https://scholars.lib.ntu.edu.tw/handle/123456789/370233
標題: | ENSO and PDO strongly influence Taiwan spruce height growth | 作者: | Guan, B. T. Wright, W. E. Chung, C. H. Chang, S. T. SHANG-TZEN CHANG |
關鍵字: | Dendrochronology; El Niño-Southern Oscillation; Ensemble empirical mode decomposition; Pacific Decadal Oscillation; Picea morrisonicola; Sea surface temperature | 公開日期: | 2012 | 卷: | 267 | 起(迄)頁: | 50-57 | 來源出版物: | Forest Ecology and Management | 摘要: | To assess the influences of the El Niño-Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) on the mean annual height growth of the Taiwan spruce (Picea morrisonicola), we constructed two height growth indices (HGI1 and HGI2) using an ensemble empirical mode decomposition approach based on stem analysis of 19 trees. The most significant periodicities for HGI1 and HGI2 were 4.5 and 15.5. years, respectively. Both indices positively correlated with the mean annual height growth and reflected the influences of local thermal environment variability at various lag times, up to 3. years prior to the shoot extension season. The lagged relationships were likely caused by a combination of the species' two-year height growth process, the delayed responses of the local climate to sea surface temperature (SST) variation, and persistence due to needle lifespan. The correlations between HGI1 and a detrended SST field showed a spatial pattern similar to that of the ENSO. At lags of both 3 and 4. years, the correlations between HGI2 and the SST field revealed a spatial pattern resembling that of PDO. When leading by 3 and 4. years, respectively, the NINO4 and PDO indices positively associated with the mean annual height growth and together explained 37% of the variance; the marginal effect of the NINO4 index was twice as large as that of the PDO index. The results show that the height growth of Taiwan spruce responded to both ENSO and PDO in a positive manner. This study demonstrates that quasi-periodic climate variation on an interannual (ENSO) to interdecadal (PDO) time scale can significantly influence tree growth and should be taken into account when assessing the impact of climate changes on forest productivity, and the results of this study provide a basis for incorporating the influences of such quasi-periodic climate variations into future model-based assessments. © 2011 Elsevier B.V.. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84255195524&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/370233 |
DOI: | 10.1016/j.foreco.2011.11.028 | SDG/關鍵字: | Dendrochronology; Ensemble empirical mode decomposition; Pacific decadal oscillation; Picea morrisonicola; Sea surface temperatures; Atmospheric temperature; Climate change; Forestry; Nickel compounds; Atmospheric pressure; biological production; climate change; climate variation; coniferous tree; dendrochronology; El Nino-Southern Oscillation; empirical analysis; ensemble forecasting; environmental effect; growth rate; height determination; Pacific Decadal Oscillation; periodicity; sea surface temperature; shoot growth; stem; Barometric Pressure; Directional Measurement; Growth; Nickel Compounds; Picea Morrisonicola; Seasonal Variation; Temperature; Picea; Picea morrisonicola |
顯示於: | 森林環境暨資源學系 |
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