By Dana Desonie
Although weather switch is general in Earth's historical past, worldwide warming has raised regular temperatures to their maximum in millennia, leading to melting ice caps, shorter winters, alterations within the seasonal behaviors of animals, and extra severe climate. And even though greenhouse gases are crucial for preserving the planet's temperatures cozy, fossil gasoline burning and different human actions are expanding greenhouse gasoline degrees and inflicting temperatures to upward push. whereas a decade in the past many scientists have been skeptical that human actions may perhaps impression the weather method, their versions now convey that basically human actions can account for the value of alterations being visible. "Climate" is a well timed new publication that discusses the problem of world warming and what we will be able to do to avoid its upward thrust. hugely visible and written in a transparent, available demeanour, this ebook adresses how humans needs to use power extra successfully, strengthen replacement strength assets, and reduce emissions applied sciences.
Read Online or Download Climate: Causes and Effects of Climate Change (Our Fragile Planet) PDF
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Extra info for Climate: Causes and Effects of Climate Change (Our Fragile Planet)
Example text
ENSO oscillations have a cycle of about 3 to 8 years and are directly related to the interactions between the ocean and atmosphere. ENSO is the foremost source of multiyear variability in weather and climate around the world. Natural Causes of Climate Change ENSO impacts the South Pacific gyre. In a normal year, the cold Peru Current travels northward up South America. The cold, dense current allows nutrient-rich deep ocean water to rise to the surface, causing plants and animals to thrive. This current travels north to the equator, where the trade winds then push it westward.
The cold, dense current allows nutrient-rich deep ocean water to rise to the surface, causing plants and animals to thrive. This current travels north to the equator, where the trade winds then push it westward. The equatorial Sun warms the current as it goes. After reaching the western Pacific, most of the water moves north, south, or even back across the equato- rial region as a subsurface countercurrent. But some of the water piles up in the western Pacific and continues to warm. The trade winds move from east to west across the equator because the cold water in the east- ern equatorial Pacific cools the air above it and creates a low-pressure cell, and the warm water in the western Pacific warms the air above it and creates a high-pressure cell.
Because heavy water is more likely to precipitate near the equator, snow that falls in the high latitudes is light. During an ice age, this light snow is trapped in ice sheets, and therefore seawater is enriched in 18O. The 18O/16O value of seawater is therefore directly related to the amount of 16O-enriched ice that covers the Earth. 01% indicates a 33 foot (10 m) change in sea level. Sedimentary Rock Sedimentary rock does not give as detailed a picture of past climate as ice cores and marine or lake sediments.
