JaLCDOI 10.18926/fest/54862
タイトル(別表記) Method for predicting minimum air temperature in the next morning using local meteorological observation data - Improvement on minimum air temperature forecasting system utilizing the Internet -
フルテキストURL fest_022_055_059.pdf
著者 上田 悠生| 三島 拓也| 三浦 健志| 諸泉 利嗣|
抄録 We have developed a minimum air temperature forecasting system using local meteorological observation data in order to prevent or mitigate the frost damage. In this paper, the correlation between the meteorological factors and the decrease in air temperature during the night was shown. Then minimum air temperature was predicted by the multiple regression equation that uses air temperature and humidity at 18:00 as explanatory variables. As the result, the root mean square error (RMSE) was 2.8°C. When the difference of air temperature between 17:00 and 18:00 was used for the prediction instead of humidity, the RMSE was 3.5°C. Next, the prediction was carried out only in clear nights, then the equation that use air temperature and humidity at 18:00 showed that the RMSE was 1.3°C. Although the predictive accuracy of the equations for clear nights is low on cloudy or rainy nights, we can forecast safely on frosty nights by using those equations in combination with the equations for all nights.
キーワード Minimum air temperature prediction frost damage IT multiple regression analysis
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2017-03
22巻
1号
開始ページ 55
終了ページ 59
ISSN 2187-6940
言語 Japanese
論文のバージョン publisher
NAID 120005997443
JaLCDOI 10.18926/fest/53219
タイトル(別表記) Building of minimum air temperature forecast system using the Internet -Design of the forecast website-
フルテキストURL fest_020_035_040.pdf
著者 三島 拓也| 三浦 健志| 諸泉 利嗣|
抄録  The purpose of this study is to build a forecast system for predicting at minimum air temperature in the next morning from the meteorological data, such as air temperature, humidity, and the amount of solar radiation, in a field in the evening on the previous day. The meteorological data are sent to a relay server, and then, transferred to a PC in our laboratory of Okayama University by executing the computer program to import the data which are used to calculate the predicted values of minimum air temperature. The predicted minimum air temperatures are released for the farmers on the website in the server of Okayama University. The website is also created by our laboratory. As a result, the predicted minimum air temperatures agreed with the measured ones.
キーワード Minimum air temperature prediction internet frozen disaster
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2015-03
20巻
1号
開始ページ 35
終了ページ 40
ISSN 2187-6940
言語 Japanese
論文のバージョン publisher
NAID 120005572534
著者 MOROIZUMI, Toshitsugu| ITO, Naoya| KOSKIAHO, Jari| TATTARI, Sirkka|
発行日 2014-06
出版物タイトル SYKE-OU Project Report
資料タイプ 研究報告書
JaLCDOI 10.18926/fest/44792
タイトル(別表記) Improvement of complementary relationship-based evapotranspiration model
フルテキストURL fest_016_035_039.pdf
著者 中道 丈史| 諸泉 利嗣| 三浦 健志|
抄録 Advection-Aridity(AA) model can calculate actual evapotranspiration by using only meteorological data. However, comparing the model with Penman equation showed that AA model doesn’t properly evaluate evapotranspiration from urban moisture area. In urban area, Actual evaporation from water calculated by AA model(E) are much less than that by Penman equation(Epo). Multiple regression analysis using estimation results indicates that the difference between the models is due to the difference of the sensitivity to vapor pressure deficit between the models. To improve this problem, modification coefficient k, defined as k=a・albedo+b, is suggested. Regression coefficients a, b are determined as satisfying k=Epo/E for water and k=1 for urban surface. By using this coefficient k, evaporation from water is nearly equal to value estimated by Penman equation, while evaporation from urban surface is changeless.
キーワード Complementary relationship Actual evapotranspiration Potential evapotranspiration Water budget
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2011-03-18
16巻
1号
開始ページ 35
終了ページ 39
ISSN 2185-3347
言語 Japanese
論文のバージョン publisher
NAID 120002949472
著者 諸泉 利嗣| 楠山 倫世| 三浦 健志|
発行日 2009-12
出版物タイトル 環境制御
31巻
資料タイプ 紀要論文
著者 諸泉 利嗣|
発行日 2006-12
出版物タイトル 環境制御
28巻
資料タイプ その他
著者 諸泉 利嗣| 佐々木 裕美| 三浦 健志|
発行日 2008-12
出版物タイトル 環境制御
30巻
資料タイプ 学術雑誌論文
著者 吉崎 文人| 黒田 訓宏| 三浦 健志| 諸泉 利嗣|
発行日 2004-07-01
出版物タイトル 岡山大学農学部センター報告
26巻
資料タイプ 紀要論文
JaLCDOI 10.18926/fest/11537
タイトル(別表記) Long-term Change Trend of Climate at Aomori City
フルテキストURL 006_081_084.pdf
著者 諸泉 利嗣| 佐藤 裕一| 佐藤 幸一| 三浦 健志|
抄録 Characteristics of long-term change for air temperature, precipitation and snowfall-depth at Aomori city were analyzed with data during the 111 years, from 1886 to 1996. The typical results were as follows: (1) The increasing rate of the annual mean air temperature was 1.07℃/111 year. (2) The increasing rate of the monthly minimum air temperature was larger than that of the monthly maximum air temperature. (3) The increasing rate of the monthly air temperature was large from winter to spring, however, was not so from summer to autumn. (4) The decreasing rate of annual precipitation was 0.187 mm/year. (5) The 5-year moving average of annual snowfall-depth might indicate the existence of about 10-year period.
