Precipitation hydrometeor type

Slides:

Advertisements

Similar presentations

THE WATER CYCLE The water cycle — the continuous exchange of water between Earth's surface and atmosphere — is Earth's natural mechanism for recycling.

Advertisements

Water in the Atmosphere

Cloud Development and Precipitation

Chapter 7 Precipitation Processes Chapter 7 Precipitation Processes.

Precipitation I. RECAP Moisture in the air (different types of humidity). Condensation and evaporation in the air (dew point). Stability of the atmosphere:

Precipitation Chapter 7

AOSC 200 Lesson 8.

Precipitation Types Global and Regional Mean Precipitation 1. Types of Precipitation: 2. Measurement: FIT, Feb 15,

Precipitation Formation How can precipitation form from tiny cloud drops? 1.Warm rain process 2.The Bergeron (ice crystal) process 3.Ice multiplication.

Precipitation Precipitation is any form of water that falls to the Earth's surface. 1.

ATS 351 Lab 7 Precipitation March 7, Droplet Growth by Collision and Coalescence Growth by condensation alone takes too long Occurs in clouds with.

Part 2. Water in the Atmosphere Chapter 7 Precipitation Processes.

Lecture 13: Precipitation W & H: Sections 6.4 and 6.5.

Chapter 5: Cloud Development and Precipitation Atmospheric Stability Atmospheric Stability Determining stability Determining stability Cloud development.

Chapter 4 (cont.) Precipitation. How does precipitation form? Why do some clouds generate precipitation and others do not? What factors determine the.

Aerosol effects on rain and hail formation and their representation using polarimetric radar signatures Eyal Ilotovich, Nir Benmoshe and Alexander Khain.

Chapter 7 – Precipitation Processes

Chap. 12 Freezing Precipitation and Ice Storms. Learning objectives 1.Explain the processes by which freezing precipitation forms 2.Recognize on a sounding.

1 Chapter 10 Cloud and Precipitation Lesson Cloud Droplet Formation Coalescence Theory –Droplets grow by merging with one another. –Occurs in ‘warm.

Determining Precipitation Type

A Conceptual Model for the Hydrometeor Structure of Mesoscale Convective Systems during the MJO Active Stage Hannah C. Barnes Robert A. Houze, Jr. University.

A Conceptual Model for the Hydrometeor Structure of Mesoscale Convective Systems during the MJO Active Stage Hannah C. Barnes Robert A. Houze, Jr. University.

Hail. What is hail? Hail is a ball or irregular clump of ice Hail is different from winter precipitation! –Not sleet (raindrops that have frozen) –Not.

1. Clouds are made up of: A.Liquid water droplets B.Ice Crystals C.Water Vapor D.A combination of liquid water, ice, and water vapor.

Nature of Storms Chapter 13.

Determining Precipitation Type. Rain (R, RA)- Rain is liquid precipitation that reaches the surface in the form of drops that are greater than 0.5 millimeters.

Chapter 8: Precipitation ATS 572. “Precipitation” Can be: 1.Rain 2.Snow 3.Hail 4.Etc. However, it MUST reach the ground. –Otherwise, it is called “virga”—hydrometeors.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Precipitation Chapter 23 Objectives Identify the four forms.

Why does it rain on us???.

Chapter 7 Precipitation. An ordinary cloud droplet is extremely small (~20 micrometers) 100 times smaller than an average raindrop if in equilibrium…

A cloud is a visible aggregate of tiny water droplets and/or ice crystals suspended in the atmosphere They can exist in a variety of shapes and sizes.

Funded by NSF –Grant AGS Conceptual Model of Mesoscale Convective Systems (MCSs) ConvectiveStratiform TOGA COARE: 3D, layer airflow Kingsmill.

Types of Precipitation Precipitation comes in two forms Precipitation comes in two forms Liquid – rain, drizzle Liquid – rain, drizzle Solid - freezing.

How Precipitation Forms: The Bergeron Process pp

NATS 101 Section 13: Lecture 13 Precipitation. Precipitation: Any form of water particles—liquid or solid—that falls from the atmosphere and reaches the.

Chapter 7 Precipitation Processes Chapter 7 Precipitation Processes.

Cloud Formation. Review LCL & Dew Point The Sun’s radiation heats Earth’s surface, the surrounding air is heated due to conduction and rises because of.

Impact of Cloud Microphysics on the Development of Trailing Stratiform Precipitation in a Simulated Squall Line: Comparison of One- and Two-Moment Schemes.

