Research published in Quaternary Science Reviews offers a new reconstruction of climate in Yellowstone Lake, USA. Analyzing oxygen isotopes, charcoal, pollen, and diatoms deposited in the lake over the last 9800 years, the researchers found that the climate was highly sensitive to changes in seasonal insolation, especially as linked to the Northeastern Pacific subtropical high-pressure system. Notable for historians is the distinct local warming during the Medieval Climate Anomaly and cooler, wetter weather during the Little Ice Age (1550-1850 locally). Read the full paper here.
Climate History Network