{"http:\/\/lib.itenas.ac.id\/kti\/?p=5463":{"http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#type":[{"type":"uri","value":"http:\/\/rdfs.org\/sioc\/ns#Post"},{"type":"uri","value":"http:\/\/rdfs.org\/sioc\/types#BlogPost"}],"http:\/\/purl.org\/dc\/elements\/1.1\/title":[{"type":"literal","value":"Tropical climate and vegetation changes during Heinrich Event 1: a model-data comparison"}],"http:\/\/purl.org\/dc\/terms\/identifier":[{"type":"literal","value":"5463","datatype":"http:\/\/www.w3.org\/2001\/XMLSchema#integer"}],"http:\/\/purl.org\/dc\/elements\/1.1\/modified":[{"type":"literal","value":"2018-03-15","datatype":"http:\/\/www.w3.org\/2001\/XMLSchema#date"}],"http:\/\/purl.org\/dc\/elements\/1.1\/created":[{"type":"literal","value":"2018-03-15","datatype":"http:\/\/www.w3.org\/2001\/XMLSchema#date"}],"http:\/\/rdfs.org\/sioc\/ns#link":[{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/?p=5463"}],"http:\/\/rdfs.org\/sioc\/ns#has_creator":[{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/?author=6#account"}],"http:\/\/rdfs.org\/sioc\/ns#has_container":[{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/#posts"}],"http:\/\/purl.org\/dc\/elements\/1.1\/abstract":[{"type":"literal","value":""}],"http:\/\/purl.org\/rss\/1.0\/modules\/content\/encoded":[{"type":"literal","value":"<![CDATA[<span class=\"pb_abstract\">Abrupt climate changes from 18 to 15 thousand years before present (kyr BP) associated with Heinrich Event 1 (HE1) had a strong impact on vegetation patterns not only at high latitudes of the Northern Hemisphere, but also in the tropical regions around the Atlantic Ocean. To gain a better understanding of the linkage between high and low latitudes, we used the University of Victoria (UVic) Earth System-Climate Model (ESCM) with dynamical vegetation and land surface components to simulate four scenarios of climate-vegetation interaction: the pre-industrial era, the Last Glacial Maximum (LGM), and a Heinrich-like event with two different climate backgrounds (interglacial and glacial). We calculated mega-biomes from the plant-functional types (PFTs) generated by the model to allow for a direct comparison between model results and palynological vegetation reconstructions.<\/span>\r\n\r\nOur calculated mega-biomes for the pre-industrial period and the LGM corresponded well with biome reconstructions of the modern and LGM time slices, respectively, except that our pre-industrial simulation predicted the dominance of grassland in southern Europe and our LGM simulation resulted in more forest cover in tropical and sub-tropical South America.\r\n\r\nThe HE1-like simulation with a glacial climate background produced sea-surface temperature patterns and enhanced inter-hemispheric thermal gradients in accordance with the \"bipolar seesaw\" hypothesis. We found that the cooling of the Northern Hemisphere caused a southward shift of those PFTs that are indicative of an increased desertification and a retreat of broadleaf forests in West Africa and northern South America. The mega-biomes from our HE1 simulation agreed well with paleovegetation data from tropical Africa and northern South America. Thus, according to our model-data comparison, the reconstructed vegetation changes for the tropical regions around the Atlantic Ocean were physically consistent with the remote effects of a Heinrich event under a glacial climate background.\r\n\r\n<strong>Dibuat Oleh :\u00a0\u00a0<\/strong><span class=\"pb_authors\">D. Handiani, A. Paul, and L. Dupont<\/span>\r\n\r\n<strong>Alamat e-mail: <\/strong>dhandiani@marum.de\r\n\r\n<strong>Kata Kunci:-<\/strong>\r\n\r\n<strong>Keterangan :<\/strong> Karya Tulis Ilmiah ini dimuat pada Climate of The Past : An interactive open-access journal of the European Geoscience Union, volume 8 issue 1,\u00a0 37-57, 2012\r\n\r\n<a href=\"https:\/\/www.clim-past.net\/8\/37\/2012\/\">Tropical climate and vegetation changes during Heinrich Event 1: a model-data comparison<\/a>]]>","datatype":"http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#XMLLiteral"}],"http:\/\/rdfs.org\/sioc\/ns#content":[{"type":"literal","value":"Abrupt climate changes from 18 to 15 thousand years before present (kyr BP) associated with Heinrich Event 1 (HE1) had a strong impact on vegetation patterns not only at high latitudes of the Northern Hemisphere, but also in the tropical regions around the Atlantic Ocean. To gain a better understanding of the linkage between high and low latitudes, we used the University of Victoria (UVic) Earth System-Climate Model (ESCM) with dynamical vegetation and land surface components to simulate four scenarios of climate-vegetation interaction: the pre-industrial era, the Last Glacial Maximum (LGM), and a Heinrich-like event with two different climate backgrounds (interglacial and glacial). We calculated mega-biomes from the plant-functional types (PFTs) generated by the model to allow for a direct comparison between model results and palynological vegetation reconstructions.\r\n\r\nOur calculated mega-biomes for the pre-industrial period and the LGM corresponded well with biome reconstructions of the modern and LGM time slices, respectively, except that our pre-industrial simulation predicted the dominance of grassland in southern Europe and our LGM simulation resulted in more forest cover in tropical and sub-tropical South America.\r\n\r\nThe HE1-like simulation with a glacial climate background produced sea-surface temperature patterns and enhanced inter-hemispheric thermal gradients in accordance with the \"bipolar seesaw\" hypothesis. We found that the cooling of the Northern Hemisphere caused a southward shift of those PFTs that are indicative of an increased desertification and a retreat of broadleaf forests in West Africa and northern South America. The mega-biomes from our HE1 simulation agreed well with paleovegetation data from tropical Africa and northern South America. Thus, according to our model-data comparison, the reconstructed vegetation changes for the tropical regions around the Atlantic Ocean were physically consistent with the remote effects of a Heinrich event under a glacial climate background.\r\n\r\nDibuat Oleh :\u00a0\u00a0D. Handiani, A. Paul, and L. Dupont\r\n\r\nAlamat e-mail: dhandiani@marum.de\r\n\r\nKata Kunci:-\r\n\r\nKeterangan : Karya Tulis Ilmiah ini dimuat pada Climate of The Past : An interactive open-access journal of the European Geoscience Union, volume 8 issue 1,\u00a0 37-57, 2012\r\n\r\nTropical climate and vegetation changes during Heinrich Event 1: a model-data comparison"}],"http:\/\/rdfs.org\/sioc\/ns#topic":[{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/?cat=118"},{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/?cat=147"}]},"http:\/\/lib.itenas.ac.id\/kti\/?author=6#account":{"http:\/\/www.w3.org\/2000\/01\/rdf-schema#seeAlso":[{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/?author=6&feed=lhrdf&format=json"}]},"http:\/\/lib.itenas.ac.id\/kti\/?cat=118":{"http:\/\/www.w3.org\/2000\/01\/rdf-schema#seeAlso":[{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/?cat=118&feed=lhrdf&format=json"}]},"http:\/\/lib.itenas.ac.id\/kti\/?cat=147":{"http:\/\/www.w3.org\/2000\/01\/rdf-schema#seeAlso":[{"type":"uri","value":"http:\/\/lib.itenas.ac.id\/kti\/?cat=147&feed=lhrdf&format=json"}]}}