Weather noise leading to El Niño diversity in an ocean general circulation model
The frequency of Central Pacific (CP) El Niño occurrences has increased since the late 1990s. In spite of a wealth of studies, however, the physical mechanisms that have caused the change remain unclear. We hypothesize that atmospheric weather noise plays a role in these occurrences. To test this hy...
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| Veröffentlicht in: | Climate dynamics 2019-06, Vol.52 (12), p.7235-7247 |
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| creator | Lee, Jong-Won Yeh, Sang-Wook Jo, Hyun-Su |
| description | The frequency of Central Pacific (CP) El Niño occurrences has increased since the late 1990s. In spite of a wealth of studies, however, the physical mechanisms that have caused the change remain unclear. We hypothesize that atmospheric weather noise plays a role in these occurrences. To test this hypothesis, we conduct four simulations using Modular Ocean Model version 4 (MOM4) forced by atmospheric weather noise. In this study, the atmospheric weather noise is defined as the random noise obtained from the European Centre for Medium-Range Weather Forecasts atmospheric datasets. In the first experiment, MOM4 is forced by atmospheric weather noise before 1999 along with the corresponding climatological mean state. In the second experiment, MOM4 is forced by atmospheric weather noise after 1999 along with the corresponding climatological mean state. The third and fourth experiments are similar to the first two experiments except the time periods of the climatological mean state are switched. The results show that atmospheric weather noise may play a more important role than the climatological mean state in the increase of CP El Niño occurrences. This implies that the El Niño diversity could be caused by the modulation of atmospheric weather noise. Therefore, it is important to explore how the atmospheric weather noise might change in light of global warming. |
| doi_str_mv | 10.1007/s00382-016-3438-3 |
| format | Article |
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In spite of a wealth of studies, however, the physical mechanisms that have caused the change remain unclear. We hypothesize that atmospheric weather noise plays a role in these occurrences. To test this hypothesis, we conduct four simulations using Modular Ocean Model version 4 (MOM4) forced by atmospheric weather noise. In this study, the atmospheric weather noise is defined as the random noise obtained from the European Centre for Medium-Range Weather Forecasts atmospheric datasets. In the first experiment, MOM4 is forced by atmospheric weather noise before 1999 along with the corresponding climatological mean state. In the second experiment, MOM4 is forced by atmospheric weather noise after 1999 along with the corresponding climatological mean state. The third and fourth experiments are similar to the first two experiments except the time periods of the climatological mean state are switched. The results show that atmospheric weather noise may play a more important role than the climatological mean state in the increase of CP El Niño occurrences. This implies that the El Niño diversity could be caused by the modulation of atmospheric weather noise. Therefore, it is important to explore how the atmospheric weather noise might change in light of global warming.</description><identifier>ISSN: 0930-7575</identifier><identifier>EISSN: 1432-0894</identifier><identifier>DOI: 10.1007/s00382-016-3438-3</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Alliances ; Climate change ; Climatological means ; Climatology ; Computer simulation ; Earth and Environmental Science ; Earth Sciences ; El Nino ; El Nino phenomena ; General circulation models ; Geophysics/Geodesy ; Global warming ; Meteorological satellites ; Noise ; Ocean models ; Oceanography ; Oceans ; Random noise ; Weather forecasting</subject><ispartof>Climate dynamics, 2019-06, Vol.52 (12), p.7235-7247</ispartof><rights>Springer-Verlag Berlin Heidelberg 2016</rights><rights>Climate Dynamics is a copyright of Springer, (2016). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c316t-3fe6d227509d63ec1fd9ce411650e6d09af093990fe73dd680e5eb153c7274a93</citedby><cites>FETCH-LOGICAL-c316t-3fe6d227509d63ec1fd9ce411650e6d09af093990fe73dd680e5eb153c7274a93</cites><orcidid>0000-0003-4549-1686</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00382-016-3438-3$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00382-016-3438-3$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Lee, Jong-Won</creatorcontrib><creatorcontrib>Yeh, Sang-Wook</creatorcontrib><creatorcontrib>Jo, Hyun-Su</creatorcontrib><title>Weather noise leading to El Niño diversity in an ocean general circulation model</title><title>Climate dynamics</title><addtitle>Clim Dyn</addtitle><description>The frequency of Central Pacific (CP) El Niño occurrences has increased since the late 1990s. In spite of a