EGU22-9018
https://doi.org/10.5194/egusphere-egu22-9018
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Analysis of Saint-Petersburg`s CO2 anthropogenic emissions estimation by differential spectroscopy method

Yury Timofeyev1, Georgy Nerobelov1,2,3, and Anatoliy Poberovskiy1
Yury Timofeyev et al.
  • 1Saint-Petersburg State University, Atmospheric Physics Department, Saint-Petersburg, Russian Federation (y.timofeev@spbu.ru)
  • 2Scientific Research Centre for Ecological Safety of the Russian Academy of Sciences, Saint-Petersburg, Russia
  • 3Russian State Hydrometeorological University, Saint-Petersburg, Russia

Needs in obtaining independent and high-quality information on anthropogenic emissions of important for climate and ecology gases led to the development of spectroscopic (ground-based and satellite) methods of the emission determination. This challenge can be reduced to two sequential inverse problems - the inverse problem of atmospheric optics and atmospheric transport. Here we studied the merits and disadvantages of differential IR methods for the emissions estimation. Also we investigated the main factors determining their errors such as:

  • Quality and number of the observations of spatio-temporal distribution of gases studied
  • Capabilities of the numerical models to simulate atmospheric transport
  • Spatial and temporal resolutions of emissions estimated
  • etc.

In the current study integral anthropogenic CO2 emissions of Saint-Petersburg were determined using observation data of the city`s anthropogenic contribution to the gas content. In addition we implemented a new approach of inverse problem solution which was based on a priori CO2 emission data and scale coefficients applied only to the city`s areas covered by the observations. Integral anthropogenic CO2 emissions obtained were in a range from approximately 52 to 72 Mt/year. These emissions are significantly higher than inventory-based estimates which constitute ⁓30 Mt/year. Nevertheless, the minimal value of the range (~52 Mt/year) is lower by ~21% than emissions which we calculated earlier also using observations (~65 Mt/year).

How to cite: Timofeyev, Y., Nerobelov, G., and Poberovskiy, A.: Analysis of Saint-Petersburg`s CO2 anthropogenic emissions estimation by differential spectroscopy method, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-9018, https://doi.org/10.5194/egusphere-egu22-9018, 2022.