Hurricans - Mean Season
Hurricane’s are an environmental disaster. People in hurricane-prone
regions most want to know: when and where the next hurricane will make
landfall and just how powerful the storms will be when they do hit. For the
most accurate warning possible, people rely on the meteorologists. Still a
few tenacious problems remain, like that forecasters cannot always predict
weather nor how much a hurricane will intensify before it hits land. That’s a
problem for people in the path of a storm who need to know if it’s enough
just to nail plywood across the windows, or if they should leave town
altogether. The need for better hurricane forecasting will become more
urgent now as well as in the future to come. It will not take more than a
handful of major hurricanes striking land on the crowded and densely
developed U.S. East Coast to cause damage in the ten’s of billions of
dollars. Forecasters rely on trends in the global climate that coincide with
the ups and downs of Atlantic hurricane activity.
One “predictor, the warming of the equatorial Pacific, disrupts
weather across much of the globe. Shifts in air circulation disrupt the
vertical circulation in Tropical storms, which prevent them from growing
into hurricane’s. Scientists are sure that Atlantic hurricanes assemble over
Africa. The collision of hot, dry air over the Sahara Desert, including warm,
moist air from the equatorial jungle will give birth. The collision will cause
disturbances in the atmosphere called “Hurricane Seedlings. Each season
there is about 60 seedlings blown west into the Tropical Atlantic by the
trade winds. At first, Seedlings are nothing more than clusters of
thunderstorms, but in an average year, nine will evolve into named tropical
storms and about six become hurricane’s.
On their way across the ocean, seedlings feed on the heat in warm
surface water. Pressure in the center of a disturbance falls as the air inside it
grows warmer and lighter. The hurricane then gains spin due to the earth’s
rotation. Due to earth’s gravity pull, storms revolve counterclockwise in the
Northern Hemisphere. When the disturbance closes in on itself and becomes
a discrete, rotating storm, it's classified as a Tropical Depression. When
winds reach up to 40mph it becomes a tropical storm. At that point it's given
a name by the size and strength of the storm. When winds reach 74mph, it
then becomes a hurricane.
The rule of evaporation, condensation, and transportation of heat is
very important to understand a hurricane. A hurricane’s strength then
recorded and annualized to calibrated on the Suffix Simpson intensity scale.
The system takes into account central storm pressure, maximum winds and
potential for storm surge. A storm surge produces the wall of water
hurricanes bulldoze ahead of them selves. Category one, type of storm
having sustained winds of 74-95mph that usually do only minor damage.
Categories three-five hurricanes can have catastrophic effects. For example,
the surge from just one of category fours many storms drowned some 6,000
people in Galveston TX. in 1990. Dramatic changes in hurricane intensity
occur when storms undergo a process called rapid deepening. Rapid
deepening is a sudden pressure drop in the storm. This speeds up the
circulation in the eye-wall. Rapid deepening can transform categories' one
or two storms into categories' four or five storms in just two days. It's not
entirely clear how this takes place.
Hurricane’s take the lives of thousands of people every day! There is
no way of warning people in enough time to clear the path of a major storm.
WE CAN ONLY HOPE.