著者

Fumiaki Fujibe Jun Matsumoto

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.17, pp.220-223, 2021 (Released:2021-12-14)

参考文献数

24

被引用文献数

4

---

Using vital statistics data from 1995 to 2019, the relationships among interannual variations of total mortality, heat-stroke mortality, and temperature in summer were assessed in an attempt to estimate excess deaths in hot summer years in Japan. The number of deaths in July and August increased by 1.1% for each 1°C increment of summer mean temperature over Japan, with an eight-fold larger range of interannual variation than the more narrowly defined heat-stroke deaths. This fact implies that excess deaths due to heat are about eight times more prevalent than heat-stroke deaths and can be on the order of 10,000 in a hot summer year. Analyses by age group and cause of death indicated that excess deaths are largely associated with cardiovascular and respiratory diseases among elderly people.

著者

Fumiaki Fujibe Jun Matsumoto Hideto Suzuki

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.14, pp.144-147, 2018 (Released:2018-10-17)

参考文献数

14

被引用文献数

14

---

Relationships between daily heat-stroke mortality and temperature were statistically analyzed using Vital Statistics data for 1999 to 2016, with attention to regional differences related to different climate zones. An analysis based on data categorized for each prefecture has revealed that the daily heat-stroke mortality depends not only on daily temperature but also on the summer mean temperature in a way that a prefecture in a cooler summer climate tends to show a higher mortality for a specified value of daily temperature, implying the effect of acclimatization. Additionally, daily heat-stroke mortality is found to be higher for cases of higher temperature on preceding few days to a week, apparently due to accumulated heat stress, but is lower for cases of higher temperature a few weeks ago, presumably due to acclimatization. As for relative humidity, the mortality on a day of higher humidity tends to be higher for a specified value of daily maximum temperature, but lower for a specified value of daily mean temperature. It is also shown that heat-stroke mortality tends to be high on a day of low wind speed and long sunshine hours.

著者

Anu Gupta Jun Matsumoto

出版者

公益社団法人 日本気象学会

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.18, pp.211-217, 2022 (Released:2022-09-28)

参考文献数

19

---

This study investigated the spatial and temporal modulation of aerosol species by monsoon intraseasonal oscillation (MISO) using the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations from 2003 to 2019. The climatological spatial distribution of aerosol species showed long-range transport of sea-salt and dust to Indian landmass from the Arabian Sea and desert regions of the Arabian Peninsula, respectively. While organic matter, black carbon, and sulfate originated mainly in India. In the eight MISO phases, southwesterly/westerly strengthening/weakening was responsible for aerosol species transport and spatial distribution. During MISO break to active transition phases 2-5, strong southwest monsoon winds transported sea-salt aerosols from the Arabian Sea to the Indian region. In the active-to-break transition phases 5-7, dust transport strengthened from the Arabian Peninsula. The dust aerosols over the Indian subcontinent peaked in phases 6 and 7. In phases 2-5 (6-8, 1), direction of strong winds along the Indo-Gangetic Plain influenced increased levels of organic matter, sulfate, and black carbon aerosols in the western/northwestern (eastern/northeastern) regions of India. These dynamic spatial changes in aerosols caused by MISO over the Indian region influence the shortwave and longwave radiation balances that can influence monsoon circulation.

著者

Long Trinh-Tuan Jun Matsumoto Fredolin T. Tangang Liew Juneng Faye Cruz Gemma Narisma Jerasorn Santisirisomboon Tan Phan-Van Dodo Gunawan Edvin Aldrian Thanh Ngo-Duc

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.15, pp.1-6, 2019 (Released:2019-01-19)

