Reconstruction of northeast Asia spring temperature 1784–1990 1Botanical Gardens, Tohoku University, Sendai, 980-0862, Japan
30 Jan 2013
2College of Education, Naruto University of Education, Naruto 772-8502, Japan
3Department of Geography, Western Illinois University, Macomb, IL 61455, USA
4School of Forest Resources, Chungbuk National University, Cheongju, 361-763, South Korea
Received: 06 Jul 2012 – Published in Clim. Past Discuss.: 14 Aug 2012Abstract. We describe a first attempt of wide-area dendroclimatic reconstruction, based upon seven
spring temperature-sensitive chronologies from the ring widths of living trees, in Japan and Korea.
Mean March–May temperature derived from a gridded land air temperature dataset (CRUTEM4) between 35–40° N and 125–140° E was
reconstructed for the period of AD 1784–1990. Of the seven, two Japanese chronologies were eliminated during the calibration trials. The reconstruction
accounted for 19.4% of the temperature variance in the calibration period, and is considered to be skillful
for estimating interannual-to-interdecadal variations and not for long-term change. This
reconstruction showed remarkably similar fluctuations to regional
dendroclimatic reconstructions in Japan and Korea, indicating the past
spatial coherency of spring temperatures in the region. The
reconstruction was validated against other climate proxies. A
fairly good agreement was found with cold periods as estimated from
documentary records in southeast China and Japan. The west Japan temperature
series recovered from instrumental records also showed a reasonable agreement with the
reconstruction. On the other hand, the reconstruction did not show clear abrupt depressions after the Laki and the Tambora eruptions.
These comparisons revealed that dendroclimatic spatial
reconstruction in this area offers a good potential
for reconstructing long-term and large-scale past temperature
for northeast Asia.
Revised: 09 Jan 2013 – Accepted: 09 Jan 2013 – Published: 30 Jan 2013
Citation: Ohyama, M., Yonenobu, H., Choi, J.-N., Park, W.-K., Hanzawa, M., and Suzuki, M.: Reconstruction of northeast Asia spring temperature 1784–1990, Clim. Past, 9, 261-266, doi:10.5194/cp-9-261-2013, 2013.