Volcanic cooling signal in tree ring temperature records for the past millennium
MetadataShow full item record
KeywordVolcanism; Dendrochronology; Maximum latewood density; Tree rings; Cross-dating; Temperature reconstructions
Tree rings are an important proxy for understanding the timing and environmental consequences of volcanic eruptions as they are precisely dated at annual resolution and, particularly in tree line regions of the world, sensitive to cold extremes that can result from climatically significant volcanic episodes. Volcanic signals have been detected in ring widths and by the presence of frost-damaged rings, yet are often most clearly and quantitatively represented within maximum latewood density series. Ring width and density reconstructions provide quantitative information for inferring the variability and sensitivity of the Earth's climate system on local to hemispheric scales. After a century of dendrochronological science, there is no evidence, as recently theorized, that volcanic or other adverse events cause such severely cold conditions near latitudinal tree line that rings might be missing in all trees at a given site in a volcanic year (“stand-wide” missing rings), resulting in misdating of the chronology. Rather, there is a clear indication of precise dating and development of rings in at least some trees at any given site, even under adverse cold conditions, based on both actual tree ring observations and modeling analyses. The muted evidence for volcanic cooling in large-scale temperature reconstructions based at least partly on ring widths reflects several factors that are completely unrelated to any misdating. These include biological persistence of such records, as well as varying spatial patterns of response of the climate system to volcanic events, such that regional cooling, particularly for ring widths rather than density, can be masked in the large-scale reconstruction average.
Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Atmospheres 118 (2013): 9000–9010, doi:10.1002/jgrd.50692.
Showing items related by title, author, creator and subject.
Volcanic glasses at the Izu arc volcanic front : new perspectives on fluid and sediment melt recycling in subduction zones Straub, S. M.; Layne, Graham D.; Schmidt, A.; Langmuir, Charles H. (American Geophysical Union, 2004-01-22)Volcanic glasses contained in distal fallout tephras from the Izu arc volcanic front (Izu VF) provide unique perspectives on general problems of arc volcanism. Unlike cogenetic lavas, these glasses are liquid compositions ...
Environmental data collected from biomimetic and other data loggers located in rocky intertidal zones of global oceans between July 1999 and October 2013 Helmuth, BrianAt a proximal level, the physiological impacts of global climate change on ectothermic organisms are manifest as changes in body temperatures. Especially for plants and animals exposed to direct solar radiation, body ...
Hayes, Jorden L.; Holbrook, W. Steven; Lizarralde, Daniel; Van Avendonk, Harm J. A.; Bullock, Andrew D.; Mora, Mauricio M.; Harder, Steven H.; Alvarado, Guillermo E.; Ramirez, Carlos J. (John Wiley & Sons, 2013-04-29)Island arcs are proposed to be essential building blocks for the crustal growth of continents; however, island arcs and continents are fundamentally different in bulk composition: mafic and felsic, respectively. The substrate ...