title: Features of the formation of the Central and East Pacific La Niña types
metadata.name: dc.contributor.author
metadata.value: Marchukova, Olesia V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Voskresenskaya, Elena N.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2022-10-03T14:01:56Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2022-10-03T14:01:56Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2022-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: 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)
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2022.205
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/38062
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: 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.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: 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”.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Earth Sciences;Volume 67; Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: La Niña types
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: chlorophyll concentration
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: sea surface temperature anomaly
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: thermocline
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Pacific Ocean
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: trade winds
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: surface currents
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Features of the formation of the Central and East Pacific La Niña types
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 05.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/38062/1/05.pdf
resources.format: Adobe PDF
resources.size: 6,67 MB