JaLCDOI 10.18926/ESR/53194
Sort Key 5
タイトル(別表記) Aerosol observation at Okayama with Skyradiometer and LIDAR
フルテキストURL esr_021_1_013_021.pdf
著者 永松 慎平| 江川 大貴| 塚本 修|
抄録  Aerosol is one of the controlling parameter for the global climate and also effects on local health hazards. The measurement of the aerosol was originally carried out as in-situ sampling and mass weight measurement including chemical analysis. Recently, remote sensing method is applied as satellite remote sensing and surface based remote sensing. Skyradiometer and LIDAR are surface based remote sensing system. Skyradiometer measures solar radiation as direct and scattered solar radiation affected by aerosols. LIDAR emit laser beam upward and it is backscattered by overlying aerosols. The backscattered light is received by a telescope and vertical distributions of the aerosols are obtained. These measurements require atmospheric radiation physics.  A Skyradiometer and a LIDAR were operated continuously at Okayama University campus and aerosol parameters were obtained from both of the system. Seasonal variations of the AOT (Aerosol Optical Thickness) and Angstrom parameter (α) are evaluated. During some dust events (e.g. yellow sand and PM2.5), time variations of these parameters were identified from both of the measurement system.
キーワード Aerosol Skyradiometer LIDAR Aerosol Optical Thickness (AOT)
出版物タイトル Okayama University Earth Science Report
発行日 2014-12-27
21巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences, Faculty of Science, Okayama University
開始ページ 13
終了ページ 21
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 Japanese
著作権者 © 2014 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
査読 無し
NAID 120005567873
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/52166
Sort Key 5
タイトル(別表記) A case study on the rainfall distribution over the Japan Islands associated with the approach of Ty0423 in late October (Comparison with that for Ty0418)
フルテキストURL esr_020_1_013_024_rev.pdf
著者 佐竹 愛| 加藤  内藏進| 盛 宣誠| 合田 泰弘| 池田 祥一郎| 塚本 修|
抄録 Rainfall distribution in the Japan Islands associated with the approach of Typhoon No.23 around 20 October 2004 (referred to Ty0423, hereafter) showed considerably different features from those in late summer of this year. The present study examined the detailed rainfall features around the Japan Islands brought by Ty0423 and the atmospheric processes based on the operational observation data by the Japan Meteorological Agency (JMA), comparing with those in association with Ty0418 around 7 September 2004. During the stage when Ty0423 was approaching or landing on the western part of the Japan Islands, the areal mean precipitation from Kyushu to Kanto District attained much larger than that for Ty0418, with wider extension of the area with the large amount of precipitation. It is interesting that, although the intense rainfall was observed only at the upstream side of the mountain range from Kyushu to Honshu District for Ty0418 except for the area near its center, strong rainfall with 10~30 mm/h persisted in wider regions from the western to the eastern part of the Japan Islands, resulting in the considerably large total rainfall for Ty0423. As for the case for Ty0423, the surface front with stable frontal surface was located just to the east of the Ty0423 center just before its landing at the Japan Islands. Thus, the huge moisture inflow mainly in the eastern region from the typhoon center seems to be redistributed widely over the Japan Islands area associated with the large-scale convergence around the stable frontal surface. In late October, the colder air associated with the high pressure system in the eastern Siberia can cover the northern part of the Japan Sea area as the seasonal march. Such basic field might be favorable for sustaining the synoptic-scale front just around the southern coast of the Japan Islands, even when the strong southerly wind invades associated with the typhoon approach there.
キーワード Ty0423 Ty0418 rainfall in Japan associated with a typhoon in mid-autumn effects of a typhoon on the synoptic climatology in Japan in October
備考 ※p.18第7図が左右逆であったのを修正(Figure of the left and the right in p.18 FIG.7 was supposed to reverse. This version was corrected.)
