Agriculture
Growing Healthier Tomato Plants
Springing forward
Seeds of the Future
Amphibians
Bullfrogs
Newts
Salamanders
Animals
Lucky Survival for Black Cats
Eyes on the Depths
Stunts for High-Diving Ants
Behavior
Mosquito duets
Calculating crime
Face values
Birds
Quails
Swifts
Crows
Chemistry and Materials
The Taste of Bubbles
Popping to Perfection
Diamond Glow
Computers
Toxic Dirt + Avian Flu = Science Fair Success
Graphene's superstrength
Nonstop Robot
Dinosaurs and Fossils
Dino Flesh from Fossil Bone
Meet your mysterious relative
A Dino King's Ancestor
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Less Mixing Can Affect Lake's Ecosystem
The Rise of Yellowstone
Greener Diet
Environment
An Ocean View's Downside
A Change in Leaf Color
A Newspaper's Hidden Cost
Finding the Past
Little People Cause Big Surprise
Digging Up Stone Age Art
The Puzzle of Ancient Mariners
Fish
Halibut
Sharks
Barracudas
Food and Nutrition
Eat Out, Eat Smart
Packing Fat
Making good, brown fat
GSAT English Rules
Problems with Prepositions
Finding Subjects and Verbs
Capitalization Rules
GSAT Exam Preparation Jamaica
How are students placed after passing the GSAT exam
10 Common Mistakes When Preparing for the GSAT Math Test
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
GSAT Mathematics
GSAT Practice Papers | GSAT Mathematics | Maths
Math Naturals
Detecting True Art
Human Body
From Stem Cell to Any Cell
Sea Kids See Clearly Underwater
Cell Phone Tattlers
Invertebrates
Shrimps
Giant Squid
Daddy Long Legs
Mammals
Boxers
Dolphins
Ponies
Parents
How children learn
Raise a Lifelong Reader by Reading Aloud
Children and Media
Physics
Black Hole Journey
IceCube Science
Powering Ball Lightning
Plants
Pumping Up Poison Ivy
Assembling the Tree of Life
Underwater Jungles
Reptiles
Asp
Gila Monsters
Anacondas
Space and Astronomy
A Puffy Planetary Puzzle
Wrong-way planets do gymnastics
A Galaxy Far, Far, Far Away
Technology and Engineering
Riding Sunlight
Bionic Bacteria
Smart Windows
The Parts of Speech
What is a Preposition?
Countable and Uncountable Nouns
Pronouns
Transportation
Robots on a Rocky Road
Robots on the Road, Again
Where rivers run uphill
Weather
Weekend Weather Really Is Different
Where rivers run uphill
The Best Defense Is a Good Snow Fence
Add your Article

