Grimmer, Friederike; Dupont, Lydie M (2020): Pollen analysis of ODP Hole 202-1239A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.921208
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Vegetation and climate change in western equatorial South America were studied using palynological analysis. We studied 88 marine sediment samples from ODP Site 1239 dated between 3.9 and 2.7 Ma. The presented pollen record represents the regional vegetation from the coastal lowlands to the high montane Páramo in the western Andean Cordillera. A trend towards more open vegetation is observed. The climate changes towards cooler conditions, which is manifested by a lowering of the forest line from 3.3 Ma on. An increase of Amaranthaceae pollen after 3.1 Ma suggests drier conditions along the coast. The isochronous occurrence of environmental changes in the presented record, that is, cooling and coastal drying, with the first major pulse of ice‐rafted debris and cooling temperatures in the Northern Hemisphere suggests that these changes might have been a precursor of the intensification of the Northern Hemisphere glaciation.
Related to:
Grimmer, Friederike; Dupont, Lydie M; Jung, Gerlinde; Wefer, Gerold (2020): Piacenzian Environmental Change and the Onset of Cool and Dry Conditions in Tropical South America. Paleoceanography and Paleoclimatology, 35(11), https://doi.org/10.1029/2020PA004060
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -0.672000 * Longitude: -82.080830
Date/Time Start: 2002-05-10T19:45:00 * Date/Time End: 2002-05-13T09:10:00
Minimum DEPTH, sediment/rock: 138.75 m * Maximum DEPTH, sediment/rock: 277.90 m
Event(s):
202-1239A * Latitude: -0.672000 * Longitude: -82.080830 * Date/Time Start: 2002-05-10T19:45:00 * Date/Time End: 2002-05-13T09:10:00 * Elevation: -1414.7 m * Penetration: 515.4 m * Recovery: 515.1 m * Location: South Pacific Ocean * Campaign: Leg202 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 55 cores; 515.4 m cored; 0 m drilled; 99.9 % recovery
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
4400 data points
Download Data
View dataset as HTML (shows only first 2000 rows)