Juan Chang's research while affiliated with Nanjing Forestry University and other places

Publications (6)

Article
Forest carbon stocks has an important role in the global carbon budget. Based on the satellite-observed and LPJ model simulated aboveground biomass carbon (ABC) data, the spatial and temporal changes of subtropical forest carbon storage in the Yangtze River basin and its relations to the climate variation and human activities were analyzed by using...
Article
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The purpose of this study is to quantitatively evaluate the accuracy of the GPM IMERG v5 and the TRMM 3B42 v7, with the reference of 224 rain gauge stations over the Yangtze River basin in China from April 2014 to December 2017. The results showed that: (1) The changing pattern of IMERG v5 was similar to the 3B42 v7, and higher correlations can be...
Article
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Net Primary Productivity (NPP) is a basis of material and energy flows in terrestrial ecosystems, and it is also an important component in the research on carbon cycle and carbon budget. This paper evaluated the spatial distribution pattern and temporal change trends for forest NPP simulated by the LPJ (Lund-Potsdam-Jena) model and NDVI (normalized...
Article
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Low flow is a seasonal phenomenon which is a critical requirement for utilization of water resources under rapidly changing environmental conditions. The operation of the Three Gorges Dam (TGD) has had a great influence on downstream low flow in the Yangtze River. In this paper, the characteristics of low flow in the main Yangtze River were analyze...
Article
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The grasslands in arid and semi-arid regions rely heavily on the use of rain, thus, improving rain use efficiency (RUE) is essential for securing sustainable development of grassland ecosystems in these areas with limited rainfall. In this study, the spatial and temporal variabilities of RUE for grassland ecosystems over Northwestern China during 1...
Article
Lakes and vegetation are important factors of the Earth's hydrological cycle and can be called an "indicator" of climate change. In this study, long-term changes of lakes' area and vegetation coverage in the Qinghai-Tibetan Plateau (QTP) and their relations to the climate change were analyzed by using Mann-Kendall method during the past 30years. Re...

Citations

... Due to severe logging and reclamation in the last century, the ecosystem in the Dongting Lake Basin has been severely degraded [40]. Since 2000, the projects of GGP and Natural Forest Conservation Program have been carried out in the Dongting Lake basin to protect and restore the ecosystems [35,40]. ...
... Different studies were carried out to assess the performance of GPM-IMERG products in different spatial extents including global, regional, and local scales [38][39][40][41][42][43][44][45][46][47][48][49]. Among the abovementioned studies [37,39,41,42] found that GPM-IMERGF was outperformed other products and GPM-IMERG late and early versions in terms of different statistical metrics across China. ...
... Around the globe, except for a few countries that have established repeated measurements of forest inventory (Brown, 2002;Harris et al., 2021), a ground survey of forest carbon stocks is still scarce for many regions (Batlle-Bayer et al., 2010). Although remote sensing provides a potential tool to monitor changes in forest coverage and biomass (Zhao et al., 2019;Zhang et al., 2019), yet ground-based information is required to train remote sensing-based biomass estimations (Hoover et al., 2018). ...
... The Three Gorges Dam (TGD) is located at the upstream of the Yangtze River, and it is now the largest concrete dam in the world (Lai et al., 2014a) with an average annual runoff of 451 billion m 3 and a flood control capacity of 22.2 billion m 3 . However, some concerns have been raised about the hydrological and environmental impacts of TGD on the midstream and downstream of the Yangtze River (Wang et al., 2013a;Wang et al., 2013b;Wang et al., 2017;Niu, 2016;Qin et al., 2020), such as changes in the spatial and temporal distribution of water resources (Dai et al., 2013a;Guo et al., 2012;Jiang et al., 2014;Tian et al., 2019), and a higher probability of extreme hydrological events (Sun et al., 2012;Yu et al., 2019). ...
... The study area has a large seasonal and inter-annual climate variability and covers semi-arid (rainfall of 300-600 mm yr − 1 ), sub-humid (rainfall of 600-1000 mm yr − 1 ) to humid (1000-2500 mm yr − 1 ) areas ( , S1). The climate variability within the biome leads to the possibility that the biological productivity trend has the highest correlation to climate as detected in South Africa (Wessels et al., 2012), the Sahel region (Dardel et al., 2014;Fensholt and Rasmussen, 2011;Ibrahim et al., 2015) and in China (Chang et al., 2018;Chen et al., 2018). Climate extremes (mainly rainfall) are removed to detect human-induced degradation since climate correlates the most with biomass productivity (Archer, 2004;Evans and Geerken, 2004). ...
... Air temperature (Ta) is an important meteorological parameter for a wide range of applications, such as public health (Lan et al., 2010;Zhang et al., 2019), disease vectors propagating (Lowen et al., 2007;Petrova and Russell, 2018;Wu et al., 2020), epidemic forecasting (Aggarwal et al., 2012;Connor et al., 1998), weather forecasting (Müller et al., 2017;Smith et al., 1988), terrestrial hydrology and phenology (Lin et al., 2012;Ren et al., 2019;Wang et al., 2009), climate and environment change (Huang et al., 2019;Lamchin et al., 2018;Zhang et al., 2018a). Many methods and techniques exist to measure air temperature across space and over time. ...