Abstract
Roberts et al. (1) state that we found no evidence of climate change at multidecadal to millennial timescales following deposition of the Youngest Toba Tuff (YTT) in Lake Malawi (2). However, we examined smear slides at a 2-mm interval, corresponding to subdecadal resolution, and X-ray fluorescence scans run at 200-µm intervals correspond to subannual resolution. We observed no obvious change in sediment composition or Fe/Ti ratio, suggesting that no thermally driven overturn of the water column occurred following the Toba supereruption.
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