# Water Vapour Imagery Pallet

## Table of Contents

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### I. Introduction

A short introduction to this module is given in this chapter.

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### II. The concept of PV and its relation to WV imagery

Apart from ascending and descending atmospheric flows, the concept of vorticity in an air parcel is of equal importance for understanding the dynamics of the troposphere.

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### III. Cyclogenesis in WV imagery - Baroclinic Leaf

Get introduced to the Baroclinic leaves, which are cloud or moisture patterns that can be found on the front sides of high level troughs, most often located downstream of PV anomalies.

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### IV. Black stripes: Jets and Tropopause folding

The distribution of humid and dry regions depends not only on vertical motion in the troposphere but also on the horizontal movement of air.

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### V. Transverse cloud bands in WV imagery

Transverse cloud bands are often seen as substructures in high level cirrus cloud bands accompanying the subtropical jet stream.

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### VI. Deformation zones in WV imagery

Deformation zones are regions where the atmospheric flow is undergoing contraction in one direction and elongation (or stretching) in the perpendicular direction.

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### VII. Convective initiation at WV boundaries

This chapter deals with deep moist convection (DMC) triggered in the upper levels, which can be seen in WV images.

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### VIII. Real and simulated WV imagery

This chapter will focus on three ways in which simulated WV images can deviate from real ones: Displacements; Patterns and sub-structures; Greyscales

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### IX. Meteorological Products based on WV imagery

This chapter will present some of VW-based meteorological products and RGB combinations.

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