Since all external influences, such as solar storms, climate changes and the moon's passage through a particular zodiac, represent different energy states, they can instantly trigger corresponding activities, responses and transformations within your body. As a result of receiving these outer stimulations, your body sends subtle signals or intuitive messages to tell you that its requirements for such necessities as food, water, rest, exercise, warmth and coolness have changed. However, this requires sensitivity and wakefulness on your part.

Dirt: The Erosion of Civilizations David R. Montgomery See book keywords and concepts

Despite the occasional mass extinction, life and soils symbiotically grew and diversified through climate changes and shifting arrangements of continents. As soil completes the cycle of life by decomposing and recycling organic matter and regenerating the capacity to support plants, it serves as a filter that cleanses and converts dead stuff into nutrients that feed new life. Soil is the interface between the rock that makes up our planet and the plants and animals that live off sunlight and nutrients leached out of rocks.

Although historians are prone to credit the end of civilizations to discrete events like climate changes, wars, or natural disasters, the effects of soil erosion on ancient societies were profound. Go look for yourself; the story is out there in the dirt. TWO Skin of the Earth We know more about the movement of celestial bodies than about the soil underfoot. LEONARDO DA VINCI Charles darwin's last and least-known book was not particularly controversial. Published a year before he died in 1882, it focused on how earthworms transform dirt and rotting leaves into soil.

The Healing Power of Rainforest Herbs: A Guide to Understanding and Using Herbal Medicinals Leslie Taylor, ND See book keywords and concepts

The coumarin content in guaco (and any plant) can change and fluctuate due to where it was grown, how and when it was harvested, climate changes in the growing environment/season, and other natural phenomena. The coumarin content can be 10 percent in one harvest of guaco plants, and as low as 5 percent the following year, even when the same plants are harvested again only a year later. So, in this case, it just would not be a good idea to try to replace the drug with an herbal supplement.

How to end cruelty to people, animals and nature, and create a world without war and environmental destruction Mike Adams, the Health Ranger See article keywords and concepts

But within a few short years, humanity would be wiped out due to climate changes and the devastation of the food supply. And a few short years after that, nature would return in full force, with far greater health and biodiversity without mankind. The wildlife, rivers and streams would, in time, return to their pristine, original state, and life in the oceans would again become abundant. All without man. I only hope that our civilization can find ways to put an end to this cruelty without having to be wiped out by nature. I hope that we can find a way to live in balance with nature.

Outsmart Your Cancer: Alternative Non-Toxic Treatments That Work Tanya Harter Pierce See book keywords and concepts

Evaporation, erosion of land into the water, and climate changes causing large portions of water to be frozen into polar ice caps, have all contributed to the oceans of today being saltier than they used to be when single-celled organisms were evolving. But the original "inner ocean" that multicellular organisms developed is still a part of our physiology today, and still allows each individual cell to gain its nourishment from and excrete its wastes into the fluid around it. It is called the "extracellular fluid" of our bodies. Our cells depend on it to survive.

101 Things You Don't Know About Science And No One Else Does Either James Trefil See book keywords and concepts

Further studies of the Greenland ice cores and the fossil record in the Atlantic will show whether this particular theory, or some variation on it, explains the observed rapid climate changes in the earth's past. The bottom line, though, is that our planet has a much more violently variable past than we have believed, and the fact that the climate has been more or less stable for the last 8,000 years is no guarantee that it will remain so in the future.

Earth Right H. Patricia Hynes See book keywords and concepts

One participant at the October 1989 EPA conference on chlorofluorocarbon and halon substitutes raised the question of substitutes causing other climate changes, such as acid rain. The substitution of one set of industrial chemicals that destroy the ozone layer for another set of chemicals that are toxic to humans or potentially harmful to climate is myopic. We want alternatives that are safe. WHAT YOU CAN DO /. Put the Pressure on Industry. In the United States, five companies manufacture CFCs and three companies make halons.

The experts who testified before the congressional subcommittees concluded that, although we do not have in hand the precise connections between global warming and possible climate changes, the major issue is not whether global warming will cause climate and ecological disasters, but how quickly they will occur. Without a precise picture of the net effects of these physical and biochemical interactions in nature, many scientists agree that the multitude of small changes in nature caused by incremental global warming may have powerful effects. We must take immediate action with what we know.

