Jun Matsumoto
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The Role of the Moisture Conveyor Belt in High Precipitation Events Along the Western Coast of the Philippines During the Southwest Monsoon Season Open
This study examines the role of the moisture conveyor belt (MCB) in high precipitation events (HPE) during the southwest monsoon (SWM) season in the Philippines. Using rainfall data from 11 weather stations along the country’s western coas…
Data rescue of instrumental meteorological data records of European and US Naval ship logs sailing along Japan waters during the 1850s and 1860s Open
Before the establishment of a weather station network in Japan, European and U.S. naval ships sailed along the region’s coastal waters during the 18th and 19th centuries. Weather records observed using meteorological instruments onboard th…
The Unique Features of Typhoon Rai (2021): An observational study Open
Tropical Cyclone (TC) RAI (2021) made a devastating landfall in the Siargao-Dinagat Islands of the southeastern Philippines on December 16, 2021, causing about USD 1.05B in damage, 405 reported dead and 52 missing. This TC reached a maximu…
Quantifying the influence of the <span>Madden–Julian</span> oscillation on rainfall extremes during the northeast monsoon season of the Philippines Open
This study investigates the impact of the Madden–Julian Oscillation (MJO) on the extreme rainfall events across 11 eastern coastal stations during the northeast monsoon season (November to March) over the Philippines from 1979 to 2019. The…
Long-Term Change in Heat-Related Excess Mortality in Japan Open
The relationship between summer mortality and mean temperature in Japan was analyzed using monthly data from 1951 to 2020. During this period, the mortality rate decreased greatly and the elderly population has largely increased in Japan. …
Lagged teleconnections between two types of ENSO and Southeast Asian autumn rainfall anomalies Open
The lagged teleconnections of the two types of El Niño–Southern Oscillation (ENSO) on Southeast Asian autumn rainfall (SEAAR) anomalies for lagged time varying from 12 to zero months are investigated for the period 1979 to 2019 using Singu…
Changes in intensity and tracks of tropical cyclones crossing the central and southern Philippines from 1979 to 2020: an observational study Open
Observational studies on the characteristics of tropical cyclones (TCs) crossing Mindanao and Visayas Islands, in the southern and central Philippines, respectively, remain limited. To address this research gap, this study investigates the…
Climatological characteristics of the monsoon breaks during the southwest monsoon season of the Philippines Open
This study investigates the climatological characteristics of the monsoon breaks during the southwest monsoon season (June–September) of the Philippines from 1979 to 2020. The monsoon break is defined as a period when the average rainfall …
View article: Characteristics of hailfall and lightning in a splitting thunderstorm observed on May 4, 2019 in the Tokyo Metropolitan Area, Japan
Characteristics of hailfall and lightning in a splitting thunderstorm observed on May 4, 2019 in the Tokyo Metropolitan Area, Japan Open
According to newspapers, hailfall of up to 3–4 cm in diameter was observed in the afternoon of May 4, 2019 in Tokyo, Japan. The thunderstorm cell split into two during the hailfall period, with one propagating northward with hailfall and t…
AsiaPEX: Challenges and Prospects in Asian Precipitation Research Open
The Asian Precipitation Experiment (AsiaPEX) was initiated in 2019 to understand terrestrial precipitation over diverse hydroclimatological conditions for improved predictions, disaster reduction, and sustainable development across Asia un…
Regional Features Related to Timing of Maximum and Minimum Precipitation during the Warm Season in Japan Open
Warm season precipitation in most parts of Japan comprises early summer (Baiu) and autumn (Shūrin) rainy periods with a relatively dry mid-summer. We aimed to determine details on the features of the seasonal progress of precipitation duri…
The contribution of non‐tropical cyclone vortices to the rainfall of the Philippines Open
Weaker disturbances than tropical cyclones (TCs) such as tropical depressions and cold surges can significantly induce heavy rainfall and flooding events over the Philippines. However, the analysis of these disturbances including their rai…
View article: Climatological characteristics of nocturnal eastward‐propagating diurnal precipitation peak over South India during summer monsoon: Role of monsoon low‐level circulation and gravity waves
Climatological characteristics of nocturnal eastward‐propagating diurnal precipitation peak over South India during summer monsoon: Role of monsoon low‐level circulation and gravity waves Open
This study explores the climatological diurnal cycle of precipitation during the summer monsoon season over southeast India using the Tropical Rainfall Measuring Mission (TRMM) 3G68 precipitation product from 2000 to 2014. The primary area…
View article: Cause of a Lower‐Tropospheric High‐Ozone Layer in Spring Over Hanoi
Cause of a Lower‐Tropospheric High‐Ozone Layer in Spring Over Hanoi Open
The ozonesonde observations in Hanoi, Vietnam, over 14 years since 2004, have confirmed an enhancement in lower tropospheric ozone concentration at about 3 km altitude in the spring season. We investigated the evolution of the ozone enhanc…
View article: Cause of a lower-tropospheric high-ozone layer in spring over Hanoi
Cause of a lower-tropospheric high-ozone layer in spring over Hanoi Open
The ozonesonde observations in Hanoi, Vietnam, over 14 years since 2004, have confirmed an enhancement in lower tropospheric ozone concentration at about 3 km altitude in the spring season. We investigated the evolution of the ozone enhanc…
Modulation of Spatial Distribution of Aerosol Species by the Monsoon Intraseasonal Oscillation over South Asia Open
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 Spectroradiomet…
Influence of boreal summer intraseasonal oscillation on rainfall extremes in the Philippines Open
This study investigates the impact of the northward/northwestward propagating 30–60‐day mode of the boreal summer intraseasonal oscillation (BSISO) on the extreme rainfall events in the Philippines during the June–September (JJAS) season f…
Evaluation of the Global Satellite Mapping of Precipitation (GSMaP) data on sub-daily rainfall patterns in Vietnam Open
This study aims to evaluate the performance of Global Satellite Mapping of Precipitation (GSMaP) data in observing the sub-daily rainfall patterns in Vietnam using synoptic gauge measurements considering seasonal variations in rainfall. Di…
View article: Formation of a lower-tropospheric high-ozone layer in spring over Southeast Asia
Formation of a lower-tropospheric high-ozone layer in spring over Southeast Asia Open
The ozonesonde observations in Hanoi, Vietnam, over fourteen years since 2004 have confirmed the enhancement in lower tropospheric ozone concentration at about 3 km altitude in the spring season. We investigated the evolution of the ozone …
Synoptic conditions and potential causes of the extreme heavy rainfall event of January 2009 over Mindanao Island, Philippines Open
This study investigates the synoptic conditions that led to the heavy rainfall/flood (HRF) event in Mindanao Island, Philippines (122 −127°E; 5 −10°N), on January 2009 (JAN2009 HRF) that are less emphasized in previous works. Extensive flo…
View article: 3D Reconstruction of Typhoon and Thunderstorm Cloud Top Using Airborne Camera&#160;
3D Reconstruction of Typhoon and Thunderstorm Cloud Top Using Airborne Camera  Open
Typhoons are extreme weather phenomena that inflict damages and casualties around globe. These phenomena are difficult to study because of their chaotic behaviour but the capacity to measure their intensity can help mitigate the hazards th…
Estimation of Excess Deaths during Hot Summers in Japan Open
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…