キーワード Air temperature precipitation snowfall-depth long-term change Aomori city
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2001-02-28
6巻
1号
開始ページ 81
終了ページ 84
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313378
JaLCDOI 10.18926/fest/11536
タイトル(別表記) Long-term Trend of Rainfall at Tsudaka Farm of Okayama University
フルテキストURL 007_107_111.pdf
著者 諸泉 利嗣| 四方田 穆| 三浦 健志|
抄録 Characteristics of long-term change in rainfall at Tsudaka Farm of Okayama University were analyzed with data during the 20 years, from 1979 to 1998. The typical results were as follows: (1) The average of annual rainfall was 1203 mm at average, 1726 mm at maximum, and 666 mm at minimum. (2) The decreasing rate of the annual rainfall was 5.37 mm/year. (3) Trend of rainfall intensity in each rainfall duration showed an increase of which rate were 0.005~0.256 mm/h/year, contrary to the annual trend. (4) Rainfall intensities in n-years probability were estimated using the maximum rainfall intensity for each rainfall duration.
キーワード Rainfall Rainfall intensity Rainfall duration Talbot formula Long-term trend Tsudaka Farm of Okayama University
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2002-03-22
7巻
1号
開始ページ 107
終了ページ 111
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313813
JaLCDOI 10.18926/fest/11507
タイトル(別表記) Survey on Spatial Variability of Surface Soil Moisture and Soil Physical Properties in a Sloping Grassland Field
フルテキストURL 008_081_085.pdf
著者 諸泉 利嗣|
抄録 Spatial variability of surface soil moisture, bulk density, satureted hydraulic conductivity, and penetration resistance (cone index) in a sloping grassland field were surveyed. The typical results were as follows: (1) The surface soil moisture and the bulk density were normally distributed at a significant level of 0.05. (2) The surface soil moistures were higher at low area than in high and slope area. The coefficients of variation were larger at slope area. (3) The coefficients of variation for bulk density were larger at slope area than in low area. (4) The distribution of saturated hydraulic conductivity can be considered to be log-normally distributed. (5) The cone index showed the normal distribution.
キーワード Spatial variability Surface soil moisture Bulk density Saturated hydraulic conductivity Cone index
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2003-03
8巻
1号
開始ページ 81
終了ページ 85
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313346
JaLCDOI 10.18926/fest/11469
タイトル(別表記) Measurement of thermal conductivity in soils and application of de Vries model
フルテキストURL 009_117_120.pdf
著者 諸泉 利嗣| 佐藤 裕一| 佐藤 幸一| 佐々木 長市|
抄録 Thermal conductivity of soil samples were measured using a twin transient-state cylindrical-probe method. The system of measurement consists of DC power supply, data logger, personal computer, 100cc soil sample, reference material sample, and two heat probes. The typical results were as follows: (1) Thermal conductivity of soils increased according to an increase of soil water content. (2) The thermal conductivity of Toyoura sand was larger than one of Kuroboku soil. (3) The thermal conductivity estimated by de Vries model had good agreement with the measured value.
キーワード Thermal conductivity Twin transient-state cylindrical-probe method de Vries model Volumetric water content
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2004-02-27
9巻
1号
開始ページ 117
終了ページ 120
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313616
JaLCDOI 10.18926/fest/11440
タイトル(別表記) Measurement of thermal conductivity in the soils of Shirakami Mountains
フルテキストURL 011_089_092.pdf
著者 繁澤 和佳子| 諸泉 利嗣| 佐々木 長市|
抄録 Thermal conductivity of soils in Shirakami Mountains that was registered on UNESCO's World Natural Heritage in 1993 were measured using a twin transient-state cylindrical-probe method. The typical results were as follows:(1) Thermal conductivity of the soils in Shirakami Mountains increased according to an increase of soil water content, which was the same tendency as the other soils. (2) The thermal conductivity of the soils was about 0.2~0.3 Wm(-1)K(-1) smaller than volcanic ash soils, and it showed the same tendency as leaf mold.
キーワード Shirakami Mountains Thermal conductivity Twin transient-state cylindrical-probe method Volumetric water content
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2006-03-15
11巻
1号
開始ページ 89
終了ページ 92
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313628