I love salad with warm components in the winter and arugula is my favorite green. (yummybeet.com)
Now, let's regress the residual from the global - US fit — i.e., the NON-global warming component of the US recordm, on the national PDSI values. (wattsupwiththat.com)
The divergence observed during the last decades is likely due to (1) an additional anthropogenic warming component, which was quite significant during the last decades, and (2) to the necessity of using a more advanced model to obtain the temperature signature of the solar variability. (link.springer.com)