Hubert Lamb first proposed the existence of this event in a 1965 paper citing the presence of agricultural settlements in what is now the western United States. For 10 points each:
[10h] Name this event held to have lasted between 950 and 1250. Analysis of core samples near Lake Chichanacanab (“chee-chuh-nah-cah-knob”) has given credence to the theory that droughts during this event helped lead to the Maya collapse.
ANSWER: Medieval Warm Period [or Medieval Climate Optimum or Medieval Climate Anomaly]
[10m] Lamb also cited the extant production of this good, which was cultivated in England during the Medieval Warm Period. The spread of the phylloxera insect across the Atlantic led to a massive decline in yields of this good.
ANSWER: wine [accept grapes or grapevines]
[10e] The Medieval Warm Period was followed by a period of much colder temperatures dubbed the “little” version of one of these events. A land bridge across the Bering Strait existed during the last of the events.
ANSWER: ice age [accept Little Ice Age]
<Gov Prabhakar, Other History>