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The effect of assimilating satellite-derived soil moisture data in SiBCASA on simulated carbon fluxes in Boreal Eurasia
- Source :
- Hydrology and Earth System Sciences, 20(2), 605-624, Hydrology and Earth System Sciences, Vol 20, Iss 2, Pp 605-624 (2016), Hydrology and Earth System Sciences 20 (2016) 2, Hydrology and Earth System Sciences, 20(2), 605-624. COPERNICUS GESELLSCHAFT MBH
- Publication Year :
- 2016
-
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.
- Subjects :
- 1171 Geosciences
Meteorologie en Luchtkwaliteit
010504 meteorology & atmospheric sciences
Meteorology and Air Quality
EDDY COVARIANCE
LAND-SURFACE MODELS
0208 environmental biotechnology
Eddy covariance
Soil science
02 engineering and technology
SCOTS PINE FOREST
lcsh:Technology
114 Physical sciences
01 natural sciences
lcsh:TD1-1066
CO2 EXCHANGE
Carbon cycle
DIOXIDE EXCHANGE
RETRIEVALS
Life Science
Ecosystem
lcsh:Environmental technology. Sanitary engineering
Water content
lcsh:Environmental sciences
0105 earth and related environmental sciences
General Environmental Science
lcsh:GE1-350
WIMEK
NET ECOSYSTEM EXCHANGE
Moisture
lcsh:T
lcsh:Geography. Anthropology. Recreation
AMSR-E
Vegetation
15. Life on land
SIBERIAN LARCH FOREST
020801 environmental engineering
lcsh:G
Boreal
WATER-VAPOR
13. Climate action
Soil water
General Earth and Planetary Sciences
Environmental science
Subjects
Details
- Language :
- English
- ISSN :
- 10275606 and 16077938
- Database :
- OpenAIRE
- Journal :
- Hydrology and Earth System Sciences, 20(2), 605-624, Hydrology and Earth System Sciences, Vol 20, Iss 2, Pp 605-624 (2016), Hydrology and Earth System Sciences 20 (2016) 2, Hydrology and Earth System Sciences, 20(2), 605-624. COPERNICUS GESELLSCHAFT MBH
- Accession number :
- edsair.doi.dedup.....ba11f44c1161f81b36adc694eb4df5fb