δ18O of Marine‐Influenced Tectona grandis L. f. From Equatorial Indonesia: A Local Rainfall Amount and Remote ENSO Indicator

IF 3.2 2区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Paleoceanography and Paleoclimatology Pub Date : 2024-05-01 DOI:10.1029/2023pa004758

I. S. Nurhati, M. N. Evans, S. Y. Cahyarini, R. D. D’Arrigo, K. Yoshimura, S. H. S. Herho

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引用次数: 0

Abstract

The hydroclimatic response of the El Niño‐Southern Oscillation (ENSO) to external radiative forcing remains controversial and difficult to project with confidence for the 21st century. Annually resolved paleoclimatic reconstructions spanning the pre‐ and post‐industrial eras from the Indonesian maritime continent may provide hindcasting and diagnostic targets. Here we report δ18O observations from dendrochronologically dated teak (Tectona grandis L. f.) α‐cellulose samples collected at Muna Island, Sulawesi (5.3°S, 123°E, elevation 10 m), for November‐April growing seasons during the period 1969/70–2004/5. Age‐modeled, annually averaged α‐cellulose δ18O anomalies are significantly correlated with simulated α‐cellulose δ18O at the study site. We show that the correlation is largely explained by the amount effect in local and regional precipitation δ18O. Significant correlation with SST anomalies over the study period suggest that replicated multicentury α‐cellulose records from this archive may be interpreted as ENSO indicators.

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赤道印度尼西亚受海洋影响的 Tectona grandis L. f. 的 δ18O：当地降雨量和远程厄尔尼诺/南方涛动指标

厄尔尼诺-南方涛动（ENSO）对外部辐射强迫的水文气候响应仍然存在争议，而且难以对 21 世纪做出有把握的预测。印度尼西亚海洋大陆工业化前和工业化后的年度分辨古气候重建可提供后报和诊断目标。在此，我们报告了 1969/70-2004/5 年期间，从苏拉威西穆纳岛（南纬 5.3 度，东经 123 度，海拔 10 米）采集的柚木（Tectona grandis L. f.）α-纤维素样本中，对 11 月至 4 月生长季节的 δ18O 进行的年代学观测。在研究地点，年龄模拟的年平均 α-纤维素 δ18O 异常值与模拟的 α-纤维素 δ18O 显著相关。我们的研究表明，这种相关性在很大程度上是由当地和区域降水δ18O 的数量效应所解释的。研究期间与海温异常的显著相关性表明，该档案中复制的多世纪α-纤维素记录可解释为厄尔尼诺/南方涛动指标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Paleoceanography and Paleoclimatology Earth and Planetary Sciences-Atmospheric Science

CiteScore

6.20

自引率

11.40%

发文量

107

期刊介绍： Paleoceanography and Paleoclimatology (PALO) publishes papers dealing with records of past environments, biota and climate. Understanding of the Earth system as it was in the past requires the employment of a wide range of approaches including marine and lacustrine sedimentology and speleothems; ice sheet formation and flow; stable isotope, trace element, and organic geochemistry; paleontology and molecular paleontology; evolutionary processes; mineralization in organisms; understanding tree-ring formation; seismic stratigraphy; physical, chemical, and biological oceanography; geochemical, climate and earth system modeling, and many others. The scope of this journal is regional to global, rather than local, and includes studies of any geologic age (Precambrian to Quaternary, including modern analogs). Within this framework, papers on the following topics are to be included: chronology, stratigraphy (where relevant to correlation of paleoceanographic events), paleoreconstructions, paleoceanographic modeling, paleocirculation (deep, intermediate, and shallow), paleoclimatology (e.g., paleowinds and cryosphere history), global sediment and geochemical cycles, anoxia, sea level changes and effects, relations between biotic evolution and paleoceanography, biotic crises, paleobiology (e.g., ecology of “microfossils” used in paleoceanography), techniques and approaches in paleoceanographic inferences, and modern paleoceanographic analogs, and quantitative and integrative analysis of coupled ocean-atmosphere-biosphere processes. Paleoceanographic and Paleoclimate studies enable us to use the past in order to gain information on possible future climatic and biotic developments: the past is the key to the future, just as much and maybe more than the present is the key to the past.