参考文献数

38

被引用文献数

7 27

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The Quantile Mapping (QM) bias correction (BC) technique was applied for the first time to address biases in the simulated precipitation over Vietnam from the Regional Climate Model (RegCM) driven by five Coupled Model Intercomparison Project Phase 5 (CMIP5) Global Climate Model (GCM) products. The QM process was implemented for the period 1986-2005, and subsequently applied to the mid-future period 2046-2065 under both Representative Concentration Pathway (RCP) 4.5 and RCP 8.5. Comparison with the original model outputs during the independent validation period shows a large bias reduction from 45% to 3% over Vietnam and significant improvements in representing precipitation indices (PI) after applying the QM technique. Moreover, the ensemble average of the BC products generally performed better than an individual BC member in capturing the spatial distribution of the PIs. A drier condition with a longer rainfall break, and shorter consecutive rainfall events are anticipated over Northern and Central Vietnam during their respective wet seasons in the mid-future. Furthermore, this study showed that the QM method minimally modified the future changes in PIs over most of Vietnam; thus, these corrected projections could be used in climate impacts and adaptation studies.

著者

Anu Gupta Jun Matsumoto

出版者

公益社団法人 日本気象学会

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

pp.2022-034, (Released:2022-08-26)

---

This study investigated the spatial and temporal modulation of aerosol species by monsoon intraseasonal oscillation (MISO) using the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations from 2003 to 2019. The climatological spatial distribution of aerosol species showed long-range transport of sea-salt and dust to Indian landmass from the Arabian Sea and desert regions of the Arabian Peninsula, respectively. While organic matter, black carbon, and sulfate originated mainly in India. In the eight MISO phases, southwesterly/westerly strengthening/weakening was responsible for aerosol species transport and spatial distribution. During MISO break to active transition phases 2-5, strong southwest monsoon winds transported sea-salt aerosols from the Arabian Sea to the Indian region. In the active-to-break transition phases 5-7, dust transport strengthened from the Arabian Peninsula. The dust aerosols over the Indian subcontinent peaked in phases 6 and 7. In phases 2-5 (6-8, 1), direction of strong winds along the Indo-Gangetic Plain influenced increased levels of organic matter, sulfate, and black carbon aerosols in the western/northwestern (eastern/northeastern) regions of India. These dynamic spatial changes in aerosols caused by MISO over the Indian region influence the shortwave and longwave radiation balances that can influence monsoon circulation.

著者

Miki Hattori Jun Matsumoto Shin-Ya Ogino Takeshi Enomoto Takemasa Miyoshi

出版者

(公社)日本気象学会

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.12, pp.75-79, 2016 (Released:2016-03-08)

参考文献数

17

被引用文献数

7

---

The impact of additional radiosonde observations during the Vietnam-Philippines Rainfall Experiment 2010 (VPREX2010) was investigated by performing observing system experiments using the local ensemble transform Kalman filter (LETKF) and the atmospheric general circulation model for the Earth Simulator (AFES). During the experimental period from 15 September to 15 October, 2010, a westward-propagating disturbance was developed in the South China Sea and caused heavy rainfall on the east coast of Vietnam and Hainan Island. By assimilating the additional radiosondes, significant increases in wind speed, temperature and specific humidity were detected in the lower troposphere around the disturbance. In addition, the analysis ensemble spread for meridional wind decreased by 5-25% across the Indochina Peninsula, Philippines Sea and western Pacific to the south of Japan. Moreover, winds became stronger around the disturbance due to the additional observations, and the ensemble spread for wind speed became larger. The results show that the disturbance in an early stage of development was not well detected in the South China Sea without the use of additional radiosonde observations. Therefore, it is suggested that continuous and intensive radiosonde observations in Vietnam and the Philippines are essential for the improvement of the objective analysis of such disturbances.

著者

Fumiaki Fujibe Jun Matsumoto

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

pp.2021-038, (Released:2021-10-13)

被引用文献数

4

---

Using vital statistics data from 1995 to 2019, the relationships among interannual variations of total mortality, heat-stroke mortality, and temperature in summer were assessed in an attempt to estimate excess deaths in hot summer years in Japan. The number of deaths in July and August increased by 1.1% for each 1°C increment of summer mean temperature over Japan, with an eight-fold larger range of interannual variation than the more narrowly defined heat-stroke deaths. This fact implies that excess deaths due to heat are about eight times more prevalent than heat-stroke deaths and can be on the order of 10,000 in a hot summer year. Analyses by age group and cause of death indicated that excess deaths are largely associated with cardiovascular and respiratory diseases among elderly people.

