jet stream

The jet stream is a fast-flowing, narrow air current found high in the atmosphere, typically at altitudes of 30,000 feet, that plays a crucial role in shaping weather patterns across the globe. These powerful winds can influence temperature, precipitation, and even storm paths, making them essential for meteorologists to understand. By studying the jet stream, we can better predict weather changes and comprehend climate phenomena, highlighting its importance in both daily weather forecasts and long-term climate trends.

Get started

Scan and solve every subject with AI

Try our homework helper for free Homework Helper
Avatar

Millions of flashcards designed to help you ace your studies

Sign up for free

Achieve better grades quicker with Premium

PREMIUM
Karteikarten Spaced Repetition Lernsets AI-Tools Probeklausuren Lernplan Erklärungen Karteikarten Spaced Repetition Lernsets AI-Tools Probeklausuren Lernplan Erklärungen
Kostenlos testen

Geld-zurück-Garantie, wenn du durch die Prüfung fällst

Did you know that StudySmarter supports you beyond learning?

SS Benefits Icon

Find your perfect university

Get started for free
SS Benefits Icon

Find your dream job

Get started for free
SS Benefits Icon

Claim big discounts on brands

Get started for free
SS Benefits Icon

Finance your studies

Get started for free
Sign up for free and improve your grades

Review generated flashcards

Sign up for free
You have reached the daily AI limit

Start learning or create your own AI flashcards

StudySmarter Editorial Team

Team jet stream Teachers

  • 4 minutes reading time
  • Checked by StudySmarter Editorial Team
Save Article Save Article
Sign up for free to save, edit & create flashcards.
Save Article Save Article
  • Fact Checked Content
  • Last Updated: 12.03.2025
  • 4 min reading time
Contents
Contents
  • Fact Checked Content
  • Last Updated: 12.03.2025
  • 4 min reading time
  • Content creation process designed by
    Lily Hulatt Avatar
  • Content cross-checked by
    Gabriel Freitas Avatar
  • Content quality checked by
    Gabriel Freitas Avatar
Sign up for free to save, edit & create flashcards.
Save Article Save Article

Jump to a key chapter

    Play as podcast 12 Minutes

    Thank you for your interest in audio learning!

    This feature isn’t ready just yet, but we’d love to hear why you prefer audio learning.

    Why do you prefer audio learning? (optional)

    Send Feedback
    Play as podcast 12 Minutes

    Jet Stream - Definition

    What is a Jet Stream?

    Jet streams are fast, flowing air currents found in the atmosphere of Earth, primarily in the upper levels of the troposphere. They typically flow from west to east and can travel at speeds of up to 250 miles per hour (402 kilometers per hour). These currents play a crucial role in influencing weather patterns and are important in meteorology. They form at the boundaries of different air masses, such as warm tropical air and cool polar air. The jet stream can fluctuate in position and intensity due to various factors including seasons and local atmospheric conditions. There are several types of jet streams, but the two most significant ones include the polar jet stream and the subtropical jet stream.

    Jet Stream Causes

    The formation of jet streams is influenced by a variety of factors.The primary causes include:

    • Temperature Differences: The contrast in temperature between different air masses creates a pressure difference that drives the jet streams.
    • Earth's Rotation: The Coriolis effect, caused by the rotation of the Earth, helps to steer these fast-moving air currents.
    • Seasonal Changes: Changes in temperature between the equator and polar regions during different seasons affect the positioning and strength of the jet streams.
    These factors interact in ways that can lead to the jet streams becoming more stable or variable over time, resulting in various implications for weather systems, including storms and prolonged weather patterns. When the jet stream dips southward, it can lead to cooler temperatures and increased storm activities in lower latitudes.

    Current Jet Stream

    Jet Stream Explanation

    Jet streams are critical components of the Earth's atmosphere that significantly impact weather patterns across the globe. They are located in the upper atmosphere and consist of narrow bands of strong winds. Typically, jet streams are situated between the troposphere and stratosphere, where temperature differences between air masses create these powerful winds. The predominant types of jet streams include:

    • Polar Jet Stream: Found at mid-latitudes, this jet stream separates cold polar air from warmer air to the south.
    • Subtropical Jet Stream: Located higher in the atmosphere, this jet stream primarily influences weather patterns in the tropics and subtropics.
    Observing the current jet stream patterns can provide valuable insights into incoming weather systems. Meteorologists analyze these streams using satellite imagery and weather models to predict short-term and long-term weather forecasts.

