Документы

DOI

We analyze Sunspot engravings and measurements in 1660 – 1676 to retrieve sunspot area and heliocoordinates. Based on these data, we revise the Hoyt and Schatten (The role of the sun in climate change, 1997) hypothesis of long-lived sunspots during the Maunder minimum as a sign of weakened convection. Historical reports also clarify what each observer defined as a sunspot and the purpose of the observations. The reconstructed longitudes of sunspots allow us to evaluate the rotation rate, revealing that the historical rotation profile resembles that of long-lived sunspot groups in the modern era.
Язык оригиналаанглийский
Номер статьи17
ЖурналSolar Physics
Том300
Номер выпуска2
DOI
СостояниеОпубликовано - 1 фев 2025

ID: 132109718