P2C2: A Network of Paleo-Monsoon Rainfall Stations in Southeast Asia to Investigate Atmospheric Circulation Changes over the Past Four Centuries

P2C2：东南亚古季风降雨站网络，用于调查过去四个世纪的大气环流变化

• 批准号: 0902507
• 负责人: Lowell Stott
• 金额: $ 40.46万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902507&HistoricalAwards=false
• 关键词: P2C2; Network; Paleo; Monsoon; Rainfall

Funding is provided to support the development and calibration of a method for reconstructing rainwater delta Oxygen-18 from cellulose extracted from the annual rings of trees that grow throughout Thailand. The researchers will measure delta Oxygen-18 tree cellulose from Khasi pine and Merkus pine trees as a means to reconstruct annual to subannual records of atmospheric precipitation at sites across Southeast (SE) Asia. The researchers hypothesize that the increased moisture from the Indian Ocean is a response to the expansion of the continental monsoon trough eastward over SE Asia. To test this hypothesis, the researchers will extend the data base of Pine delta Oxygen-18 to sites across SE Asia in order to map the spatial pattern of precipitation delta Oxygen-18 variability.The project offers the promise of helping opening tropical tree-rings to climate analysis. This is important because, at present, tropical tree cannot be used as a reliable paleoclimate archive because they do not lay down visible seasonal tree rings as do higher latitude specimens. Developing an isotopic technique for tropical trees would be a transformative breakthrough in climate analysis.

提供了资金来支持从从泰国生长的一年生长的树木环中提取的纤维素中重建雨水氧气18的方法的开发和校准。研究人员将测量来自Khasi Pine和Merkus Pine树的Delta oxygen-18树纤维素，以此来重建东南亚（SE）亚洲地点的年度大气降水记录。研究人员假设印度洋的水分增加是对东南亚洲东部季风谷的扩张的回应。为了检验这一假设，研究人员将将松树氧气18的数据库扩展到SE亚洲的地点，以绘制降水量Delta oxygen-18变异性的空间模式。该项目提供了帮助开放热带树环以使气候分析开放的热带树环。这很重要，因为目前，热带树不能用作可靠的古气候档案，因为它们没有像更高的纬度标本那样放置可见的季节性树环。 在气候分析中，开发热带树的同位素技术将是一个变革性的突破。