 |
| Titel |
Regional carbon dioxide and energy fluxes from airborne observations using flight-path segmentation based on landscape characteristics |
| VerfasserIn |
O. S. Vellinga, B. Gioli, J. A. Elbers, A. A. M. Holtslag, P. Kabat, R. W. A. Hutjes |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 7, no. 4 ; Nr. 7, no. 4 (2010-04-21), S.1307-1321 |
| Datensatznummer |
250004669
|
| Publikation (Nr.) |
 copernicus.org/bg-7-1307-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| This paper presents an analysis of regional fluxes obtained with a small
aircraft over heterogeneous terrain in the south-west of France, during the
large scale field experiment CERES'07. We use a method combining variable
flight-path segmentation with basic airborne footprint analysis. The
segmentation is based on topography, land use and soil type, using a.o.
satellite imagery and digital maps. The segments are delineated using an
average footprint length, based on all flights, and segment lengths, which
are variable in space but not in time. The method results in segment averaged
carbon and energy fluxes, which are shown to be representative of regional
fluxes. Our analysis is focussed on carbon dioxide, heat and evaporative
fluxes around solar noon. We will show that spatial and seasonal variations
in the fluxes can be linked to the underlying landscape. In addition, a
comparison between the airborne data and ground flux data is made to support
our results. However, due to the incompleteness of ground data for some
predominant vegetation types (even in such a data dense context), upscaling
of ground data to regional fluxes was not possible. Without the comparison,
we are still able to demonstrate that aircraft can provide direct and
meaningful estimates of regional fluxes of energy and carbon dioxide. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|