The NOx plotter by Forschungszentrum Jülich uses hourly values of nitrogen oxide
concentrations (NO: nitrogen monoxide, and NO₂: nitrogen dioxide) from the German air quality monitoring
network. You can choose any station from this network and the web tool will calculate if the legal air
quality threshold of 40 µg/m³ (annual mean value) has been exceeded, and by how much the emissions of
nitrogen oxides must be reduced to meet the target value. The expert mode displays the data curves which are
used for this calculation. To get a simpler graphical display of the results, please change to the
standard mode.
The legal limit value of 40 µg/m³ NO₂ as annual mean is only exceeded at stations with a
road traffic pollution signature. At these sites, nitrogen oxide emissions are dominated by road traffic
and in particular by diesel combustion in passenger and transport vehicles. Therefore it is only
possible to reduce NO₂ concentrations at these locations by reducing vehicle traffic emissions. It is
not straightforward to estimate the required emission reduction based on the measured NO₂ concentration
exceedance, however. Vehicle exhaust contains both NO and NO₂. Typically, the NO₂ fraction in the
exhaust is only ~15% while the remaining NOx is emitted as
NO. NO, NO₂, and ozone react with each other in an atmospheric chemical reaction cycle. Within minutes, NO
reacts with ozone from the background air to form NO₂. During daytime NO₂ can photolytically dissociate to
yield the NO and ozone back (see for example
Tropospheric ozone).
One consequence of this chemical reaction cycle is the non-linearity of the relation between
the emitted NOx and the measured NO₂ concentration. The more NO is contained in the air, the
lower is the fraction of this NO that is converted to NO₂. This results in the necessity to apply
over-proportional reductions of the NOx emissions, i.e. the higher the NO₂ exceedance, the
more extra NOx emissions have to be avoided. The exact value can be obtained through the
Jülich NOx calculator. It works by plotting the hourly measurements of NO₂ versus the sum of
the NO and NO₂ concentrations. These curves are shown in the expert mode of the NOx plotter.
In case you cannot find your favorite measurement location in the station dropdown list it is very
likely that NO₂ concentrations at this station are measured through laboratory analysis of filter
samples. Since the NOx plotter works with hourly data of NO and NO₂, it cannot make use of
such measurements.
Usage:
Just enter the name of a city or a street address in the location field and select a
measurement station near you. Click on “Create Plots” and you will obtain the graphical
results.
Entered in the Commercial Register of the District Court of Düren, Germany: No. HR B 3498
Value Added Tax ID No. in accordance with § 27 a of the German VAT Law (Umsatzsteuergesetz): DE
122624631
Tax No.: 213/5700/0033
Board of Directors:
Prof. Dr.-Ing. Wolfgang Marquardt (Chairman of the Board of Directors)
Karsten Beneke (Vice-Chairman)
Prof. Dr. Sebastian M. Schmidt
Prof. Dr. Harald Bolt
Supervisory Board:
Ministerialdirektor Dr. Karl Eugen Huthmacher
Contact:
General inquiries: +49 2461 61-0
General fax no.: +49 2461 61-8100
Web page concept and design: Dr. Martin Schultz and Jan Vogelsang
Realisation: Jan Vogelsang, Andreas Walbröl and Dr. Martin Schultz
Text content: Dr. Martin Schultz, Dr. Franz Rohrer and Tobias Schlößer
Data: Umweltbundesamt Dessau
Copyright and all other rights concerning the website of Forschungszentrum Jülich are held by
Forschungszentrum Jülich GmbH. Use of the information contained on the website, including excerpts, is
permitted for educational, scientific or private purposes, provided the source is quoted (unless
otherwise
expressly stated on the respective website). Use for commercial purposes is not permitted unless
explicit
permission has been granted by Forschungszentrum Jülich.
Contents of the Website of Forschungszentrum Jülich
The website of Forschungszentrum Jülich has been compiled with due diligence. However, Forschungszentrum
Jülich
neither guarantees nor accepts liability for the information being up-to-date, complete or accurate.
Links to External Websites
The website of Forschungszentrum Jülich contains links to external third-party websites. These links to
third-party sites do not imply approval of their contents. Forschungszentrum Jülich has no influence on
the
current or future contents of these sites. We therefore accept no liability for the accessibility or
contents of such websites and no liability for damages that may arise as a result of the use of such
content.