1 Detailed Microphysical Model Simulations of Freezing Drizzle Formation Istvan Geresdi Roy Rasmussen University of Pecs, Hungary NCAR Research funded.

The ice phase in clouds We began to look at how ice crystals, once formed, grow in the atmosphere Growth from vapor phase Analogies to drop growth, but.

Clouds (Condensed PPT)

Stability, Adiabatic Processes, Precipitation

Chapter 7: Precipitation Processes

EASC 11 Clouds and Precipitation

Class #25: Friday, March 6 Clouds, fronts, precipitation processes, upper-level waves, and the extratropical cyclone Class #25: Friday, March 6, 2009.

Chapter 5: Cloud Development and Precipitation

Yumin Moon & David S. Nolan (2014)

Precipitation Elements

Bellwork 4/3 Welcome Back 

Chapter 5: Cloud Development and Precipitation

Unit Weather Precipitation.

5. Formation and Growth of Ice Crystals

“Don’t make me read, make me understand “

Water in the Atmosphere

Microphysics of Cold Clouds

Precipitation Notes.

Precipitation I.

Precipitation Notes.

Precipitation Notes.

Concept of Stability Stable Rock always returns to starting point

It all starts with water

Microphysics of 2-Day Rain Events During the Active Stage

rain – snow – sleet - hail

Dual-Aircraft Investigation of the Inner Core of Hurricane Nobert

PRECIPITATION Chapter 11.3 notes.

Braun, S. A., 2006: High-Resolution Simulation of Hurricane Bonnie (1998). Part II: Water Budget. J. Atmos. Sci., 63, Gamache, J. F., R. A. Houze.

Clouds, Stability, Adiabatic Processes, Precipitation

HYDROMETEORS (Chap. 7).

How do snow, sleet, and hail form?

How does rime accretion rate (RAR) influence charge transfer?

Presentation transcript:

Precipitation hydrometeor type Paper review Precipitation hydrometeor type relative to the mesoscale airflow in mature oceanic deep convection of the Madden‐Julian Oscillation Wei-Jen Tseng Barnes, H. C., and R. A. Houze Jr. (2014), Precipitation hydrometeor type relative to the mesoscale airflow in mature oceanic deep convection of the Madden‐Julian Oscillation, J. Geophys. Res. Atmos., 119, 13990–14014

Keywords: Aggregation ice particles collect other ice particles Factors depends strongly on temperature (㊝ above -5℃, ㊡ below -20 ℃) crystal type (arms of dendrites grows between - 10 ℃ and -16 ℃) supersaturation (wetness and hence sticking efficiency)

Keywords: Riming ice particles collect liquid drops (contact freezing) Factors the size of the supercooled drops (radius threshold:10mm, but decreases for the largest cloud droplets [100mm] ) Reynolds number (Re=2VD/ν) V: terminal velocity (ice) D: drop diameter ν :viscosity of the air type of ice particle Keep riming … graupel and hail (a) A lightly rimed needle,, (c) densely rimed plate, (e) lump graupel From Wallace and Hobbs (1977). Copyright Elsevier.

Keywords: PID HONGPING LIU AND V. CHANDRASEKAR (2000)

G/RA: graupel/rimed aggregates HR/MR/LR: heavy/moderate/light rain WA/DA: wet/dry aggregates SI: small ice particles HI: horizontally oriented ice crystals.

Certainty of PID

Convective region

Convective region

Stratiform region

Stratiform region

Summary Convective core Low level: Moderate rain. Above ML: Dry aggregates (environment). Behind and below: Heavy rain and Graupel/rimed aggregates. They are related to convective scale downdrafts. G/RAs exist in a narrow zone (just a few kilometers above ML). No hail (updrafts over tropical oceans are not large enough and survive below ML) Melting level (ML) of the convective region is sometimes marked by band of WA. Edge of the convective region .. Decreased rain intensity and SI

Summary Stratiform region 2 types, 1 conceptual model. Rain intensity decreases toward anvil. LR > MR > HR (midlevel inflow @ sfc.) Too heavy to move. Layered ice hydrometeors: WA(@ML), DA, then SI (at the highest level). Weak vertical motions allow gravity settle. G/RAs above WA: collapsing deep convective cores or localized convection (Kelvin-Helmholtz instability) Horizontally-oriented ice (HI): associated with enhanced dendritic growth by vapor deposition