Skew-T Mastery

https://www.meted.ucar.edu/mesoprim/skewt/table_of_contents.htm

SkewT/LogP图解
Skew-T / Log-P 教程---Meted

image.png image.png

Since the advent of rawinsonde observations, thermodynamic diagrams have been used to plot sounding data and to assess atmospheric stability. Despite numerous advancements in technology and forecast techniques, the thermodynamic diagram remains an essential tool for today's weather forecaster. Analysis of soundings has now extended well beyond traditional rawinsonde data to include sounding data observed remotely by satellites or produced by NWP models.

There are several thermodynamic diagrams used for sounding analysis in research and operations in the atmospheric sciences, including the Stüve diagram, the emagram, the tephigram and the skew-T/log-P diagram. This module focuses on the skew-T/log-P, widely used for over 60 years by operational forecasters in the United States Air Force, Navy, and National Weather Service. Much of the material for this module is drawn from the document The Use of the Skew-T/Log-P Diagram in Analysis and Forecasting (1990) of the Air Weather Service, which has been an essential sounding analysis reference manual for operational forecasters through the years.

Reference: The Use of the Skew-T/Log-P Diagram in Analysis and Forecasting, AWS/TR-79/006, Air Weather Service, Revised March 1990.

---

1. Skew-T Description

This chapter introduces the skew-T/log-P diagram, describes the lines on it, and describes sounding data in general.

Go

2. Parameters

This chapter describes various parameters derived from the skew-T/log-P diagram in these categories: moisture, humidity, temperatures, levels, stability, and shear.

Go

3. Stability

This chapter describes various aspects of stability, including how to determine stability, how stability changes, and other forms of instability.

Go

4. Forecast Applications

This chapter presents several forecast applications using a skew-T/log-P diagram, including those related to boundary layer, convection, winter weather, turbulence, and icing.

Go

Interactive Skew-T

Access the Interactive Skew-T diagram (will open in a separate window). The Interactive Skew-T diagram is a tool which allows you to plot and manipulate sounding data on a skew-T/log-p diagram. It will be used throughout this module to help you answer questions and work through exercises.

Go