New Saturation Adjustment for the COSMO model

Slides:

Advertisements

Similar presentations

VERIFICATION Highligths by WG5. 9° General MeetingAthens September Working package/Task on “standardization” The “core” Continuous parameters: T2m,

Advertisements

COSMO Workpackage No First Results on Verification of LMK Test Runs Basing on SYNOP Data Lenz, Claus-Jürgen; Damrath, Ulrich

1 Chemical Equilibrium GLY Lecture 5 Fall, 2014.

Elevation It gets colder the higher in elevation you go. As air rises, it expands because of lower air pressure. As the air expands, it cools. When air.

Verification of DWD Ulrich Damrath & Ulrich Pflüger.

Fig The net work done by the system in the process aba is –500 J.

Department of Mechanical Engineering ME 322 – Mechanical Engineering Thermodynamics Lecture 29 The Vapor Compression Refrigeration (VCR) Cycle.

Power Generation Cycles Vapor Power Generation The Rankine Cycle

COSMO General Meeting Zurich, 2005 Institute of Meteorology and Water Management Warsaw, Poland- 1 - Verification of the LM at IMGW Katarzyna Starosta,

Long-term trends of the quality of COSMO-EU forecast expressed as the universal score COSI and others scores for temperature 2 m and wind 10 m - related.

Topic 10 Sections 2 and 3.  Statement Number Assessment Statement Deduce an expression for the work involved in a volume change of a gas at constant.

THERMODYNAMICS CH 15.

Example of a Spring Wind in Lubbock, Texas!. Ch. 4: Macroscopic Parameters & Measurement: Classical Thermo, Part I.

M. Baldauf, DWD Numerical contributions to the Priority Project ‘Runge-Kutta’ COSMO General Meeting, Working Group 2 (Numerics) Bukarest,

Thermodynamics. Thermodynamic Process in which energy is transferred as heat and work.

Physics Unit 6: Thermodynamics

Introducing the Lokal-Modell LME at the German Weather Service Jan-Peter Schulz Deutscher Wetterdienst 27 th EWGLAM and 12 th SRNWP Meeting 2005.

Ulrich Blahak, DWD, COSMO General Meeting 2013 Sibiu1 WG3a activities in cloud microphysics and radiation Ulrich Blahak, for the large part on behalf of.

Verification methods - towards a user oriented verification WG5.

1 Lesson 02: Humidity: Water in the Air Pages

The Thermodynamic Cycle. Heat engines and refrigerators operate on thermodynamic cycles where a gas is carried from an initial state through a number.

10 th COSMO General Meeting, Krakow, September 2008 Recent work on pressure bias problem Lucio TORRISI Italian Met. Service CNMCA – Pratica di Mare.

Deutscher Wetterdienst Fuzzy and standard verification for COSMO-EU and COSMO-DE Ulrich Damrath (with contributions by Ulrich Pflüger) COSMO GM Rome 2011.

U. Damrath, COSMO GM, Athens 2007 Verification of numerical QPF in DWD using radar data - and some traditional verification results for surface weather.

10 th COSMO General Meeting, Krakow, September 2008 Recent work on pressure bias problem Lucio TORRISI Italian Met. Service CNMCA – Pratica di Mare.

COSMO General Meeting 2008, Krakow Modifications to the COSMO-Model Cumulus Parameterisation Scheme (Tiedtke 1989): Implementation and Testing Dimitrii.

Properties of Matter. Important Vocabulary -Physical Property -Solubility -Melting Point -Boiling Point -Solvent -Solute -Saturated -Unsaturated -Supersaturated.

Superheat Rankine Cycle Example Turbine pump condenser Q out Q in W out W in boiler Consider the superheat Rankine power cycle as we analyzed before.

Deutscher Wetterdienst FE VERSUS 2 Priority Project Meeting Langen Use of Feedback Files for Verification at DWD Ulrich Pflüger Deutscher.

VERIFICATION Highligths by WG5. 2 Outlook The COSMO-Index COSI at DWD Time series of the index and its DWD 2003.

