Meteorological observations from 1999 to 2018 at the Sapporo forest meteorology research site, Hokkaido, Japan

Abstract

Since 1999, we have conducted meteorological observations in a deciduous broadleaf forest in Sapporo, Japan. In this article, we present observation results for a 20-year period between 1999 and 2018. The observation was halted between September, 2004 and May 2005, and again from September, 2018 onward due to typhoon damage to the facilities. The mean global radiation, air temperature, and vapor pressure were 12.6 MJ m⁻² d⁻¹ , 7.4°C, and 9.4 hPa, respectively. The maximum frequency of wind direction was south–southwest, with a mean wind velocity was 2.8 m s⁻¹ . The mean annual precipitation from 2007 to 2018 was1246 mm.