    Jet Stream Example

    Example of Jet Stream Impact: A prominent example of how jet streams influence weather occurred in March 2021 when a deep polar jet stream dipped significantly southward over the United States. This phenomenon led to an unusual cold snap in southern states, resulting in:

    • Record low temperatures
    • Power outages due to increased energy demands
    • Winter storms producing significant snowfall
    This situation illustrates how shifts in the jet stream can create dramatic weather changes, impacting daily life and safety.

    jet stream - Key takeaways

    • Jet stream definition: Fast-flowing air currents in the Earth's atmosphere, primarily in the upper troposphere, typically flowing west to east at speeds up to 250 mph.
    • What is a jet stream? It is an essential component that influences weather patterns by forming at boundaries between warm tropical air and cool polar air.
    • Jet stream causes include temperature differences, Earth's rotation (Coriolis effect), and seasonal changes, affecting the jet stream's position and intensity.
    • Current jet stream patterns are crucial for meteorology, as they provide insight into weather systems and are analyzed for forecasting using satellite imagery.
    • Types of jet streams include the polar jet stream, found at mid-latitudes, and the subtropical jet stream, which affects tropical and subtropical weather patterns.
    • Jet stream example: The March 2021 polar jet stream dip led to a significant cold snap in the US, resulting in record low temperatures and severe weather conditions.
    Frequently Asked Questions about jet stream
    What is the role of the jet stream in weather patterns?
    The jet stream plays a crucial role in weather patterns by influencing the movement of air masses and storm systems. It acts as a boundary between cold polar air and warmer tropical air, affecting temperature and precipitation. Changes in the jet stream's position can lead to extreme weather events, such as storms and droughts.
    What causes the jet stream to change its position?
    The jet stream changes its position due to temperature differences between polar and tropical air masses. Seasonal variations, land-ocean contrasts, and atmospheric pressure systems also influence its path. Additionally, phenomena like El Niño can affect its strength and positioning.
    How does the jet stream affect air travel?
    The jet stream influences air travel by affecting flight routes, speeds, and times. Flights can take advantage of tailwinds from the jet stream to shorten travel time, while headwinds can lead to delays. It also impacts turbulence levels, which can affect passenger comfort.
    How do jet streams influence storm formation?
    Jet streams influence storm formation by guiding the movement of weather systems and enhancing convection. Their high-altitude winds can create areas of low pressure, leading to the development of storms. Changes in jet stream patterns can also intensify or weaken storms, affecting precipitation and wind patterns at the surface.
    What are the different types of jet streams?
    There are two main types of jet streams: the polar jet stream, which forms at the boundary between cold polar air and warmer air to the south, and the subtropical jet stream, located at higher altitudes in the subtropics. Each affects weather patterns and climate differently.
    Save Article

    Test your knowledge with multiple choice flashcards

    Where are jet streams primarily located in the atmosphere?

    What are jet streams?

    What are jet streams?

    Next
    How we ensure our content is accurate and trustworthy?

    At StudySmarter, we have created a learning platform that serves millions of students. Meet the people who work hard to deliver fact based content as well as making sure it is verified.

    Content Creation Process:
    Lily Hulatt Avatar

    Lily Hulatt

    Digital Content Specialist

    Lily Hulatt is a Digital Content Specialist with over three years of experience in content strategy and curriculum design. She gained her PhD in English Literature from Durham University in 2022, taught in Durham University’s English Studies Department, and has contributed to a number of publications. Lily specialises in English Literature, English Language, History, and Philosophy.

    Get to know Lily
    Content Quality Monitored by:
    Gabriel Freitas Avatar

    Gabriel Freitas

    AI Engineer

    Gabriel Freitas is an AI Engineer with a solid experience in software development, machine learning algorithms, and generative AI, including large language models’ (LLMs) applications. Graduated in Electrical Engineering at the University of São Paulo, he is currently pursuing an MSc in Computer Engineering at the University of Campinas, specializing in machine learning topics. Gabriel has a strong background in software engineering and has worked on projects involving computer vision, embedded AI, and LLM applications.

    Get to know Gabriel

    Discover learning materials with the free StudySmarter app

    Sign up for free
    1
    About StudySmarter

    StudySmarter is a globally recognized educational technology company, offering a holistic learning platform designed for students of all ages and educational levels. Our platform provides learning support for a wide range of subjects, including STEM, Social Sciences, and Languages and also helps students to successfully master various tests and exams worldwide, such as GCSE, A Level, SAT, ACT, Abitur, and more. We offer an extensive library of learning materials, including interactive flashcards, comprehensive textbook solutions, and detailed explanations. The cutting-edge technology and tools we provide help students create their own learning materials. StudySmarter’s content is not only expert-verified but also regularly updated to ensure accuracy and relevance.

    Learn more
    StudySmarter Editorial Team

    Team Geography Teachers

    • 4 minutes reading time
    • Checked by StudySmarter Editorial Team
    Save Explanation Save Explanation

    Study anywhere. Anytime.Across all devices.

    Sign-up for free

    Sign up to highlight and take notes. It’s 100% free.

    Join over 22 million students in learning with our StudySmarter App

    The first learning app that truly has everything you need to ace your exams in one place

    • Flashcards & Quizzes
    • AI Study Assistant
    • Study Planner
    • Mock-Exams
    • Smart Note-Taking
    Join over 22 million students in learning with our StudySmarter App
    Sign up with Email

    Join over 30 million students learning with our free Vaia app

    The first learning platform with all the tools and study materials you need.

    Intent Image
    • Note Editing
    • Flashcards
    • AI Assistant
    • Explanations
    • Mock Exams