(Translated by https://www.hiragana.jp/)
Greenland Melt May Swamp LA, Other Cities, Study Says

COLLECTED BY

Organization: Internet Archive

The Internet Archive discovers and captures web pages through many different web crawls. At any given time several distinct crawls are running, some for months, and some every day or longer. View the web archive through the Wayback Machine.

Collection: Wide Crawl started March 2011

Web wide crawl with initial seedlist and crawler configuration from March 2011. This uses the new HQ software for distributed crawling by Kenji Nagahashi.

What?s in the data set:

Crawl start date: 09 March, 2011
Crawl end date: 23 December, 2011
Number of captures: 2,713,676,341
Number of unique URLs: 2,273,840,159
Number of hosts: 29,032,069

The seed list for this crawl was a list of Alexa?s top 1 million web sites, retrieved close to the crawl start date. We used Heritrix (3.1.1-SNAPSHOT) crawler software and respected robots.txt directives. The scope of the crawl was not limited except for a few manually excluded sites.

However this was a somewhat experimental crawl for us, as we were using newly minted software to feed URLs to the crawlers, and we know there were some operational issues with it. For example, in many cases we may not have crawled all of the embedded and linked objects in a page since the URLs for these resources were added into queues that quickly grew bigger than the intended size of the crawl (and therefore we never got to them). We also included repeated crawls of some Argentinian government sites, so looking at results by country will be somewhat skewed.

We have made many changes to how we do these wide crawls since this particular example, but we wanted to make the data available ?warts and all? for people to experiment with. We have also done some further analysis of the content.

If you would like access to this set of crawl data, please contact us at info at archive dot org and let us know who you are and what you?re hoping to do with it. We may not be able to say ?yes? to all requests, since we?re just figuring out whether this is a good idea, but everyone will be considered.

TIMESTAMPS

The Wayback Machine - https://web.archive.org/web/20110510010100/http://news.nationalgeographic.com/news/2004/04/0408_040408_greenlandicemelt.html

National Geographic News, Reporting Your World Daily

Thursday, October 28, 2010

Greenland Melt May Swamp LA, Other Cities, Study Says

Stefan Lovgren
for National Geographic News

April 8, 2004

Greenland's massive ice sheet could begin to melt this century and may disappear completely within the next thousand years if global warming continues at its present rate.

According to a new climate change study, the melting of Greenland's ice sheet would raise the oceans by seven meters (23 feet), threatening to submerge cities located at sea level, from London to Los Angeles.

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What's This?

Even a partial melting of the ice sheet could have catastrophic consequences for low-lying countries like Bangladesh and the Maldives.

"A one-meter [three-foot] sea level rise would submerge a substantial amount of Bangladesh," Jonathan Gregory, the study's lead author and a climate scientist at the University of Reading in England, said in a telephone interview.

Scientists have previously calculated that if the annual average temperature in Greenland increases by almost 3° Celsius (5.4° Fahrenheit), its ice sheet will begin to melt.

Many experts believe the concentration of carbon dioxide in the atmosphere will have reached levels around the year 2100 that would cause the temperature to rise that much.

"We're not saying how long it will take to get to the three degrees or how long it will take to lose the ice sheet," Gregory said. "We're saying there's a high likelihood of passing this threshold of viability with the carbon dioxide levels that are currently being considered."

The research is described in this week's issue of the science journal Nature.

Global Warming

The issue of global warming is controversial. It's clear that, since the Industrial Revolution, atmospheric concentrations of carbon dioxide have increased 30 percent, enhancing the heat-trapping capability of the atmosphere.

Scientists generally believe that the combustion of fossil fuels to run cars, heat homes, and power factories is the primary source for this increase in carbon dioxide levels.

In the absence of emissions control policies, the United States Environmental Protection Agency says carbon dioxide concentrations will be 30 to 150 percent higher than the current 370 parts per million (ppm) found today.

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