Dai (2010)
Also: Dai 2010
Drought under global warming: a review
Dai, A. (2010). Drought under global warming: a review. WIREs Climate Change. 2(1),45-65. PDF
https://doi.org/10.1002/wcc.81
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.