Solar irradiance during the last 1200 years based on cosmogenic nuclides
Solar irradiance during the last 1200 years based on cosmogenic nuclides
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DOI：
10.3402/tellusb.v52i3.17080
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发表时间：
2000-01
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影响因子：
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通讯作者：
E. Bard;G. Raisbeck;Françise Yiou;J. Jouzel
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文献类型：
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作者：
E. Bard;G. Raisbeck;Françise Yiou;J. Jouzel
基于对 14C 和 10Be 生产率共同波动的定量研究，我们得出了过去 1200 年太阳磁变率的时间序列。该记录根据过去几个世纪对类日恒星和太阳行为的研究，通过线性缩放转换为辐照度变化。新的太阳辐照度记录在著名的太阳极小期（集中于公元 1900 年、1810 年（道尔顿）和 1690 年（蒙德））期间表现出较低的值。追溯到更早的时期，公元 1450 年至 1750 年之间相当长的一段时期的特点是辐照度值较低。较短的时期集中在大约 1200 ad，辐照度略高于或类似于当今的值。人们很容易将这些时期分别与所谓的“小冰期”和“中世纪温暖期”联系起来。准确量化这一新辐照度记录的气候影响需要使用耦合的大气-海洋环流模型（GCM）。尽管如此，我们的记录已经与“小冰期”期间全球降温约 0.5-1°C 以及过去千年期间的总体降温趋势以及 20 世纪全球变暖相一致（Mann 等，1999）。
Based on a quantitative study of the common fluctuations of 14C and 10Be production rates, we have derived a time series of the solar magnetic variability over the last 1200 years. This record is converted into irradiance variations by linear scaling based on previous studies of sun-like stars and of the sun’s behavior over the last few centuries. The new solar irradiance record exhibits low values during the well-known solar minima centered at about 1900, 1810 (Dalton) and 1690 ad(Maunder). Further back in time, a rather long period between 1450 and 1750 ad is characterized by low irradiance values. A shorter period is centered at about 1200 ad, with irradiance slightly higher or similar to present day values. It is tempting to correlate these periods with the so-called “little ice age” and “medieval warm period” respectively An accurate quantification of the climatic impact of this new irradiance record requires the use of coupled atmosphere−ocean general circulation models (GCMs). Nevertheless, our record is already compatible with a global cooling of about 0.5-1°C during the “little ice age”, and with a general cooling trend during the past millenium followed by global warming during the 20th century (Mann et al., 1999).