The Hockham Mere pollen data shows the rates of change in levels of vegetation using pollen samples from within the Holocene period.
Hockham Mere is the site of a former lake, >400 metres diameter, in Norfolk, East Anglia. Its biogenic sediments contain a late-Devensian & Holocene pollen record.
This data can be analysed using temperature proxies to help determine climate change in the area at that time. These proxies can be the amount of pollen found in the sample, as more pollen would indicate higher flora productivity which would suggest a warmer climate. The same can be seen if data shows negligible amounts of pollen which would suggest a cooler climate. These are proxies for temperature, and not an accurate record as there are many variances that cannot be monitored easily.