出版物タイトル Okayama University Earth Science Report
発行日 2013-12-27
20巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences, Faculty of Science, Okayama University
開始ページ 13
終了ページ 24
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 Japanese
著作権者 © 2013 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
査読 無し
NAID 120005394594
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/49212
Sort Key 8
タイトル(別表記) A case study on persistent appearance of the ensemble of precipitation bands in the warm sector of the Baiu front in the western Japan around 19 June 2001
フルテキストURL esr_019_1_039_050.pdf
著者 合田 泰弘| 加藤 内藏進| 塚本 修|
抄録 A case study on persistent appearance of the ensemble of precipitation bands in the warm sector of the Baiu front in Kyushu District, the western part of Japan around 19 June 2001 was performed based on the operational observational data. Around 00UTC (09JST) 19 June when the Baiu front on the surface weather map was still located about a few 100kms to the north of Kyushu, the number and the total area of the meso-β or γ-scale line-shaped precipitation bands increased around Kyushu rapidly. These precipitation bands had been sustained there and gradually gathered each other to change into the Baiu frontal precipitation zone extending from the northern Kyushu to Seto-Naikai (Seto Inland Sea) around 09UTC (18JST) 19 June (the intense rainfall zone was still located in the warm sector of the Baiu front). Until ~09UTC (18JST) 19 June, the moist air flow with the latently unstable stratification had been sustained around Kyushu corresponding to the low-level southerly wind toward the surface Baiu front to the north of Kyushu. This large-scale situation would contribute greatly to the maintenance of the ensemble of the line-shaped precipitation bands in the warm sector of the Baiu front.
キーワード ensemble of line-shaped precipitation bands precipitation in the warm sector of the Baiu front Baiu fronal rainfall
出版物タイトル Okayama University Earth Science Report
発行日 2012-12-26
19巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences, Faculty of Science, Okayama University
開始ページ 39
終了ページ 50
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 Japanese
著作権者 © 2012 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
査読 無し
NAID 120005232330
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/47748
Sort Key 5
タイトル(別表記) Characteristics of typhoon tracks and large-scale atmospheric fields associated with the typhoon approach to the Japan Islands in early summer
フルテキストURL esr_018_1_011_018.pdf
著者 濱本 奈津美| 加藤 内藏進| 中山 祐貴| 塚本 修|
抄録 The number of typhoons approaching the Japan Islands is much smaller in May and June than in August to September. However, some typhoons abnormally approach to the Japan Islands in May or June as in 2004. The present study investigated the characteristics of the typhoon tracks and the large-scale fields in May and June associated with the approach of typhoons to the Japan Islands. Climatologically speaking, typhoons are generally formed in the lower latitude in May and early June, and tend to turn to ENE-ward before they reach ~ 20N in May by the upper- and middle-level westerly wind. In June, the upper-level easterly wind associated with the Tibetan high seems to prevent typhoons from approaching to the Japan Islands. However, when the cell-type subtropical high and the deep westerly trough in its western side are formed with the SW-ly from the lower to the middle latitude, a favorable situation for the northward invasion of the typhoon can be realized in May. On the other hand, the formation of the barotropic-like subtropical high to the southeast of the Japan Islands seems to enable a typhoon to approach to the Japan Islands by the S-ly wind around the subtropical high.
キーワード typhoon tracks in early summer large-scale atmospheric fields in early summer
出版物タイトル Okayama University Earth Science Report
発行日 2011-12-26
18巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences, Faculty of Science, Okayama University
開始ページ 11
終了ページ 18
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 Japanese
著作権者 © 2011 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
査読 無し
NAID 120003796476
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/15034
Sort Key 5
タイトル(別表記) 中国寧夏地域における日照時間から日積算日射量の推定
フルテキストURL 015_079_086.pdf
著者 楊 勤| 塚本 修|
抄録 For the estimation of daily solar radiation from sunshine duration, observation data of Yinchuan station in Ningxia, China was used. Using a linear relationship between solar radiation and extraterrestrial radiation including relative sunshine duration and daylength, we obtained local coefficients s a =0.18, s b =0.62 from past five years data(1981-1985). Using the same method, coefficients for Guyuan region were confirmed too as a representative of south part of Ningxia province. Applying the local coefficients and calculation formula of solar radiation, we validated daily solar radiation of two years(1986-1987) of Yinchuan station and four years(1991-1994) of Guyuan station. The results showed high correlation coefficients of R2=0.94 in Yinchuan and R2=0.85 in Guyuan. Error analysis was applied using mean bias error(MBE), mean absolute bias error(MABE), root mean square error(RMSE),mean absolute percentage error(MAPE) on solar radiation of Yinchuan(1973-2006) and Guyuan(1986-2006) stations. Results showed that mean absolute bias error(MABE) was less than 13% and 17% in Yinchuan station and Guyuan station respectively. Then we have applied this method to the estimation of daily solar radiation at ‘Yongning’ station(near Yinchan) with the sunshine duration data at ‘Yongning’. The estimated values were compared with observed daily solar radiation at Yinchuan as past twelve years data(1989-2000). The results showed good linear relationship with high correlation coefficient of R2= 0.88.
