Australia's hidden history of megadroughts captured in ancie

Australia's hidden history of megadroughts captured in ancient tree rings
By Ben Deacon
© Provided by ABC NEWS
South-west Western Australia experienced droughts of more than 30 years in past centuries, a new study shows. (ABC News: Andrew O'Connor)
Scientists analysing growth rings of 700-year-old in native cypress trees in Western Australia's Wheatbelt say the region suffered a series of megadroughts lasting up to 30 years in past centuries.
The study has also suggested the region was comparatively blessed with rain during the 20th century.
Climatologist Alison O'Donnell said rainfall records since 1900 capture "one of the wettest periods in the last 700 years". 
"The worst drought periods that have occurred in this region occurred prior to instrumental records," she said.

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