[vc_empty_space][vc_empty_space]
Last deglaciation-holocene Australian-Indonesian monsoon rainfall changes off southwest Sumba, Indonesia
Ardi R.D.W.a,b, Aswana, Maryunani K.A.a, Yulianto E.c, Putra P.S.a,c, Nugroho S.H.a,c, Istianad
a Geological Engineering Study Program, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Bandung, 40132, Indonesia
b Agrotechnology Study Program, Faculty of Science and Technology, Universitas Nahdlatul Ulama Purwokerto, Purwokerto, 53144, Indonesia
c Research Center for Geotechnology, Indonesian Institute of Sciences, Bandung, 40135, Indonesia
d Mining Engineering Study Program, Faculty of Engineering, Universitas Muhammadiyah Tasikmalaya, Tasikmalaya, 46196, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020 by the authors.Previous studies suggested the multi-millennial scale changes of Australian-Indonesian monsoon (AIM) rainfall, but little is known about their mechanism. Here, AIM rainfall changes since the Last Deglaciation (~18 ka BP) are inferred from geochemical elemental ratios (terrigenous input) and palynological proxies (pollen and spores). Pollen and spores indicate drier Last Deglaciation (before ~11 ka BP) and wetter Holocene climates (after ~11 ka BP). Terrigenous input proxies infer three drier periods (i.e., before ~17, ~15-13.5, and 7-3 ka BP) and three wetter periods (i.e., ~17-15, ~13.5-7, and after ~3 ka BP) which represent the Australian-Indonesian summer monsoon (AISM) rainfall changes. Pollen and spores were highly responsive to temperature changes and showed less sensitivity to rainfall changes due to their wider source area, indicating their incompatibility as rainfall proxy. During the Last Deglaciation, AISM rainfall responded to high latitude climatic events related to the latitudinal shifts of the austral summer ITCZ. Sea level rise, solar activity, and orbitally-induced insolation were most likely the primary driver of AISM rainfall changes during the Holocene, but the driving mechanisms behind the latitudinal shifts of the austral summer ITCZ during this period are not yet understood.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Austral summers,Climatic events,Driving mechanism,Holocene climate,Last deglaciation,Monsoon rainfall,Temperature changes,Terrigenous inputs[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Australian-Indonesian monsoon,Elemental ratio,Lesser sunda islands,Marine palynology,Paleoclimate[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][{‘$’: ‘This research was funded by the Indonesian Endowment Fund for Education (LPDP) (grant number 202001110215954) and the Research Center for Oceanography of LIPI. Furthermore, The APC was funded by the Indonesian Endowment Fund for Education (LPDP). We thank the Indonesian Endowment Fund for Education (LPDP) for the financial aid. We thank the Research Center for Oceanography of LIPI, especially Udhi Hermawan, as the chief scientist of E-WIN 2016 for the permission of data usage and administrative assistance. We thank Singgih Prasetyo Adi Wibowo and all crews of the Baruna Jaya VIII R.V. for technical supports and data collecting. The Research Center for Geotechnology of LIPI and the Geological Engineering Study Program of Institut Teknologi Bandung (ITB) are thanked for the laboratory facilities.’}, {‘$’: ‘Acknowledgments: We thank the Indonesian Endowment Fund for Education (LPDP) for the financial aid. We thank the Research Center for Oceanography of LIPI, especially Udhi Hermawan, as the chief scientist of E-WIN 2016 for the permission of data usage and administrative assistance. We thank Singgih Prasetyo Adi Wibowo and all crews of the Baruna Jaya VIII R.V. for technical supports and data collecting. The Research Center for Geotechnology of LIPI and the Geological Engineering Study Program of Institut Teknologi Bandung (ITB) are thanked for the laboratory facilities.’}, {‘$’: ‘Funding: This research was funded by the Indonesian Endowment Fund for Education (LPDP) (grant number 202001110215954) and the Research Center for Oceanography of LIPI. Furthermore, The APC was funded by the Indonesian Endowment Fund for Education (LPDP).’}][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.3390/atmos11090932[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]