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Hooghiemstra, Henry; Dupont, Lydie M (1988): (Fig. 9) Pollen analysis of sediment core GIK16017-2. PANGAEA, https://doi.org/10.1594/PANGAEA.55040, Supplement to: Hooghiemstra, Henry (1988): Changes of major wind belts and vegetation zones in NW Africa 20,000-5000 yr B.P., as deduced from a marine pollen record near Cap Blanc. Review of Palaeobotany and Palynology, 55(1-3), 101-140, https://doi.org/10.1016/0034-6667(88)90056-5

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Abstract:
The improved understanding of the pollen signal in the marine sediments offshore of northwest Africa is applied to deep-sea core M 16017-2 at 21°N. Downcore fluctuations in the percentage, concentration and influx diagrams record latitudinal shifts of the main northwest African vegetation zones and characteristics of the trade winds and the African Easterly Jet. Time control is provided by 14C ages and 180 records.
During the period 19,000-14,000 yr B.P. a compressed savanna belt extended between about 12 ° and 14-15°N. The Sahara had maximally expanded northward and southward under hyperarid climatic conditions. The belt with trade winds and dominant African Easterly Jet transport had not shifted latitudinally. The trade winds were strong as compared to the modern situation but around 13,000 yr B.P. the trade winds weakened. After 14,000 yr B.P. the climate became less arid south of the Sahara and a first spike of fluvial runoff is registered around 13,000 yr B.P. Fluvial runoff increased strongly around 11,000 yr B.P. and maximum runoff is recorded from about 9000-7800 yr B.P. Around 12,500 yr B.P. the savanna belt started to shift northward and became richer in woody species: it shifted about 6° of latitude, reached its northernmost position during the period of 9200-7800 yr B.P. and extended between about 16° and 24°N at that time. Tropical forest had reached its maximum expansion and the Guinea zone reached as far north as about 15°N, reflecting very humid climatic conditions south of the Sahara. North of the Sahara the climate also became more humid and Mediterranean vegetation developed rapidly. The Sahara had maximally contracted and the trade winds were weak and comparable with the present day intensity. After about 7800 yr B.P. the southern fringe of the Sahara and accordingly the savanna belt, shifted rapidly southward again.
Coverage:
Latitude: 21.245000 * Longitude: -17.803000
Date/Time Start: 1982-01-22T00:00:00 * Date/Time End: 1982-01-22T00:00:00
Minimum DEPTH, sediment/rock: 0.21 m * Maximum DEPTH, sediment/rock: 3.31 m
Event(s):
GIK16017-2 * Latitude: 21.245000 * Longitude: -17.803000 * Date/Time: 1982-01-22T00:00:00 * Elevation Start: -812.0 m * Elevation End: 0.0 m * Recovery: 4.4 m * Location: Atlantic Ocean * Campaign: M60 (SUBTROPEX 82) * Basis: Meteor (1964) * Method/Device: Gravity corer (Kiel type) (SL)
Comment:
Age model see dataset: doi:10.1594/PANGAEA.59662
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2Depth, top/minDepth topmDupont, Lydie M
3Depth, bottom/maxDepth botmDupont, Lydie M
4VolumeVolmlDupont, Lydie M
5Marker, addedMark add#Dupont, Lydie M
6Marker, foundMark found#Dupont, Lydie M
7Acacia/ParkiaAcacPark#Dupont, Lydie MCounting, palynology
8AlchorneaAlchornea#Dupont, Lydie MCounting, palynology
9AlnusAln#Dupont, Lydie MCounting, palynology
10Ambrosia-typeAmb-T#Dupont, Lydie MCounting, palynology
11Antidesma-typeAntide-T#Dupont, Lydie MCounting, palynology
12Artemisia (Africa)Artemisi#Dupont, Lydie MCounting, palynology
13Compositae LigulifloraeAsteLigu#Dupont, Lydie MCounting, palynology
14Compositae TubulifloraeAsteTubu#Dupont, Lydie MCounting, palynology
15BalanitesBalanite#Dupont, Lydie MCounting, palynology
16Isoberlinia-typeBerlin-T#Dupont, Lydie MCounting, palynology
17BetulaBet#Dupont, Lydie MCounting, palynology
18BlepharisBlephari#Dupont, Lydie MCounting, palynology
19Boscia-typeBoscia-T#Dupont, Lydie MCounting, palynology
20BrassicaceaeBraae#Dupont, Lydie MCounting, palynology
21BrideliaBridelia#Dupont, Lydie MCounting, palynology
22ButyrospermumButyrosp#Dupont, Lydie MCounting, palynology
23CalligonumCag#Dupont, Lydie MCounting, palynology
24CanthiumCanthium#Dupont, Lydie MCounting, palynology
25CapparisCap#Dupont, Lydie MCounting, palynology