キーワード Daily solar radiation Extraterrestrial radiation Relative sunshine duration Local coefficient
出版物タイトル Okayama University Earth Science Report
発行日 2009-03-31
15巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences, Faculty of Science, Okayama University
開始ページ 79
終了ページ 86
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 English
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
査読 無し
NAID 120002307142
Eprints Journal Name esr
著者 河野 雄彦| 山下 栄次| 野上 晃正| 塚本 修|
発行日 1999-09-20
出版物タイトル Okayama University Earth Science Report
6巻
1号
資料タイプ 紀要論文
著者 高橋 聡司| 塚本 修| 石田 廣史| 米山 邦夫|
発行日 2000-09-20
出版物タイトル Okayama University Earth Science Report
7巻
1号
資料タイプ 紀要論文
著者 上甲 実| 清原 康友| 塚本 修|
発行日 2002-09-20
出版物タイトル Okayama University Earth Science Report
9巻
1号
資料タイプ 紀要論文
著者 楊 勤| 塚本 修|
発行日 2002-09-20
出版物タイトル Okayama University Earth Science Report
9巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/13863
Sort Key 3
タイトル(別表記) Increase Rate of fCO2 in the Eastern Equatorial Pacific Ocean
フルテキストURL earth_science_reports_011_1_15.pdf
著者 近藤 文義| 塚本 修| 渡邉 修一|
抄録 In the Eastern Equatorial Pacific Ocean, increase rates of fCO2 in the air and the ocean were evaluated using the CDIAC data set. The fCO2 in the air was increasing about 1.28μatm/year during 1957-1995. This result is almost same as the rate at the Mauna Loa, Hawaii in Tropical Pacific Ocean. The increase rate of fCO2 in the seawater was estimated as 1.64μatm/year. In this study it is found that the increase rate of fCO2 in the seawater is the almost same as that of fCO2 in the air. This reault supports the result on the snapshot analysis of Takahashi et al. (1983) in thr North Atlantic Ocean during 1958-1982. It is smaller than the result including seasonal variation in the Eastern Subtropical Pacific Ocean. These reault indicated that the anthropogenic CO2 in the air has affected fCO2 in seawater through CO2 gas exchange between the atmosphere and the ocean. It is found that fCO2 in the seawater has increased in the Eastern Equatiorial Pacific Ocean in spite of the large CO2 source region. It suggested that CO2 source potential has not changed in this ocean durung 1957-1995.
キーワード fCO2 Increase Rate Eastern Equatorial Pacific Ocean E1 Nino La Nina
出版物タイトル Okayama University Earth Science Report
発行日 2004-12-31
11巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences Faculty of Science, Okayama University
開始ページ 15
終了ページ 22
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310498
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/13856
Sort Key 5
タイトル(別表記) Local wind storm (Hirodo-kaze) in northern Okayama caused by Typhoon 0421 & 0423
フルテキストURL ESR_12_39.pdf
著者 片岡 文恵| 塚本 修|
抄録 In 2004, ten typhoons had landed over Japan and a lot of damages were reported due to heavy rain, storm surge and wind storms. In the north eastern part of Okayama prefecture, local high wind "Hirodo-kaze" caused severe wind damages due to typhoon passage. During Typhoon 0421, high winds were recoreded in the south foot of Mt.Nagi as typical local wind atrom, " Hirodo-kaze". While, during Typhoon 0423, severe wind damages expanded west of the typical Hirodo-kaze srea as well as a new extreme. In the present report, a lot of surface meteorological data were coollected and compared the meteorological fields among two typhoons.  
