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Show Page C6 THE DAILY HERALD, Provo, Huh. Tueday. Ociober 6, lW8 Beating the Phoenix heat requires adjusting sleep schedules By MALIA Rl'LON PHOENIX The morning sun is just beginning to make an appearance as Stephen Happel gets in his morning jog. Not ordinarily a morning person, Happel had to adjust his exercise schedule to Arizona's blistering summers after moving from North Carolina. He isn't the only one. Across the Phoenix area on summer days, especially on weekends, people are walking, biking, mowing and pruning before the morning paper arrives, completing tasks that could prompt heat stroke later in the day. It's a widespread circadian shift that's attracted attention from researchers. "It seems to me the East Coast has a later lifestyle. Here, people are up and doing things earlier," Happel said. "I suppose in some ways, I've adjusted to it." Here in the land of the desert sun, folks are out walking the malls before stores open, jogging streets that will sizzle only a few hours later, golfing in the twilight hours of early morning and working on construction sites heat of the day." Researchers who study recreation and leisure activi- 'it The Associated Press they'll seems to me the East Coast has a later lifestyle. Here, people are up and doing things earlier. I suppose in some ways, I've adjusted to it." ties agree. Professor Wendy Hultsman from Arizona State University-Wes- t said the heat Stephen Happel combined with the fact that Arizona has longer days workers. The store opens at 6 because it doesn't go on dayvacate by noon. to Many say it's only natural a.m. during the rest of the light savings pushes people earlier. get up to switch to an earlier schedyear. "People want to get their ule. "In California, what busiexercise and their normal durwould "The sun rises earlier ness open that early?" in no matter what, so activity I said. she so the wake up summer, ing they're going to do it in the In Arizona, many do. earlier," said Lucinda Nowicz, Golf courses tee off as early most comfortable conditions a longtime Arizona resident. possible," Hultsman said. "In For others, it's a matter of as 5:15 a.m. during the sumArizona they get it done earlimer months to take advantage necessity. for the er temperature." cool mornof and "I had to adjust because it longer days Indiana University recrewas too hot," said Tina Beyers, ings. The Phoenix Zoo, the who moved to Lake Havasu Desert Botanical Garden in ation and leisure researcher Hawkins Barbara said City from California 11 years Phoenix and Arizona-SonorIndiana residents do Desert Museum near Tucson although ago. She said she and her famtend to wake up earlier during ily quickly learned the only all open one to two hours earthe summer because Indiana is lier the to summer. survive the summers during way also isn't on daylight savings, the like to become a morning person. Hiking groups and the the difference in sleep patClub "In California you can go Sierra out whenever you want to," Pathfinders Hiking Club also terns isn't as noticeable she said. "Here you have to adjust their schedules during because Midwestern heat isn't time it. If you go out during the summer months, often as intense. "Arizona has more extreme midday, you're gonna die." meeting a couple hours earlier or the sets. sun after now said she's used heat, longer days and a clock Beyers "You definitely have to that has not been advanced, so to waking up early. The convenience store where she works adjust to the climate," said what you have is business opens at 5 a.m. during the hike leader Ted Gartner. "No activities and personal activito earsummer to accommodate one can be at that level of ties that get early-risinconstruction physical exertion during the lier hours," Hawkins said. v : - a g MICHAEL CHOW Arizona Republic Heating up: The sun sets over the tomb of former Arizona Gov. George G.P Hunt recently in Phoenix, Ariz. Scientists say cities without enough trees and other greenery contribute to rising temperatures in urban areas. New measurement tools show Yellowstone volcano bulging YELLOWSTONE NATIONNew AL PARK, Wyo. (AP) measuring tools indicate the volcano that "It's surprising to underlies National Park is bulging again, pushing the park upward at the rate of 2 racecentimeters a year track speed in geologic terms. The radar measurements and a precise ground survey recorded the rise in the main caldera between 1995 and 1996. The ground survey, conducted this fall, also found some parts of the park surging Yellowstone much more. LeHardy Rapids on the Yellowstone River has risen about 22 millimeters since the last ground survey in 1995. And Mount Washburn, just north of the volcanic caldera, has risen 30 millimeters. Scientists say the mountain's rise must have occurred almost entirely within the last year, because satellite images as recently as 1997 detected no change in its elevation. The renewed uplift does not mean Yellowstone's volcanic underpinnings are closer to eruption. But it does suggest that pressure is again building in the volcanic system, which also drives the park's geysers, said Daniel U.S. of Dzurisin the Geological Survey. The exact cause is debated. Some geologists suggest reservoirs get plugged mineral by deposits, increasing pressure. Others believe deep masses of molten rock called magma swell upwards, causing the bulge. It may also be a combination of both factors. The slight swelling won't disturb visitors, and it probably won't upset any geyser schedules, but it tells geologists that the volcano those tourists wander across is sleeping only restlessly. And it reveals on a small scale the kind of geological huffing and puffing that scientists believe have raised and lowered parts of Yellowstone as much as 100 feet. "It's surprising to me that we're seeing these changes within a matter of a few years," said USGS geologist hot-wat- Just what hefty me that we're seeing these changes within a matter of a few balances deserve. years." Kenneth Pierce, USGS geologist Kenneth Pierce, who has studied the of sediments Yellowstone Lake for evidence of the caldera's rise and fall. "This is a much shorter cycle about 10 years than many of us had talked about." Scientists had recorded a slow of the sinking Yellowstone caldera over the decade before the latest rise. And from 1923 to 1976, geologists recorded a slow rise. The new rise is the first time geologists have documented a full cycle rising, falling, and then rising again. Dzurisin and USGS geologists Charles Wicks and Wayne Thatcher discovered Yellowstone's resumed rise with a new technique called radar The technique relies on radar images of the Earth's surface collected by specialized European satellites. Geologists had previously monitored Yellowstone's rise and fall with leveling surveys that measured the elevations of permanent benchmarks in the park. Between the first survey in Yellowstone in 1923 and the next one in 1976, the caldera rose more than 70 centimeters more than 2 feet although researchers note there could have been ups and downs in the interim. More regular surveys in later years showed a continued rise of about 2 centimeters per year until 1985, when the uplift stopped. By 1986 the caldera had started sinking, which continued until the 0o remote-sensing inter-ferometr- satellites interest rates. 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