MBH98 features its famous hockey stick graph in two figures. By mistake, an older version of the reconstruction was actually used for one of the figures.
I like a good puzzle so decided to do some reverse engineering on the "old" MBH98 reconstruction. 🧵
MBH98 uses the old reconstruction for signal detection. Since the forcing data begins in the early 1600s, only the post-1600 portion of the reconstruction is shown in the paper.
The goal of this thread is to reproduce that part of the reconstruction and then extend it.
Mar 17, 2023 • 17 tweets • 6 min read
(1/17) A fact-checker told me that Wahl & Ammann 2007 used the same proxy data as MBH98. Let's see if this is TRUE or FALSE.
This Python script generates most of the figures in this thread (and downloads ~150 MB of data): pastebin.com/06pKtnQh
(2/17) The MBH98 temperature reconstruction and the WA emulation of it span the period AD 1400–1980 and are concatenations of a dozen or so shorter reconstructions, each using a separate network of available proxies. These notes will focus on the earliest interval (AD 1400–1449).
MBH98 uses the old reconstruction for signal detection. Since the forcing data begins in the early 1600s, only the post-1600 portion of the reconstruction is shown in the paper.
