Thank you for visiting nature.com. You are using a browser version with
limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off
compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site
Uncertainty reported for the acceleration corresponds to one standard error. Also listed are the two AR(1) parameters estimated for each record, after the record was linearly de-trended over the common period 1915–2009.