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| Titel |
Response of CO2 and H2O fluxes in a mountainous tropical rainforest in equatorial Indonesia to El Niño events |
| VerfasserIn |
A. Olchev, A. Ibrom, O. Panferov, D. Gushchina, H. Kreilein, V. Popov, P. Propastin, T. June, A. Rauf, G. Gravenhorst, A. Knohl |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 22 ; Nr. 12, no. 22 (2015-11-24), S.6655-6667 |
| Datensatznummer |
250118173
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| Publikation (Nr.) |
 copernicus.org/bg-12-6655-2015.pdf |
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| Zusammenfassung |
| The possible impact of El Niño–Southern Oscillation (ENSO) events on the
main components of CO2 and H2O fluxes between the tropical rainforest
and the atmosphere is investigated. The fluxes were continuously measured in an
old-growth mountainous tropical rainforest in Central Sulawesi in
Indonesia using the eddy covariance method for the period from January 2004
to June 2008. During this period, two episodes of El Niño and one
episode of La Niña were observed. All these ENSO episodes had moderate
intensity and were of the central Pacific type. The temporal variability
analysis of the main meteorological parameters and components of CO2
and H2O exchange showed a high sensitivity of evapotranspiration (ET)
and gross primary production (GPP) of the tropical rainforest to
meteorological variations caused by both El Niño and La Niña
episodes. Incoming solar radiation is the main governing factor that is
responsible for ET and GPP variability. Ecosystem respiration (RE) dynamics
depend mainly on the air temperature changes and are almost insensitive to
ENSO. Changes in precipitation due to moderate ENSO events did not have any
notable effect on ET and GPP, mainly because of sufficient soil moisture
conditions even in periods of an anomalous reduction in precipitation in the
region. |
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