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ABOUT ME


I am a Physical Geographer and Quaternary Scientist. From September, 2014 I will be based in the Geography department at the University of Manchester from September as a Lecturer in Physical Geography. 

My research interests lie within understanding the dynamics of dryland systems, including environmental change, landscape dynamics and groundwater resources. 

I am interested in these processes and dynamics over a range of timescales and address two broad themes:
  • Chemical tracers as novel archives of groundwater recharge and palaeomoisture.
  • late Quaternary (~250,000 years) landscape dynamics using geoproxies (including sand dunes, water-lain sediments and fluvial tufa and applying OSL and U-series dating).


CURRENT RESEARCH PROJECTS

1) Chemical Tracers as novel archives

A) Rainfall in the desert sand

With the Thesiger-Oman International Fellowship from the Royal Geographic Society I sampled linear dunes above the Stampriet Aquifer in southern Namibia to investigate rates of recharge to groundwater over the past few decades in the region. The data also provides a record of relative moisture changes through time, which is a novel proxy for moisture availability in the desert environment. Read research report. 

And thanks also to the British Society for Geomorphology, who have awarded me a small Reseach Grant, which completed funding for the first phase of fieldwork and laboratory analysis. 

The second phase of fieldwork started in April, 2013, and i
nvestigates whether geomorphological setting controls variations in the records preserved. Thanks to the Quaternary Research Association for funding towards this second phase.


B) Palaeomoisture records in the sandy deserts

With Mike Edmunds I am reviewing the application and developments of using  chemical proxies in sand dunes and sediments (the unsaturated zone) as novel proxies for past moisture availability. 

2) Quaternary environmental dynamics using geoproxies

A) Casting new light on Quaternary environmental change in the Namib Desert.


The application of optically stimulated luminescence (OSL) in the Namib Desert is casting new light on the nature and dynamics of late Quaternary environments in the region. See my paper in press in the Journal of Arid Environments, and chapter in The CHANGING DESERTS - Integrating people and their environments book

Have a look at the coverage on BBC Earth News, and Oxford Uni news on the Oxford Deserts conference featuring pictures from my fieldwork in the Namib Desert.

B) Dating generations of dunes


The Namib Dese
rt is one of the earth's oldest deserts. Above the semi-consolidated, tertiary-aged Tsondab Sandstone, lies the the Namib Sand Sea (the unconsolidated dunes). This sand sea contains a range of dune types, and amongst the largest dune forms found on earth. There is a paucity of chronological control for these dunes with three previous studies, providing a handful of ages. This study aims to provide new OSL (optically stimulated luminescence) ages in a region of 'dendritic dune morphology'. The different sizes and orientations of dunes appear to represent very different conditions.


TEACHING

I teach Physical Geography at The University of Manchester

First Year:
GEOG12011 Tutorials and Book Review.

Third Year:
GEOG30702 Geography in the 21st Century.
I contribute lectures on the course.
GEOG20532 Dryland Environments: Past, Present and Future.
I am the course leader for this new option course for third year students. Follow tweets (@AbiStone relevant to the course #DPPF2015

As a visiting research associate at the University of Oxford I contribute a lecture on Hydrogeology for the Climate and Catchment Processes module on the Water Science Policy and Management MSc.

Previously I taught Physical Geography at the University of Oxford, most recently at St John's College. This included: 
  • Prelims (First year) Physical Geography (Earth System Processes): Climatology, Geomorphology, Ecology of the Biosphere.
  • Prelims Geographical Techniques: Statistics, Earth Observation.
  • Prelims Geographical Controversies. 
  • Final Honours School Physical Geography (Earth System Dynamics): Earth's Climate: past, present and future; Landscapes and the Earth System. 
  • Final Honours School Environmental Geography; Land degradation and desertification; Biodiversity loss; African environmentalism
  • Final Honours School Geographical Research Methods 
I was also a tutor for the Quaternary Period and Dryland Environments special subjects for Final Honours School at the School of Geography and the Environment


CURRENT NEWS


1) RECENT CONFERENCES relating to research on using the portable luminescence reader as applied to the sediments of the Namib Sand Sea. 

This started with a comparison of portable reader and full OSL dating for samples taken from a transect across a linear dune in the south of the sand sea (of Holocene age) and has progressed to a comparison of the two methods for two sites and samples spanning, near-modern, late Holocene and into the last interglacial (100, 000 years plus). 



2) RECENT PUBLICATIONS on southern African Quaternary environments 

Here are some thoughts on the puzzle of LGM climate and environmental conditions in southern AfricaI'm interested to hear any views on this and the on ways forward...


3) GROUNDWATER and the UNSATURATED ZONE in drylands 
 
In the (only very slightly soggy) sands of the Kalahari, some locations contain a lot of nitrate. Is this sheep pee or has it been biologically produced by vegetation that behaves in transient manner across landscapes over decades?  Read here for what I and Mike Edmunds think, and you decide

On 29th October I am attending The Nitrogen Cycle and the Anthropocene at BSG, Keyworth, Nottingham, where I will present a poster on this same paper.   


RECENT PUBLICATIONS

5 most recent here, view publications page for more (and for copies of these publications please email me) 


Stone, A. E. C. (2014) Last Glacial Maximum conditions in southern Africa: Are we any closer to understanding the climate of this time period? Progress in Physical Geography. 

Stone, A. E. C.
, Edmunds, W. M. (2014) Naturally-high nitrate in the unsaturated zone sand dunes above the Stampriet Basin, Namibia. Journal of Arid Environments 105, 41-51.

Stone, A. E. C.
(2013) Age and dynamics of the Namib Sand Sea: A review of chronological evidence and possible landscape development models. Journal of African Earth Sciences 82, 70-87.  


Stone, A. E. C.
, and Thomas, D. S. G. (2013 - online view since 2011) Casting new light on late Quaternary environmental and palaeohydrological change in the Namib Desert: A review of the application of optically stimulated luminescence in the region. Journal of Arid Environments 93, 40-58. 

Stone, A. E. C.
 
Edmunds, W. M. (2012) Sand, salt and water in the Stampriet Basin,Namibia: Calculating unsaturated zone (Kalahari dune-field) recharge using thechloride mass balance approach.Water SA 38(3), 367-377


PUBLIC OUTREACH



I prepared a FACT SHEET for visitors to the Kalahari Anib Lodge, Namibia (to whom we are very grateful for granting us permission to sample dunes). Dr Chris Brown, chairman of the Gondwana Collection environmental committee has developed this into a large tourist infomation board.

LINKS

Interesting links...

Quaternary Science and Soil/Sand Gets Speedy
 

My colleauge Matt was contacted by these speed-seekers, who want to understand more about the composition of the pan surface in South Africa they plan to tear across with a hybrid rocket and Eurofighter-Typhoon jet engine! ZOOM...



Gobabeb - 50 years persistent research and fascination
A wonderful place in the desert, hosting both SAAG and SAASQUA conferences in 2012. As part of the celebrations (and to  honour Mary Seely's 70th Birthday) I have paper in JofAE. 



Useful Quaternary Science datasources 
can be found be obtained and downloaded from:

OTHER STUFF

I enjoy playing sports taking photos and listening to new music, including local bands Stornaway and Little Fishand further flung artists, such as Mark Bethune.





PHOTO OF THE MONTH



Desert refreshment
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