Dr. Owen Clarkin School of Mechanical & Manufacturing Engineering Summary of Energy Topics Chapter 1: Thermodynamics / Energy Introduction Chapter 2: Systems.

Summary of WG3 activities Physical Aspects Federico Grazzini, ARPA Emilia-Romagna Servizio Idro Meteo Clima (SIMC)

Chapter 3: Conservation of Energy. Important Notation 2.

New results in COSMO about fuzzy verification activities and preliminary results with VERSUS Conditional Verification 31th EWGLAM &16th SRNWP meeting,

Chapter: 07 ENTROPY.

COSMO General Meeting, 19 September 2007

Introducing the Lokal-Modell LME at the German Weather Service

Water in the Air.

Studies with COSMO-DE on basic aspects in the convective scale:

Current verification results for COSMO-EU and COSMO-DE at DWD

QPF sensitivity to Runge-Kutta and Leapfrog core

Chapter: 08 POWER CYCLES.

Weather Maps Isotherms and Isobars.

Copyright © 2014 R. R. Dickerson & Z.Q. Li

Lecture 4 Effects of Cumulus on Large Scale Heat Budgets

SCIENCE GRADE FOUR – WEATHER

انواع اواپراتورها.

The First Law of Thermodynamics

Three cylinders Three identical cylinders are sealed with identical pistons that are free to slide up and down the cylinder without friction. Each cylinder.

B.Sc.I, Paper II ( I Semester)

Humidity and Stability

Chapter 3.2 – Changes of State

COSMO-DE-EPS Susanne Theis, Christoph Gebhardt, Michael Buchhold,

Ulrich Damrath Deutscher Wetterdienst

What happens to the mass when a solution is formed?

Christoph Gebhardt, Zied Ben Bouallègue, Michael Buchhold

Solubility Curves.

Chapter 9 Meteorology.

Огторгуй ба амидрал Cosmos and life

By : Jagdeep Sangwan The Vapor Compression Refrigeration (VCR) Cycle.

1. Transformations of Moist Air

Two or more materials stirred together or combined

Ulrich Pflüger & Ulrich Damrath

Weather and Water Cycle Review

Tuesday 1/3 What type of weather would a maritime polar air mass bring? Dry and warm Warm and humid Dry and cold Wet and cold.

COSMO PP QPF workshop 8 March 2006 Langen Marco Arpagaus.

How Does air move across the surface?

Overview of WG3a activities Upper air physical aspects

Presentation transcript:

New Saturation Adjustment for the COSMO model Ulrich Blahak, Axel Seifert German Weather Service, Offenbach Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Motivation Present saturation adjustment is formulated as an isobaric process and does not conserve mass. During evaporation, mass is created and during condensation, mass is destroyed. Because in total, there is more condensation than evaporation (due to precipitation), net sink of mass. COSMO seems to be too dry compared to observations. Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Saturation adjustment x in kg/kg T_0, x_v0, x_c0 T_adj, x_vadj, x_cadj Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Saturation adjustment Solution to achieve mass conservation during the process: Make it isochoric! Implications: Change of thermodynamic formulation based on the first principle, adding pressure diagnosis after adjustment (→ let the model deal with the introduced pressure perturbation) Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Isochoric saturation adjustment Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Saturation adjustment x in kg/kg T_0, x_v0, x_c0 T_adj, x_vadj, x_cadj adiab. expansion happening in the next timestep Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Saturation adjustment Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Testing idealized cases Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Testing idealized cases Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Testing idealized cases Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO EU June 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO EU June 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO EU June 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO EU June 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Verification – COSMO DE Jul/Aug 2010 Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010

Summary + Outlook Isochoric saturation adjustment does conserve mass and seems to increase precipitation for both EU and DE. Also influence on precipitation structure Verification results so far indecisive: FBI improved, biases of T and p reduced, but other scores show no clear improvement. Nevertheless, it will be more thoroughly tested in the framework of „65 levels for COSMO-DE“ Ulrich Blahak, DWD, COSMO General Meeting, Moskow, 5.9.2010