Tree Ring Thing News Today

It happens because of a warming and a change in circulation of the oceans. and here in this case, the biggest ocean on the planet. now what she worries about is can it get more severe and can it get more frequent with climate change. to do that, she needs a thermometer that can measure the temperature of the ocean in the past. >> okay, how do you do that? how do you figure out whether el nino 20 years ago or 100 years ago is worse? >> she look at corals. and she basically goes underwater with a ...