Interglacial variations of the East Asian summer monsoon
Hong Kong – Hong Kong (PRC)
17.05.2012 – 07.06.2012
Changes in the East Asian summer monsoon are driven by natural factors, however, in more recent times to an increasing degree also by anthropogenic factors. The relative weighting of these controlling factors needs to be known, in order to prognosticate the variability of precipitation in Central Asia, which is of enormous importance for the development of the regional national economies. During this expedition we sampled highly resolved marine climate archives using the Bremen Sea Floor Drill Rig (MeBo) in the northern South China Sea. Novel proxy approaches are applied to these archives combined with climate modeling that allow to reconstruct the natural variability of the East Asian summer monsoon during the Holocene and last 5 interglacials (MIS 13, 11, 9, 7, 5). We are investigating changes in the vegetation and the hydrological cycle in the catchment area of the Pearl River during these climate periods. A model-based comparison of the natural development during the previous interglacials with the already anthropogenic affected Holocene development aims at assessing the relative weighting of natural and anthropogenic forcings. Thus, INVERS will broaden the knowledge base on climate change in Central Asia and will improve scenarios outlining the future dynamic of the monsoon system.
This expedition is directly connected with the BMBF research projects "Natural versus anthropogenic controls of past monsoon variability in Central Asia recorded in marine archives (CARIMA)” and "Central Asian Holocene Climate (CAHOL)" as parts of "Central Asia: Monsoon Dynamics and Geo-Ecosystems (CAME)".
- Huang E., Chen Y., Schefuß E., Mohtadi M., Steinke S., Liu J., Martínez-Méndez G., Tian J., accepted. Wetland expansion on the continental shelf of the northern South China Sea during deglacial sea level rise. Quaternary Science Reviews 231, doi:10.1016/j.quascirev.2020.106202.
- Contreras-Rosales A., Steinke S., Jennerjahn T.C., Mohtadi M., Schefuß E., 2019. Holocene changes in biome size and tropical cyclone activity around the Northern South China Sea. Quaternary Science Reviews 215, 45-63.
- Cheng Z., Weng C., Steinke S., Mohtadi M., 2018. Anthropogenic modification of vegetated landscapes in southern China from 6,000 years ago. Nature Geoscience, doi:10.1038/s41561-018-0250-1.
- Huang E., Chen Y., Schefuß E., Steinke S., Liu J., Tian J., Martínez-Méndez G., Mohtadi M., 2018. Precession and glacial-cycle controls of monsoon precipitation isotope changes over East Asia during the Pleistocene. Earth and Planetary Science Letters 494, 1-11.
- Liu J., Steinke S., Vogt C., Mohtadi M., De Pol-Holz R., Hebbeln D., 2017. Temporal and spatial patterns of sediment deposition in the northern South China Sea over the last 50,000 years. Palaeogeography, Palaeoclimatology, Palaeoecology 465, 212-224.
- Palamenghi, L., Keil, H., Spiess, V., 2015. Sequence stratigraphic framework of a mixed turbidite-contourite depositional system along the NW slope of the South China Sea. Geo-Marine Letters 35, doi:10.1007/s00367-014-0385-z.
- Mohtadi, M. and cruise participants, 2012. Report and preliminary results of RV SONNE Cruise SO 221. INVERS. Hong Kong – Hong Kong, 17.05.2012 – 07.06.2012. Berichte, Fachbereich Geowissenschaften, Universität Bremen, No. 288, 168 pages. Bremen.