| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/4464SK5 | |||
| Repository | sid.inpe.br/mtc-m21c/2021/02.10.11.38 (restricted access) | |||
| Last Update | 2021:02.10.11.38.42 (UTC) administrator | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2021/02.10.11.38.42 | |||
| Metadata Last Update | 2022:04.03.22.28.06 (UTC) administrator | |||
| DOI | 10.1016/j.palaeo.2020.109952 | |||
| ISSN | 0031-0182 | |||
| Citation Key | PiacsekBeGuVeLeBeAl:2021:ChSeSu | |||
| Title | Changes in sea surface hydrography and productivity in the western equatorial Atlantic since the last interglacial  | |||
| Year | 2021 | |||
| Month | Jan. | |||
| Access Date | 2024, May 09 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 7781 KiB | |||
| 2. Context | ||||
| Author | 1 Piacsek, Patrícia 2 Behling, Hermann 3 Gu, Fang 4 Venancio, Igor Martins 5 Lessa, Douglas V. O. 6 Belem, André 7 Albuquerque, Ana Luiza S. | |||
| Group | 1 2 3 4 MET-MET-DIPGR-INPE-MCTI-GOV-BR | |||
| Affiliation | 1 Universidade Federal Fluminense (UFF) 2 University of Goettingen 3 University of Goettingen 4 Instituto Nacional de Pesquisas Espaciais (INPE) 5 Universidade Federal Fluminense (UFF) 6 Universidade Federal Fluminense (UFF) 7 Universidade Federal Fluminense (UFF) | |||
| Author e-Mail Address | 1 Piacsekpatricia@gmail.com 2 3 4 igor.venancio@inpe.br | |||
| Journal | Palaeogeography, Palaeoclimatology, Palaeoecology | |||
| Volume | 562 | |||
| Pages | e109952 | |||
| Secondary Mark | A1_INTERDISCIPLINAR A1_GEOGRAFIA A1_ENGENHARIAS_III A1_CIÊNCIAS_AMBIENTAIS A1_BIODIVERSIDADE A2_SAÚDE_COLETIVA A2_GEOCIÊNCIAS A2_CIÊNCIAS_AGRÁRIAS_I B1_QUÍMICA B1_ENGENHARIAS_IV B1_CIÊNCIAS_BIOLÓGICAS_I B2_ASTRONOMIA_/_FÍSICA C_FILOSOFIA/TEOLOGIA:subcomissão_FILOSOFIA | |||
| History (UTC) | 2021-06-02 13:20:47 :: simone -> administrator :: 2021 2022-04-03 22:28:06 :: administrator -> simone :: 2021 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Version Type | publisher | |||
| Keywords | Dinoflagellate Glacial-Interglacial Intertropical Convergence Zone Heinrich Stadials | |||
| Abstract | Scientific projections point to the increase of greenhouse gas levels in the atmosphere will turn the oceans warmer and, consequently, the upper layer of the thermohaline circulation will get thicker, restricting the productivity areas. Oligotrophic conditions will tend to prevail, and expanding the range of proxy data in oligotrophic oceans, across different climate scenarios, has the potential to improve predictions of climate models about how primary productivity will respond. Still, the variability of past primary production in the equatorial Atlantic remains elusive. We used organic-walled dinoflagellate cysts (dinocysts) assemblages to reconstruct changes in the sea surface hydrography and productivity in the western equatorial Atlantic over the last similar to 130 kyr. Four dinocysts assemblages were defined: open ocean, river outflow, neritic and nutricline assemblages. Multiple proxies were used to support the environmental changes evidenced by the observed variations in the dinocyst assemblages, such as the X-ray fluorescence (XRF) Ti/Ca ratio, and planktonic foraminifera abundances. We observed glacial-interglacial as well as the millennial-scale changes in the dinocyst assemblages. A clear glacial-interglacial pattern was marked by more autotrophs dinocysts over the interglacials and the prevalence of heterotrophs dinocysts during the glacial period. We pointed out the interchange of autotrophs assemblages (nutricline and open ocean) over the interglacials intervals, denoting divergences in nutrient availability. During the last glacial period, precipitation events occurred in northeastern Brazil due to southward displacements of the Intertropical Convergence Zone (ITCZ). The increase of precipitation boosted the freshwater input to the adjacent ocean, and the dinocyst assemblages oscillated in response to such freshwater/salinity changes. Over the glacial period, dinocysts with different nutritional requirements (autotrophs and heterotrophs) varied following the ITCZ displacements. Thus, in this study, we showed the influence of ocean-atmospheric processes on the ocean and investigated the productivity in an oligotrophic region over distinct past climatic backgrounds. | |||
| Area | MET | |||
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > MET > Changes in sea... | |||
| Arrangement 2 | Changes in sea... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| Language | en | |||
| Target File | piacsek_changes.pdf | |||
| User Group | simone | |||
| Visibility | shown | |||
| Archiving Policy | denypublisher denyfinaldraft24 | |||
| Read Permission | deny from all and allow from 150.163 | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/3F35TRS 8JMKD3MGPCW/46KUATE | |||
| Dissemination | WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX. | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn label lineage mark mirrorrepository nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||