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DOI | 10.1029/2018GL080981 |
Spatiotemporal Variability in the Climate Growth Response of High Elevation Bristlecone Pine in the White Mountains of California | |
Bunn, Andrew G.1; Salzer, Matthew W.2; Anchukaitis, Kevin J.2,3; Bruening, Jamis M.1,4; Hughes, Malcolm K.2 | |
2018-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:24页码:13312-13321 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Tree-ring chronologies from bristlecone pine (Pinus longaeva) are a unique proxy used to understand climate variability over the middle to late Holocene. The annual rings from trees growing toward the species' lower elevational range are sensitive to precipitation variability. Interpretation of the ring-width signal at the upper forest border has been more difficult. We evaluate differences in climate induced by topography (topoclimate) to better understand the dual signals of temperature and moisture. We unmix signals from trees growing at and near the upper forest border based on the seasonal mean temperature (SMT) experienced by each tree. We find that trees growing in exposures with SMT <7.5 degrees C are limited by temperature, while trees with SMT > 7.5 degrees C are limited by moisture. We demonstrate this independently through analysis of growth in the frequency and time domains and using a process model of xylogenesis. Furthermore, we identify increasing moisture sensitivity in trees formerly limited by temperature. Plain Language Summary Tree rings from ancient bristlecone pines are a remarkable proxy for climate, extending back thousands of years. However, interpreting this record has been difficult because some trees record information on both past temperature and past soil moisture variability. These dual growth responses can be hard to separate. We show that differentiating trees based on relatively small differences in location, determined by their topographical setting and therefore the "local climate" individual trees have experienced, can help unravel these mixed signals and provide a better basis for understanding growth and past climate. We find that even near the alpine treeline, only trees in the coldest settings show ring-width growth that is sensitive to temperature. However, we also show that recent warming might have weakened this temperature response by causing bristlecone pine to switch to a moisture-sensitive growth response. |
英文关键词 | paleoclimate divergence dendroclimatology topoclimate treeline |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456404600016 |
WOS关键词 | TREE-RING GROWTH ; UNITED-STATES ; ALTITUDINAL TREELINE ; CAMBIAL PHENOLOGY ; WOOD FORMATION ; TEMPERATURE ; PATTERNS ; GRADIENT ; FORESTS ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26734 |
专题 | 气候变化 |
作者单位 | 1.Western Washington Univ, Dept Environm Sci, Bellingham, WA 98225 USA; 2.Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA; 3.Univ Arizona, Sch Geog & Dev, Tucson, AZ USA; 4.Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA |
推荐引用方式 GB/T 7714 | Bunn, Andrew G.,Salzer, Matthew W.,Anchukaitis, Kevin J.,et al. Spatiotemporal Variability in the Climate Growth Response of High Elevation Bristlecone Pine in the White Mountains of California[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(24):13312-13321. |
APA | Bunn, Andrew G.,Salzer, Matthew W.,Anchukaitis, Kevin J.,Bruening, Jamis M.,&Hughes, Malcolm K..(2018).Spatiotemporal Variability in the Climate Growth Response of High Elevation Bristlecone Pine in the White Mountains of California.GEOPHYSICAL RESEARCH LETTERS,45(24),13312-13321. |
MLA | Bunn, Andrew G.,et al."Spatiotemporal Variability in the Climate Growth Response of High Elevation Bristlecone Pine in the White Mountains of California".GEOPHYSICAL RESEARCH LETTERS 45.24(2018):13312-13321. |
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