Study on the relations between destruction of stable layers and topographical parameters [in relation to occurrence of frost damage]
1990
Matsuoka, N. (Chiba Univ., Matsudo (Japan). Faculty of Horticulture)
Local meteorological phenomena have not been clarified and systematized yet although they have influence on many industries and our lives. Regional low temperatures which cause frost damage are influenced by regional topographies. However, frost damage is also one of these phenomena, so even today forecasting and protecting from the damage remains a very difficult task. Therefore, the purpose of this thesis is to show the quantitative relationship between the frost damage and topography. Chapter 3 shows the meteorological observations which were made at Hayakita (located in the south-east of the Ishikari-Yuhutsu plain in Hokkaido) in order to research regional difference of frost damage. Hayakita has crops that are the most easily damaged by frost in the Ishikari-Yuhutsu plain. In particular paddy rice plants are damaged by the first frost if their growth is retarded by a cool summer. The first frost in Hayakita occurs one week earlier than other parts of the plain. To research this problem, Chitose, was selected as a control area, and some meteorological factors such as air temperature, wind speed, solar radiation, net radiation and downward radiation were compared between Hayakita and Chitose. These two areas are at the same altitude and have similar surface features. Hayakita is surrounded by hills while Chitose is in the center of the plain and is located 12 kilometers away from Hayakita. The daily minimum air temperatures and 4-hour mean values of the meteorological factors for the spring and fall of 1983 and 1984 were compared between Hayakita and Chitose. Also the variations of these factors on clear nights were compared
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by The Agriculture, Forestry and Fisheries Research Information Technology Center
