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| Titel |
Comparisons of ground-based total column CO2 measurements and global transport model simulations |
| VerfasserIn |
Sabrina Niebling, Ina Burjack, Dietrich Feist |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250083451
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| Zusammenfassung |
| Anthropogenic emissions of greenhouse gases like CO2 and CH4 are important drivers of
changes in radiative forcing and therefore climate changes. However, there remain still large
uncertainties concerning the estimates of source and sink distributions of these gases to and
from the atmosphere and more measurements are needed to adequately assess the
problem.
In 2004, the Total Carbon Column Observing Network (TCCON) was formed.
It consists of ground-based Fourier Transform Spectrometer (FTS) systems all
around the world that provide high-resolution near-infrared spectral data . From
these spectra, it is possible to retrieve total columns of CO2, CH4, CO and several
other trace gases with very high precsion. Currently, TCCON has 20 operational
stations.
Here, we present comparisons of timeseries of CO2 measured at different TCCON
stations with modeled data gained by using the global transport model TM3. The analysis
includes statistical parameters like biases, variability and correlation coefficients for both
timeseries and their difference over the course of one year.
In addition, we show footprints of the different TCCON stations to interpret the results.
The footprint is defined as the typical area where air parcels that are observed by the station
originate. The calculations were done by adapting the adjoint of the TM3 model to calculate
total columns. |
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