 |
| Titel |
The Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) FTS: Results From the 2012/13 Alaska Campaigns |
| VerfasserIn |
Thomas P. Kurosu, Charles E. Miller, Stephen J. Dinardo |
| Konferenz |
EGU General Assembly 2014
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250099973
|
| Publikation (Nr.) |
 EGU/EGU2014-15833.pdf |
|
|
|
|
|
| Zusammenfassung |
| The Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) is an aircraft-based
Earth Venture 1 mission to study the carbon balance of the Alaskan Arctic ecosystem, with a
particular focus on carbon release from melting permafrost. Operating from its base in
Fairbanks, AK, the CARVE aircraft covers a range of principle flight paths in the
Alaskan interior, the Yukon River valley, and the northern Alaska coast around Barrow
and Dead Horse. Flight paths are chosen to maximize ecosystem variability and
cover burn-recovery/regrowth sequences. CARVE observations cover the Arctic
Spring/Summer/Fall seasons, with multiple flights per season and principle flight path.
Science operations started in May 2012 and are currently envisaged to continue until
2015.
The CARVE suite of instruments includes flask measurements, in situ gas analyzers for
CO2, CH4 and CO observations, and a three-band polarizing Fourier Transform Spectrometer
(FTS) for column measurements of CO2, CH4, CO, their interfering species (e.g., H2O), and
O2. The FTS covers the spectral regions of 4,200-4,900 cm-1, 5,800-6,400 cm-1, and
12,900-13,200 cm-1, with a spectral resolution of 0.2 cm-1. Aircraft-based FTS science
observations in Alaska have been performed since 23-05-2012. First-version data products
from all CARVE instruments derived from observations during the 2012 campaign were
publicly released earlier in 2013.
The FTS has performed well during flight conditions, particularly with respect to
vibration damping. Outstanding challenges include the need for improved spectral and
radiometric calibration, as well as compensating for low signal-to-noise spectra acquired
under Alaskan flight conditions. We present results from FTS column observations of CO2,
CH4, and CO, observed during the 2012 and 2013 campaigns, including preliminary
comparisons of CARVE FTS measurements with satellite observations of CO2 from
TANSO/GOSAT and CO from MOPITT. |
|
|
|
|
|
|