著者

松本 純 Jun Matsumoto

雑誌

松山大学論集 = Matsuyama University review (ISSN:09163298)

巻号頁・発行日

vol.14, no.3, pp.87-112, 2002-08-01

著者

Peiming Wu Masayuki Hara Hironori Fudeyasu Manabu D. Yamanaka Jun Matsumoto Fadli Syamsudin Reni Sulistyowati Yusuf S. Djajadihardja

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.3, pp.93-96, 2007 (Released:2007-09-13)

参考文献数

10

被引用文献数

38 67

---

Torrential rains that repeatedly occurred over Java Island causing widespread floods in late January and early February 2007 coincided with a strong and persistent trans-equatorial monsoon flow from the Northern Hemisphere. While convections develop frequently over the island’s mountainous areas in the afternoon, convections over the northern plains are active during the night and morning hours. The strong trans-equatorial monsoon flow with an upper southeasterly wind produces a strong low-level vertical shear of wind and dry mid-level environment over the island. These conditions allow the severe convections to occur repeatedly for days and to sustain for an extended period of time. The results suggest that the trans-equatorial monsoon flow plays a principal role in the formation of the repeated torrential rains. The probability of occurrence of a strong and persistent trans-equatorial monsoon flow that causes torrential rains and widespread floods over Java Island is estimated to be once every 5-10 years.

著者

Haruhisa ASADA Jun MATSUMOTO Rezaur RAHMAN

出版者

The Association of Japanese Geographers

雑誌

地理学評論 (ISSN:13479555)

巻号頁・発行日

vol.78, no.12, pp.783-793, 2005-10-01 (Released:2008-12-25)

参考文献数

27

被引用文献数

7 14

---

The long-term variations of rice production in Bangladesh are examined in the latter half of the 20th century and the impact of recent severe floods is discussed. Unprecedented severe floods, which submerged nearly two thirds of the country, occurred recently in Bangladesh in 1988 and 1998, and the effects of these severe floods to rice cropping are revealed. In these severe flood years, the rainy season crop aman drastically declined in production due to the decrease of the cultivated area and yield. On the other hand, the dry season crop boro, which is planted after the flood withdrawal, increased its production much higher than that of the previous year, mainly because of utilization of the residual flood water. In terms of total annual rice production, it turns out that severe floods have even a positive effect on rice production in Bangladesh. Furthermore, rice production after these severe flood years is higher than that of the previous years, suggesting that severe floods may act as a trigger for increasing rice production level through the change of the hydrological environment and farmers' reaction to it.

著者

Ha Pham-Thanh Thanh Ngo-Duc Jun Matsumoto Tan Phan-Van Hoa Vo-Van

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.16, pp.169-174, 2020 (Released:2020-09-17)

参考文献数

21

被引用文献数

9

---

This study investigated rainfall trends and their associations with tropical cyclones (TCs) during the period of 1979-2019, using TC best-track data from the Regional Specialized Meteorological Center Tokyo - Typhoon Center and daily rainfall data from 138 meteorological stations in Vietnam. The radius of influence of TCs on local rainfall was limited to 500 km from TC centers. The average annual number of TCs affecting Vietnam has decreased slightly in the last two decades compared to previous decades. The ratio of TC-induced rainfall to total rainfall attained the highest value of 37.3% in the central region, in July. The temporal distribution of TC-induced rainfall coincided with the frequency of TCs, with an active period from June to November. During 1979-2019, the non-TC rainfall was the main contributor to the change in total rainfall, especially in relation to the decline in the north and the increase in the coastal South Central region. The rainfall trend during the entire period was principally explained by the interdecadal shift in the late 1990s. Rainfall intensity and the number of heavy rainfall days were intensified for total rainfall and non-TC rainfall, indicating that TCs contributed minimally to the changes of extreme rainfall events during 1979-2019.