26Caryophyllac./Chenopodiac./Amaranthac.CCA#Dupont, Lydie MCounting, palynology
27Cassia-typeCassia-T#Dupont, Lydie MCounting, palynology
28Ceiba pentandraCeiba pen#Dupont, Lydie MCounting, palynology
29Celastraceae/HippocrateaceaeCela/Hipp#Dupont, Lydie MCounting, palynology
30CeltisCel#Dupont, Lydie MCounting, palynology
31Centaurea perrottettii-typeC.jace-T#Dupont, Lydie MCounting, palynology
32CleomeCleome#Dupont, Lydie MCounting, palynology
33Combretaceae/MelastomataceaeComb/Mela#Dupont, Lydie MCounting, palynology
34CommiphoraCommipho#Dupont, Lydie MCounting, palynology
35CorylusCor#Dupont, Lydie MCounting, palynology
36Cyperaceae undifferentiatedCypae.ud#Dupont, Lydie MCounting, palynology
37Elaeis guineensisElaeguin#Dupont, Lydie MCounting, palynology
38Ephedra distachya-typeEph.d-T#Dupont, Lydie MCounting, palynology
39Ephedra fragilis-typeEph.f-T#Dupont, Lydie MCounting, palynology
40Erica (Africa)Erica#Dupont, Lydie MCounting, palynology
41ErodiumEro#Dupont, Lydie MCounting, palynology
42Euphorbia-typeEup-T#Dupont, Lydie MCounting, palynology
43GaertneraGaertner#Dupont, Lydie MCounting, palynology
44GymnocarposGymnocar#Dupont, Lydie MCounting, palynology
45GymnosporiaGymnospo#Dupont, Lydie MCounting, palynology
46GypsophilaGyp#Dupont, Lydie MCounting, palynology
47HelianthemumHel#Dupont, Lydie MCounting, palynology
48HeliotropiumHelio#Dupont, Lydie MCounting, palynology
49Indeterminata/variaIndet#Dupont, Lydie MCounting, palynology
50Indigofera-typeIndigo-T#Dupont, Lydie MCounting, palynology
51Juniperus (Africa)Juniperu#Dupont, Lydie MCounting, palynology
52LanneaLannea#Dupont, Lydie MCounting, palynology
53Macaranga-typeMacara-T#Dupont, Lydie MCounting, palynology
54Maerua-typeMaerua-T#Dupont, Lydie MCounting, palynology
55MeliaceaeMeliaceae#Dupont, Lydie MCounting, palynology
56MitracarpusMitracar#Dupont, Lydie MCounting, palynology
57MyricaMyr#Dupont, Lydie MCounting, palynology
58NyctaginaceaeNyctceae#Dupont, Lydie MCounting, palynology
59OleaOle#Dupont, Lydie MCounting, palynology
60Oleaceae (Africa)Oleaceae#Dupont, Lydie MCounting, palynology
61ParonychiaPry#Dupont, Lydie MCounting, palynology
62PhillyreaPhi#Dupont, Lydie MCounting, palynology
63PhyllanthusPhyllanthus#Dupont, Lydie MCounting, palynology
64PiceaPic#Dupont, Lydie MCounting, palynology
65PinusPin#Dupont, Lydie MCounting, palynology
66PlantagoPla#Dupont, Lydie MCounting, palynology
67Poaceae undifferentiatedPoac.ud#Dupont, Lydie MCounting, palynology
68Polycarpaea-typePcarpaea-T#Dupont, Lydie MCounting, palynology
69PolycarponPon#Dupont, Lydie MCounting, palynology
70Polygonum aviculare-typePol.i-T#Dupont, Lydie MCounting, palynology
71Quercus ilex-typeQue.i-T#Dupont, Lydie MCounting, palynology
72Quercus pubescens-typeQue.p-T#Dupont, Lydie MCounting, palynology
73QuercusQue#Dupont, Lydie MCounting, palynology
74Rhamnaceae undifferentiatedRhamnaceae.ud#Dupont, Lydie MCounting, palynology
75RhizophoraRhiz#Dupont, Lydie MCounting, palynology
76Rhus-typeRhu-T#Dupont, Lydie MCounting, palynology
77Rubiaceae undifferentiatedRubea.ud#Dupont, Lydie MCounting, palynology
78RumexRum#Dupont, Lydie MCounting, palynology
79Salvadora persicaSalvador#Dupont, Lydie MCounting, palynology
80SterculiaceaeSteae#Dupont, Lydie MCounting, palynology
81Tamarix (Africa)Tam#Dupont, Lydie MCounting, palynology
82ThymelaeaceaeThyae#Dupont, Lydie MCounting, palynology
83TiliaTil#Dupont, Lydie MCounting, palynology
84TribulusTus#Dupont, Lydie MCounting, palynology
85TrichodesmaTrichode#Dupont, Lydie MCounting, palynology
86Typha angustifolia-typeTyp.a-T#Dupont, Lydie MCounting, palynology
87Utricularia (Africa)Utricula#Dupont, Lydie MCounting, palynology
88Vitaceae (Africa)Vitaceae#Dupont, Lydie MCounting, palynology
89XyridaceaeXyriceae#Dupont, Lydie MCounting, palynology
90ZygophyllumZyg#Dupont, Lydie MCounting, palynology
91IsoetesIso#Dupont, Lydie MCounting, palynology
92OphioglossumOph#Dupont, Lydie MCounting, palynology
93SphagnumSph#Dupont, Lydie MCounting, palynology
94Fern spores indeterminataFern spores indet#Dupont, Lydie MCounting, palynology
95Fern sporesFern spores#Dupont, Lydie MCounting, palynology
96Pollen totalPollen tot#Dupont, Lydie MCounting, palynology
Size:
3135 data points

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