The next INQUA Congress will be held in Nagoya (Japan) on July 27 – August 2, 2015
This is a call for contributions to session P05 on ‘Climate change in the tropical South Pacific during the Late Quaternary’.
The session abstract is as follows:
Establishing well dated, quantitative, highly resolved palaeoclimate data for the major climate systems of the tropical south Pacific has become a research priority owing to the paucity of instrumental data from this critical region of the Earth. Whilst the quantity of proxy climate data for this region is increasing rapidly, compared to records from the Northern Hemisphere there is a surprising paucity especially when considering the importance of this region to global climate. Such information is vital for fully understanding inter-hemispheric climate linkages, global energy fluxes and the long-term evolution of natural climate variability such as the El Nino-Southern Oscillation. The dearth of pre-industrial climate records from this region contributes to large uncertainties associated with future climate change impacts far beyond the south Pacific. This session aims to bring together researchers working on Late Quaternary ocean/climate proxies with those whose research lies in modelling ocean-climate processes and dynamics in the tropical south pacific region, and their implications for global climate.
We hope this session will be of interest to you. If you plan to contribute to this session, please submit your abstract before December 20, 2014 click here.
Well, we’ve heard from Wes and Adele, and now it’s my turn (Phil Jardine) for a bit of a chat on the “Ecology of the past” YouTube channel. Similar to the previous interview videos, I’m talking about my role on the Bosumtwi pollen chemistry project, and what I’ve done (academically speaking) prior to coming to the Open University. Enjoy!
Photo taken close by the study site. The road that pass through Eastern Andes, and the magnificent Montane forest of western Amazonia behind. (Photo by M. L. Cárdenas)
Who would have thought that building a road in Andes would have allowed us to gain new and unique insight of pristine western- Amazonian forests? (I would have thought completely the opposite). Initially Patricia Mothes, chief of the volcanologist section of the Intituto de Geofisica in Ecuador, was called to look at sediments exposed by road works on the eastern flank of the Ecuadorian Andes. Arriving at the site she found thick (>20 vertical meters) deposits of grayish and dark brown interbedded layers of sediments which looked like they have been recently deposited. At closer inspection Patricia discovered that there were even wood pieces and leaves within the dark sediments (now known to be highly organic) that had the appearance of have been deposited within modern time. She wanted to know more. So a PhD student was recruited (a.k.a. Macarena Cárdenas) to work with the sediments at the Palaeoenvironmental Change Research Group at the Open University under the supervision of Dr William Gosling… And so the study began.
After several years spent dating the sediments, analyzing their composition (physical and elemental) and the fossils (pollen and wood) contained within them preliminary insights into vegetation change on the eastern Andean flank during the middle Pleistocene (c. 200,000-300,000 years ago) were revealed and published (Cárdenas et al., 2011a; Cárdenas et al., 2011b). Further work covering stratigraphically lower sediments (older than those previously published; c. 500,000 year) and more detailed sedimentary and fossil analysis of the entire sequence completed a PhD thesis (Cárdenas, 2011).
I am now pleased to announce that the extended work included in my PhD thesis has now been published in a new article in Palaeogeography, Palaeoclimatology, Palaeoecology (Cárdenas et al., online). The new paper is an extended version from previous publications from the same research and provides further evidence of the unique insights that can be gained from palaeoenvironmental studies in this region. These are some of the oldest Quaternary sediments ever discovered and studied from the mid-elevation eastern Andean flank / western Amazon and upon their analyses we were able to get for the first time an insight of how human-untouched Amazonian forests were back in time (up to 500,000 years ago!), how was their diversity and how they responded to intense volcanic activity and climatic change.
By Dr Macarena L. Cárdenas
Cárdenas, M.L. (2011) The response of western Amazonian vegetation to fire and climate change: A palaeoecological study. In: Department of Earth & Environmental Sciences, p. 242. The Open University, Milton Keynes
Cárdenas, M.L., Gosling, W.D., Pennington, R.T., Poole, I., Sherlock, S.C. & Mothes, P. (online) Forests of the tropical eastern andean flank during the middle pleistocene. Palaeogeography, Palaeoclimatology, Palaeoecology. DOI:10.1016/j.palaeo.2013.10.009
Cárdenas, M.L., Gosling, W.D., Sherlock, S.C., Poole, I., Pennington, R.T. & Mothes, P. (2011a) The response of vegetation on the Andean flank in western Amazonia to Pleistocene climate change. Science, 331, 1055-1058. DOI: 10.1126/science.1197947
Cárdenas, M.L., Gosling, W.D., Sherlock, S.C., Poole, I., Pennington, R.T. & Mothes, P. (2011b) Response to comment on “the response of vegetation on the Andean flank in western Amazonia to Pleistocene climate change”. Science, 333, 1825. DOI: 10.1126/science.1207888
Hello! I’m Adele and I started my PhD about a week ago. It’s been a little intense but I can almost find the lab without a map now, so it is probably time to introduce myself.
I’ll be studying pollen-vegetation relationships in Ghana, as part of the NERC funded project ‘500,000 years of solar irradiance, climate and vegetation changes’. This means I’ll be using pollen traps to figure out how pollen outputs vary between (and sometimes within) different vegetation types in Ghana. I will also be trying my hand at chemotaxonomy and video making. I’m heading out to Ghana (along with Phil Jardine) in just over a week to do my first lot of field work which will involve seeing the plots, collecting existing traps, replacing them with new ones, and setting up some new sites. I’m very excited.