Risultati di ricerca
Jet Stream ® Ultra Blowing Wool. 5.0. (10) Write a review. Our flagship blown-in insulation for insulating new construction and existing buildings. This insulation provides consistent thermal performance against outdoor temperatures and helps maintain indoor temperatures. Greater thermal resistance means better temperature control.
- Overview
- How jet streams affect the weather
- Climate change and the jet stream
The air currents that drive the world's weather are being disrupted by climate change, here's how.
Jet streams are fast-moving currents of air that circulate above the Earth. When people refer to "the jet stream" they are usually referring to the polar-front jet stream or the subtropical jet stream, two major currents that shape weather patterns around the world.
Jet streams travel in the tropopause—the area between the troposphere and the stratosphere—that hovers between five and nine miles above the Earth's surface. These strong air currents look like wavy rivers when seen on a jet stream map and form when cold air and hot air meet. Their winds blow from west to east at speeds that range from 80 to 140 miles per hour, but they can reach more than 275 miles per hour.
Jet streams are stronger in winter because that's when the air temperature differences that drive them tend to be the biggest. The polar-front jet stream forms at about 60 degrees latitude in both hemispheres, while the subtropical jet stream forms at about 30 degrees.
Jet stream patterns have a big impact on the weather.
These currents are always changing—moving to higher or lower altitudes, breaking up, and shifting—depending on the season and other variables, such as energy coming from the sun. During winter, jet streams tend to move toward the equator, and they move back toward the poles in spring.
Air north of a jet stream is typically colder, while air to the south is usually warmer. As jet streams dip or break off, they move air masses around, creating shifts in global weather patterns. A large buckle in the jet stream, for example, is what pulled Hurricane Sandy ashore in New Jersey in 2012. And a wavy jet stream is partially responsible for the billion-dollar freeze that struck Texas in 2021.
2:41
What Is the Polar Vortex?
Mark Serreze of the National Snow and Ice Data Center explains how fluctuations in the polar front jet stream sank U.S. temperatures to record lows in January 2014.
Because the Earth's polar regions are warming more quickly than the rest of the world, the temperature contrast that drives jet streams has decreased. On average, the Arctic is warming four times faster than the tropics.
Slower, weaker jet streams have been linked to melting in Greenland, which is particularly concerning because if all the country's ice were to melt, it could cause 23 feet of global sea level rise.
A potential rise in deadly weather events is expected to occur as the jet stream is increasingly disrupted. A 2022 study suggests the jet stream will became wavier and stagnant as the planet warms, allowing weather like extreme rainfall to "park" over a region and causing dangerous flooding.
Studies also have linked a warming Arctic with more severe winter weather in the United States, even though other reports note that on average, winter cold snaps are actually getting warmer because of climate change. Severe winter weather outbreaks result when a weak jet stream allows the polar vortex, a swirling low-pressure center at the North and South poles, to send cold Arctic air south.
These atmospheric currents are complex, and scientists are still trying to understand how these influential jet streams are changing.
One study published in 2023 found that some of the fastest winds moving through the jet stream—known as "jet streaks"—will move even faster as the planet warms and influences how much water vapor is held in the atmosphere. Quicker moving jet streaks may be responsible for a record-setting passenger flight that hit speeds of 800 miles per hour in 2019. While trans-Atlantic flights may be faster, the study also suggests turbulence will increase too.
- Christina Nunez
- 3 min
20 set 2023 · Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere, typically occurring around 30,000 feet (9,100 meters) in elevation. Within jet streams, the winds blow from west to east, but the band often shifts north and south because jet streams follow the boundaries between hot and cold air. Since thes
FACT SHEET. Jet Stream® ULTRA Blowing Insulation. THIS IS FIBERGLASS BLOWING INSULATION. READ THIS BEFORE YOU BUY. What you should know about R-Values. The chart shows the R-value of this insulation. R means resistance to heat flow. The higher the R-value, the greater the insulating power. Compare insulation R-values before you buy.
- 62KB
- 2
19 ott 2023 · Jet streams are currents of air high above Earth. They move eastward at altitudes of about eight to 15 kilometers (five to nine miles). They form where large temperature differences exist in the atmosphere. An air current is a flowing movement of air within a larger body of air. Air currents flow in the atmosphere, the layers of air surrounding ...
Jet Stream® ULTRA Blowing Insulation is an unbonded fiberglass blowing insulation designed with optimal thermal properties in addition to excellent coverage and blowing characteristics. APPLICATION. Open attics of both new and existing structures. Closed cavity applications behind fabric or netting. BIBS® (Blow-in-Blanket® System) approved fiber.
Jet Stream Ultra Blowing Wool Insulation Guide Spec, Technical Data Sheet For spec help, contact us or call 317 421 8727 See LCA, interpretation & rating systems See materials, interpretation & rating systems Features & functionality Fills all gaps, creating a thermal barrier against outside air and reducing utility bills
