PV water pumping for carbon sequestration in dry land agriculture.

This paper suggests a novel model for analysing carbon sequestration activities in dry land agriculture considering the water-food-energy-climate nexus. The paper is based on our on-going studies on photovoltaic water pumping (PVWP) systems for irrigation of grasslands in China. Two carbon sequestration projects are analysed in terms of their water productivity and carbon sequestration potential. It is concluded that the economic water productivity, i.e. how much water that is needed to produce an amount of grass, of grassland restoration is low and that there is a need to include several of the other co-benefits to justify the use of water for climate change mitigation. The co-benefits are illustrated in a nexus model including (1) climate change mitigation, (2) water availability, (3) downstream water impact, (4) energy security, (5) food security and (6) moisture recycling. We argue for a broad approach when analysing water for carbon sequestration. The model includes energy security and food security together with local and global water concerns. This makes analyses of dry land carbon sequestration activities more relevant and accurate. Without the nexus approach, the co-benefits of grassland restoration tend to be diminished.

[1]  J. Niu,et al.  A multilevel analysis of effects of land use policy on land-cover change and local land use decisions , 2014 .

[2]  Jesús Carrera,et al.  Coupling of mass transfer and reactive transport for nonlinear reactions in heterogeneous media , 2010 .

[3]  Fahu Chen,et al.  Desertification in China: An assessment , 2008 .

[4]  Hubert H. G. Savenije,et al.  Analyzing precipitationsheds to understand the vulnerability of rainfall dependent regions , 2011 .

[5]  Jianshuang Wu,et al.  Effects of grazing exclusion on plant productivity and soil carbon, nitrogen storage in alpine meadows in northern Tibet, China , 2014, Chinese Geographical Science.

[6]  Jinyue Yan,et al.  Feasibility analysis of solar irrigation system for pastures conservation in a demonstration area in Inner Mongolia , 2013 .

[7]  Hubert H. G. Savenije,et al.  Origin and fate of atmospheric moisture over continents , 2010 .

[8]  Jinyue Yan,et al.  Feasibility evaluation of solar photovoltaic pumping irrigation system based on analysis of dynamic variation of groundwater table , 2013 .

[9]  Pietro Elia Campana,et al.  Dynamic modelling of a pv pumping system with special consideration on water demand , 2013 .

[10]  K. Dittert,et al.  Legume-based forage production systems reduce nitrous oxide emissions , 2014 .

[11]  G. Erice,et al.  Water use efficiency, transpiration and net CO2 exchange of four alfalfa genotypes submitted to progressive drought and subsequent recovery. , 2011 .

[12]  Rong Yang,et al.  Changes in Soil Aggregate, Carbon, and Nitrogen Storages Following the Conversion of Cropland to Alfalfa Forage Land in the Marginal Oasis of Northwest China , 2009, Environmental management.

[13]  K. Paustian,et al.  GRASSLAND MANAGEMENT AND CONVERSION INTO GRASSLAND: EFFECTS ON SOIL CARBON , 2001 .

[14]  Karen Holm Olsen,et al.  Sustainable development benefits of clean development mechanism projects: A new methodology for sustainability assessment based on text analysis of the project design documents submitted for validation , 2008 .

[15]  Tsuyoshi Akiyama,et al.  Grassland degradation in China: Methods of monitoring, management and restoration , 2007 .

[16]  D. Bossio,et al.  Conserving Land, Protecting Water , 2008 .

[17]  D. Catacutan,et al.  Pricing rainbow, green, blue and grey water: tree cover and geopolitics of climatic teleconnections , 2014 .

[18]  Yong-zhong Su.  Soil carbon and nitrogen sequestration following the conversion of cropland to alfalfa forage land in northwest China , 2007 .

[19]  Malin Falkenmark,et al.  The planetary water drama: Dual task of feeding humanity and curbing climate change , 2012 .

[20]  Xubin Pan,et al.  Combating desertification in China: Past, present and future , 2013 .

