| Grassland productivity response to droughts in northern China monitored by satellite-based solar-induced chlorophyll fluorescence | |
| Wang, Xinyun; Pan, Shufen; Pan, Naiqing; Pan, Peipei | |
| 2022-07-15 | |
| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| Volume | 830Issue:0Pages:154550 |
| Abstract | Solar-induced chlorophyll fluorescence (SIF) has been applied to a wide range of ecological studies, such as monitoring and assessing drought, vegetation productivity, and crop yield. Previous studies have shown that SIF is highly related to gross primary production (GPP), but its correlation with aboveground biomass (AGB) still needs further exploration. In this study, we explored the potential of SIF for monitoring and assessing the effects of climate change and meteorological drought on grassland AGB changes in the northern grassland of China. By examining the relationship between the Orbiting Carbon Observatory 2 (OCO-2) SIF and drought indices, we assessed the response of northern grassland productivity to meteorological drought conditions. The results show that SIF is very sensitive to meteorological drought and can capture drought events and the dynamics of grassland growth in different grassland types. The correlation between SIF, drought indices, and AGB varied with grassland type. A gradient boosting decision tree (GBDT) was used to explore the relationships between SIF and the impact variables in the grassland ecosystem. We found that climatic factors (e.g., annual mean growing season precipitation, annual mean growing season temperature, and annual mean vapor pressure deficit) and human activity (e.g., grazing intensity) significantly impacted the inter annual variability of grassland productivity. Our results indicate that SIF changes can reflect the seasonal dynamics of vegetation growth in the northern grassland of China. Therefore, SIF can be used as benchmark data for evaluating the performance of terrestrial ecosystem models in simulating ecosystem productivity in this region. The high sensitivity of SIF to drought suggests that it is a useful tool for monitoring and assessing drought events. |
| Department | 城市与区域生态国家重点实验室 ; 城市与区域生态国家重点实验室 |
| Keyword | GROSS PRIMARY PRODUCTION CLIMATE VARIABILITY CARBON ECOSYSTEMS INSIGHTS PHOTOSYNTHESIS DYNAMICS EXCHANGE PLATEAU IMPACTS |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47268 |
| Collection | 城市与区域生态国家重点实验室 |
| Corresponding Author | Wang, Xinyun |
| Affiliation | 1.Ningxia Univ, Sch Ecol & Environm Sci, Yinchuan 750021, Ningxia, Peoples R China 2.Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol, Yinchuan 750021, Ningxia, Peoples R China 3.Ningxia Univ, Key Lab Restorat & Reconstruct Degraded Ecosyst N, Minist Educ, Yinchuan 750021, Ningxia, Peoples R China 4.Ningxia Univ, Key Lab Restorat Degraded Ecosyst Ningxia Prov, Yinchuan 750021, Ningxia, Peoples R China 5.Auburn Univ, Int Ctr Climate & Global Change Res, Sch Forestry & Wildlife Sci, Auburn, AL 36830 |
| Recommended Citation GB/T 7714 | Wang, Xinyun,Pan, Shufen,Pan, Naiqing,et al. Grassland productivity response to droughts in northern China monitored by satellite-based solar-induced chlorophyll fluorescence[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,830(0):154550. |
| APA | Wang, Xinyun,Pan, Shufen,Pan, Naiqing,&Pan, Peipei.(2022).Grassland productivity response to droughts in northern China monitored by satellite-based solar-induced chlorophyll fluorescence.SCIENCE OF THE TOTAL ENVIRONMENT,830(0),154550. |
| MLA | Wang, Xinyun,et al."Grassland productivity response to droughts in northern China monitored by satellite-based solar-induced chlorophyll fluorescence".SCIENCE OF THE TOTAL ENVIRONMENT 830.0(2022):154550. |
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| Grassland productivi（6909KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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