Collaborative Research: Past and Present Climatic Controls on the Stable Isotope Composition of Precipitation at Low Latitude Proxy Sites

合作研究：过去和现在的气候对低纬度代理地点降水稳定同位素组成的控制

• 批准号: 0317693
• 负责人: Mathias Vuille
• 金额: $ 14.55万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0317693&HistoricalAwards=false
• 关键词: Collaborative; Research; Past; Present; Climatic

This award helps build upon the researchers' previously NSF-funded research on the climatic controls on stable water isotopes (i.e., delta 18-Oxygen, delta Deuterium) in precipitation at low latitude proxy sites. The researchers' main scientific goal is to evaluate the controls on stable isotope variability at various low latitude ice core locations (i.e., Tropical Andes, Tibet, Himalaya) in the modern world and in the past. This will help to resolve some of the controversy surrounding the interpretation of paleoclimate records derived from tropical ice cores. Specific research goals include:-- investigating the modern climatic controls such as temperature, precipitation volume effect, moisture source variability and atmospheric circulation on stable isotopes at tropical ice core sites and analyzing the influence of climate modes such as El Nino-Southern Oscillation (ENSO) or Asian monsoon intensity on stable isotope variability,-- analyzing the influence of changed orbital parameters (mid-Holocene conditions) upon stable isotope distribution and potential climatic controls related to tropical ice cores,-- investigating the effect of Last Glacial Maximum (LGM) boundary conditions upon low latitude stable isotope distribution by prescribing new and more realistic reconstructions of glacial tropical sea surface temperature (SST) data,-- exploring the use of the Deuterium excess in tropical ice cores as an additional climate proxy for improved reconstructions of tropical oceanic conditions, and-- performing model evaluation by comparing the simulated results with the available proxy data and with International Atomic Energy - Global Network of Isotopes in Precipitation (IAEA-GNIP) and National Center for Environmental Prediction - National Center for Atmospheric Research (NCEP-NCAR) reanalysis data for the modern experiments.All experiments will be based on the GISS II (4 degrees latitude x 5 degrees longitude, with new improved topographic control over the Andes) model and the European Center-Hamburg ECHAM-4 (T30 and T106 spectral resolution) models. This research will provide improved understanding of paleoclimatic records that are used to help understand natural climate variability compared to anthropogenic influences on climate. The data and model output resulting from this research will be made available to the wider scientific community through the World Data Center-A for Paleoclimatology.

该奖项有助于基于研究人员先前由NSF资助的研究，该研究在低纬度代理地点的降水中，在稳定水同位素（即Delta 18-Oxygen，delta deuterium）上的气候控制（即Delta 18-氧气，三角洲）。研究人员的主要科学目标是评估各种低纬度冰核位置（即热带安第斯山脉，西藏，喜马拉雅山）对稳定的同位素变异性的控制。这将有助于解决围绕热带冰芯衍生的古气候记录解释的一些争议。特定的研究目标包括： - 研究现代气候控制，例如温度，降水量效应，水分源可变性和大气循环在热带冰核地点的稳定同位素上，并分析气候模式的影响，例如El Nino-Southern振荡（ENSO）振荡（ENSO）或亚洲季风强度对稳定的异型性变异性，或分析稳定的异型（Indiasope）的影响（分析） - 分析（分析） - 分析或分析 - 分析 - 分析 - 分析 - 分析 - 分析 - 更改且影响力 - 分析 - 范围更改 - 刺激性 - 分析构成的影响，是在变化的影响，并分析了构想的影响，并且可以变化，并且可以改变，并且可以改变，并且可以改变 - 分析构成的影响，是在变化的影响。同位素分布和与热带冰芯相关的潜在气候控制 - 调查了最后冰川最大（LGM）边界条件对低纬度稳定的同位素分布的影响以及 - 通过将模拟结果与可用的代理数据进行比较以及国际原子能 - 降水的全球同位素网络（IAEA-GNIP）和国家环境预测中心 - 国家大气研究中心（NCEP-NCAR）重新分析的现代实验数据，所有实验将基于giss II（4 gress ii the grange teplive x vermeplution），进行了模型评估。安第斯山脉模型和欧洲中心 - 汉堡ECHAM-4（T30和T106光谱分辨率）模型。 这项研究将提供对古气候记录的了解，这些记录与人为对气候的影响相比，用于帮助了解自然气候变化。这项研究产生的数据和模型输出将通过世界数据中心A提供给更广泛的科学界，以实现古气候。