The changing climate factors that are causing the record-breaking cold and storms of the Northern Hemisphere - the La Niña and the Arctic Oscillation.

The cold stormy North American weather will continue through spring.

The South from Texas through the Carolinas is being hit by drought that will get more severe through the summer.

The changing climate factors that causing the floods and droughts in the Southern Hemisphere are La Niña, the Pacific Decadal Oscillation, the Atlantic Multidecadal Oscillation and the Indian Ocean Dipole.

The flooding danger has peaked in Australia, but the flood risk will continue for the next four months with a long-term outlook of a couple of decades of a wetter climate and less "Big Dry."

The drought is lessening for Argentina but the crop will be less than last year. Brazil has had ideal rain for agriculture but it is causing landslides in mountainous regions.

Southern Africa is experiencing crop-killing floods. The severe drought in East and North Africa are causing food shortages, increasing food prices and causing social unrest, both rioting and increased piracy.

David Fuller's view It has been an extremely difficult nine months for the producers of agricultural commodities, foreseen by Evelyn Browning Garriss, and she thinks these problems will be with us for a while longer.