Because of feedback mechanisms, climate changes may happen with a rapidity that leaves agronomic advances trailing. WHAT CAN BE DONE?_ Agriculture is only one of many planetary systems that are endangered by global warming. In itself, this vital sector warrants immediate action. The Environmental Defense Fund and the Natural Resources Defense Council recommend three crucial initiatives that should be taken to help protect U.S. agriculture from dislocation that could come with a warming trend.

They advise that newly established forests contain tree species at the northern edges of their ranges to enable trees to adjust to climate changes: white oak in Minnesota, for example, bald cypress in southern Illinois, longleaf pine in North Carolina, and black mangrove in Florida. Most of us do not farm—and can only support the Conservation Reserve Program. But as Chapter 17 demonstrates, many of us can influence, through direct and indirect means, the trend in deforestation worldwide. We can avoid buying the exotic woods taken from rainforests.

101 Things You Don't Know About Science And No One Else Does Either James Trefil See book keywords and concepts

In one of those examples of serendipity that occur now and then in the history of science, information on these sudden climate changes has caused theorists to link the new data with some old (and rather puzzling) data obtained from cores drilled into the north Atlantic sea floor. These data seemed to indicate that every 7,000 to 12,000 years, a layer of continental rocks was being dumped in the middle of the Atlantic Ocean.

Food Revolution: How your diet can help save your life and our world John Robbins See book keywords and concepts

Yet as Bill McKibben, author of the environmental bestseller about global warming, The End of Nature, points out, "Climate changes all the time, but it changes slowlv. We're doing it at an enormous rate of speed. . . . That has real consequences. . . . Natural systems can't adapt to that sort of speed of change. . . . With the ability to change climate, you change everything. You change the flora and the fauna that live at a particular place. You change the rate at which the rain falls and at which the rain evaporates. You change the speed of the wind. You change the very ocean currents. . . .

Nontoxic, Natural and Earthwise Debra Lynn Dadd See book keywords and concepts

The tesults are smog, the thinning of the ozone layet, acid rain, and climate changes, which ultimately affect our own health. Outdoor Air Pollution Air pollution can affect our health by damaging tissues of the respiratory system, by poisoning the blood, and by altering DNA within the cells. It can cause emphysema, bronchitis, asthma, cancer, birth defects, and increased incidence of upper respiratory disease and heart disease; it may also be linked to vatious cancers, childhood retardation, and sudden infant death syndrome.

As for the environment, the burning of fossil fuels for electricity or direct use in our homes, industry, and motor vehicles is the primary cause of the major problems discussed in Chapter 2: smog, acid rain, and climate changes. The production and transportation of fossil fuels also causes a tremendous amount of pollution.

Predicted climate changes could drastically reduce watet availability even further. Agriculture accounts for almost 75 percent of human use of watet worldwide. The real watet guzzler is raising animals, especially cows, for meat. In the United States it takes anywhere from thtee to one hundted gallons of water to produce one setving of most gtain, vegetables, or fruit crops (rice takes about 250 gallons), whereas it takes twenty-six hundted gallons to produce a setving of steak, thirteen hundred gallons for hamburger, and four hundred gallons for chicken or pork.

Infinite Mind: Science of the Human Vibrations of Consciousness Valerie V. Hunt See book keywords and concepts

There are worldwide signs of spiritual awakening perhaps stimulated from the horror of religious wars, famine, and catastrophic climate changes. Contemplative people, dissatisfied with life and work despite economic plenty, have turned to religion, frequently without surcease. Even yuppies who became professionally successful and accumulated an abundance of material possessions, are disillusioned about their futures. More and more, people turn to meditation. For a while, higher states of consciousness seemed like a sufficient reward—now, they are not.

101 Things You Don't Know About Science And No One Else Does Either James Trefil See book keywords and concepts

If the earth's climate changes, we expect it to happen over many thousands of years, so that living things can adapt. The conventional wisdom is that one of the great dangers of greenhouse warming, should it occur, is that average global temperatures would change rapidly and ecosystems would be unable to adjust before species are driven to extinction. While the amount of expected greenhouse warming isn't unprecedented in the earth's history, the speed is. When the earth came out of the last Ice Ages, average global temperatures rose about 5 degrees Celsius.

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