wealth of studies, however, the physical mechanisms that have caused the change remain unclear. We hypothesize that atmospheric weather noise plays a role in these occurrences. To test this hypothesis, we conduct four simulations using Modular Ocean Model version 4 (MOM4) forced by atmospheric weather noise. In this study, the atmospheric weather noise is defined as the random noise obtained from the European Centre for Medium-Range Weather Forecasts atmospheric datasets. In the first experiment, MOM4 is forced by atmospheric weather noise before 1999 along with the corresponding climatological mean state. In the second experiment, MOM4 is forced by atmospheric weather noise after 1999 along with the corresponding climatological mean state. The third and fourth experiments are similar to the first two experiments except the time periods of the climatological mean state are switched. The results show that atmospheric weather noise may play a more important role than the climatological mean state in the increase of CP El Niño occurrences. This implies that the El Niño diversity could be caused by the modulation of atmospheric weather noise. Therefore, it is important to explore how the atmospheric weather noise might change in light of global warming.</description><subject>Alliances</subject><subject>Climate change</subject><subject>Climatological means</subject><subject>Climatology</subject><subject>Computer simulation</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>El Nino</subject><subject>El Nino phenomena</subject><subject>General circulation models</subject><subject>Geophysics/Geodesy</subject><subject>Global warming</subject><subject>Meteorological satellites</subject><subject>Noise</subject><subject>Ocean models</subject><subject>Oceanography</subject><subject>Oceans</subject><subject>Random noise</subject><subject>Weather forecasting</subject><issn>0930-7575</issn><issn>1432-0894</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kN1KAzEQhYMoWKsP4F3A69X8bJLNpZT6A0URFC9D3MzWlG1Sk63Qx_IZfDFTVvDKmxmYOefM8CF0TsklJURdZUJ4wypCZcVr3lT8AE1ozcuk0fUhmhDNSaWEEsfoJOcVIbSWik3Q0yvY4R0SDtFnwD1Y58MSDxHPe_zgv78idv4TUvbDDvuAbcCxhVKXECDZHrc-tdveDj4GvI4O-lN01Nk-w9lvn6KXm_nz7K5aPN7ez64XVcupHCregXSMKUG0kxxa2jndQk2pFKRsiLZd-Vlr0oHizsmGgIA3KnirmKqt5lN0MeZuUvzYQh7MKm5TKCcNY0w3QnKxV9FR1aaYc4LObJJf27QzlJg9OTOSM4Wc2ZMzvHjY6MlFG5aQ_pL_N_0AjxRwyA</recordid><startdate>20190601</startdate><enddate>20190601</enddate><creator>Lee, Jong-Won</creator><creator>Yeh, Sang-Wook</creator><creator>Jo, Hyun-Su</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7TN</scope><scope>7UA</scope><scope>7XB</scope><scope>88F</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>M1Q</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><orcidid>https://orcid.org/0000-0003-4549-1686</orcidid></search><sort><creationdate>20190601</creationdate><title>Weather noise leading to El Niño diversity in an ocean general circulation model</title><author>Lee, Jong-Won ; 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In spite of a wealth of studies, however, the physical mechanisms that have caused the change remain unclear. We hypothesize that atmospheric weather noise plays a role in these occurrences. To test this hypothesis, we conduct four simulations using Modular Ocean Model version 4 (MOM4) forced by atmospheric weather noise. In this study, the atmospheric weather noise is defined as the random noise obtained from the European Centre for Medium-Range Weather Forecasts atmospheric datasets. In the first experiment, MOM4 is forced by atmospheric weather noise before 1999 along with the corresponding climatological mean state. In the second experiment, MOM4 is forced by atmospheric weather noise after 1999 along with the corresponding climatological mean state. The third and fourth experiments are similar to the first two experiments except the time periods of the climatological mean state are switched. The results show that atmospheric weather noise may play a more important role than the climatological mean state in the increase of CP El Niño occurrences. This implies that the El Niño diversity could be caused by the modulation of atmospheric weather noise. Therefore, it is important to explore how the atmospheric weather noise might change in light of global warming.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s00382-016-3438-3</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0003-4549-1686</orcidid></addata></record> |
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| subjects | Alliances Climate change Climatological means Climatology Computer simulation Earth and Environmental Science Earth Sciences El Nino El Nino phenomena General circulation models Geophysics/Geodesy Global warming Meteorological satellites Noise Ocean models Oceanography Oceans Random noise Weather forecasting |
| title | Weather noise leading to El Niño diversity in an ocean general circulation model |
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