TG和VI生產(chǎn)力模型在中亞熱帶典型森林多時(shí)間尺度的適用性評(píng)價(jià)

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中圖分類號(hào)：Q948 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1000-3142（2025）08-1415-11

Abstract：Estimating gross primary productivity（GPP）of vegetation is essntial for exploring the flowand storageof carboninterestrial ecosystems and helps to explain the factors influencing global climatechange.Remotesensing GPP modelsare importanttolsfor simulating GPPat regionaland global scales.Inorder to clarify the applicabilityof two remotesensing GPPmodels，TGandVI，totwo typical forests inthecentral subtropicsas wellas the simulationeffects of diferent model parameter calibration methods，the present study wasconductedtocalibrate the sensitive parameters of the TG and VI models based on the ground-based meteorological data and MODIS data using flux-tower measured GPP at both annual and seasonal scales，and then the GPPs of the regenerated evergreen broad-leaved forest and eucalyptus plantation inthecentral subtropics were simulated，and thesimulationaccuraciesoftheTGandVImodels inthese two ecosystems were compared and analyzed.The results were as folows：（1）The simulation accuracy of the models was improved after parameter calibration，especially in thecase of seasonal calibration，the simulation accuracy was significantlybetterthan thatoftheyear-roundcalibration.（2）Thecorrelationbetween the inputparametersof the TG and VI models and the measured GPP of the two ecosystems was high（ （R2>0.70，P<0.001） .（3）The correlation betweenthe simulatedand measured GPPsof the TG model was higherthan thatofthe VImodel，and the simulation error of the TG model was the smallest in the regenerated evergreen broad-leaved forest ecosystem （ ∣RE∣<2%）. In conclusion，both models have thepotential tobeappliedintwo typical forests inthecentral subtropics，andthe simulation effect of the TG model is better than that of the VI model.

Key words： gross primary productivity（GPP），remote sensing，eddy covariance method，land surface temperature， enhancedvegetationindex

陸地生態(tài)系統(tǒng)作為凈碳匯在全球碳循環(huán)中發(fā)揮著重要作用，抵消了過去幾十年人類活動(dòng)所排放的 10%～60% 的 CO2 （Heimann & Reichstein，2008；Friedlingsteinetal.，2020）。（剩余17928字）