Long-term variations of solar activity and cosmic rays based on the carbon-14 content in tree rings
Long-term variations of solar activity and cosmic rays based on the carbon-14 content in tree rings
批准号:
21740162
负责人:
MIYAHARA Hiroko
金额:
$3.74万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Young Scientists (B)
财政年份:
2009
资助国家:
日本
项目状态:
已结题
起止时间:
2009 至 2010
中文摘要
点击翻译按钮获取中文摘要
英文摘要
We have measured the carbon-14 content in tree rings with annual time resolution and have detected the lengthening/shortening of the eleven-year solar cycles in the past. Lengths of the eleven-year solar cycles reflect the level of solar magnetic activity. The obtained results have suggested that there is no significant millennial-scale trend in solar activity level.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
ホームページ等。
主页等
DOI:
--
发表时间:
期刊:
影响因子:
--
作者:
[]
通讯作者:
Determination of absolute ages of annual scale GCR enhancements during the Maunder Minimum based on high precision measurements of radiocarbon content in tree rings
-
批准号:23654080
-
项目类别:Grant-in-Aid for Challenging Exploratory Research
-
资助金额:$2.41万
-
财政年份:2011
-
负责人:MIYAHARA Hiroko
-
依托单位:
海外基金