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Global Atmosphere Watch Expert meeting

on Nitrogen Oxides

University of York, UK

12-13 April 2016

 

Objective

The objective of the NOx workshop is to review the status of the GAW Network for NOx measurements, data quality objectives, progress with the measurement techniques and standards, and development of the measurement guidance. The workshop followed up on the recommendations made in relation to this focal area development at the NOx  workshop in 2009.

Group photo NOx workshop

Agenda with presentations

Tuesday, 12 April

9:00-9:05

Welcome

James Lee, University of York

9:05-9:20

Introduction and workshop objectives

Christian Plass-Duelmer/Oksana Tarasova

 

Session 1: Overview of the Observational network and Requirements

Chair: Oksana Tarasova

9:20 – 9:35

Measurements of NOx and NOy at Hohenpeissenberg

Dagmar Kubistin,

DWD

9:35 – 9:50

NOx observations in Artic

Detlev Helmig,

INSTAAR

9:50 – 10:05

NOx observations at Cape Verde

Chris Reed,

University of York

10:05 – 10:20

NOx observations at Auchencorth Moss, near Edinburgh, UK

Mhairi Coyle

Center for Ecology and Hydrology, NERC, UK

10:20- 10:35

NOx measurements at Puy de Dome

Aurélie Colomb

LaMP/OPGC (Clermont Ferrand, France) via telecon 

10:35 – 11 :00

Coffee break

 

11 :00 – 11 :15

MAX-DOAS observations of NO2 in NDACC: status and perspectives

Francois Hendrick

 Royal Belgian Institute for Space Aeronomy

11:15 – 11:30

Experiences of measuring NOxy at Cape Grim Australia

Ian Galbally,

CSIRO

11:30-11:45

Twenty years of ambient observations of nitrogen oxides and specified hydrocarbons in air masses dominated by traffic emissions in Germany

Christian Ehlers,

FZ-Julich

11:45 -12:30

Discussion (1):

Application for aircraft measurements:

Recommendations, current issues

Leads:

Stephanne Bauguitte

James Lee

12:30-13:30

Lunch break

 

13:30 -14:10

Discussion (2):

  • Recommendations for the network development
  • Review of the Data Quality Objectives

Lead:

Christian Plass-Duelmer

 

Session 2 Measurement techniques

Chair: James Lee

14:10 – 14:25

Measuring NOx with multiple instruments – the more information, the bigger the uncertainty?

Robert Holla,

DWD

14:25 – 14:40

New direct NO2 measurements (e.g. CAPS, LIF, QCL)

Martin Steinbacher, Empa and

James Lee, University of York

14:40-14:55

AQD BLCs

James Lee / Chris Reed

14:55-15:30

Coffee break

 

15:30-16:00

Use of the small sensors for NOx measurements

Martin Steinbacher

Stefan Gilge

James Lee

16:00-16:30

Discussions (3):

NO measurements:

What is the current state of the technology? 

Issues round instrument operation, especially for low level measurements.

Different manufacturers – best recommended for remote or continental measurements

Lead: Chris Reed

16:30-17:00

Discussions (4):

NO2 measurements:

Photolytic converters, what is the current state of the technology, what type should we be using, what are the interference issues?

Lead: Chris Reed

17:00-17:30

Discussion (5):

Role of the small sensors in the GAW network

Lead: Martin Steinbacher

Stefan Gilge

James Lee

17:30

Adjourn

 

 

Wednesday, 13 April

 

Session 3 Gas standards and calibration

Chair:

Martin Steinbacher

9:00-9:15

Underpinning measurements of NOX/ Status of the CCL for NO

Paul Brewer,

NPL

9:15-9:35

Discussion (6):

Zero air generation - Current state of the technology

Lead: Paul Brewer

 

Session 4 Quality Assurance

Chair:

Martin Steinbacher

9:35 -9:55

Status of the MG NOx

Christian Plass-Duelmer and Stefan Gilge

9:55-10:10

Update on the activities of the WCC-NOx

Franz Roher (video) and Christian Ehlers

10:10-10:30

Discussion (7):

NOx measurement guidelines: follow up

Lead:

Christian Plass-Duelmer and Stefan Gilge

10:30-11:00

Coffee break

 

11:00-11:30

Finalization of the action list

Lead:  Alastair  Lewis

11:30

Final remarks and meeting closure

 

 


 
 
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