To improve the prediction of crop yields at an aggregate scale, we developed a data assimilation-crop modeling framework that incorporates remotely sensed soil moisture and leaf area index (LAI) into a crop model using sequential data assimilation. The core of the framework is an Ensemble Kalman ...
Ines, Amor V. M.
,
Das, NN
,
Hansen, James
,
Njoku, EG
,
[Assimilation of remotely sensed soil moisture and vegetation with a crop simulation model for maize yield prediction]
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Assimilation of remotely sensed soil moisture and vegetation with a crop simulation model for maize yield prediction
To achieve food security for many in low-income and middle-income countries for whom this is already a challenge, especially with the additional complications of climate change, will require early investment to support smallholder farming systems and the associated food systems that supply poor c...
Vermeulen, Sonja J.
,
Zougmoré, Robert B.
,
Wollenberg, Eva K.
,
Thornton, Philip K.
,
Nelson, Gerald C.
,
Kristjanson, Patricia M.
,
Kinyangi, James
,
Jarvis, Andy
,
Hansen, James
,
Challinor, Andrew J.
,
Campbell, Bruce M.
,
Aggarwal, Pramod K.
,
[Climate change, agriculture and food security: A global partnership to link research and action for low-income agricultural producers and consumers]
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Climate change, agriculture and food security: A global partnership to link research and action for low-income agricultural producers and consumers
Drought is of global concern for society but it originates as a local problem. It has a significant impact on water quantity and quality and influences food, water, and energy security. The consequences of drought vary in space and time, from the local scale (e.g. county level) to regional scale ...
Mishra AK
,
Ines AVM
,
Das, NN
,
Khedun CP
,
Singh VP
,
Sivakumar B
,
Hansen, James
,
[Anatomy of a local-scale drought: Application of assimilated remote sensing products, crop model, and statistical methods to an agricultural drought study]
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Anatomy of a local-scale drought: Application of assimilated remote sensing products, crop model, and statistical methods to an agricultural drought study
Throughout at least the past several centuries, El Niño-Southern Oscillation (ENSO) has played a significant role in human response to climate. Over time, increased attention on ENSO has led to a better understanding of both the physical mechanisms, and the environmental and societal consequences...
Zebiak, Stephen E.
,
Orlove B
,
Vaughan, Catherine
,
Muñoz, A.G.
,
Hansen, James
,
Troy T
,
Thomson M
,
Lustig A
,
Garvin S
,
[Investigating El Niño-Southern Oscillation and society relationships]
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Investigating El Niño-Southern Oscillation and society relationships
This paper provides a historical overview of the development and mainstreaming of global agendas on climate risk management and climate services from the vantage point of the International Research Institute for Climate and Society (IRI), and present two examples that illustrate how efforts to ma...
Hansen, James
,
Zebiak, Stephen E.
,
Coffey, Kevin
,
[Shaping global agendas on climate risk management and climate services: an IRI perspective]
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Shaping global agendas on climate risk management and climate services: an IRI perspective
Session one of this report highlights ILRAD's research programs and the modelling needs of ILRAD and FAO. Session two deals with vector and helminth population dynamics with particular reference to ticks, tsetse and helminth. Parasite transmission and host parasite interaction are discussed in se...
Perry, Brian D.
,
Hansen, James
,
[Modelling vector-borne and other parasitic diseases. Proceedings of a workshop]
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Modelling vector-borne and other parasitic diseases. Proceedings of a workshop
The paper briefly reviews the epidemiology and control of helminth parasites of small ruminants of economic importance in the tropics. Epidemiological factors influencing seasonal availability and acquisition of nematiode larvae and metacercaria by sheep and goats on pasture are discussed. The pa...
Tembely, S.
,
Hansen, James
,
[Helminth diseases of small ruminants in the tropics: A review of epidemiology and control strategies]
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Helminth diseases of small ruminants in the tropics: A review of epidemiology and control strategies
Barrett, Christopher B.
,
Barnett, B.J.
,
Carter, S.
,
Chantarat, S.
,
Hansen, James
,
Mude, Andrew G.
,
Osgood, D.E.
,
Skees, J.R.
,
Turvey, C.G.
,
Ward, M.N.
,
[Poverty traps and climate risk: limitations and opportunities of index-based risk financing]
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Poverty traps and climate risk: limitations and opportunities of index-based risk financing
Many opportunities to improve agricultural resilience to a variable and changing climate depend on access to high-quality local climate records and are constrained by data gaps. Addressing data quality of meteorological station observations. The ENACTS approach builds capacity of a National Mete...
Dinku, Tufa
,
Hansen, James
,
Rose, Alison
,
Damen, Beau
,
Sheinkman, Michael
,
[Enhancing National Climate Services (ENACTS) approach to support climate resilience in agriculture.]
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Enhancing National Climate Services (ENACTS) approach to support climate resilience in agriculture.
Access to accurate and useful climate-related information is a prerequisite for smallholder farmers to use and benefit from climate services with respect to both agricultural and livelihood decision-making. Whether or not farmers access particular climate-related information products is determine...
Gumucio, Tatiana
,
Hansen, James
,
Huyer, Sophia
,
Huysen, Tiff van
,
Schwager, Saroja
,
[Identifying Pathways for More Gender-Sensitive Communication Channels in Climate Services]
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Identifying Pathways for More Gender-Sensitive Communication Channels in Climate Services