C-+chapter+27_Rock+Melon+group

__**WEATHER PATTERS: (CHAPTER 27, Section 3)**__ What are weather patterns? What is the point of learning about Weather Patterns? What is __**OUR**__ benefit to learning Weather Patterns? Well to __#|answer__ these questions, read over the following __#|information__ and look at the pictures.

__**Weather** **Patters**__:

Have you noticed that sometimes the weather will repeat itself several days in a row. An example of this is, let's say in March it is hot, in the 75's-85's every day for the entire month. In April it is warm and rainy all month. Repeat the pattern; May is hot every day, June is warm/rainy every day. This is a perfect example of a Weather Pattern. By viewing a Weather Analysis Map (WAM), Weather Broadcasters can look for weather patterns. Like the example above, Meteorologists can look at a warm front/high pressure system in the months of March and May. In April and June, meteorologists can find cold fronts/low pressure systems.

What things determine a weather pattern? Well, things like Warm Fronts and High Pressure Systems determine that the weather is going to be warm/hot and dry/moist. Cold Fronts and Low Pressure Systems are going to determine that the weather is going to be cool/cold, and wet/humid. How about a High Pressure System and a Stationary Front? The weather will be hot and moist/dry.

The jet stream is a high velocity river of air that flows completely around the Earth at the mid-latitudes. During winter, the jet core is located generally closer to 300 millibars since the air is more cold and dense in the vicinity of the jet stream during the cool season. The 200 chart is used for the jet stream in the warm season but either chart in most instances will suffice. Many hot air balloonists have tried to ride this river of air around the world with not much success for most.
 * Jet Stream:**

Is this confusing? It shouldn't be. If you ever read a weather map like the one below, look at where the area above it has a totally different weather pattern, compared to the area below the jet stream.




 * Millibar:**

A millibar is an unit of atmospheric pressure used by meteorologists equal to one thousandth of a bar. The standard atmospheric pressure at sea level is 1,013 millibars. In aviation and television weather reports, pressure is given in inches of mercury ("Hg), while meteorologists use millibars (mb), the unit of pressure found on weather maps. As an example, consider a "unit area" of 1 square inch. At sea level, the weight of the air above this unit area would (on average) weigh 14.7 pounds! That means pressure applied by this air on the unit area would be 14.7 pounds per square inch. Meteorologists use a metric unit for pressure called a millibar and the average pressure at sea level is 1013.25 millibars.




 * 300mb, 250mb, and 200mb chart:**

these levels are located near the top of the troposphere and in the lower stratosphere; the **//jetstream//** winds and **//jetstreaks//** are found near these levels

Vocabulary Review:

1. Jet stream: //​noun; strong, generally westerly winds concentrated in a relatively narrow and shallow stream in the upper troposphere of the earth.//

Hurricanes

citrus clouds.

Masses

//2. Jet streaks: are discoverd by air piolets from ww2 when//

garrett __chapter 27.2 Global Winds and Ocean Currents__

__the coriolis effect__

to understand this chapter you first must imagine a pilot preparing to fly from New York to Florida. the pilot sets his compass south. the pilot heads in a straight line to Florida. because the pilot is flying in a straight line and the earth rotates in a counterclockwise motion. this cause's the pilot to end up west of his intended destination of Florida. Because of the Earth's rotation it creates a curve that makes it looks like the pilot was heading West instead of South.

the polar cell is one of the three atmsopheric circulations in the nouthern hemisphere the ferrel cell is one of the three atmospheric circulations in the nouthern hemisphere the hadley cell is one of the three atmospheric circulations in the nouthern hemisphere the trade winds is one of the three atmospheric circulations in the southern hemisphere the westerlies is one of the three atmospheric circulations in the southern hemisphere the polar easterlies is one of the three atmospheric circulations in the southern hemisphere

=__Surface Ocean Currents__=

garrett
=__How Surface Ocean Currents Move__=

=
the global winds and the Earth's rotation cause suface ocean currents move in circuler motions called called gyres, whch means circuler movement. the gyres move clockwise in the nouthern hemisphere and counter clockwise in the southern hemisphere. there are to major gyres in total the first one is the kuroshio gyre in the pacific and the other is the atlantic gyre====== these both are surface currents that are created by wind and the rotation of the earth.



self reflection
I found it very intresting how much of are world is effected by the rotation of the earth and how the the rotation of the earth effects the global winds. I also was interested in how the direction of the wind change in the different hemispheres. I found it interesting to read this chapter because I did not know how much the wind and the rotation of the earth effected the climates and the patterns of the oceans.

list of vocabulary
coriolis effect: a bending of air currents due to earth's rotation

trade winds: a surface wind current that flows from 30 latitude to the equator; bends to the right in the northern hemispher and left in the southern hemisphere due to earth's rotation

cold front: occurs when cold air moves in and replaces warm air at earth's surface

warm front: occurs when warm air advances and over takes the cooler air in a region

garrett review of article the articlestarts in saying that we are not equiped to deal with the changing climate and the more freqent natural disasters. in the end of the article he talks about how we can change are habits and what we can do to change the world and help the safty for other people in third world country. over all this article is well writen and very imformational []

garrett __#|video__ clip link: [] [] [] [] [] [] []

Einstein observed that Brownian motion of particles exactly matches the motion of atoms and molecules. As the air risses, it cools and cindenses forming a towering cumulonimbus cloud eventually some of the cloud droplets become larger enough to fall as rain.

Hurricanes are type of cyclone a low pressure center surrounded by rotateing winds. a hurricane form over ocean water that is at least 26.5c (81f ) provides intential energy source for hurricane. as this upper level air is pulled into the storm, it provides the water vapor that must condense and and release. tornado like hurricane is a system rotating wind' around a low pressure center. the movement of these large air masses is a affected by high alltitude fast moving winds

jetstreams were discovered by air piolets attempting to cross the pacific ocean for the first time. air masses can cover areas as large as 750,000 square miles. the last type of cloud doesn't look like streaks of white across a blue sky citrus clouds. the speed of a hurricane is 155 mph. an average topical yclones form across the globe each year. 