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Scientists involved in monitoring changes in Australian waters say more needs to be done to slow the effects of climate change.

Fifty scientists from around the world are in Hobart this week discussing the Argo ocean robot network.

Scientists deployed 3,000 floating devices across the globe to measure salinity, temperature and currents.

The information is beamed back to land based receivers.

Dr Susan Wijffels from the CSIRO Argo Australia program says this data is crucial to predict how fast climate change is happening.

"We definitely see the ocean warming, it's warming as fast or a little faster than some of our predictions suggest," she said.

"I think a lot of us in the climate community feel a great sense of urgency about the issue and were very happy to see so much debate occurring now in the community about it.

"We're waiting very much and hoping that there will be some action now."