Last updated: 12. March 2019
Stickoxid-Rechner
Data protection and privacy policy
We are delighted that you make use of the Stickoxid-Rechner web interface
www.stickoxid-rechner.de
hosted by the Jülich Supercomputing Centre (JSC) at Forschungszentrum Jülich, Germany.
We are committed to handling your personal data with care and we promise to take all
reasonable measures to prevent misuse of your personal data.
According to the General Data Protection Regulation (GDPR) of the European Union we are
obliged to inform you about our use of any personal information which you provide to us and
about your rights to inspect this information or request corrections, replacement, or deletion
of this information. This data protection statement aims at providing you with all the
information that is necessary so that you understand what we do with your data and that you
can act according to the provisions set out by the GDPR.
1. Responsibilities:
The responsible web service provider of www.stickoxid-rechner.de is:
Dr. Martin Schultz
Jülich Supercomputing Centre
Forschungszentrum Jülich GmbH
Wilhelm-Johnen-Straße
52428 Jülich
Germany
email: m.schultz_at_fz-juelich.de
The data protection officer at Forschungszentrum Jülich is:
Frank Rinkens
Forschungszentrum Jülich GmbH
Wilhelm-Johnen-Straße
52428 Jülich
Germany
email: DSB@fz-juelich.de
2. Acquisition and use of personal data
www.stickoxid-rechner.de will acquire and store personalized data from its users in the following
circumstances:
The web server(s) will record and log IP addresses, access times, and some rudimentary information
about the operations performed for any access to the web pages.
This information may be evaluated to infer anonymous usage statistics and optimize the service
performance (including the possibility to block access in case of misuse). No attempt will be made
to
correlate this type of usage data with other personal data except if you specifically ask us to do
so
in order to better resolve any problems with accessing our services or retrieving data from them.
Cookies: some of our web services use cookies to save information about your personal browsing
preferences
such as a default world region, filter settings, etc. You can manage your cookies with your internet
browser.
We cannot guarantee that it will be possible to use www.stickoxid-rechner.de without consenting to
the
storage of cookies. We
will make no attempt to evaluate cookie data, but it may happen that our services modify the
information
contained
in cookies without notice, for example if new features are added or if features are modified or
removed.
3. Sharing of personal data
We have no intention of sharing your personal data with anyone. In the unlikely event that this may be
required, your personal data will only be shared with others if you explicitly consent to this
transfer.
We may evaluate your personal data to derive usage statistics etc., but such statistics will only be
published in anonymous form.
4. Legal basis for data processing
The processing operations is based on Article 6(1) lit. f GDPR. This legal
basis is used for processing operations when processing is necessary for the
purposes of the legitimate interests pursued by our company. A legitimate
interest could be assumed if the data subject is an employee, client or
guest of the controller.
5. Deletion or blocking of data
We adhere to the principles of data avoidance and data economy. Therefore,
we only store your personal data for as long as is necessary to achieve the
purposes mentioned here or as provided for by the various storage periods
provided for by law. After discontinuation of the respective purpose or
expiration of these deadlines, the corresponding data will be routinely and
in accordance with the statutory provisions blocked or deleted.
6. User rights
As outlined in the GDPR you have the right to request information about the personal data we
have stored about you and the use we make of this data at any time. You also have the right to request
corrections, enhancements, or deletion of your personal data. We will respect any such request
unless it would be in conflict with other regulations (which is rather unlikely as far as we can tell).
Of course you can also revoke any consent for using your data in any of the ways outlined above or
for sharing your data at any time, and we will act upon such requests without undue delay.
If you are under the impression that we don't handle your personal data with due diligence or
if you wish to complain about any matters concerning your data privacy in connection to our
services, you may contact the service provider, the data protection officer, or the
Landesbeauftragte für Datenschutz und Informationsfreiheit (email:
poststelle{at}ldi.nrw{dot}de).
7. Validity of this data protection document
The terms and conditions set out in this data protection statement remain in effect until
this declaration is modified. Any modifications which may affect your rights, i.e. any modifications
beyond simple error corrections or clarifications, will be communicated on the web service as
special alert.