You asked for Critical Remarks – Here are a few...

Environmental Wind Tunnel Laboratory EWTL @ ZMAW www.mi.uni-hamburg.de/windtunnel ewtl@zmaw.de

FAIRMODE FAIRMODE

You asked for Critical Remarks –

Here are a few subjective views after having heard the talks and ‘glanced over’ the two “Scoping Papers”:

Meso - and Micro Scales: The two scoping papers reveal predominantly “meso- scale”- thinking !

You criticise, e.g., that in the EU AQD terms like

“uncertainty” remain ambiguous.

You use terms which are ill-defined too. Examples:- Representativeness

- Variability and Uncertainty

- Evaluation and Validation

- Fitness for Purpose

- ……

A Glossary of Terms is missing

“Representativeness errors arise when

comparing point observations with gridded

model averages”

t fs [h]

0.5 0.6 0.7 0.8 0.9 10

250U ref = 4m/sC* Mean = 23.45

t fs [h]

5 5.1 5.2 5.3 5.4 5.50

U ref = 4m/sC* Mean = 12.15

Concentration Time Series from a Street Canyon

30 min and 60 min averages are too short to be representative

Longer average times are not adequate due to the diurnal cycle

Short time averages taken in the field have the character of snapshots only.

30 min Mean Concentration Values from a Street Canyon

• FAIRMODE is a modellers' network in support of the new EU Air Quality Directive.

• It is a joint action by EEA and JRC/Ispra.

• Two work groups

– WG1 on Guidance on the Use of Models

– WG2 on Quality Assurance of Models

from Helge Olesen:

Who delivers the data ???Who cares for the QUALITY of DATA ???

Many data sets are available but most of them do not have the quality which is necessary for model validation !

Validation data sets need to be 1. complete (initial and boundary conditions,

source strength, geometry….),2. representative (with respect to time and

space),3. quality assured (known uncertainties),4. model specific.

Which data sets do you believe will qualifyas reliable standards ???

Who cares for the QUALITY of DATA ???

Within the urban roughness layer obstacles dominate the dispersion. Computer power gets cheaper every day. Obstacle resolving prognostic models get a much bigger share than in the past.

IS THAT TAKEN INTO ACCOUNT ??

COST 732 “Quality Assurance and Improvement of

Micro-Scale Meteorological Models”: Work in Progress

Quality assurance of models in not a question of “right” or “wrong” in a scientific sense.

It is a knowledge-based activity and has a lot to do with consensus building within the community of model developers and users.

The best we can do is improving “the culture within which models are developed and applied”.

IS A TOP DOWN APPROACH APPROPRIATE HERE ??

from Helge Olesen:

You asked for Critical Remarks – Here are a few...

Documents

Technische Implementation von CERA Hannes Thiemann Max-Planck-Institut für Meteorologie Modelle und Daten hannes.thiemann @ zmaw.de Jena, 24. Januar 2007

Thermohaline Overtuning – at Risk? Detlef Quadfasel, THOR Project Office KlimaCampus, University of Hamburg, Germany THOR.eu@zmaw.de

Long term data archive - uni-hohenheim.de · COPS data management: cops@zmaw.de 26.-28. Mar 07 / 3 • archive instrument data, model data, quicklooks and alerts • For observation

Long term data archive - projekte.uni-hohenheim.de€¦ · COPS data management: cops@zmaw.de 26.-28. Mar 07 / 3 • archive instrument data, model data, quicklooks and alerts •

Aerosol-, Cloud- and Chemistry Modeling in …...Aerosol-, Cloud- and Chemistry Modeling in ECHAM5 Workshop Summary Editors: Johann Feichter (johann.feichter@zmaw.de) and Martin Schultz

itMilnii'mu' Eight-mil- ZMaw Herbring's€¦ · LOCAX. AND FKBSONAI.. ' Captain Edersby of Eight-mil-e was in. the city Friday.C. W. and Mrs. VanDuyn of Tygh Valley.were in the city

A new methodology to assess the performance and uncertainty of …fairmode.jrc.ec.europa.eu/document/fairmode/WG3/Belisetal2015b.pdf · highlights Intercomparisons were carried out

SIAM J. S COMPUT c Vol. 31, No. 5, pp. 3827–3846 · BERNARDO COCKBURN†,BODONG ‡, JOHNNY GUZMAN´ , ... Germany (marco.restelli@zmaw.de). This author’s work was supported by

LGM ice sheets simulated with a complex fully coupled ice ... · LGM ice sheets simulated with a complex fully coupled ice sheet – climate model ... florian.ziemen@zmaw.de;

Numerical diffusion in sectional aerosol modells Stefan Kinne, MPI-M, Hamburg stefan.kinne@zmaw.de DATA in global modeling aerosol climatologies & impact

Fairmode Athens 19-21 June 2017 CMAP/CEMAP TOOL on ...fairmode.jrc.ec.europa.eu/document/fairmode/event/... · CMAP/CEMAP TOOL on compliance to the standards for Fairmode Composite

Praktikum: Paralleles Programmieren für Geowissenschaftler · Dr. Hermann-J. Lenhart hermann.lenhart@zmaw.de Praktikum: Paralleles Programmieren für Geowissenschaftler Prof. Thomas

Traffic emissions of PM10 and NOx a comparison between ...fairmode.jrc.ec.europa.eu/document/fairmode/event/presentation/... · Traffic emissions of PM10 and NO x in Stockholm –a

WG3 intercomparison: main outcomes and implications for ...fairmode.jrc.ec.europa.eu/document/fairmode/event/presentation/... · sources to apportion plus base case Mass conservation

Guidance in the use of models for European air quality directive …fairmode.jrc.ec.europa.eu/document/fairmode/download/... · 2018. 11. 13. · Guidance on the use of models for

Review of the methodologies for the quantification of …fairmode.jrc.ec.europa.eu/document/fairmode/event/presentation/... · Review of the methodologies for the quantification of

Spatial source apportionment Is there any methodology …fairmode.jrc.ec.europa.eu/document/fairmode/event/presentation/... · Nicola Pepe, Guido Pirovano, Alessandra Balzarini, Maurizio

Seminar Softwareentwicklung in der Wissenschaft · PDF fileMeteorologie, Ozeanographie oder andere ZMAW Institute möglich, nach Bedarf . ... SS 2013 - Seminar . Seite 12 “Softwareentwicklung

WG1: SUMMARY & RECOMMENDATIONS FOR THE NEXT …fairmode.jrc.ec.europa.eu/document/fairmode/event/presentation/... · » Target diagram attached to a map » Labeling of the maps »

Preliminary results of the source apportionment …fairmode.jrc.ec.europa.eu/document/fairmode/event/...2016/06/27 · 61 ammonium nitrate 62 ammonium sulphate 66 deicing salt 70