Mastodawn

The article about quantifying natural #CO2 emissions from mofettes at the #Starzach site in Germany with a low-cost sensor network is published now at @plosclimate:

https://doi.org/10.1371/journal.pclm.0000741

#Python #Arduino #PlatformIO #GaussianPuff #divergenceTeorem #globalWarming

Quantification of natural CO2 emissions from mofettes using a low-cost sensor network at the Starzach site in South-West Germany

We present a top-down method to derive CO2 emissions from mofettes, using only point measurement time series at irregular locations. Notably, no wind vector information is needed, as gas transport is derived from cross-correlations between sensor stations and subsequently integrated using Gauss’ divergence theorem. The method is applied to an existing low-cost sensor network at the Starzach site near the Black Forest in Germany, for which no comprehensive estimate of the total emissions exists yet. For validation, we use previous bottom-up measurements of individual mofette degassing and a Gaussian puff approach. Over a period of one and a half months around August 2022, we determine an average CO2 emission rate of 3266 kg d−1±42% over a 400 m2 area. This result is larger than expected and suggests that diffuse degassing plays a more important role at site than previously assumed. The method could also be applied for real-time monitoring of leaky CCS sites, for which the Starzach site is a natural analog.

🛩AG Umweltphysik Uni Tübingen Nov 7

We need this 🦆 pelican for our measurement campaigns!

#Petzi #RasmusKlump

🛩AG Umweltphysik Uni Tübingen Sep 17

Yann Büchau

Sep 17

Once you are done fighting it, documents typeset with #TexLaTeX are pretty damn rad! 🚀

The automations you can put into place to help you focus on the actual writing are really something else:

- different modes for notes, submission, and publishing
- acronym or physical unit expansion only upon first mention
- auto-generated glossary or symbol list
- and of course a ton of (back)references

Paired with a good PDF reader (such as the one built into #Zotero), the backreferences ROCK! 🤙

#PhDLife

🛩AG Umweltphysik Uni Tübingen Sep 15

David Adler Sep 14

Wie viele Umdrehung eines Windrads braucht es, um den Strom zu produzieren, mit dem ein E-Auto ganz Deutschland von Nord nach Süd (Flensburg bis Oberstdorf) durchfahren kann? #EMobilität #Windenergie

Ihr seid alle viel besser informiert als ich. 20 sind es grob, wenn man 8kWh pro Umdrehung bei 16kWh Verbrauch pro 100km annimmt, wie es die Sendung mit der Maus tut: https://m.youtube.com/watch?v=SjOMHtewpvc.

20

45.2%

200

31%

2.000

21.4%

20.000

2.4%

Poll ended at Oct 14 at 5:22pm.

Wie viel Energie entsteht bei einer Windradumdrehung? | Die Maus | WDR

YouTube

🛩AG Umweltphysik Uni Tübingen Sep 8

EarthArXiv Sep 8

Quantification of natural CO2 emissions from mofettes using a low-cost sensor network at the Starzach site in south-west Germany
https://doi.org/10.31223/X51J07 #AtmosphericSciences #EnvironmentalMonitoring #Meteorology #Co2 #Degassing #Mofettes #Low-cost #SensorNetwork #Monitoring

Quantification of natural CO2 emissions from mofettes using a low-cost sensor network at the Starzach site in south-west Germany

🛩AG Umweltphysik Uni Tübingen Sep 5

EarthArXiv Sep 5

Quantification of natural CO2 emissions from mofettes using a low-cost sensor network at the Starzach site in south-west Germany
https://doi.org/10141 #AtmosphericSciences #EnvironmentalMonitoring #Meteorology #Co2 #Degassing #Mofettes #Low-cost #SensorNetwork #Monitoring

🛩AG Umweltphysik Uni Tübingen Sep 5

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Yann Büchau

Sep 5

The results are that the investigated mofette field in #Starzach emits roughly three metric tonnes of CO2 per day (3000kg/d).

To put this into perspective: This 20x20m mofette field fills daily:

- a smaller hot air balloon with CO2 gas🎈
- or a small car (3m³) filled with liquid CO2 🚗
- or two #Minecraft blocks (2m³) of dry ice (solid CO2) 🧊🧊

😮 And this study only looks at a couple of mofettes, there are more abandoned wells in the area...

🧵

🛩AG Umweltphysik Uni Tübingen Sep 5

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Yann Büchau

Sep 5

In this¹ paper, I present a method to derive #CO2 movements and total emissions from cross-correlations between a bunch of CO2 stations (black arrows) at the #Starzach site near #Tübingen in south-western Germany. This site is known for its natural CO2 emissions from mofettes - holes in the ground where CO2 is emitted, sometimes as little geysers when water is involved.

More on the site in my previous publications²³.

¹https://doi.org/10.31223/X51J07
²https://doi.org/10.1127/metz/2022/1125
³https://doi.org/10.1007/s10661-023-12114-8

🧵

🛩AG Umweltphysik Uni Tübingen Aug 16

Yann Büchau

Aug 16

Has anyone here published with @plosclimate?

My manuscript is slowly approaching submission state. It is a very technical paper about the essence of my #PhD: quantifying natural #CO2 emissions at the #Starzach site (Turns out, it's a few tonnes per day! 🤯)

Reading through the existing #PLOSClimate papers, mine seems a little too mathematical, but I guess it's fine? Typically one would submit this to AMT or JTECH but PLOS is a nonprofit, which I want to support.

#meteorology #PhDLife