Results of Heinrich event 1 simulation from the University of Victoria Earth System-Climate Model (UVic ESCM) and the Community Climate System Model (CCSM3)

We investigated changes in tropical climate and vegetation cover associated with abrupt climate change during Heinrich Event 1 (HE1, ca. 17.5 ka BP) using two different global climate models: the University of Victoria Earth System-Climate Model (UVic ESCM) and the Community Climate System Model version 3 (CCSM3). Tropical South American and African pollen records suggest that the cooling of the North Atlantic Ocean during HE1 influenced the tropics through a southward shift of the rain belt. In this study, we simulated the HE1 by applying a freshwater perturbation to the North Atlantic Ocean. The resulting slowdown of the Atlantic Meridional Overturning Circulation was followed by a temperature seesaw between the Northern and Southern Hemispheres, as well as a southward shift of the tropical rain belt. The shift and the response pattern of the tropical vegetation around the Atlantic Ocean were more pronounced in the CCSM3 than in the UVic ESCM simulation. For tropical South America, opposite changes in tree and grass cover were modeled around 10° S in the CCSM3 but not in the UVic ESCM. In tropical Africa, the grass cover increased and the tree cover decreased around 15° N in the UVic ESCM and around 10° N in the CCSM3. In the CCSM3 model, the tree and grass cover in tropical Southeast Asia responded to the abrupt climate change during the HE1, which could not be found in the UVic ESCM. The biome distributions derived from both models corroborate findings from pollen records in southwestern and equatorial western Africa as well as northeastern Brazil.

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Handiani, Dian Noor, Paul, André, Prange, Matthias, Merkel, Ute, Dupont, Lydie M, Zhang, Xiao (2013). Dataset: Results of Heinrich event 1 simulation from the University of Victoria Earth System-Climate Model (UVic ESCM) and the Community Climate System Model (CCSM3). https://doi.org/10.1594/PANGAEA.822369

DOI retrieved: 2013

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.822369
Author Handiani, Dian Noor
Given Name Dian Noor
Family Name Handiani
More Authors
Paul, André
Prange, Matthias
Merkel, Ute
Dupont, Lydie M
Zhang, Xiao
Source Creation 2013
Publication Year 2013
Resource Type text/tab-separated-values - filename: Handiani_2013_link-to-netcdf-files
Subject Areas
Name: Atmosphere

Name: Lithosphere

Related Identifiers
Title: Tropical vegetation response to Heinrich Event 1 as simulated with the UVic ESCM and CCSM3
Identifier: https://doi.org/10.5194/cp-9-1683-2013
Type: DOI
Relation: IsSupplementTo
Year: 2013
Source: Climate of the Past
Authors: Handiani Dian Noor , Paul André , Prange Matthias , Merkel Ute , Dupont Lydie M , Zhang Xiao .

Title: Description of: Filenames, parameters, unit, and filetype
Identifier: hdl:10013/epic.42673.d001
Type: DOI
Relation: References