We've seen this chart, and similar, paraded out thousands of times and always they expose the ignorance and incompetence of those who present such, showing they fail to grasp a key factor on proper use of statistical data. The chart presents a very small fragment of the larger scale of thousands to millions of years and as such is a tiny dot on the larger scales.
Data over the span of 145 years fails to reflect the larger trends of millions of years. On the following graph, your 145 year "data" is a barely noticeable dot on the larger measure and doesn't compete with the much grander scales of temperature displacements which are far greater than this minor flux of 1 degree C.
In fact, your graph, reduced into scale and scope of the above would not even be visible as a part of it.
So are we seeing gross ignorance or gross dis-information(lying) on your part ???