キーワード Wind Storm Hirodo-kaze Typhoon Local high wind
出版物タイトル Okayama University Earth Science Report
発行日 2005-12-31
12巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences Faculty of Science, Okayama University
開始ページ 39
終了ページ 47
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310608
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/13855
Sort Key 4
タイトル(別表記) 中国淮河流域付近の入梅前の時期における大気場や陸面状態の季節進行 (1998年の事例解析)
フルテキストURL ESR_12_31.pdf
著者 池田 祥一郎| 加藤 内藏進| 塚本 修|
抄録  Seasonal evolution of atmospheric and land surface conditions around the Huaihe River Basin in China in the pre-Meiyu stage of 1998 were examined, mainly based on the GAME re-analysis data. Around the Huaihe River Basin in China (just to the nront of the Changjiang River Basin), although the air temperature increased rapidly already in early June (the Meuyu front was located to the south of that region), the specific humidity did not increas so much at time. In addition, the latent heat supplied from the ground there decreased from late May to early June, compared to that before early May. The time mean southerly wind component across the low-level baroclinic Zone (although not so strong as in the mature stage of the Meiyu) invaded into Central Cjina during late April to early May. On the other hand, the relatively strong wind region once retreated southward in the middle of May associated with the onset of the Southeast Asian monsoon, and the calm wind region with frequent appearance of the surface high was seen around the Huaihe River Basin from late May to early June. Thus the present study shows that the Huaihe River Basin once experiences the rather drier stage just before the onset stage of the mature Meiyu there.
キーワード arid region in China and the Meiyu front seasonal evlution in East Asia Land surface condition around the Meiyu front
出版物タイトル Okayama University Earth Science Report
発行日 2005-12-31
12巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences Faculty of Science, Okayama University
開始ページ 31
終了ページ 37
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 English
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310602
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/13828
Sort Key 1
タイトル(別表記) Storm surge in the Seto Inland Sea accompanied by Typhoons in 2004
フルテキストURL earth_science_reports_014_1_1.pdf
著者 淺沼 友光| 塚本 修| 小川 貢司|
抄録 In 2004, Seto Inland Sea coast suffered severe damages of storm surge. This area never experienced storm surge damage in recent half century and people were not ready for the storm surge. In two typhoons of T0416 and T0418, surge anomaly were more than 150cm in Bisan-Seto area. Storm surges appeared after the maximum approach of typhoon not only due to surface low pressure but also due to wind stress as westerly. Because of geographical complexity of Seto Inland Sea, the surge process have not been well understood. Therefore, it is necessary to study the effects of the wind and the surface pressure using a numerical model. Atmospheric model MM5 and ocean model POM were used as a numerical experiment, including the astronomical tide model NAO. As the results of numerical simulation of the storm surge, atmospheric conditions were well simulated but ocean model was rather complex. There are a lot of island in Seto Inland Sea and sea water movement in the model was very much influenced by the topography and wind stress effect appeared much smaller. In the no-island model, storm surge height was a little improved. However the simulated surge height was still less than the observed height. Further improvement of the ocean model application should be considered in future studies.
キーワード Typhoon Storm Surge Seto Inland Sea surface pressure wind stress
出版物タイトル Okayama University Earth Science Report
発行日 2008-03-31
14巻
1号
出版者 岡山大学理学部地球科学教室
出版者(別表記) Department of Earth Sciences, Faculty of Science, Okayama University
開始ページ 1
終了ページ 9
ISSN 1340-7414
NCID AN10506284
資料タイプ 紀要論文
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310572
Eprints Journal Name esr