Ok, i'll walk everyone through with what this graph means, for any who do not understand it.
First of all, this graph was constructed by taking temperature records from 13 different proxies around the world. There's data collected from Greenland, Africa, Europe, Antarctica, and the Atlantic and Pacific Oceans. The records from these temperatures are then average together to form a trend line.
The trend line is important in that it not only represents a trend, but it is the Average heat energy the Earth is receiving at any given time. This means that from what we see on the graph, often it isn't the amount of energy that the Earth is absorbing that changes much, but the sequestration of the energy across the planet. Thermodynamics states that energy can neither be created nor destroyed, so when a certain amount of energy enters a system, this will be all the energy that system has.
Therefore, changes in local temperatures, as shown on the graph, more the most part, do not represent a change in the total amount of energy absorbed by the planet.
So, to summarize, this means that the trend line is the relative amount of energy the Earth is receiving. With this information, we can better analyze the graph and the repercussions thereof.
This graph shows a massive increase in the amount of energy that the Earth is absorbing over the past 200 years. This rate of increase is so large that it cannot be represented accurately on the larger graph, which is why there is an arrow pointing to the current state of the world's average temperatures, and a smaller graph showing recent proxy information. There are no atmospheric forcings, besides greenhouse gasses, that can be credited with these recent massive increase.
Or maybe there are. Can you name some?