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1. 11,000 Year Sunspot Number Reconstruction [NOAA_NCDC_PALEO_2005-015]
From Direct observations of sunspot numbers are available for the past four centuries, but longer time series are required, for example, ...

2. Causes of Climate Change Over the Past 1000 Years, NOAA/NCDC/WDC Paleoclimatology [NOAA_NCDC_PALEO_2000-045]
Recent reconstructions of northern hemisphere temperatures and climate forcing over the last 1000 years allow the warming of the 20th century to be placed within a historical context and various mechanisms ...

3. Reconstructed Solar Irradiance Data, 1600-1994AD [NOAA_NCDC_PALEO_1998-028]
Reconstructed solar total and background irradiances. 11-yr Tootal Solar Irradiance (TSI) component since 1874 is from Foukal and Lean: earlier from Hoyt Sunspot Groups Background Brightness component ...

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