著者

Ha Pham-Thanh Thanh Ngo-Duc Jun Matsumoto Tan Phan-Van Hoa Vo-Van

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

pp.2020-029, (Released:2020-08-11)

被引用文献数

9

---

This study investigated rainfall trends and their associations with tropical cyclones (TCs) during the period of 1979-2019, using TC best-track data from the Regional Specialized Meteorological Center Tokyo - Typhoon Center and daily rainfall data from 138 meteorological stations in Vietnam. The radius of influence of TCs on local rainfall was limited to 500 km from TC centers. The average annual number of TCs affecting Vietnam has decreased slightly in the last two decades compared to previous decades. The ratio of TC-induced rainfall to total rainfall attained the highest value of 37.3% in the central region, in July. The temporal distribution of TC-induced rainfall coincided with the frequency of TCs, with an active period from June to November. During 1979-2019, the non-TC rainfall was the main contributor to the change in total rainfall, especially in relation to the decline in the north and the increase in the coastal South Central region. The rainfall trend during the entire period was principally explained by the interdecadal shift in the late 1990s. Rainfall intensity and the number of heavy rainfall days were intensified for total rainfall and non-TC rainfall, indicating that TCs contributed minimally to the changes of extreme rainfall events during 1979-2019.

著者

Kayori MAENO Hiroo OHMORI Jun MATSUMOTO Taiichi HAYASHI

出版者

Tokyo Geographical Society

雑誌

Journal of Geography (Chigaku Zasshi) (ISSN:0022135X)

巻号頁・発行日

vol.113, no.4, pp.512-523, 2004-08-25 (Released:2009-11-12)

参考文献数

23

被引用文献数

2 1

---

This paper analyzes the characteristics of daily precipitation during the monsoon season from June to September for 21 years from 1976 to 1996 in Nepal, which is situated in the southern Himalaya. The average monsoon precipitation, and the number of rainy days in Nepal are 1, 410 mm, and 73 days, respectively. On the basis of the total monsoon precipitationand the number of rainy days, 1978, 1984, and 1985 are classified as wet years, and 1977, 1979, and 1992 are classified as dry years. Nepal is divided into six regions on the basis of the statistical characteristics of total monsoon precipitation and number of rainy days.On the other hand, the distribution pattern of 5-year probable rainfall in Nepal, is considerably different from that of average monsoon precipitation. Five-year probable rainfall is small in northern Nepal, and becomes large toward the south. On the basis of 5-year probable rainfall, which is regarded to be the threshold value of heavy rainfall in Nepal, heavy rainfall occurred more frequently in 1981 and 1987. These years did not agree with the wet years based on total precipitation and number of rainy days, indicating that the occurrence of heavy rainfall that causes water hazards in Nepal does not synchronize with wet years.

著者

Jun MATSUMOTO Kiyotoshi TAKAHASHI

出版者

The Association of Japanese Geographers

雑誌

Geographical review of Japan, Series B (ISSN:02896001)

巻号頁・発行日

vol.72, no.2, pp.193-201, 1999-12-01 (Released:2008-12-25)

参考文献数

10

被引用文献数

10 11

---

Regional differences of daily rainfall characteristics are examined during the East Asian summer monsoon season (May to August) over a 30-year (1961-90) period. It is found that the contribution of heavy rainfall with a daily total >50mm to total seasonal precipitation exceeds 50% around Taiwan, in the northwestern part of Kyushu Island, coastal Southwest Japan, and the southern coast of China. It exceeds 40% in northern Korea, the middle of the Yangtze and lower Huai-he River Basins. On the other hand, daily rainfall characteristics in Southwest, Northwest and North China are quite different from these regions. In Southwest China, although seasonal total precipitation is considerably large (>1000mm), the contribution of daily heavy rainfall to total precipitation is only less than 20% to the west of 105°E. In Northwest China, both total precipitation and contribution of daily heavy rainfall to total precipitation are small. In North China, precipitation by weak daily rainfall with a daily total <20mm is relatively high. The seasonal changes of heavy rainfall events are also examined. In general, the area of both maximum precipitation and heavy rainfall occurrence progresses northward from early June to late July in the major part of both East China and Japan in accordance with northward displacement of Baiu/Meiyu season. But some different features are found to the west of _??_110°E in China.

