Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на этот ресурс:
http://hdl.handle.net/11701/38062
Полная запись метаданных
Поле DC | Значение | Язык |
---|---|---|
dc.contributor.author | Marchukova, Olesia V. | - |
dc.contributor.author | Voskresenskaya, Elena N. | - |
dc.date.accessioned | 2022-10-03T14:01:56Z | - |
dc.date.available | 2022-10-03T14:01:56Z | - |
dc.date.issued | 2022-06 | - |
dc.identifier.citation | Marchukova, O. V., Voskresenskaya, E. N. (2022). Features of the formation of the Central and East Pacific La Niña types. Vestnik of Saint Petersburg University. Earth Sciences, 67 (2), 299–317. https://doi.org/10.21638/spbu07.2022.205 (In Russian) | en_GB |
dc.identifier.other | https://doi.org/10.21638/spbu07.2022.205 | - |
dc.identifier.uri | http://hdl.handle.net/11701/38062 | - |
dc.description.abstract | This paper the analyzes dataset of global ocean chlorophyll A (Chl a) concentration from the GlobColour project over the equatorial Pacific during the La Niña events from 1998 to 2018. GlobColour includes satellite sensors such as SeaWiFS, MODIS, MERIS and others. The study of changes in chlorophyll A concentration is carried out with an analysis of sea temperature and current distributions on the surface and over the ocean depth taken from the NCEP GODAS reanalysis from 1981 to 2018. Additionally the trade wind indices from 1979 to 2018 are used. The purpose of the work is to study the mechanisms of formation of two La Niña types, leading to the occurrence of different climatic anomalies in different regions of our planet. It is found that at the initial stage of the Central Pacific La Niña type origin the ocean chlorophyll A concentration over the center equatorial Pacific increases in six to eight times (from 0.1 mg/ m3 to 0.8 mg/m3) and the thermocline depth in this area decreases to 50 m indicating the intensification of the central equatorial upwelling. During the East Pacific La Nina type the central equatorial upwelling is not formed and negative sea surface temperature anomalies are formed by increasing of the Peruvian upwelling supported intensification trade winds on the East Pacific equatorial sector. All obtained results are confirmed by a 95 % statistically significant by Student’s test. Thus, the work is demonstrated significant differences in the features of the two La Niña types formation at their initial stage of origin. | en_GB |
dc.description.sponsorship | The study was carried out within the framework of the state assignment on the topic No. 0012-2021- 0007 (121122300072-3) “Fundamental and applied research on the patterns and mechanisms of formation of regional changes in the natural environment and climate under the influence of global processes in the ocean-atmosphere system and anthropogenic impact”. | en_GB |
dc.language.iso | ru | en_GB |
dc.publisher | St Petersburg State University | en_GB |
dc.relation.ispartofseries | Vestnik of St Petersburg University. Earth Sciences;Volume 67; Issue 2 | - |
dc.subject | La Niña types | en_GB |
dc.subject | chlorophyll concentration | en_GB |
dc.subject | sea surface temperature anomaly | en_GB |
dc.subject | thermocline | en_GB |
dc.subject | Pacific Ocean | en_GB |
dc.subject | trade winds | en_GB |
dc.subject | surface currents | en_GB |
dc.title | Features of the formation of the Central and East Pacific La Niña types | en_GB |
dc.type | Article | en_GB |
Располагается в коллекциях: | Issue 2 |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
---|---|---|---|---|
05.pdf | 6,67 MB | Adobe PDF | Просмотреть/Открыть |
Все ресурсы в архиве электронных ресурсов защищены авторским правом, все права сохранены.