Recipe for a Hurricane

Last August, Charley ripped through Florida. The hurricane tore up trees, wiped out houses, and caused more than $7 billion in damage. At about the same time, a series of typhoons killed at least 40 people in the Philippines and forced more than a million people to flee. Three weeks later, Hurricane Frances followed Charley's lead, again pummeling Florida—to the dismay of many people in the state. Then came Ivan and Jeanne. Hurricane Jeanne killed more than 1,000 people in Haiti, before heading for the Bahamas and Florida. The onslaughts may have been massive, but they weren't a surprise. Every year, major storms cause major problems around the world. There's nothing people can do to stop the powerful forces of nature. But new techniques are helping scientists to predict how, when, and where the big ones will occur. The more accurately scientists can give warnings, the more likely people are to grab their valuables and flee to safety. Predictions are improving. "We've gotten better over the years, especially the last few years," says Phil Klotzback. He's an atmospheric scientist at Colorado State University in Fort Collins. Storm formation There's plenty left to learn, though. Even when scientists can figure out where a storm is headed, winds can change at the last minute, carrying the storm in a new direction. Charley, for example, was originally headed right for the city of Tampa Bay but ended up hitting the Florida coast further south. "A little shift can make a big difference," says meteorologist Eric Blake. He works at the National Hurricane Center in Miami. "Meteorology is both a science and an art." The science part depends mostly on computer simulations, or models, and knowledge of the past. Scientists have been collecting data about storms for decades. They've noticed patterns that suggest what it takes for a strong storm to form in the first place. Hurricanes that hit the United States start when a thunderstorm forms off the coast of Africa. Storms also develop over tropical waters in other parts of the world. Most storms end up falling apart on their own, and we never hear about them. For a hurricane to get organized, "conditions have to be just right," Klotzbach says. First, the ocean water needs to be warm enough so that the winds can take up water through evaporation, which rises into the air. As it rises, the vapor cools and turns back into liquid. This process releases heat. The cycle of evaporation and condensation is like an engine that causes winds to swirl and grow. It drives the formation of a hurricane. If wind speeds inside the swirling mass reach 40 miles per hour, the system is classified as a "tropical storm," and it gets a name. At 75 miles per hour, it becomes a hurricane. In the western Pacific, hurricanes are known as typhoons. On average, 60 or 70 storms form off Africa every year, Klotzbach says. About 10 of them get names. There are usually about six hurricanes. Two tend to be very intense, with winds of 115 miles per hour or higher. Hurricane season lasts from June 1 to Nov. 30. Ninety percent of all hurricanes hit in August, September, and October, Klotzbach says. Half usually happen in September, when conditions are most favorable. Hurricane tracks The National Hurricane Center tracks storms as they happen. Observations and data come from people on ships out at sea and from satellites in orbit around Earth. Computers crunch the data for warning signs of a developing storm. Years of observations have supplied scientists with fairly reliable patterns that help them figure out what's going to In the northern hemisphere, hurricanes spin counterclockwise around a center, called an eye. Tropical trade winds carry these systems across the ocean toward the southeastern United States. When a big one starts to form, meteorologists begin to watch it closely. Some experts even fly into the eye to get a closer look. As the storm approaches land, meteorologists at the Hurricane Center send out advisories every 6 hours. When they get to land, storms often turn north before cruising east again, back out to sea. But with unpredictable changes in temperature and wind patterns, it doesn't always work that way. "Forecasts of the exact track have gotten considerably better over the last 10 years," Blake says. Still, such predictions are good for only a few hours. And storms are constantly full of surprises. "Storms can track in all sorts of strange ways," Klotzbach says. Such quirks keep people glued to their radios and TVs when hurricanes approach land, as they listen for the latest reports on which way a storm is headed. Future storms As if that weren't tricky enough, researchers at Colorado State try to make predictions months ahead of time. Before the start of each hurricane season, they announce how many hurricanes and severe storms they expect will occur in the coming summer and fall. Some years are more active than others. And knowing what to expect is important to lots of people, including emergency managers, insurance companies, and people who live on the coasts. Being prepared can save millions of dollars and lots of lives. To predict the future, the Colorado State researchers use computer models to look to the past. "Basically, we see what global climate features worked well in forecasting previous years," Klotzbach says. "We assume the future is going to be like the past." For instance, when temperatures at the surface of the Atlantic Ocean are warm in late spring and early summer, the hurricane season tends to be very active. In years that have a weather pattern called El Niño, on the other hand, high winds tend to break storms up, and few hurricanes develop. Researchers at Colorado State have used such patterns to make predictions for the last 21 years, Klotzbach says. Their predictions are now a lot better than those they made even a few years ago. Last May, for example, Klotzbach and his team predicted an "above-average" probability of hurricanes hitting the U.S. coast in the coming hurricane season. The researchers said they expected 14 named storms and eight hurricanes. In fact, August had near-record storm activity, and September was also above average. For now, the researchers expect October to be a little quieter than usual. Personality Although there are patterns as to when and where hurricanes occur, every hurricane is different. Each one has its own personality. To acknowledge that variety, every big storm gets its own name. Storms in the Atlantic are named after people. In the Pacific, storms can be named after flowers or take on nicknames. The World Meteorological Organization decides names in advance, and the alphabetical list rotates every 6 years. Names on the list get replaced only if a storm with a particular name is especially severe—killing lots of people or costing loads of money. That way, the name takes its place in history. Teddy. Sally. Emily. Dennis. The names may sound friendly. But, watch out. Hurricanes are like bullies. Even with a name like Debby or Charley, big storms can turn on you when you least expect it. Knowing what to look for can help you get out before it's too late.

Recipe for a Hurricane
Recipe for a Hurricane








Designed and Powered by HBJamaica.com™