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- W4387307922 abstract "Terrestrial ecosystem respiration (Reco) in drylands (arid and semi-arid areas) contributes to the largest uncertainty of the global carbon cycle. Here, using the Reco data from 24 sites (98 site-years) in drylands from Fluxnet and corresponding MODIS remote sensing products, we develop a novel semi-empirical, yet physiologically-based remote sensing model: the ILEP_Reco model (a Reco model derived from ILEP, the acronym for “integrated LE and EVI proxy”). This model can simulate Reco observations across most biomes in drylands with a small margin of error (R 2 = 0.56, RMSE = 1.12 gCm −2 d −1 , EF = 0.46, MBE = −0.06 gCm −2 d −1 ) and performs significantly better than the previous model: Ensemble_all. The seasonal variation of Reco in drylands can be well simulated by the ILEP_Reco model. When we relate ILEP to the Q10 model, the corresponding ILEP_Q10 values in all 98 site-years distribute quite convergently, which greatly facilitates fixing the ILEP_Q10 value as a constant in different site-years. The spatial variation of Reco in drylands is then defined as reference respiration at the annual mean ILEP, which can be easily and powerfully simulated by the ILEP_Reco model. These results help us understand the spatial-temporal variations of Reco in drylands and thus will shed light on the carbon budget on a regional scale, or even a global one." @default.
- W4387307922 created "2023-10-04" @default.
- W4387307922 creator A5006206571 @default.
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- W4387307922 creator A5075338016 @default.
- W4387307922 creator A5076269532 @default.
- W4387307922 creator A5086020174 @default.
- W4387307922 date "2023-10-02" @default.
- W4387307922 modified "2023-10-05" @default.
- W4387307922 title "A novel approach for ecosystem respiration simulation in drylands" @default.
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