Were it not for the moderating effect of the oceans we would be seeing much greater effect on land.
Let's talk about deforestation. Pick nearly any location in North America or Western Europe (I know it's true in Pennsylvania) and look at landscape photos or paintings from 100+ years ago and you see very few trees. They had been cut down for fuel and lumber and farm land over the centuries. Look today, at the same spots, and you see the forests are back -- big time. Even in places were there were historically few trees such as the Great Plains there are now considerable plots of man-made forest.
In North America and Europe, there are more acres of forest now than there were 100 years ago. Wouldn't that imply that we should be seeing less drought, flooding and cooler temps than a century ago?