Oxygen isotope evidence for a stronger winter monsoon current during the last glaciation

Changes in C<sub>3</sub>/C<sub>4</sub> vegetation in the continental interior of the Central Himalayas associated with monsoonal paleoclimatic changes during the last 600 kyr

“…Most of the paleoclimatic studies on Indian Ocean marine sediments have reported that the SW summer monsoon was stronger during interglacial periods and weaker during glacial periods (e.g. Prell and Van Campo, 1986;Sarkar et al, 1990). Although Niitsuma et al (1991) concluded that the climate of the Arabian Peninsula was more humid during glacial periods with weak SW monsoons, our results confirmed that increased aridity on the Indian subcontinent during glacial ages resulted in the expansion of C 4 plants.…”

“…Many paleoclimatic records from Indian Ocean and Arabian Sea marine sediment cores indicate that the SW monsoon was stronger during interglacial periods and weaker during glacial periods (Van Campo et al, 1982;Prell and Van Campo, 1986;Sarkar et al, 1990;Muzuka, 2000). Although monsoonal climate change affects both continents and oceans, terrestrial information on these changes in the Indian subcontinent is very limited (Krishnamurthy et al, 1986;Agrawal et al, 1989;Sakai, 2001).…”

Origin of sulphur in soil and water in a Precambrian terrain, S. India.

“…This is witnessed by the Holocene sediments off the westcoast which show the ab sence of the presentday dilution of surface waters during the southwest monsoon (Van Campo et al, 1982). There is evidence that the monsoonal winds were strong but not giving rise to precipitation (Sarkar et al, 1990). The sulphur isotopic composition of the ground waters indicates that one source is the gypsum concretions (Fig.…”

“…The last arid period on the pen insula occurred during the last glaciation lasting for about 10 kyr (Duplessy, 1982;Van Campo et al, 1982;Prell and Van Campo, 1986;Sarkar et al, 1990). This is witnessed by the Holocene sediments off the westcoast which show the ab sence of the presentday dilution of surface waters during the southwest monsoon (Van Campo et al, 1982).…”

High Arabian Sea productivity conditions during MIS 13 – odd monsoon event or intensified overturning circulation at the end of the Mid-Pleistocene transition?

“…The main aim of the investigation of this core was to investigate the paleoceanographic changes in the Arabian Sea during the MPT, since numerous studies only document these in great detail from the past 400 000 years (Almogi-Labin et al, 2000;Altabet et al, 2002;Anderson et al, 2002;Budziak et al, 2000;Clemens et al, 1991;Prell, 1990, 2003;Emeis et al, 1995;Gupta et al, 2003;Ishikawa and Motoyoshi, 2007;Ivanova et al, 2003;Jaeschke et al, 2009;Sirocko, 2000, 2003;Lückge et al, 2001;Naidu and Malmgren, 1996;Naidu, 2006;Pattan et al, 2003;Prabhu and Shankar, 2005;Prell et al, 1980;Prell and Campo, 1986;Prell and Kutzbach, 1992;Reichart et al, 1997Reichart et al, , 1998Reichart et al, , 2002Reichart et al, , 2004Rostek et al, 1993Rostek et al, , 1997Saher et al, 2007;Sarkar et al, 1990;Schmiedl and Leuschner, 2005;Schulte et al, 1999;Schulz et al, 1998;Sirocko et al, 1993Sirocko et al, , 1996Wang et al, 2005a). Using a multi-proxy approach, we will report on the complex interplay of summer monsoon upwelling-related productivity changes, OMZ intensity, glacial-interglacial variability in intermediate water contributions, supralysoclinal carbonate dissolution and winter monsoon-related deep-mixing events.…”