Long-term changes in summer temperature anomaly patterns in Japan since the early 20th century

Hirano, Junpei; Mikami, Taisei

doi:10.1002/joc.4241

Cited by 3 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, different phenomena inducing WSDI differently occur in the southern Tohoku to Okinawa‐Amami regions and in the Kanto to Chubu regions since Modes 1 to 3 scores of WSDI are not correlated with each other. Mode 1 is known as cold in the north and hot in the west type due to weak Pacific High with normal extent, and Mode 2 is as whole country type due to weak Pacific High, prolonged Baiu rainy season in July, and strong Okhotsk High (Hirano and Mikami, 2015) for summer. Modes 1 and 3 have contributed to an increasing trend in WSDI and the second one does so obviously after 2010.…”

Section: Resultsmentioning

confidence: 99%

Historical trends in climate indices relevant to surface air temperature and precipitation in Japan for recent 120 years

Nakaegawa

Murazaki

2022

Intl Journal of Climatology

View full text Add to dashboard Cite

Geographical distributions of trends in climate indices with statistical significance in Japan are investigated at each of the 51 observation stations for the recent 120 years. We employed a comprehensive set of the 70 climate indices on an annual timescale to detect climate changes and to facilitate climate information for a variety of sectors, which are developed by expert team on sector-specific indices in the World Meteorological Organization. The rising trends have regional differences such as the annual mean of daily maximum and minimum surface air temperatures in the Kanto-Koushin region. The statistically significant increasing trends in three daily heavy precipitationrelevant climate indices, R95p, R99p, and RX1day, are seen in Hokuriku, Shikoku, the western part of Northern and Southern Kyusyu regions, and isolated stations in the other regions. Rotational empirical orthogonal function analysis of R99p revealed different features of statistically significant modes suggesting the trends are attributed to changes in different atmospheric phenomena as well as those of warm spell duration index. The number of the stations with statistically significant trends varies with an index. Indies relevant to daily minimum surface air temperatures have statistically significant trends at most of the 51 stations. Consecutive dry days are the most sensitive to climate changes for the 120 years among the indices relevant to precipitation in this analysis. The indices relevant to heavy precipitation are not always been most sensitive to climate change detections in Japan. The geographical distributions of the percentage of the number of indices with statistically significant changes to the total number of the stations provide information about stations sensitive to climate changes. The highest sensitivity is seen at Kumamoto. These results directly provide detection of climate changes and show the potentials of which index is sensitive to ongoing climate changes from the viewpoint of geographical distributions.

show abstract

Section: Resultsmentioning

confidence: 99%

Historical trends in climate indices relevant to surface air temperature and precipitation in Japan for recent 120 years

Nakaegawa

Murazaki

2022

Intl Journal of Climatology

View full text Add to dashboard Cite

show abstract

“…Nagata and Mikami () suggested that a strong relationship between the meridional displacement of the western edge of the NPSH and temperature over Japan was observed after 1950. Hirano and Mikami () found that the southwestward shift of the NPSH after 1950 caused a strong regional difference in the summer temperature between northern and southwestern Japan. Similarly, Lo and Hsu () suggested that the summer climate regime shift in temperature over Taiwan and East Asia during the early 1950s was associated with a southwestward expanding subtropical ridge in the western North Pacific.…”

Section: Introductionmentioning

confidence: 99%

Changes in the relationship between summer rainfall over Japan and the North Pacific subtropical high, 1901–2000

Nagata

Mikami

2016

Intl Journal of Climatology

Self Cite

View full text Add to dashboard Cite

Interdecadal changes in the relationship between summer rainfall over Japan and the western edge of the North Pacific subtropical high (NPSH) were investigated for the 1901–2000 period. In this study, indices describing the zonal and meridional displacement of the western edge of the NPSH (NPSHI‐Z and NPSHI‐M, respectively) were used for the analysis. Consistent with the southwestward shift of the NPSH after 1950, the region with a significant correlation between summer rainfall and the NPSHI‐Z has shifted southwestward, from the Pacific side of central Honshu in the pre50 (1901–1950) to around Kyushu in the post50 (1951–2000). Moreover, a significant connection between summer rainfall and the NPSHI‐M was widely observed in the post50, whereas no significant relationship between these phenomena was detected in the pre50. The identified change was likely due to the change in the relationship between the Pacific‐Japan (PJ) pattern and the NPSHI‐M. It is found that there is a change point in 1950 for the PJ pattern and after that the relationship between the NPSHI‐M and PJ pattern has become stronger.

show abstract

Climate Reconstructions for Historical Periods

Mikami

2023

Advances in Global Change Research

View full text Add to dashboard Cite

Long-term changes in summer temperature anomaly patterns in Japan since the early 20th century

Cited by 3 publications

References 43 publications

Historical trends in climate indices relevant to surface air temperature and precipitation in Japan for recent 120 years

Historical trends in climate indices relevant to surface air temperature and precipitation in Japan for recent 120 years

Changes in the relationship between summer rainfall over Japan and the North Pacific subtropical high, 1901–2000

Climate Reconstructions for Historical Periods

Contact Info

Product

Resources

About