Journal
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
Volume 15, Issue -, Pages 353-363Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTARS.2021.3132723
Keywords
Forestry; Vegetation mapping; Productivity; Remote sensing; Biological system modeling; Rivers; Spatiotemporal phenomena; Climate controls; downscaling; net primary productivity (NPP); spatiotemporal variation; the upper Luanhe River basin
Categories
Funding
- National Key R&D Program of China [2017YFA0603002, 2016YFB0501502]
- National Natural Science Foundation of China [41531174]
Ask authors/readers for more resources
In this study, vegetation net primary productivity (NPP) in the upper Luanhe River Basin from 2000 to 2017 was generated using a data fusion model and the MuSyQ NPP model. The results showed a fluctuating increasing trend in annual NPP, with precipitation being a significant factor for the interannual variation. Temperature had a weak influence on NPP. Additionally, human activities could change the trend of annual NPP.
The upper Luanhe River Basin is a significant ecological barrier guarding the Beijing-Tianjin-Hebei region in China. Quantitative measures of vegetation productivity can be used to assess ecosystem carbon sequestration capacity and monitor regional ecological environmental health. Although several vegetation productivity products have been generated, poor spatiotemporal resolution limits their application in ecosystem service assessment. In this article, vegetation net primary productivity (NPP) from 2000 to 2017 with a resolution of 30 m in the upper Luanhe River Basin was generated based on a data fusion model and the multisource data synergized quantitative (MuSyQ) NPP model. Then, the variation trend of NPP and its climate controls were analyzed. Compared with forest NPP observation data, we derived an R-2 of 0.68 and the root-mean-square error of 81.70 gC(.)m(-2.)yr(-1). Annual NPP had a fluctuating increasing trend from 2001 to 2017, with values ranging between 3.43 and 5.00 TgC(.)yr(-1), with an annual increase trend of 0.04 TgC(.)yr(-1). Precipitation was significantly correlated with NPP in the upper part of the Luanhe River basin, which is an important reason for the interannual variation of NPP. Grassland had a stronger correlation to precipitation than forest because it is more sensitive to precipitation. The area where the temperature is significantly correlated with annual NPP only accounts for 2% of the study area, indicating that temperature has a weak influence on NPP. Furthermore, human activities, such as forest management, fertilization, and irrigation, can change the trend of annual NPP.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available