Indirect ways of assessing past temperatures, using so-called temperature proxies, take measurements of responses to past temperature change that are preserved in natural archives such as ice, rocks and fossils.
Wikipedia has an article on: Reorder tone. Wikipedia. fast busy signal â(plural fast busy signals) (telephony) An audible signal on a voice phone line that sounds more frequently than a standard busy singal, indicating that no transmission path to the called phone number is available.
To denote; mean: A red traffic light signifies that traffic must stop. 2. To be a sign or indication of; suggest or imply: The test results will signify how serious the problem is. The surge in housing starts signifies an upturn in the economy. 3. To make known, as with a sign or word: He signified his disagreement with a frown.