JaLCDOI 10.18926/fest/54863
タイトル(別表記) Evaluation of drop in official air temperature record at Okayama caused by relocation of observation field of Okayama Local Meteorological Observatory - By comparison with records observed at surrounding points -
フルテキストURL fest_022_061_064.pdf
著者 三浦 健志| 上田 悠生| 守田 秀則| 近森 秀高| 黒川 正宏| 中嶋 佳貴| 沖 陽子|
抄録 Statistical change in official temperature records at Okayama City caused by relocation of meteorological observation field of Meteorological Agency was evaluated. The observation field of Okayama local meteorological observatory was moved to the Tsushima Campus of Okayama University from the downtown area of Okayama City in March, 2015. Comparison between the air temperature records measured at meteorological agency station and the records at Tanjo Pond in Tsushima Campus, showed 0.56 ℃ drop in annual average before and after relocation. Moreover, comparison between the records of Okayama local meteorological observatory and that at the surrounding meteorological observing 9 stations showed 0.55 ℃ drop in annual average. Those results suggest that the relocation dropped annual average of air temperature by about 0.6 ℃.
キーワード Okayama Local Meteorological Observatory relocation drop in air temperature
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 61
終了ページ 64
ISSN 2187-6940
言語 Japanese
論文のバージョン publisher
NAID 120005997444
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
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 Takahashi, Sin-Ei| Miura, Takeshi| Hatori, Osamu|
発行日 2004-01
出版物タイトル Mathematical Journal of Okayama University
46巻
1号
資料タイプ 学術雑誌論文
著者 Miura, Takeshi|
発行日 2002-01
出版物タイトル Mathematical Journal of Okayama University
44巻
1号
資料タイプ 学術雑誌論文
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
著者 猪原 幸子| 岩田 徹| 三浦 健志|
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
著者 牛川 希望| 岩田 徹| 三浦 健志|
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/11635
フルテキストURL 001_169_179.pdf
著者 Abenney-Mickson Stephen| 三浦 健志|
抄録 The SWAP93 model was used to predict how much capillary rise would occur in cropped fields. The experimental fields were located in a humid climate and it was thought that contribution from groundwater sources to total water use could be significant. In one field planted with soybean, the model predicted an average daily uptake of 1.3 mm; in another field planted with pumpkin, there was average daily uptake of 0.3 mm; and yet in a third field located in a vinyl house there was average daily uptake of 0.03 mm. These predictions represent about 38,7 and 1% contribution to total water use respectively. Even though there were no measured data to compare with, the results lie within the range of other works reported in the literature.
キーワード Crop water use capillary rise SWAP93 model groundwater
出版物タイトル 岡山大学環境理工学部研究報告
発行日 1996-03
1巻
1号
開始ページ 169
終了ページ 179
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313364
JaLCDOI 10.18926/fest/11628
タイトル(別表記) Secular changes of air temperature and precipitation in Okayama City.
フルテキストURL 001_163_168.pdf
著者 三浦 健志|
抄録 In this paper, secular changes of air temperature and the amount of precipitation in Okayama city are discussed using observed values at Okayama meteorologiccal station. Special reference is made to 1993 and 1994 in which peculiar changes occurred. The results obtained are summarized as follows: (1) The increasing rate of the annual mean air temperature at Okayama city is 0.85℃/100y. This value is nearly equal to the average of Japan; 0.87℃/100y. (2) The increasing rate indicates seasonal changes, and the rate is high especially in April and May. (3) The rapid increase of the air temperature in the 1980s is due to removal of Okayama meteorological station from the edge of town to the center. (4) The annual mean air temperature in 1994 is 16.9℃, and the monthly mean temperature for July and August are 29.8 and 29.6℃ respectively. These values are new records at the Okayama station. (5) The air temperature in July and August, 1993 are higher than in 1980 when it was much colder in the summer. (6) The amount of precipitation does not show any secular changes.
キーワード the air temperature secular changes Okayama 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 1996-03
1巻
1号
開始ページ 163
終了ページ 168
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313505
JaLCDOI 10.18926/fest/11572
タイトル(別表記) Comparison of micrometeorological environments inside and outside a watermelon plastic greenhouse
フルテキストURL 003_121_126.pdf
著者 森田 昇| 三浦 健志|
抄録 The use of glass and plastic greenhouses have rapidly increased in recent years. Meteorological and soil moisture environments inside a greenhouse are significantly different from those in the open field. These differences should be understandable to establish accurate predictions of water consumption and evapotranspiraton inside a greenhouse which play impotrant roles in the design of any irrigation system. This study aims to estimate the micrometeorological conditions inside a watermelon plastic greenhouse which can be used for evapotranspiration calculations. Therefore, micrometeorological data were measured inside and outside the greenhouse for the comparison purposes. The results of this study may be summarized as : (1) Solar radiation inside the greenhouse was about 70% of that of outside it. (2) Net radiation during the daytime inside the greenhouse was almost the same as the absorbed total short-wave radiation. (3) The difference of air temperature inside and outside the greenhouse was very large during the daytime whereas not much difference was observed during the nighttime. (4) Both relative humidity and saturation deficit inside the greenhouse were higher than outside in case of highly vegetative land. (5) Wind speed inside the greenhouse was almost zero, while outside the average value was 1.8m/s.
