Reconstruction and Prediction of Ultraviolet and Total Solar Irradiance

紫外线和太阳总辐照度的重建和预测

• 批准号: 0718305
• 负责人: Peter Foukal
• 金额: --
• 依托单位: Heliophysics,Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2010-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0718305&HistoricalAwards=false
• 关键词: Reconstruction; Prediction; Ultraviolet; Total; Solar

The PI will ascertain the reliability of his prior 2002 UV flux and total solar irradiance (TSI) reconstructions, using two new data bases that have become available since that study. He will compare his 2002 reconstructions for the period 1915-1999 (where he used Mt. Wilson (MTW) and Sacramento Peak Ca K images), with results now emerging from UCLA's NSF-funded re-digitization of MTW data for the period 1915-1984, as well as with those from manual reduction and digitization of data for the period 1907-1995 from the Kodaikanal (India) Ca K archive. In order to expedite this data comparison, the PI will organize an open international workshop in the US for wide community participation. The PI will also use the white light facular record, compiled by the Royal Greenwich Observatory (RGO) in the United Kingdom between 1874 and 1976, to extend his irradiance reconstruction backward in time by a further 50%. The ratio of facular and sunspot areas early in a sunspot cycle has been shown to be a good predictor of sunspot cycle amplitude during the RGO observation period. The PI will measure this ratio on white light images obtained after the end of the RGO record in 1976, to test (and potentially extend) the utility of this sunspot activity predictor.This research is important to climate studies and to the interpretation of global warming observations. This project presents a plan for reconstructing, physically describing, and ultimately predicting solar radiative input variations to the Earth. The PI has published copiously on this subject and has been active in public outreach activities. He founded the East Point Solar Observatory in 1995 in Nahant, Massachusetts, and has organized a local NASA-sponsored children's summer astronomy program.

PI将确定他之前的2002年紫外线通量和总太阳辐照度（TSI）重建的可靠性，使用两个新的数据库，已成为自该研究。他将比较他的2002年重建1915年至1999年期间（在那里他使用山。Wilson（MTW）和萨克拉门托峰值钙钾图像），结果现在出现从加州大学洛杉矶分校的NSF资助的重新数字化MTW数据的1915-1984年期间，以及与那些从手动减少和数字化数据的1907-1995年期间的Kodaikanal（印度）钙钾档案。为了加快数据比较，PI将在美国组织一个开放的国际研讨会，让社区广泛参与。PI还将使用由英国皇家格林威治天文台（RGO）在1874年至1976年期间编制的白色光光斑记录，将他的辐照度重建时间向后再延长50%。太阳黑子周期早期的光斑面积和黑子面积之比已被证明是RGO观测期间太阳黑子周期振幅的良好预测因子。PI将在1976年RGO记录结束后获得的白色光图像上测量这个比率，以测试（并可能扩展）这个太阳黑子活动预测器的实用性。这项研究对气候研究和全球变暖观测的解释很重要。该项目提出了一个计划，重建，物理描述，并最终预测太阳辐射输入到地球的变化。PI就这一主题发表了大量文章，并积极参与公共宣传活动。他于1995年在马萨诸塞州的纳汉特建立了东点太阳天文台，并组织了一个由美国宇航局赞助的当地儿童夏季天文项目。