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Late Quateranry dinoflagellate cysts of ODP Site 202-1233

Authors
Publisher
PANGAEA
Publication Date
Identifiers
DOI: 10.1594/pangaea.815994
Keywords
  • = Type 8
  • 18583 Spores/Tablet
  • 202-1233A
  • Achomo
  • Achomosphaera
  • Achomosphaera Spp
  • Acr
  • Acritarcha
  • Acritarcha Spp
  • Age
  • Maximum/Old
  • Age
  • Minimum/Young
  • Age Max
  • Age Min
  • Ascospores
  • B
  • Tepikiense
  • Bitectatodinium Tepikiense
  • Brigantedinium Spp
  • Cf
  • Achomosphaera/Spiniferites
  • Cf
  • L
  • Invisitatum
  • Chlamydospores
  • Crustacea
  • Planktonic
  • Eggs
  • Cyclopsiella Spp
  • Cymathiosphaera Spp
  • Cyst
  • Cyst E
  • Cysts
  • Cysts
  • D
  • Chathamensis
  • D
  • Symmetrica
  • Dalella Chathamensis
  • Depth
  • Composite Bottom
  • Depth
  • Composite Top
  • Depth C Bot
  • Depth C Top
  • Description
  • Description 2
  • Description 2 (Continued)
  • Dinocyst A
  • Dinoflagellate Cyst
  • Dinoflagellate Cyst
  • Reworked
  • Dinoflagellate Cyst Indeterminata
  • Dinoflagellate Cyst Per Unit Mass
  • Dinoflagellate Zone
  • Dinofl Cyst
  • Dinofl Cyst Rew
  • Dinofl Indet
  • Dinofl Zone
  • Diplopelta Symmetrica
  • Drilling
  • Dry M
  • Dry Mass
  • E
  • Aculeatum
  • E
  • Granulatum
  • E
  • Transparantum
  • E
  • Zonneveldiae
  • Echinidinium Aculeatum
  • Echinidinium Granulatum
  • Echinidinium Sp
  • Echinidinium Spp
  • Echinidinium Transparantum
  • Echinidinium Zonneveldiae
  • Foraminifera
  • Linings
  • Foram Lin
  • Fragments
  • Fragments
  • Type A
  • Fruiting Bodies
  • Given In #/Cm**2/G
  • H
  • Problematica
  • Halodinium Spp
  • Hexasterias Problematica
  • I
  • Aculeatum
  • I
  • Japonicum
  • I
  • Pallidum
  • I
  • Paradoxum
  • I
  • Patulum
  • I
  • Plicatum
  • I
  • Sphaericum
  • I
  • Strialatum
  • Impagidinium Aculeatum
  • Impagidinium Japonicum
  • Impagidinium Pallidum
  • Impagidinium Paradoxum
  • Impagidinium Patulum
  • Impagidinium Plicatum
  • Impagidinium Sp
  • Impagidinium Sphaericum
  • Impagidinium Spp
  • Impagidinium Strialatum
  • Including E
  • Delicatum
  • Including N
  • Rigida
  • Indeterminata
  • Invertebrate Mand
  • Invertebrate Mandibels
  • Joides Resolution
  • L
  • Invisitatum
  • Leg202
  • Leipokatium Invisitatum
  • Lejeunecysta Spp
  • Lyc
  • Counted
  • Lyc
  • Tabn
  • Lycopodium Spores Counted
  • Lycopodium Tablets
  • Microforaminiferal
  • Monolete
  • N
  • Labyrinthus
  • Nematosphaeropsis Labyrinthus
  • Nematosphaeropsis Sp
  • No
  • Number
  • O
  • Centrocarpum S Wall And Dale
  • O
  • Israelianum
  • Ocean Drilling Program
  • Odp
  • Operculodinium Centrocarpum Sensu Wall And Dale (1966)
  • Operculodinium Israelianum
  • Operculodinium Spp
  • P
  • Americanum
  • P
  • Dalei
  • P
  • Kofoidii
  • P
  • Reticulata
  • P
  • Schwartzii
  • Pdi
  • Pediastrum
  • Pentaspharsodinium Dalei
  • Plankt Crustacea Eggs
  • Plant Rem
  • Plant Remains
  • Pollen
  • Bisaccate
  • Pollen+Spores
  • Pollen And Spores
  • Pollen Bisaccate
  • Polykrikos Kofoidii
  • Polykrikos Schwartzii
  • Polykrikos Spp
  • Protoperidinioid Cyst
  • Protoperidinium Americanum
  • Pterospermella Spp
  • Pyxidinopsis Reticulata
  • Q
  • Concreta
  • Questionable
  • Questionable
  • Sp
  • 1
  • Quinquecuspis Concreta
  • S
  • L
  • S
  • Mirabilis
  • S
  • Quanta
  • S
  • Ramosus
  • Scolec
  • Scolecodonta
  • Selenopemphix Quanta
  • Selenopemphix Sp
  • Short Processes
  • Small Spiny
  • South Pacific Ocean
  • Sp
  • 1
  • Sp
  • 2
  • Sp
  • 3
  • Sp
  • 4
  • Sp
  • 6
  • Spiniferites Mirabilis
  • Spiniferites Ramosus
  • Spiniferites Sp
  • Spiniferites Spp
  • Spiny Brown Cysts [#]
  • Spiny Brown Cysts Type 1
  • Spo
  • Spores
  • Spores
  • Monolete
  • Spores
  • Trilete
  • T
  • Applanatum
  • Tasmanites
  • Tintinnida Remains
  • Tintinnid Rem
  • Total
  • Trilete
  • Trinovantedinium Applanatum
  • Trinovantedinium Sp
  • Type 11B
  • Type 12
  • Type 13
  • Type 14
  • Type 14B
  • Type 5
  • Type 9 (Wall Et Al
  • 1977 -> Form A?)
  • V
  • Calvum
  • V
  • Spinosum
  • Votadinium Calvum
  • Votadinium Spinosum
  • Zone/Subzone

