Paleoclimatology of Southeast Asia: Records From Fossil Corals on Sumba Island, Indonesia

东南亚古气候学：印度尼西亚松巴岛珊瑚化石的记录

• 批准号: 9305324
• 负责人: Donald DePaolo
• 金额: $ 3.12万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9305324&HistoricalAwards=false
• 关键词: Paleoclimatology; Southeast; Asia; Records; Fossil

9305324 DePaolo This research comprises a field expedition to collect samples of massive corals from uplifted terraces on Sumba, Nusa Tenggara, Indonesia, and isotope analyses of those samples. The objective is to produce several 30-to-150 year proxy records of seasonal climate variability in Indonesia for different time intervals in the last 150,000 years. The data will be used to assess the influence of paleogeography caused by changes in sea level on the intensity of seasonal climate variability, as well as the frequency and intensity of El Nino events as they are manifested in Southeast Asia. The effects of the El Nino/Southern Oscillation have important economic and social consequences on both sides of the Pacific Ocean. Data produced from this study will help unravel specific mechanisms of how oceanographic change affects regional and global climate change. *** 1 9305324 DePaolo This proposal seeks funds to conduct a field expedition to collect samples of massive corals from uplifted terraces on Sumba, Nusa Tenggara, Indonesia. The objective is to produce several 30-to-150 year proxy records of seasonal climate variability in Indonesia for different time intervals in the last 150,000 years. The data will be used to assess the influence of paleogeography caused by changes in sea level on the intensity of seasonal climate variability, as well as the frequency and intensity of El Nino events as they are manifested in Southeast Asia. Preliminary analyses of hand samples collected during a reconnaissance trip to Sumba last summer indicate that the proposed study is feasi ble; massive corals on Sumba are well preserved, and would provide reliable information on seasonal variability of salinity and sea surface temperature. The radiocarbon ages of samples from one of the terraces on Sumba place the growth of the coral at a time when sea level was 50 meters lower than it is today. the data produced from this study will help unravel the specific mechanisms of how oceanographic change affects regional and global climate change during time period with significantly different boundary conditions. *** ar

9305324 DePaolo 这项研究包括一次实地考察，从印度尼西亚努沙登加拉松巴岛的隆起阶地收集大量珊瑚样本，并对这些样本进行同位素分析。 目标是生成过去 15 万年不同时间间隔印度尼西亚季节性气候变化的多个 30 至 150 年代理记录。 这些数据将用于评估海平面变化引起的古地理对季节性气候变化强度的影响，以及东南亚厄尔尼诺事件的频率和强度。 厄尔尼诺/南方涛动的影响对太平洋两岸都有重要的经济和社会影响。 这项研究产生的数据将有助于揭示海洋变化如何影响区域和全球气候变化的具体机制。 *** 1 9305324 DePaolo 该提案寻求资金进行实地考察，从印度尼西亚努沙登加拉省松巴岛的隆起阶地收集大量珊瑚样本。 目标是生成过去 15 万年不同时间间隔印度尼西亚季节性气候变化的多个 30 至 150 年代理记录。 这些数据将用于评估海平面变化引起的古地理对季节性气候变化强度的影响，以及东南亚厄尔尼诺事件的频率和强度。 对去年夏天松巴岛考察期间收集的手部样本进行的初步分析表明，拟议的研究是可行的； 松巴岛上的大量珊瑚保存完好，可以提供有关盐度和海面温度季节性变化的可靠信息。 松巴岛一处台地样本的放射性碳年龄显示，珊瑚生长的时期海平面比现在低 50 米。 这项研究产生的数据将有助于揭示在边界条件显着不同的时期内海洋变化如何影响区域和全球气候变化的具体机制。 *** ar