Food habit and climate change impacts on agricultural water security during the peak population period in China

2021 ◽  
Vol 258 ◽  
pp. 107211
Author(s):  
Guohua He ◽  
Chenfan Geng ◽  
Yong Zhao ◽  
Jianhua Wang ◽  
Shan Jiang ◽  
...  
2020 ◽  
Vol 28 ◽  
pp. 100222 ◽  
Author(s):  
K.M.J. Verbist ◽  
H. Maureira-Cortés ◽  
P. Rojas ◽  
S. Vicuña

2014 ◽  
Vol 7 (5) ◽  
pp. 6773-6809
Author(s):  
T. Osborne ◽  
J. Gornall ◽  
J. Hooker ◽  
K. Williams ◽  
A. Wiltshire ◽  
...  

Abstract. Studies of climate change impacts on the terrestrial biosphere have been completed without recognition of the integrated nature of the biosphere. Improved assessment of the impacts of climate change on food and water security requires the development and use of models not only representing each component but also their interactions. To meet this requirement the Joint UK Land Environment Simulator (JULES) land surface model has been modified to include a generic parametrisation of annual crops. The new model, JULES-crop, is described and evaluation at global and site levels for the four globally important crops; wheat, soy bean, maize and rice is presented. JULES-crop demonstrates skill in simulating the inter-annual variations of yield for maize and soy bean at the global level, and for wheat for major spring wheat producing countries. The impact of the new parametrisation, compared to the standard configuration, on the simulation of surface heat fluxes is largely an alteration of the partitioning between latent and sensible heat fluxes during the later part of the growing season. Further evaluation at the site level shows the model captures the seasonality of leaf area index and canopy height better than in standard JULES. However, this does not lead to an improvement in the simulation of sensible and latent heat fluxes. The performance of JULES-crop from both an earth system and crop yield model perspective is encouraging however, more effort is needed to develop the parameterisation of the model for specific applications. Key future model developments identified include the specification of the yield gap to enable better representation of the spatial variability in yield.


One Earth ◽  
2021 ◽  
Author(s):  
Lindsay C. Stringer ◽  
Alisher Mirzabaev ◽  
Tor A. Benjaminsen ◽  
Rebecca M.B. Harris ◽  
Mostafa Jafari ◽  
...  

2018 ◽  
Vol 11 (1) ◽  
pp. 150-165
Author(s):  
S. K. Mgquba ◽  
S. Majozi

Abstract In any basin or basin country, water security is of critical importance. The increase in populations and water demand are placing stress on the available water resources. This is likely to become more complicated within shared water-courses. Issues of equitable water allocation and distribution are important for all countries involved. Fostering cooperation and managing conflict hence become fundamental in transboundary water management. Climate change is likely to add new challenges to pre-existing dynamics in transboundary systems. According to the Southern African Development Community (SADC) Climate Change Strategy and the SADC Shared Watercourses Protocol, there is a need to integrate climate change impacts and associated adaptation measures into water management plans to ensure water security for all countries involved in the future. The Orange-Senqu basin, which spans over Lesotho, South Africa, Namibia and Botswana, will be used as a case study to closely examine and reflect on some hydro-political challenges that may be brought about by climate change-associated impacts within the basin states. Although uncertain, climate projections largely indicate decline in rainfall and increase in temperature, especially within the South Africa part of the basin. This inherently is bound to affect water quantity and, therefore, availability within the riparian states below South Africa.


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