Application of the Minimum Blue-Intensity Technique to A Southern-Hemisphere Conifer
Issue Date
2016-07Keywords
Australian Alpsdendroclimatology
growing season
maximum temperature
Podocarpus lawrencei
teleconnection
Metadata
Show full item recordCitation
Brookhouse, M., & Graham, R. (2016). Application of the Minimum Blue-Intensity Technique to A Southern-Hemisphere Conifer. Tree-Ring Research, 72(2), 103–107.Publisher
Tree Ring SocietyJournal
Tree-Ring ResearchAdditional Links
http://www.treeringsociety.orgAbstract
Minimum blue-intensity (BI) appears to be a viable source of proxy-temperature data, but is yet to be applied to a Southern-Hemisphere species. Here, we apply the BI technique to Podocarpus lawrencei, a conifer endemic to the Australian Alps. We develop sample-preparation protocols and examine the climate sensitivity of resulting tree-ring width (TRW) and BI chronologies. We found that extractable resins were removed from P. lawrencei samples after 28 hours of Soxhlet extraction and a highly-significant negative correlation (r =-0.79, p<0.0001) exists between the resulting BI chronology and growing season (August-April) temperature maxima. The climate sensitivity of our BI data, combined with an apparent teleconnection with a previously-reported dataset, suggests that an unparalleled opportunity exists to develop a powerful proxy for growing-season temperatures in southeast Australia. © 2016 by The Tree-Ring Society.Type
Articletext
Language
enISSN
1536-1098EISSN
2162-4585ae974a485f413a2113503eed53cd6c53
10.3959/1536-1098-72.02.103