PETALING JAYA: A more detailed study is needed on how Malaysia and its neighbours are affected by the El Nino phenomenon, especially with global warming, says an expert.

The impact should be viewed collectively with Peninsular Malaysia, Sumatra and south Thailand as one unit, while Borneo could be viewed as a separate unit, said Prof Datuk Dr Azizan Abu Samah.The Institute of Ocean and Earth Sciences senior research fellow said Malaysia, Thailand and Indonesia should not be viewed as individual countries when studying the impact of El Nino