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This case study uses the CARIWIG weather generator and the FAO AquaCrop model to assess the impact of future climate change on field-grown sweet potato production in Jamaica. The study compares a historical period (1981-2010) with a future period (2041-2070) under the A1B medium emissions scenario, focusing on three varieties: Ganja, Uplifta, and Yellow Belly.

This policy brief from the Stockholm Environment Institute and UNEP argues that traditional measures of 'water productivity' are too narrow because they often focus solely on agricultural output (e.g., 'crop per drop') while ignoring the essential role of landscape ecosystem services. The document advocates for an integrated water resource management (IWRM) approach that balances agricultural needs with the maintenance of natural water storage and ecosystem functions to ensure long-term sustainability and human well-being.