I know what you’re thinking: Who, they?
According to the website:
IGBP is an international scientific research programme built on interdisciplinarity, networking and integration. It addresses scientific questions where an international approach is the best or the only way to provide an answer. We add value to a large number of individual, national and regional research projects through integrating activities to achieve enhanced scientific understanding.
IGBP’s mission is to deliver scientific knowledge to help human societies develop in harmony with Earth’s environment. Our scientific objective is to describe and understand the interactive physical, chemical and biological processes that regulate the total Earth System, the unique environment that it provides for life, the changes that are occurring in this system, and the manner in which they are influenced by human actions. As one of four international global environmental change research programmes, IGBP works towards its objective in close collaboration with the International Human Dimensions Programme on Global Environmental Change (IHDP), the World Climate Research Programme (WCRP), and DIVERSITAS, an international programme of biodiversity science. The International Council for Science (ICSU) is the common scientific sponsor of the four international global environmental change programmes.
Well, that clarifies it for me. It’s obvious now. Their commitment to science is clearly exemplary, which is why in a presentation on climate change, on slide 7 we see:
It’s funny, but whenever people talk about climate change over the last 1000 years, they pull up the same graph. Never any of the others that are meant to "duplicate" this one study.
Thanks to Michael Mayson for the heads-up.