David Wratt retired as Chief Scientist, Climate at NIWA in September 2014. He was responsible for oversight, strategic direction, planning and leadership of NIWA's work on climate, climate change, and climate services. He is still available to assist with climate and climate change related tasks in the Pacific. David has contributed extensively to the work of the IPCC, first as a Working Group 2 Coordinating Lead Author, and then as a Vice-Chair of IPCC Working Group 1. He placed particular importance on information exchange and outreach events in Pacific Island and South-East Asian countries. From his work on development and applications of weather and climate knowledge David has published papers, book chapters and client reports on: climate change assessment, projections, scenarios and impacts; agricultural applications including detailed climate mapping; mountain meteorology; linked rainfall and hydrology modelling; air pollution meteorology.