キーワード plastic greenhouse micrometeorology watermelon
出版物タイトル 岡山大学環境理工学部研究報告
発行日 1998-01-14
3巻
1号
開始ページ 121
終了ページ 126
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313884
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/11463
タイトル(別表記) Heat Budget on Rice Field
フルテキストURL 009_081_085.pdf
著者 楊 冬梅| 岩田 徹| 三浦 健志| 大滝 英治|
抄録 Experience of flux measurements over tall canopies has revealed that the eddy flux of sensible plus latent heat is about 30% smaller than the available radiant energy flux. A systematic observation was carried out to investigate the imbalance problem on rice field. The rice field represents a complex system consisting of rice plant, irrigated water and soil. Date obtained in this experiment show that appreciable understimations of sensible and latent heat fluxes are not recognized but understimations of 15 to 23% are counted in the soil heat flux.
キーワード Heat budget Eddy correlation method Sensible heat flux Latent heat flux Soil heat flux
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 81
終了ページ 85
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313468
JaLCDOI 10.18926/fest/11462
タイトル(別表記) Comparison of micrometeorological environments inside and outside an oriental pickling melon greenhouse.
フルテキストURL 012_125_130.pdf
著者 森本 祐二| 平野 絵美| 三浦 健志|
抄録 The use of greenhouses has rapidly increased after 1965, and the area became 11 times of 1965 as of 2001. Meteorological conditions and soil moisture environments inside a greenhouse are significantly different from those in the open field. These differences should be understandable to establish accurate predictions of water consumption and evapotranspiration inside a greenhouse which play important roles in the design of any irrigation system. This study aims to estimate the micrometeorological conditions inside an oriental pickling melon greenhouse which can be used for evapotranspiration calculations. Therefore, micrometeorological data were measured inside and outside the greenhouse for the comparison purposes. The results of this study may be summarized as: (1) Solar radiation inside the greenhouse was decreased about 30% of that of outside it by plastic film and frame. (2) Net radiation during the daytime inside the greenhouse was almost the same as the absorbed total short-wave radiation. (3) The difference of daytime mean air temperature inside and outside the greenhouse was between 3 and 4 degree Celsius in day average. (4) Both relative humidity and saturation deficit inside the greenhouse were higher than outside, and those were affected by ventilation. (5) Wind speed inside the greenhouse was greatly affected by opening rate of the house side.
キーワード greenhouse micrometeorology oriental pickling melon
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 125
終了ページ 130
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313863
JaLCDOI 10.18926/fest/11460
タイトル(別表記) Measurement of root system with growth of oriental pickling melon.
フルテキストURL 012_119_123.pdf
著者 平野 絵美| 森本 祐二| 三浦 健志|
抄録 It is important to clarify how the soil moisture changes by irrigation and how moisture is consumed by absorption of root, to plan irrigation appropriately in upland field. And, it is thought that clarifying the growth of the root can be important information in the water management, because the amount and the pattern of root water uptake change depending on the growth stage. However, there are not too much a lot of researches that measure the root, in addition, the example intended for crops of 'Gourd family (scientific name:Cucurbitaceae)' is not found. Therefore, for oriental pickling melon, it measured how for the root system to grow up as crop grew every three weeks. The results of this study may be summarized as: 1) Root amount increased with the growth of crops, and the majority of the root existed to 20cm in depth. A lot of rootlets with the role of water uptake existed outside of from 10 to 20cm. 2) Root length has grown up in horizontal and vertical direction at a dash at the stage of growing initial. 3) It was able to be confirmed to the growth of the ground part and the root that the length and amount either also had implications. Moreover, root amount and plant caver ratio drew similar curve.
キーワード root growth oriental pickling melon
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 119
終了ページ 123
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313695
著者 楊 冬梅| 岩田 徹| 三浦 健志|
発行日 2003-12
出版物タイトル 岡山大学農学部センター報告
25巻
1号
資料タイプ 紀要論文