The effect of assimilating satellite-derived soil moisture data in SiBCASA on simulated carbon fluxes in Boreal Eurasia

Show full item record



Permalink

http://hdl.handle.net/10138/164599

Citation

van der Molen , M K , de Jeu , R A M , Wagner , W , van der Velde , I R , Kolari , P , Kurbatova , J , Varlagin , A , Maximov , T C , Kononov , A V , Ohta , T , Kotani , A , Krol , M C & Peters , W 2016 , ' The effect of assimilating satellite-derived soil moisture data in SiBCASA on simulated carbon fluxes in Boreal Eurasia ' Hydrology and Earth System Sciences , vol. 20 , no. 2 , pp. 605-624 . DOI: 10.5194/hess-20-605-2016

Title: The effect of assimilating satellite-derived soil moisture data in SiBCASA on simulated carbon fluxes in Boreal Eurasia
Author: van der Molen, M. K.; de Jeu, R. A. M.; Wagner, W.; van der Velde, I. R.; Kolari, P.; Kurbatova, J.; Varlagin, A.; Maximov, T. C.; Kononov, A. V.; Ohta, T.; Kotani, A.; Krol, M. C.; Peters, W.
Contributor: University of Helsinki, Ecosystem processes/ Jaana Bäck
Date: 2016
Language: eng
Number of pages: 20
Belongs to series: Hydrology and Earth System Sciences
ISSN: 1027-5606
URI: http://hdl.handle.net/10138/164599
Abstract: Boreal Eurasia is a region where the interaction between droughts and the carbon cycle may have significant impacts on the global carbon cycle. Yet the region is extremely data sparse with respect to meteorology, soil moisture, and carbon fluxes as compared to e.g. Europe. To better constrain our vegetation model SiBCASA, we increase data usage by assimilating two streams of satellite-derived soil moisture. We study whether the assimilation improved SiBCASA's soil moisture and its effect on the simulated carbon fluxes. By comparing to unique in situ soil moisture observations, we show that the passive microwave soil moisture product did not improve the soil moisture simulated by SiBCASA, but the active data seem promising in some aspects. The match between SiBCASA and ASCAT soil moisture is best in the summer months over low vegetation. Nevertheless, ASCAT failed to detect the major droughts occurring between 2007 and 2013. The performance of ASCAT soil moisture seems to be particularly sensitive to ponding, rather than to biomass. The effect on the simulated carbon fluxes is large, 5-10% on annual GPP and TER, tens of percent on local NEE, and 2% on area-integrated NEE, which is the same order of magnitude as the inter-annual variations. Consequently, this study shows that assimilation of satellite-derived soil moisture has potentially large impacts, while at the same time further research is needed to understand under which conditions the satellite-derived soil moisture improves the simulated soil moisture.
Subject: NET ECOSYSTEM EXCHANGE
SIBERIAN LARCH FOREST
LAND-SURFACE MODELS
SCOTS PINE FOREST
EDDY COVARIANCE
WATER-VAPOR
DIOXIDE EXCHANGE
CO2 EXCHANGE
AMSR-E
RETRIEVALS
114 Physical sciences
1171 Geosciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
hess_20_605_2016.pdf 1.217Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record