Temperature reconstructions for the past 320 years based on local diary weather records and meteorological data

Abstract

In Japan, official meteorological observations by the Japan Meteorological Agency started only after the 1870s, which was too short to objectively discuss long-term climate change on a scale of decades to centuries. Therefore, the actual conditions and regional differences in climate change since the Little Ice Age in East Asia, including Japan, have not yet been clarified. Based on diary weather records and meteorological observation data, we reconstructed winter and summer temperature fluctuations over the past 320 years from 1701 to the present to clarify the actual conditions of long-term climate change and analyzed the seasonal and regional differences.