著者

Genki Usui Yohei Takayama Hirotsugu Hashimoto Takehiro Katano Masahiro Yanagiya Masashi Kusakabe Tamaki Miura Jun Matsumoto Hajime Horiuchi Seiji Okubo

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

pp.1962-18, (Released:2018-12-18)

参考文献数

19

被引用文献数

17

---

Postoperative cerebral embolism after left upper lobectomy caused by a thrombus in the pulmonary vein stump (PVS) is a serious complication. However, it is unclear if cerebral embolism can develop after other types of lobectomy. We present a case of a 68-year-old man with cerebral embolism after left lower lobectomy with a longer PVS than normal. There were no clinically suspected sources for the thrombus except for the PVS. This thrombus seemed to have formed in the PVS. The endovascularly removed thrombus contained scattered nuclear debris around neutrophils, suggesting a physiological response caused by tissue injury.

著者

Jun MATSUMOTO Chisato OKAMOTO Yusuke OKI Takuma NAKAMURA Jun AOKI

出版者

THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

雑誌

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN (ISSN:18840485)

巻号頁・発行日

vol.16, no.7, pp.698-705, 2018 (Released:2018-11-04)

参考文献数

18

被引用文献数

1

---

The Japan Aerospace Exploration Agency is now planning a Jupiter Trojan asteroid exploration mission using a 40 m-wide solar power sail spacecraft. In this mission, a 100 kg lander is soft-landed on an asteroid in order to perform in-situ analysis of asteroid samples by a mass spectrometer. In this mission, not only surface sampling, but also sub-surface sampling up to a depth of 1 m, will be performed. In the present paper, a sampling scenario including sub-surface sampling is proposed that does not require an anchoring system and that omits contamination from the analyzed sample. In this scenario, newly developed sampling instruments are implemented. In addition, ground experiments have been performed using these sampling instruments, surface sampling instruments, and sub-surface sampling instruments. The results of these experiments indicate that the sample mass required for in-situ analysis can be collected and that the proposed scenario is realistic and practical.

著者

Hiroki OKANISHI Jun MATSUMOTO Sadao NOGAMI Yumiko KAGAWA Toshihiro WATARI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

vol.75, no.7, pp.991-994, 2013 (Released:2013-07-31)

参考文献数

20

被引用文献数

1

---

An 8-year-old male Shiba dog presented with chronic vomiting and diarrhea. Upper gastrointestinal endoscopy revealed severe enteritis and infection of the duodenal mucosa with Echinostoma hortense. We performed therapy for parasites and enteritis. The therapy was successful for deworming and temporarily improved the symptoms, but the dog died soon thereafter. To the authors’ knowledge, this is the first case report of an antemortem diagnosis of E. hortense infection in a dog.

著者

Hiroki OKANISHI Jun MATSUMOTO Hiromi AOKI Yumiko KAGAWA Kazushi ASANO Sadao NOGAMI Toshihiro WATARI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.13-0116, (Released:2013-07-24)

被引用文献数

1 5

---

A 13-year-old female Labrador Retriever presented with chronic regurgitation. Radiography and computed tomography (CT) revealed nodules in the caudal esophagus. Upper gastrointestinal endoscopy followed by histopathological examination revealed esophageal granulomas caused by Spirocerca lupi. The infection was treated with milbemycin oxime. The therapy was successful, and a remarkable reduction in granulomas was observed. This case report describes the diagnostic imaging findings and treatment outcome of a dog with S. lupi infection in Japan.

著者

Hiroki OKANISHI Jun MATSUMOTO Sadao NOGAMI Yumiko KAGAWA Toshihiro WATARI

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.12-0518, (Released:2013-03-01)

被引用文献数

1

---

An 8-year-old male Shiba dog presented with chronic vomiting and diarrhoea. Upper gastrointestinal endoscopy revealed severe enteritis and infection of the duodenal mucosa with Echinostoma hortense. We performed therapy for parasites and enteritis. The therapy was successful for deworming, and temporarily improved the symptoms, but the dog died soon thereafter. To the authors’ knowledge, this is the first case report of an ante mortem diagnosis of E. hortense infection in a dog.