{"slug": "dendrochronology", "label": "Dendrochronology", "wikipedia": "https://en.wikipedia.org/wiki/Dendrochronology", "wikidata": "https://www.wikidata.org/wiki/Q80205", "qid": "Q80205", "description": "method of dating based on the analysis of patterns of tree rings", "entries": 6, "years": 6, "span": [-1626, 1737], "span_label": ["1627 BCE", "1737 CE"], "topics": [{"title": "Climate & Environment", "count": 5}, {"title": "Science & Discovery", "count": 1}], "also_known_as": ["Growth ring"], "related": [{"slug": "earth", "label": "Earth", "shared": 2}, {"slug": "mount-vesuvius", "label": "Mount Vesuvius", "shared": 1}, {"slug": "santorini", "label": "Santorini", "shared": 1}], "items": [{"year": -1626, "year_label": "1627 BCE", "section": "Climate & Environment", "date": null, "text": "1627 BC—Beginning of a period of cooling of the world climate lasting several years, recorded in tree-rings all over the world. Various volcanic eruptions have been suggested for the cause of this climatic event; the Minoan eruption of Thera, the Avellino eruption of Mount Vesuvius, or the eruption of Mount Aniakchak.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1357667915#Events_and_trends", "title": "1620s BC", "revid": 1357667915, "section": "Events and trends"}}, {"year": 774, "year_label": "774 CE", "section": "Climate & Environment", "date": null, "text": "A 1.2% growth of 14C concentration recorded in tree rings, along with corresponding spikes of 36Cl and 10Be recorded in ice cores, suggests that a very strong solar storm may have hit Earth in either 774 or 775.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1340848019#Astronomy", "title": "774", "revid": 1340848019, "section": "Events › By topic › Astronomy"}}, {"year": 775, "year_label": "775 CE", "section": "Climate & Environment", "date": null, "text": "A 1.2% growth of carbon-14 concentration recorded in tree rings suggests that a very strong solar storm may have hit Earth, in either 774 or 775. Known as the 774–775 carbon-14 spike, corresponds to the first Miyake event.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1340848014#Astronomy", "title": "775", "revid": 1340848014, "section": "Events › By topic › Astronomy"}}, {"year": 993, "year_label": "993 CE", "section": "Climate & Environment", "date": null, "text": "An increase in 14C concentration, recorded in tree rings, as well as 36Cl and 10Be isotopes, recorded in ice cores, suggests that a strong solar storm may have hit the Earth in either 993 or 994.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1350009737#Astronomy", "title": "993", "revid": 1350009737, "section": "Events › By topic › Astronomy"}}, {"year": 994, "year_label": "994 CE", "section": "Climate & Environment", "date": null, "text": "An increase in carbon-14 concentration, recorded in tree rings, suggests that a strong solar storm may have hit the Earth in either 993 or 994.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1350027284#Astronomy", "title": "994", "revid": 1350027284, "section": "Events › By topic › Astronomy"}}, {"year": 1737, "year_label": "1737 CE", "section": "Science & Discovery", "date": "February 27", "text": "February 27 – French scientists Henri-Louis Duhamel du Monceau and Georges-Louis Leclerc de Buffon publish the first study correlating past weather conditions with an examination of tree rings.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1367176390#January–March", "title": "1737", "revid": 1367176390, "section": "Events › January–March"}}]}