Artykuł w czasopiśmie
Brak miniatury
Licencja
ClosedAccessDostęp zamknięty
 

Cyclonic activity over northeastern Africa at 8.5–6.7 cal kyr B.P., based on lacustrine records in the Faiyum Oasis, Egypt

Uproszczony widok
cris.lastimport.scopus2024-02-12T20:10:29Z
dc.abstract.en<p>During African Humid Period in the Holocene when the summer Intertropical Convergence Zone migrated to its northernmost position, the Qarun Lake in the Faiyum Oasis in Egypt was fed with regular inflows from the Nile River and rainfall brought by the Mediterranean winter circulation. Finely-laminated lake sediments, dated at 8.5–6.7 cal kyr B.P., were examined in terms of lithology, geochemistry, microfossils (diatom, pollen) and magnetic susceptibility. Based on the inferred geographical derivation of pollen, the environmental affiliation of diatom taxa and geochemistry of lake sediments, wind trajectories were distinguished, related to two main atmospheric circulation phases. During the earlier phase (8.50–7.83 cal kyr B.P.) there were northwestern wind trajectories followed by southern ones and during the later phase (7.83–6.70 cal kyr B.P.), the northern winds were followed by northwestern and southern ones. Northwestern and northern winds brought winter rainfall and caused water turbulence in the lake, and the southern winds were associated with regional aridification. This scenario of atmospheric circulation in northeastern Africa extends significantly our understanding of key modes of climatic variability and wind trajectories in the Early to Middle Holocene (Greenlandian to Northgrippian) transition.</p>
dc.affiliationUniwersytet Warszawski
dc.contributor.authorWelc, Fabian
dc.contributor.authorMilecka, Krystyna
dc.contributor.authorZalat, Abdelfattah
dc.contributor.authorChen, Zhongyuan
dc.contributor.authorMajecka, Aleksandra
dc.contributor.authorNitychoruk, Jerzy
dc.contributor.authorSalem, Alaa
dc.contributor.authorSun, Qianli
dc.contributor.authorSzymanek, Marcin
dc.contributor.authorGałecka, Izabela
dc.contributor.authorTołoczko-Pasek, Anna
dc.contributor.authorMarks, Leszek
dc.date.accessioned2024-01-24T21:15:14Z
dc.date.available2024-01-24T21:15:14Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.volume528
dc.identifier.doi10.1016/J.PALAEO.2019.04.032
dc.identifier.issn0031-0182
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/104073
dc.identifier.weblinkhttp://150.254.65.57/info/article/UAMc1e781bb921c46c5844e25cf3d8dc468/
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofPalaeogeography, Palaeoclimatology, Palaeoecology
dc.relation.pages120-132
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enHolocene
dc.subject.enAtmospheric circulation
dc.subject.enIntertropical Convergence Zone
dc.subject.enPalaeowesterlies
dc.subject.enpollen record
dc.subject.enDiatoms
dc.titleCyclonic activity over northeastern Africa at 8.5–6.7 cal kyr B.P., based on lacustrine records in the Faiyum Oasis, Egypt
dc.typeJournalArticle
dspace.entity.typePublication