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| Titel |
Atmospheric column-averaged mole fractions of carbon dioxide at 53 aircraft measurement sites |
| VerfasserIn |
Y. Miyamoto, M. Inoue, I. Morino, O. Uchino, T. Yokota, T. Machida, Y. Sawa, H. Matsueda, C. Sweeney, P. P. Tans, A. E. Andrews, P. K. Patra |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 10 ; Nr. 13, no. 10 (2013-05-27), S.5265-5275 |
| Datensatznummer |
250018670
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| Publikation (Nr.) |
 copernicus.org/acp-13-5265-2013.pdf |
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| Zusammenfassung |
| Atmospheric column-averaged mole fractions of carbon dioxide (XCO2) at
53 locations around the world were derived from aircraft measurements
covering the altitude range of about 1–10 km. We used CO2 vertical
profile measurements from three major carbon cycle programs, a global
climatological data set of air number density profiles and tropopause height
for calculating XCO2 for the period of 2007–2009. Vertical profiles of
the CO2 mixing ratio are complemented by tall tower data up to 400 m
from the earth's surface and by simulated profiles in the stratosphere from
a chemistry-transport model. The amplitude of the seasonal cycle of
calculated XCO2 values shows clear latitudinal dependence, and the
amplitude decreases from about 10 ppm at high latitudes in the Northern
Hemisphere to at most 2 ppm in the tropics and the Southern Hemisphere. The
uncertainties of XCO2 were estimated from assumptions about CO2
profiles for each flight. Typically, uncertainties were less than 1 ppm;
thus, this data set is within the level of uncertainty needed for primary
validation of XCO2 measurements by the Greenhouse gases Observing
SATellite (GOSAT) and by future satellite missions for monitoring greenhouse
gases. |
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