[21]  Claudia Pahl-Wostl,et al.  Water Resilience for Human Prosperity , 2014 .

[22]  Johan Rockström,et al.  Water for food and nature in drought-prone tropics: vapour shift in rain-fed agriculture. , 2003, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[23]  Unfccc.  Kyoto Protocol to the United Nations Framework Convention on Climate Change , 1997 .

[24]  H. Cutforth,et al.  Comparative forage yield, water use, and water use efficiency of alfalfa, crested wheatgrass and spring wheat in a semiarid climate in southern Saskatchewan , 2005 .

[25]  Wojciech M. Budzianowski,et al.  Negative carbon intensity of renewable energy technologies involving biomass or carbon dioxide as inputs , 2012 .

[26]  D. Molden.  Water for food, water for life: a comprehensive assessment of water management in agriculture , 2007 .

[27]  Zhicai Zhang,et al.  Management and land use change effects on soil carbon in northern China's grasslands: a synthesis , 2011 .

[28]  Xing Wu,et al.  Restoration of ecosystem carbon and nitrogen storage and microbial biomass after grazing exclusion in semi-arid grasslands of Inner Mongolia , 2014 .

[29]  K. Fraedrich,et al.  A Green Planet Versus a Desert World: Estimating the Maximum Effect of Vegetation on the Land Surface Climate , 2000 .

[30]  Quanzhen Wang,et al.  Organic carbon and nitrogen stocks in reed meadow soils converted to alfalfa fields , 2009 .

[31]  Neil C. Hansen,et al.  Strategies for Reducing Alfalfa Consumptive Water Use , 2008 .

[32]  Yihun T. Dile,et al.  The role of water harvesting to achieve sustainable agricultural intensification and resilience against water related shocks in sub-Saharan Africa , 2013 .

[33]  Jinyue Yan,et al.  An economic analysis of photovoltaic water pumping irrigation systems , 2016 .

[34]  R. Skinner.  High biomass removal limits carbon sequestration potential of mature temperate pastures. , 2008, Journal of environmental quality.

[35]  Prem S. Bindraban,et al.  Improving agricultural water productivity: Between optimism and caution , 2010 .

[36]  Rattan Lal,et al.  The knowns, known unknowns and unknowns of sequestration of soil organic carbon , 2013 .

[37]  E. Yeh.  GREEN GOVERNMENTALITY AND PASTORALISM IN WESTERN CHINA: 'CONVERTING PASTURES TO GRASSLANDS' , 2005 .

[38]  R. Lal,et al.  Soil carbon sequestration in China through agricultural intensification, and restoration of degraded and desertified ecosystems , 2002 .

[39]  P. Campana.  PV WATER PUMPING SYSTEMS FOR GRASSLAND AND FARMLAND CONSERVATION , 2013 .

[40]  J. Ni.  Carbon storage in grasslands of China , 2002 .

[41]  M. Ottman.  Water Stress and Alfalfa Production , 1999 .

[42]  Andreas Meyer-Aurich,et al.  Irrigation, soil organic carbon and N2O emissions. A review , 2013, Agronomy for Sustainable Development.

[43]  F. Chapin,et al.  A safe operating space for humanity , 2009, Nature.

[44]  A. Dai.  Drought under global warming: a review , 2011 .

[45]  Jinyue Yan,et al.  Model of evapotranspiration and groundwater level based on photovoltaic water pumping system , 2014 .

[46]  Jinyue Yan,et al.  Potential for carbon sequestration and mitigation of climate change by irrigation of grasslands , 2014 .

[47]  David Rind,et al.  Regions of rapid sea ice change: An inter‐hemispheric seasonal comparison , 2012 .

[48]  Mingguo Ma,et al.  Carbon fluxes, evapotranspiration, and water use efficiency of terrestrial ecosystems in China , 2013 .

[49]  Dolf Gielen,et al.  Considering the energy, water and food nexus: Towards an integrated modelling approach , 2011 .