学術雑誌

Diurnal and Seasonal Relationships between Nocturnal Cooling and Meteorological Parameters: Validation Using Observation Data

eng

00753467

Japan Climatology Seminar

Japanese progress in climatology

2015

43

43

2015-12

Version of Record

We investigated diurnal and seasonal relationships between nocturnal cooling and meteorological parameters by using 5-year observation data from the NARO Tohoku Agricultural Research Center, Japan. Multiple regression analysis between nocturnal cooling (T_noc) and meteorological parameters (total net radiation, Rn_tot; total weak-wind duration, Wd_tot; and snow depth, SD) revealed that Rn_tot and Wd_tot dominantly contributed to T_noc. Diurnal relationships among T_noc, Rn_tot and Wd_tot suggested that a strong temperature drop occurred not only on calm nights but also at nights when weak wind conditions lasted at least a few hours. In addition, in the warm season, correlation coefficients between T_noc and Rn_tot were nearly the same in every Wd_tot category. In the cold season, however, those coefficients varied with Wd_tot. We attributed this difference to the strong, synoptic-scale winds that accompanied cold and warm advection in the cold season.

Other

AA00249627