Analysis of the observations of CO2 concentrations in the ambient air at the

Peterhof station

Stefani Foka Dept. of Atmospheric Physics, SPbU

In 2000 the growth rate of CO2 achieved 1.7% per year (or 2.2 ppm/per year).

CO2 growth rate in the atmosphere

In the 19th century CO2 concentrations in the atmosphere started to increase.

Global Greenhouse Gas Reference Network

Outline

-to estimate temporal variations of CO2 concentration observed at the Peterhof station in 2013;

-to compare our results with independent measurements and modeling results;

- to analyze reasons which could be responsible for the variations of CO2 concentration.

Location of the measurement site

Location: 59.88°N, 29.83°E, 20m asl.Peterhof is the suburb of Saint-Petersburg (~35 km westward from the city center).

Gas analyzer for CO2 monitoring

LGR greenhouse gas analyzer (CO2, CH4, H2O): off-axis integrated cavity output spectroscopy technique LGR performs measurements every 20 seconds.

Measurement error: 100 ppb

Annual variation of CO2 in Spb in 2013

min values of CO2, ppm

mean values of CO2, ppm

max values of CO2, ppm

CO

2, p

pm

month

Russian stations that measure CO2

71°41′13″ N 128°52′09″ E

Tiksi

69°09′51″ N35°08′26″ E

Teriberka

59.88°N, 29.83°E, 20m asl

Peterhoff

Peterhof is the suburb of Saint-Petersburg (~35 km westward from the city center).

Annual variation of CO2 with values from 16 to 18 hoursCO

2, p

pm

Diurnal variations of CO2 in SPb in 2013CO

2, p

pm

Time

CO2,

ppm

Concentration of CO2 in February

No wind

North-east,1-3 m/s

Temperature inversion

Temperature inversion

West, north-west, day: 2-5 m/s, night: 6-12 m/s

hh21 February

20 February 22-28 February

Temperature profile in Spb

0

5000

10000

15000

20000

25000

Temperature profile in Spb

1000

2000

3000

4000

5000

0

Temperature inversion

Hybrid Single-Particle Lagrangian Integrated Trajectory —(HYSPLIT) Model

The HYSPLIT model is a complete system for computing simple air parcel trajectories to complex dispersion and deposition simulations. The intial development was a result of a joint effort between NOAA and Australia's Bureau of Meteorology.

Dispersion of polluted air from Saint-Petersburg (21.02.2013)

0 – 4 am. East, north-east winds 1 – 5 pm. Calm

5 – 9 pm. Calm, then west winds

Summary