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An Adjusted Two-Leaf Light Use Efficiency Model for Improving GPP Simulations Over Mountainous Areas 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Xie, Xinyao;  Li, Ainong
收藏  |  浏览/下载:20/0  |  提交时间:2020/08/18
mountainous two-leaf light use efficiency model (MTL-LUE)  topographic effects  gross primary productivity (GPP)  direct radiation  diffuse radiation  sunlit canopy area  
Population flow drives spatio-temporal distribution of COVID-19 in China 期刊论文
NATURE, 2020
作者:  Fernandez, Diego Carlos;  Komal, Ruchi;  Langel, Jennifer;  Ma, Jun;  Duy, Phan Q.;  Penzo, Mario A.;  Zhao, Haiqing;  Hattar, Samer
收藏  |  浏览/下载:86/0  |  提交时间:2020/07/03

Sudden, large-scale and diffuse human migration can amplify localized outbreaks of disease into widespread epidemics(1-4). Rapid and accurate tracking of aggregate population flows may therefore be epidemiologically informative. Here we use 11,478,484 counts of mobile phone data from individuals leaving or transiting through the prefecture of Wuhan between 1 January and 24 January 2020 as they moved to 296 prefectures throughout mainland China. First, we document the efficacy of quarantine in ceasing movement. Second, we show that the distribution of population outflow from Wuhan accurately predicts the relative frequency and geographical distribution of infections with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) until 19 February 2020, across mainland China. Third, we develop a spatio-temporal '  risk source'  model that leverages population flow data (which operationalize the risk that emanates from epidemic epicentres) not only to forecast the distribution of confirmed cases, but also to identify regions that have a high risk of transmission at an early stage. Fourth, we use this risk source model to statistically derive the geographical spread of COVID-19 and the growth pattern based on the population outflow from Wuhan  the model yields a benchmark trend and an index for assessing the risk of community transmission of COVID-19 over time for different locations. This approach can be used by policy-makers in any nation with available data to make rapid and accurate risk assessments and to plan the allocation of limited resources ahead of ongoing outbreaks.


Modelling of population flows in China enables the forecasting of the distribution of confirmed cases of COVID-19 and the identification of areas at high risk of SARS-CoV-2 transmission at an early stage.


  
Hidden diversity of vacancy networks in Prussian blue analogues 期刊论文
NATURE, 2020, 578 (7794) : 256-+
作者:  Hendrickx, N. W.;  Franke, D. P.;  Sammak, A.;  Scappucci, G.;  Veldhorst, M.
收藏  |  浏览/下载:27/0  |  提交时间:2020/07/03

Prussian blue analogues (PBAs) are a diverse family of microporous inorganic solids, known for their gas storage ability(1), metal-ion immobilization(2), proton conduction(3), and stimuli-dependent magnetic(4,5), electronic(6) and optical(7) properties. This family of materials includes the double-metal cyanide catalysts(8,9) and the hexacyanoferrate/ hexacyanomanganate battery materials(10,11). Central to the various physical properties of PBAs is their ability to reversibly transport mass, a process enabled by structural vacancies. Conventionally presumed to be random(12,13), vacancy arrangements are crucial because they control micropore-network characteristics, and hence the diffusivity and adsorption profiles(14,15). The long-standing obstacle to characterizing the vacancy networks of PBAs is the inaccessibility of single crystals(16). Here we report the growth of single crystals of various PBAs and the measurement and interpretation of their X-ray diffuse scattering patterns. We identify a diversity of non-random vacancy arrangements that is hidden from conventional crystallographic powder analysis. Moreover, we explain this unexpected phase complexity in terms of a simple microscopic model that is based on local rules of electroneutrality and centrosymmetry. The hidden phase boundaries that emerge demarcate vacancynetwork polymorphs with very different micropore characteristics. Our results establish a foundation for correlated defect engineering in PBAs as a means of controlling storage capacity, anisotropy and transport efficiency.


  
Field evidences for the positive effects of aerosols on tree growth 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (10) : 4983-4992
作者:  Wang, Xin;  Wu, Jin;  Chen, Min;  Xu, Xiangtao;  Wang, Zhenhua;  Wang, Bin;  Wang, Chengzhang;  Piao, Shilong;  Lin, Weili;  Miao, Guofang;  Deng, Meifeng;  Qiao, Chunlian;  Wang, Jing;  Xu, Shan;  Liu, Lingli
收藏  |  浏览/下载:26/0  |  提交时间:2019/04/09
aerosol loading  aerosol-meteorology interactions  canopy photosynthesis  diffuse radiation  mechanistic photosynthesis model  sun  shade leaf  tree stem growth  vapor pressure deficit  
Seasonal, interannual and decadal drivers of tree and grass productivity in an Australian tropical savanna 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (6) : 2530-2544
作者:  Moore, Caitlin E.;  Beringer, Jason;  Donohue, Randall J.;  Evans, Bradley;  Exbrayat, Jean-Francois;  Hutley, Lindsay B.;  Tapper, Nigel J.
收藏  |  浏览/下载:18/0  |  提交时间:2019/04/09
carbon sequestration  DIFFUSE model  gross primary productivity  MODerate resolution Imaging Spectroradiometer  random forest  Southern Oscillation Index  
Impacts of aerosol pollutant mitigation on lowland rice yields in China 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2017, 12 (10)
作者:  Zhang, Tianyi;  Li, Tao;  Yue, Xu;  Yang, Xiaoguang
收藏  |  浏览/下载:15/0  |  提交时间:2019/04/09
ORYZA model  column radiation model  diffuse radiation  aerosol pollutant impact  diffuse radiation fertilization effect