text: The question that Im wondering about: do we know that mid-Holocene warmth was only in summer and only in the northern hemisphere, and, if so, how do we know it? Im not going to consider high-latitude NH evidence, as that does not appear to be in issue. At some point I might re-visit the question of whether we know that it was only in summer, but for now, Im going to focus on the topics and the SH. A recent survey of NH northern sites from 0-180W (Kaufman et al 2004) and results would be similar for 0-180E stated: