Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning Autoencoder
Abstract The frequency of large‐scale anomalous precipitation events associated with heavy precipitation has been increasing in Japan. However, it is unclear if the increase is due to anthropogenic warming or internal variability. Also, it is challenging to develop an objective methodology to identi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-04-01
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| Series: | Earth's Future |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2021EF002481 |
| _version_ | 1811220635389526016 |
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| author | H. Murakami T. L. Delworth W. F. Cooke S. B. Kapnick P.‐C. Hsu |
| author_facet | H. Murakami T. L. Delworth W. F. Cooke S. B. Kapnick P.‐C. Hsu |
| author_sort | H. Murakami |
| collection | DOAJ |
| description | Abstract The frequency of large‐scale anomalous precipitation events associated with heavy precipitation has been increasing in Japan. However, it is unclear if the increase is due to anthropogenic warming or internal variability. Also, it is challenging to develop an objective methodology to identify anomalous events because of the large variety of anomalous precipitation cases. In this study, we applied a deep learning technique to objectively detect anomalous precipitation events in Japan for both observations and simulations using high‐resolution climate models. The results show that the observed increases in anomalous heavy precipitation events in Western Japan during 1977–2015 were not made only by internal variability but the increases in anthropogenic forcing played an important role. Such events will continue to increase in frequency this century. The increases are attributable to the increasing frequency of tropical cyclones and enhanced frontal rainbands near Japan. These results highlight the mitigation challenge posed by the increasing occurrence of unprecedented precipitation events in the future. |
| first_indexed | 2024-04-12T07:45:03Z |
| format | Article |
| id | doaj.art-ef8b77710b294ba49a3e2f6676090f0d |
| institution | Directory Open Access Journal |
| issn | 2328-4277 |
| language | English |
| last_indexed | 2024-04-12T07:45:03Z |
| publishDate | 2022-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Earth's Future |
| spelling | doaj.art-ef8b77710b294ba49a3e2f6676090f0d2022-12-22T03:41:43ZengWileyEarth's Future2328-42772022-04-01104n/an/a10.1029/2021EF002481Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning AutoencoderH. Murakami0T. L. Delworth1W. F. Cooke2S. B. Kapnick3P.‐C. Hsu4Cooperative Programs for the Advancement of Earth System Science University Corporation for Atmospheric Research Boulder CO USAGeophysical Fluid Dynamics Laboratory National Oceanic and Atmospheric Administration Princeton NJ USAGeophysical Fluid Dynamics Laboratory National Oceanic and Atmospheric Administration Princeton NJ USAGeophysical Fluid Dynamics Laboratory National Oceanic and Atmospheric Administration Princeton NJ USAKey Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science and Technology Nanjing ChinaAbstract The frequency of large‐scale anomalous precipitation events associated with heavy precipitation has been increasing in Japan. However, it is unclear if the increase is due to anthropogenic warming or internal variability. Also, it is challenging to develop an objective methodology to identify anomalous events because of the large variety of anomalous precipitation cases. In this study, we applied a deep learning technique to objectively detect anomalous precipitation events in Japan for both observations and simulations using high‐resolution climate models. The results show that the observed increases in anomalous heavy precipitation events in Western Japan during 1977–2015 were not made only by internal variability but the increases in anthropogenic forcing played an important role. Such events will continue to increase in frequency this century. The increases are attributable to the increasing frequency of tropical cyclones and enhanced frontal rainbands near Japan. These results highlight the mitigation challenge posed by the increasing occurrence of unprecedented precipitation events in the future.https://doi.org/10.1029/2021EF002481deep learningautoencoderextreme eventtropical cycloneJapanBaiu |
| spellingShingle | H. Murakami T. L. Delworth W. F. Cooke S. B. Kapnick P.‐C. Hsu Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning Autoencoder Earth's Future deep learning autoencoder extreme event tropical cyclone Japan Baiu |
| title | Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning Autoencoder |
| title_full | Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning Autoencoder |
| title_fullStr | Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning Autoencoder |
| title_full_unstemmed | Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning Autoencoder |
| title_short | Increasing Frequency of Anomalous Precipitation Events in Japan Detected by a Deep Learning Autoencoder |
| title_sort | increasing frequency of anomalous precipitation events in japan detected by a deep learning autoencoder |
| topic | deep learning autoencoder extreme event tropical cyclone Japan Baiu |
| url | https://doi.org/10.1029/2021EF002481 |
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