'Polar front' diaporamas de présentation

The long term record of climate change

The long term record of climate change . Or: 50 million years of climate change in 80 minutes. Controls on climate. Tectonics Ocean circulation Orbital parameters. Oxygen isotopes have different controls on different time scales. The reasons for the isotopic change has 2 forcings. colder.

727 views • 60 slides

Polar ecosystems

Polar ecosystems. Arctic/Antarctic contrasts Tundra - the physical template (climate, landforms, soils) Tundra plant and animal communities Winter survival Population cycles Management issues Responses to future climate change. land: 8 X 10 6 km 2 (30% ice)

846 views • 60 slides

Upper-Level Frontogenesis

Upper-Level Frontogenesis. Cliff Mass University of Washington. Early Days. In the first half of the 20 th century there was no concept of upper-level fronts. Most studies described a polar front that extended from the surface to the tropopause.

831 views • 55 slides

Atmospheric Circulations

Atmospheric Circulations. Prof. John Toohey-Morales, CCM St. Thomas University Miami Gardens, Florida. Scales of Motion. Circulations exist in all sizes within the atmosphere

1.01k views • 44 slides

Part 3. Distribution and Movement of Air

Part 3. Distribution and Movement of Air. Chapter 8 Atmospheric Circulation and Pressure Distributions. Planetary Winds. Well-defined pressure patterns exist across the Earth that induce the global wind patterns on the planet. Idealized Single-Cell Convection Model for a Planet.

596 views • 42 slides

Mid-latitude Cyclones

Chapter 12. Mid-latitude Cyclones. Polar Front Theory. Polar front is a semi-continuous boundary separating cold, polar air from more moderate mid-latitude air Mid-latitude cyclone (wave cyclone) forms and moves along polar front in wavelike manner

1.59k views • 37 slides

Cyclogenesis in Polar Airstreams

Cyclogenesis in Polar Airstreams. Not all midlatitude cyclones develop along the main polar front/baroclinic zone . Range in size from comma clouds (big) to polar lows (small). Comma Clouds: 500-1500 km. Polar Lows: 100-500 km. Comma Clouds.

530 views • 36 slides

Ken O. Buesseler

487 views • 35 slides

480 views • 33 slides

Frontal depressions

Frontal depressions. Learning Objectives: To understand the formation and development of a depression To know the sequence of weather associated with a depression To know the characteristics of an anticyclone and the contrasting weather conditions between winter and summer. .

1.18k views • 30 slides

Weather Patterns

Weather Patterns. Dr. R. B. Schultz. Weather Producers. The primary weather producer in the middle latitudes (for our purposes, the region between southern Florida and Alaska) is the middle-latitude cyclone .

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What Makes the Wind Blow?

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ATS-113

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Forecasting Polar Lows

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Lecture 15 Air Masses & Fronts

Lecture 15 Air Masses & Fronts. What is an air mass?. Air Mass really big blob of air with similar properties Usually 1600 km (1000 miles) across Several km thick Change in weather when one air moves out and a new air moves in Also known as a FRONTAL PASSAGE

445 views • 23 slides

Depression

Depression. 2/M John R. Jaromahum. or 'lows' play an important part in the weather tending to bring rain and strong winds. Depressions follow a life cycle of about 2-5 days. Depressions. Depressions.

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Chapter 11: Ascending and Descending Air

278 views • 17 slides

Weather Part III Storms

324 views • 17 slides

Weather Disturbances

598 views • 16 slides

Observations of Winds & Currents

1. Observations of Winds & Currents. Circulation of the Atmosphere: The Hadley Circulation Knowledge of global winds comes from two sources: the patterns of pressure and winds observed worldwide, and theoretical studies of fluid motion.

386 views • 12 slides