Abstract

The late Quaternary organic-walled dinoflagellate cyst record of Site 1233 (41°S, offshore Chile) was studied with a ?200 year resolution spanning the last 25,000 years. The study provides the first continuous record of sub-recent and recent dinoflagellate cysts in the Southeast (SE) Pacific. Major changes in the composition of the cyst association, cyst concentration and morphology of Operculodinium centrocarpum reflect changes in sea surface temperature (SST), sea surface salinity (SSS), palaeoproductivity and upwelling intensity. These changes can be associated with latitudinal shifts of the circumpolar frontal systems. The high cyst concentration, high Brigantedinium spp. abundances, low species diversity and the occurrence of certain cold water species are supportive for a 7-10° equatorward shift of the Antarctic Circumpolar Current (ACC) during the coldest phase of the Last Glacial Maximum (LGM) between 25 and 21.1 cal ka BP. Deglacial warming initiated at ~18.6 cal ka BP. Termination I (18.6-11.1 cal ka BP) is interrupted by an unstable period of extreme seasonality, rather than a cooling event, between 14.4 and 13.2 cal ka BP, synchronous with the Antarctic Cold Reversal (ACR). The Holocene Maximum is observed between 11.6 and 9.8 cal ka BP and is typified by the most southward position of the northern margin of the ACC. A cooling phase occurred during the early Holocene (until ~7 cal ka BP) and during the last ~0.8 ka. Our data indicates that the SE Pacific (41°S) climate has been influenced over the whole record by changes in the Southern Hemisphere (SH) high-latitudes, while during the mid to late Holocene, also a tropical forcing mechanism was involved, including the El Niño Southern Oscillation and the variable Hadley cell intensity. Furthermore, this study showed a relationship between the variable morphology of the spines/processes of O. centrocarpum and the combined variation of sea surface salinity and temperature (SSS/SST-ratio).

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