Arizona Republic from Phoenix, Arizona • Page 7

Friday, January 9, 1998 The Arizona Republic A7 an's hand seen in global warming GLOBAL TEMPERATURE B1SII10 Every year scientists collect surface temperatures from around the world to create a global temperature index. Since 1900, the index has risen almost ldegree, making 1997 the wannest year of the century. 1F 1 Degrees above and below the global normal, 61. 7F change, ocean circulation and even volcanoes. But, he added, "the odds that we would be wrong, that there is no relation to human activity, is in the area of 5 to 10 percent." The rising temperatures have occurred worldwide, Karl said, though the impact has been less in eastern North America, China and eastern parts of the Mediterranean.

This may be the result of sulfuric air pollution in those areas, he commented, with the hazy air reflecting sunlight and producing a local cooling effect much like that of the cloud generated when the Mount Piiatubo volcano erupted in the Philippines. That eruption shot sulfuric gases into the upper atmosphere, producing a brief worldwide cooling. As far as the possible effects of, global warming are concerned, Friday noted there have been reports of softening of the permafrost in Alaska month in Kyoto, Japan, where government officials from around the world sought ways to reduce the potential impact of climate change. Many scientists believe that carbon dioxide and other gases released into the atmosphere by industrial activities are increasing the Earth's temperature by trapping heat from the sun, somewhat like a greenhouse. Others disagree, and previously National Oceanic and Atmospheric Administration officials simply reported their findings without speculating on the cause of rising temperatures.

"We feel more comfortable now in saying there is a human effect because we have more data than before," said Friday, assistant administrator for oceanic and atmospheric research. "The trend of global temperatures is never due to a single source," commented Karl, noting that factors can include periodic cycles of climate researcher. "The increasing trend of temperatures that we see, we believe, is at least partially attributed to human activities," such as pollution from cars and factories. President Clinton, speaking at a political ifiind-raiser in New. York, responded promptly to the report "We need a national consensus to do something on global warming," Clinton said.

"It is significant and what we need is an understanding that we can grow- the economy and still preserve the environment" Karl said the Earth's average temperature last year was three-quarters of a degree Fahrenheit above normal. Normal is 61.7 degrees, the average for the years 1961-1990. The 1997 reading tops the previous warmest year, 1990, by 0.15 of a degree. Global warming has been a topic of sharp debate in recent years, culminating in the climate conference last Clinton calls for consensus on U.S. action By Randolph Schmid Associated Press WASHINGTON Last year was the warmest on record for Earth, and for the first time federal climate researchers are willing to say people are at least partly to blame.

"I wouldn't have been willing to say this two years ago. 1 believe we are seeing evidence of global warming at least some of which is attributable to human activities," said Elbert W. Friday, research chief of the National Oceanic and Atmospheric Administration. "Indeed, 1997 was the warmest year on record," added Tom Karl, a senior -1F 1950 1997 1900, Climate I Sea level Even 1 degree can have a dramatic impact on: Rainfall Source: National Climatic Data Center produce "a lot of surprises," including changes in rain and snowfall patterns, though not necessarily a disaster. and a 6-inch rise in overall ocean levels over the past century.

Karl said continued warming could Enzo Angiolini Nine West v. it A)- A Bandolino Aigner am 1 i Calico Mia Liz Claiborne '4 Jennifer Moore a1iiMfllffliMliiMMI And many others -) 'A I'- i "I i Leather handbags Ours exclusively. Slings, double-handles, buckets and more in black or brown. Reg. sale Entire stock of handbags minibags Ours exclusively.

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