{"id":9326,"title":"Tree Rings And Climate Change.","description":"In order to document a tree\u2019s changes, scientists hike to sites where the groves of trees they\u2019re interested in looking at are growing.","content":"

Documenting Tree Growth and Changes<\/strong><\/h2>

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In order to document a tree\u2019s changes, scientists hike to sites where the groves of trees they\u2019re interested in looking at are growing. They need to study a wide variety of samples from different trees of the same species to have a representative sample for the area and to get a reliable picture of the area\u2019s climate conditions.<\/p>

Initially, when scientists hike to their sites, they will survey the surroundings, ensuring that they are in a location where humans haven\u2019t altered the forests with activities such as grazing and logging. Individual trees are selected based on their apparent age\u2014the oldest provide the longest climate histories\u2014and positions that are likely to make the trees most sensitive to environmental conditions, such as away from streams or springs that can mask the potential moisture-sensitive history in the annual rings.<\/p>

Next, they begin to core the trees using what looks like a big corkscrew. A tree corer is essentially like a hollow-bit drill and works similar to an apple corer. They begin by turning the tree corer into the tree and then they turn and turn. It takes a considerable amount of effort to reach near the center of a large tree. Once they reach the center, the scientists can\u00a0pull the core out to examine the rings without harming the tree.<\/p>

Scientists core living trees to discern growth patterns over the lifespan of the trees, which is often several centuries Scientists core living trees to discern growth patterns over the lifespan of the trees, which is often several centuries. If available, dead trees and remnant logs can also be sampled, allowing for the production of a longer ring-width record. Ring patterns from dead trees can be matched up to the rings of living wood in a process called cross dating, which allows them to establish the date the dead tree began growing and its ring patterns until it died.<\/p>

Examining the Rings of Information<\/strong><\/h2>

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Once they have them in hand, the scientists return to the lab to spend hours examining the large number of cores they gather. On the plus side, the larger the number of samples they have to examine, the more certain scientists can be that changes in the rings are associated with climate. To begin examining the cores, scientists mount them in a way that they are facing upright for a microscope. Then, they sand them down to make them so smooth that every ring can be seen distinctly under the microscope. All cores are cross-dated to make certain\u00a0no rings have been misidentifed in any sample, ensuring every ring is assigned to the correct calendar year.<\/p>

Scientists use microscopes to examine the cores and take very precise measurements of the ring widths and cell density characteristics because each ring is a signal of year-to-year climate variability scientists use microscopes to examine the cores and take very precise measurements of the ring widths and cell density characteristics because each ring is a signal of year-to-year climate variability. Depending on their location and type, trees can describe precipitation or temperature conditions. Trees that depend heavily on temperature in the growing season will have narrow rings during cold periods and wider rings for warm periods. Trees that depend heavily on moisture during the growing season will have wider rings during rainy periods and narrower rings during dry periods.<\/p>

Weather data from nearby weather stations or sometimes larger-scale gridded data are compared against the ring-width time series. If there is a strong correlation, the ring widths can be used to reconstruct climate conditions for the length of the tree ring record, which is often several centuries and occasionally a thousand years or more.<\/p>","urlTitle":"tree-rings-and-climate-change","url":"\/blog\/tree-rings-and-climate-change\/","editListUrl":"\/my-blogs","editUrl":"\/my-blogs\/edit\/tree-rings-and-climate-change\/","fullUrl":"https:\/\/wonplanet.co.uk\/blog\/tree-rings-and-climate-change\/","featured":false,"published":true,"showOnSitemap":true,"hidden":false,"visibility":null,"createdAt":1609855979,"updatedAt":1612963892,"publishedAt":1612963892,"lastReadAt":null,"division":{"id":103581,"name":"won-planet"},"tags":[],"metaImage":{"original":"https:\/\/images.podos.io\/sa490shxwdxdvsrjxs3xsfja5syoisv97zmkeuy9geslstfd.jpeg","thumbnail":"https:\/\/images.podos.io\/sa490shxwdxdvsrjxs3xsfja5syoisv97zmkeuy9geslstfd.jpeg.jpg?w=1140&h=855","banner":"https:\/\/images.podos.io\/sa490shxwdxdvsrjxs3xsfja5syoisv97zmkeuy9geslstfd.jpeg.jpg?w=1920&h=1440"},"metaTitle":"","metaDescription":"","keyPhraseCampaignId":null,"series":[],"similarReads":[{"id":10302,"title":"Loss of Top Predators in the Ocean","url":"\/blog\/loss-of-top-predators-in-the-ocean\/","urlTitle":"loss-of-top-predators-in-the-ocean","division":103581,"description":"It is becoming increasingly difficult to ignore the sign of deterioration within the population dynamics of marine apex predators. Sharks, mammals, and large teleost fish amongst others species, play a critical role in maintaining a stable and balanced marine ecosystem by regulating species abundan","published":true,"metaImage":{"thumbnail":"https:\/\/images.podos.io\/odkpsfqwioc3wshg7vlrtejwn5m10m46nwx3siqqnglbkzcj.jpeg.jpg?w=1140&h=855","banner":"https:\/\/images.podos.io\/odkpsfqwioc3wshg7vlrtejwn5m10m46nwx3siqqnglbkzcj.jpeg.jpg?w=1920&h=1440"},"hidden":0},{"id":20257,"title":"Patterns of Association Within The Ocean","url":"\/blog\/patterns-of-association-within-the-ocean\/","urlTitle":"patterns-of-association-within-the-ocean","division":103581,"description":"Learn about spatial distribution within our oceans.","published":true,"metaImage":{"thumbnail":"https:\/\/images.podos.io\/kzkfvbe0pgul50gwjhpszdlqk3bkwcnkay5bw0mrkjd1pech.jpeg.jpg?w=1140&h=855","banner":"https:\/\/images.podos.io\/kzkfvbe0pgul50gwjhpszdlqk3bkwcnkay5bw0mrkjd1pech.jpeg.jpg?w=1920&h=1440"},"hidden":0},{"id":9328,"title":"Orca Communication","url":"\/blog\/orca-communication\/","urlTitle":"orca-communication","division":103581,"description":"Communication lies at the core of orca social awareness. Family members are seldom out of hearing range of one another. Their calls, as loud as a jet plane\u2019s engines, echo over many miles in the ocean","published":true,"metaImage":{"thumbnail":"https:\/\/images.podos.io\/xsoarelctthrylrfez35xmoftfhs38gukxzc6jivo292kklb.jpeg.jpg?w=1140&h=855","banner":"https:\/\/images.podos.io\/xsoarelctthrylrfez35xmoftfhs38gukxzc6jivo292kklb.jpeg.jpg?w=1920&h=1440"},"hidden":0}],"labels":[]}