Copyright 2002-2005 Vocero Latino LLC. All rights reserved.
Estrategia en la Casa Blanca
Si la economía mejora (cosa improbable), Obama se llevará los laureles. Si no, bastará con echar la culpa a los republicanos por demorar o negar su colaboración.
Alberto Acereda
Current world population (estimated): .
This free script provided by
JavaScript Kit
CLEVELAND FEATURED STORIES
The controversial bill would have allowed businesses to take millions of gallons of water from Lake Erie.
The suspected serial killer said he took it upon himself to punish women for their drug addictions.
UPDATED: Josh Tomlin didn't have his best start Friday night against the Orioles. What he did have was plenty of offense and a good bullpen to help him win his ...
NATIONAL
Democrats Faking Debt Ceiling Crisis in Order to Continue Irresponsible Spending
By Rachel Alexander
Taking the Pulse of Daily Life
On a recent trip to the Kennedy Space Center I had the opportunity to converse with many interesting people, including many Europeans. Of course, the predominant topic of discussion was the lamentable final launch of the Atlantis shuttle, especially in the absence of another suitable vehicle to take its place. However, [...]
By Pedro Blas Gonzalez
SCIENCE/CIENCIA
Climate change: How do we know?
By Nasa
This graph, based on the comparison of atmospheric samples contained in ice cores and more recent direct measurements, provides evidence that atmospheric CO2 has increased since the Industrial Revolution. (Source: NOAA)
The Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 7,000 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.
The current warming trend is of particular significance because most of it is very likely human-induced and proceeding at a rate that is unprecedented in the past 1,300 years.1
Earth-orbiting satellites and other technological advances have enabled scientists to see the big picture, collecting many different types of information about our planet and its climate on a global scale. Studying these climate data collected over many years reveal the signals of a changing climate.
Certain facts about Earth's climate are not in dispute:
The heat-trapping nature of carbon dioxide and other gases was demonstrated in the mid-19th century.2 Their ability to affect the transfer of infrared energy through the atmosphere is the scientific basis of many JPL-designed instruments, such as AIRS. Increased levels of greenhouse gases must cause the Earth to warm in response.
Ice cores drawn from Greenland, Antarctica, and tropical mountain glaciers show that the Earth’s climate responds to changes in solar output, in the Earth’s orbit, and in greenhouse gas levels. They also show that in the past, large changes in climate have happened very quickly, geologically-speaking: in tens of years, not in millions or even thousands.3