About CTT

Municipal GHG emission data repositories are expensive and time-consuming to build, maintain, validate, and evaluate. The absence of detailed cost/benefit calculations and measurements make it difficult to understand results of mitigation strategies. The Carbon Track and Trace (CTT) project aims to develop an automated system for greenhouse gas (GHG) emissions monitoring and reporting. The system will enable a municipality to automatically log and analyse calibrated measurements of their direct GHG emissions. This data will for the first time allow municipalities to develop evidence-based policy for mitigation strategies, linking specific actions and strategies to measured reductions unlocking the potential for significant increases in private capital investments in GHG emission reduction measures.


An IoT Sensor Network

Realtime measuring of greenhouse gas levels can be achieved by using inexpensive, open-source hardware.



By using novel communication technologies like LoRaWAN, we make the sensor network scalable.


Cloud Integration

The measurements from the IoT sensor network are relayed from gateways to an open cloud platform, allowing for easy integration with other applications.


Data Analysis

Tailored data analysis will integrate sensor measurements with other open data sources to generate new insights and city-level emission overviews.



Analysis results are visualized to different stakeholders and also made available for further processing.

End users

Politicians and Planners

CTT gives politicians and planners more accurate real-time greenhouse gas emissions measurements, facilitating faster feedback loops between action and quantifiable impact.


Giving citizens access to real time air quality maps of their city give them the opportunity to influence their local community to become more environment friendly, choose a 'green route' to work and choose when its best to go for a run.


The CTT ecosystem gives researchers an open source, low-cost platform for field measurements of greenhouse gas emissions in buildings, energy, transport, and waste, and will lower the threshold for researchers to engage with local emissions data.


NTNU and AIAScience present the CTT project at the pavilion of Innovation Norway at the Smart City Expo Barcelona 2016 on 15.-17. November 2016 at Barcelona Fira.

The Innovation Norway pavilion was part of a larger pavilion area of the Nordic countries of Denmark, Finland, and Norway.
DTU was also present at the EERA (European Energy Research Alliance) booth.

Read more about it here

Post date: 2016-11-21 10:53

Together with the Libelium hardware provider, CTT has developed a case study within Libelium's series to showcase the use for environmental measuring of emissions.

Read the case study here:
Enhancing environmental control and reducing emissions in Nordic Smart Cities


Post date: 2016-11-21 10:49

Our project partner Trondheim Kommune hosted a Climathon in Trondheim together with NTNU and Climate-KIC. The topic was very timely and relevant about the "Zero Emission Knowledge Axis" of Trondheim. Some project partners of CTT were members of the jury.

Fredrik Anthonisen from CTT was invited to give an overview of the project and share findings and inspiration with the participants.

Read more about the Climathon.

Post date: 2016-10-30 19:38

CTT and the larger NTNU Smart Cities approaches were presented in an invited presentation at the Local Renewables Conference 2016 in Freiburg, organized by ICLEI. Dirk Ahlers presented the CTT approach in the session on Air Quality and Smart Cities sensor systems  for low pollutant infrastructures on 27.Oct 2016.

'Low cost #sensors,open systems & bigdata analytics in combination is the way forward.'

The presentation is available: CTT 2.0: Climate-Smart Cities
As well as the conference overview.

Post date: 2016-10-29 00:00
An overview paper of the CTT technical infrastructure will be presented at the Norwegian Informatics Conference (NIK2016)
Dirk Ahlers, Patrick Driscoll, Frank Alexander Kraemer, Fredrik Anthonisen, John Krogstie

Cities are main drivers for climate change mitigation and emission reduction today. However, in many cases they lack reliable baselines of emissions to validate current developments over time, assess the impact of their projects, and prioritize investments and actions. They also need better data on a small geospatial and temporal scale to really understand local emissions. This paper describes the rationale and the design of the Carbon Track and Trace project (CTT) that aims to develop an automated system for greenhouse gas (GHG) emissions monitoring through a low-cost city-level sensor network. The system is based on a flexible architecture incorporating open source sensor platforms, an Internet-of-Things wireless backbone, and extensive data analytics. We describe concept, architecture, and deployment as well as initial results.

Final version at

Post date: 2016-10-24 12:31

Registration deadline 21.Oct.2016

Our project partner Trondheim Kommune is hosting a Climathon in October. While this is not a CTT event, the questions are very relevant and related and we hope for a large turnout:

Trondheim Municipality, NTNU and Technoport join forces to host a Climathon on October 28th at DIGS in Trondheim. During a Climathon event, each city brings up their local climate challenges and invite the whole city to find ideas and development them within 24 hours. Trondheim is the northernmost city in this global movement which 121 cities all over the world participate in. CO2-emissions from the transport sector account for approximately 50 % of the total CO2-emissions in Trondheim. The city needs measureable, integrated and engaging solutions to reduce the CO2-emissions from the transport sector. Through the Climathon Trondheim, we’d like to engage students, scientists, entrepreneurs and citizens from different backgrounds to co-design innovative and future-oriented solutions and business cases for “Zero Emission Knowledge Axis” and the city beyond.

Read more and register here.

Post date: 2016-10-19 15:45

CTT was invited to talk about Impact Assessment for Climate-Smart Cities based on measurements. Dirk Ahlers presented the climate finance angle of CTT and participated in a panel discussion on climate finance at the at the /Ciudades Bajas en Carbono in Medellin, Colombia.

Slides are available: Cities need insight to drive mitigation

Post date: 2016-10-10 00:00

The smart city event NordicEdge2016 takes place in Stavanger 06.-07.10.2016 and CTT is participating with a booth and a presentation at the Centre Court in the Stavanger Forum.

Come and meet CTT and NTNU at booth 184 at the Expo and join our presentation in the session Public Solutions from 13:30-14:45on Friday, 7th.Oct.2016 on the topic Climate-Smart Cities.

More details at:

Have a look at the slides of the talk Climate-Smart Cities - CTT

Post date: 2016-10-04 15:15

We have deployed several sensors in Vejle, Denmark and the we are happy to see that we are receiving attention because of it.

The Danish website of Association of municipal IT managers ( recently posted an article about CTT on their website. Click here to read the Danish article.

Post date: 2016-09-15 13:27

On 26th and 27th of August, CTT was represented at the Maker Faire exhibition in Trondheim, Norway.

The stand demonstrated the technical side of the project, and there was a lot of interest from the visitors.

Maker Faire is a part of Trondheim Playground. To read about the Playground, visit


Post date: 2016-09-03 20:24