TY - JOUR

T1 - Determining Both Tropospheric and Stratospheric СО2 Contents Using a Ground-Based IR Spectroscopic Method

AU - Timofeyev, Yu. M.

AU - Nerobelov, G. M.

AU - Poberovskii, A. V.

AU - Filippov, N. N.

N1 - Publisher Copyright: © 2021, Pleiades Publishing, Ltd.

PY - 2021/5

Y1 - 2021/5

N2 - Abstract: Results obtained from ground-based high spectral resolution measurements of solar IR radiation absorption spectra are analyzed. These measurements have been carried out in Peterhof for different ranges of electromagnetic waves to determine the atmospheric total content of СО 2 and its contents in the two atmospheric layers—the troposphere and stratosphere. Two spectral schemes to measure solar spectra within ranges of 2600 and 3100–3300 cm –1 are chosen based on an analysis of errors in measurements using different spectral schemes and comparisons with independent measurements and simulation data. Time variations in the tropospheric and stratospheric contents of СО 2 for the 2018–2019 period are studied. Within this period, the ХСО 2 values in the troposphere mostly exceed those in the stratosphere, and such an excess reached 5–10 ppm. The reverse situation is observed in summer and early fall, when the ХСО 2 values in the stratosphere exceed those in the troposphere, which is associated with photosynthesis processes (absorption of СО 2 by vegetation in the troposphere). Comparisons of ground-based measurement results with CAMS simulation data and satellite OCO-2 and ACE data show a good agreement for the total content of СО 2 and its tropospheric and stratospheric contents. The errors are within 1% if systematic discrepancies are excluded.

AB - Abstract: Results obtained from ground-based high spectral resolution measurements of solar IR radiation absorption spectra are analyzed. These measurements have been carried out in Peterhof for different ranges of electromagnetic waves to determine the atmospheric total content of СО 2 and its contents in the two atmospheric layers—the troposphere and stratosphere. Two spectral schemes to measure solar spectra within ranges of 2600 and 3100–3300 cm –1 are chosen based on an analysis of errors in measurements using different spectral schemes and comparisons with independent measurements and simulation data. Time variations in the tropospheric and stratospheric contents of СО 2 for the 2018–2019 period are studied. Within this period, the ХСО 2 values in the troposphere mostly exceed those in the stratosphere, and such an excess reached 5–10 ppm. The reverse situation is observed in summer and early fall, when the ХСО 2 values in the stratosphere exceed those in the troposphere, which is associated with photosynthesis processes (absorption of СО 2 by vegetation in the troposphere). Comparisons of ground-based measurement results with CAMS simulation data and satellite OCO-2 and ACE data show a good agreement for the total content of СО 2 and its tropospheric and stratospheric contents. The errors are within 1% if systematic discrepancies are excluded.

KW - carbon dioxide

KW - climate

KW - greenhouse gases

KW - ground-based IR spectroscopic method

KW - satellite observations

KW - validation

KW - ACE-FTS

KW - INFORMATION

KW - VERTICAL-DISTRIBUTION

KW - RESOLUTION

KW - CARBON-DIOXIDE

KW - RETRIEVAL

UR - http://www.scopus.com/inward/record.url?scp=85112119747&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/6417a27e-19b9-35a7-9728-9622d0f2b286/

U2 - 10.1134/S0001433821020110

DO - 10.1134/S0001433821020110

M3 - Article

VL - 57

SP - 286

EP - 296

JO - Izvestiya, Atmospheric and Oceanic Physics

JF - Izvestiya, Atmospheric and Oceanic Physics

SN - 0001-4338

IS - 3

ER -