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New development of gas and energy flux measurement system over sea surface

海面气体与能量通量测量系统新进展

基本信息

批准号：
13554014
负责人：
TSUKAMOTO Osamu
金额：
$ 8.06万
依托单位：
OKAYAMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13554014/
关键词：
Sea surface flux Air-sea interaction Sea surface heat balance Carbon dioxide Gas exchange Eddy-covariance method Eddy flux On-board measurement

项目摘要

On-board eddy flux measurement system were developed into a real-time data processing system with a new program on a laptop computer. The new system were setup on the R/V MIRAI, JAMSTEC since 2002. In addition to the energy flux measurement, new infrared gas analyzer were installed for the measurement of CO2 flux over the ocean. This is a unique system as a tool for the direct CO2 flux measurement without empirical transfer velocity. Her cruise extends from tropics to the Arctic areas, and her cruise extended to the round trip in southern hemisphere during 2003.A large amount of turbulence data were accumulated and quality control of the raw data is the most important after the cruise. A various kinds of trials were experienced to select a good datasets. Finally, a suitable algorithm of the quality control are established.Based on the selected data, surface flux distributions were analyzed for the energy, water vapor and carbon dioxide. Comparing the surface fluxes of heat and water vapor, the results were almost consistent with the bulk estimates. However, the magnitude of the CO2 eddy flux were much larger than the traditional bulk estimates. And in some cases, the direction of the CO2 transport conflict between the two method. This is a new finding of the present project for the solution of the "missing sink" of CO2.In the present project, we have developed a new automated measurement system including energy and gas flux over ocean. The conflict of the CO2 flux should be solved as the next project by careful examinations of eddy-covariance method and the bulk method as the cooperation between ocean chemist group.

将星载涡流流量测量系统发展成为一个在笔记本电脑上进行实时数据处理的系统。新系统自2002年起安装在JAMSTEC的R/V米拉伊上。除了能量通量测量外，还安装了新的红外气体分析仪，用于测量海洋上空的CO2通量。这是一个独特的系统，作为一种工具，直接测量CO2通量没有经验的传输速度。2003年，她的巡航范围从热带地区扩展到北极地区，并在南半球进行了一次往返。为了选择一个好的数据集，进行了各种各样的试验。最后，建立了一个合适的质量控制算法，并根据选定的数据，分析了地面通量的能量，水汽和二氧化碳的分布。通过对地表热量通量和水汽通量的比较，结果与整体估算值基本一致。然而，CO2涡动通量的大小远大于传统的整体估计。而且在某些情况下，两种方法之间的CO2输运方向发生冲突。这是本项目在解决CO2“漏汇”问题上的一个新发现。在本项目中，我们开发了一种新的海洋能量通量和气体通量自动测量系统。CO2通量的矛盾应作为下一个研究课题，通过对涡度相关法和海洋化学家小组合作的整体法的仔细研究来解决。