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Jet Stream

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Why? Files segment describing the effects of the jet stream on local environments.

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Thanks for seeing us Mr. Eco. We need to learn more about a jet stream. 00:00:00
Sure, I can show you a jet stream. 00:00:04
You have one here? 00:00:06
Only on a screen. What do you guys know about jet streams? 00:00:07
We know that a jet stream is like a river of wind, way up high in the atmosphere. 00:00:11
And that they can travel up to a few hundred miles per hour. 00:00:14
That's great. 00:00:17
Is the jet stream always in the same place? 00:00:18
No, let me show you. 00:00:21
Actually guys, there are multiple jet streams. Let's take a look at a couple of them. 00:00:25
We have what we call the northern jet, and that is outlined in the blue. 00:00:28
That's responsible for a lot of the cold air that comes down to the east coast. 00:00:31
And then we have what we call the subtropical jet. 00:00:35
That is outlined in the red right here. 00:00:38
And that's responsible for bringing in a lot of warm, moist air for the east coast. 00:00:40
We need to know if a jet stream was passing up our area the week that Mount Lemona surrupted. 00:00:45
Sure, let's go look at the data. 00:00:50
Actually look, over the past five to seven days, notice how the jet stream just goes further and further south. 00:00:53
And what that does is it brings in all types of systems, and it's basically just below us, 00:00:59
which lets everything drain down into our region. 00:01:04
So you can see as the jet stream goes further south, all of the clouds and all of the debris comes right down on top of us. 00:01:06
That has to be it then. 00:01:12
If the jet stream traveled at a hundred miles per hour, and Mount Luminous is 7,000 miles away, 00:01:14
it would take 70 hours for the ash to reach our area. 00:01:19
With 24 hours in a day, three days would be 72 hours. 00:01:22
That means that the jet stream could cause the sunrises and sunsets to be red. 00:01:25
I think you guys have solved the mystery. 00:01:29
Thanks, Mr. Eco. We really appreciate your help. 00:01:31
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Idioma/s:
en
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
282
Fecha:
28 de mayo de 2007 - 15:32
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
01′ 34″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
9.54 MBytes

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