The full programme book (PDF) - Royal Geographical Society

More documents

Recommendations

Info

T8 The Evolution of Periglacial Patterned Ground In East Anglia Stephen Hitchen 1 , Mark D. Bateman 1 *, Julian B. Murton 2 , Jonathan R. Lee 3 , and Philip L. Gibbard 4 1 Geography Department, Sheffield University, Winter St., Sheffield S10 2TN 2 Department of Geography, University of Sussex, Falmer, East Sussex BN1 9RH 3 British Geological Survey, Keyworth, Nottingham NG12 5GG 4 Department of Geography, University of Cambridge, Downing Place, Cambridge CB2 3EN During the Late Pleistocene, East Anglia in Britain experienced multiple cycles of periglacial activity. This research investigates whether the extensive well-developed chalkland patterned ground in this region was formed or reworked during one or more of these cycles or whether it reflects conditions during the Dimlington and/or Younger Dryas Stadials which were the last periods of intensive periglacial activity to affect lowland Britain. Using twenty-six coversand samples from six spatially diverse polygon and stripe sites, single grain optically stimulated luminescence (OSL) measurements have been used to differentiate post-depositional disturbance from sand deposited under periglacial conditions. Cluster analysis of this OSL data has been used to establish dominant ages of periglacial sand burial. These have been used to reconstruct re-activation histories of the periglacial phenomena thereby giving a better understanding of the timing and development of periglacial conditions in East Anglia. Results show multiple phases of activity within the last 90 -10 ka but nothing from earlier cold cycles. East Anglian polygons and stripes appeared to have been most active in four phases; (1) ~55-60 ka, (2) ~31-35 ka, (3) ~20-22 ka and (4) ~11-12 ka. Most sites showed some activity around the Greenland Stadial 2a and the Younger Dryas Stadial but polygon sites showed a longer and more temporally and spatially varied record than those found at stripe sites. Interpreted phases of activity mostly coincide with stadials within the last glacialinterglacial cycle, possibly at the end of climatic cold phases. Keywords: stripes; polygons; coversand; luminescence dating.
T5 Modelling the water isotope response to last interglacial changes in the West Antarctic Ice Sheet M. Holloway 1 *, P. Valdes 2 , L. Sime 3 , J. Singarayer 4 , J. Tindall 5 , M. Whipple 6 1 The British Antarctic Survey, Cambridge, UK 1 School of Geographical Sciences, University of Bristol, Bristol, UK; 2 School of Geographical Sciences, University of Bristol, Bristol, UK; 3 The British Antarctic Survey, Cambridge, UK 4 Department of Meteorology, University of Reading, Reading, UK; 5 University of Leeds, Leeds, UK; 6 School of Geographical Sciences, University of Bristol, Bristol, UK; A number of studies identify surface elevation to be a primary driver of spatial water isotope variations in Antarctic surface snow. Consequently a significant mass loss or gain of the West Antarctic Ice Sheet (WAIS) would be expected to cause changes in the water isotope record across Antarctic ice core sites. Analysis of sea level indicators for the last interglacial, around 125 to 128 ky, suggest a global sea level peak 6 to 9 m higher than present. We know from recent NEEM Greenland ice core results that Greenland likely provided a modest ~2m contribution towards this global sea level rise. This result implies that a last interglacial WAIS contribution is necessary to explain the last interglacial sea level maxima. Modelling the isotopic response to differing WAIS deglaciation scenarios using a fully coupled GCM can help isolate the contribution of individual processes and feedbacks to final isotopic signals recorded in Antarctic ice cores. This particular study uses the isotope enabled HadCM3 climate model to evaluate the spatial response of the oxygen-18 water isotope in Antarctic accumulation to altered WAIS configurations. Of particular interest are the effects of an altered WAIS configuration to changes in: atmospheric circulation patterns; moisture source regions; and the general relationship between temperature and isotopes recorded in ice cores. Model output is compared to Antarctic ice core isotopic observations to help understand how past WAIS ice sheet changes may be imprinted on Antarctic ice core water isotope records. Keywords: Paleoclimate modelling; Oxygen isotopes; Antarctic climate, West Antarctic Ice Sheet
Page 1:
QRA@50: Quaternary Revolutions QRA
Page 6 and 7:
Conference Programme Wednesday 8th
Page 8 and 9:
General Notes Exhibitors A small nu
Page 10 and 11:
QRA50: Top 50 UK Quaternary Sites N
Page 12 and 13:
THEME 1: CAUSES OF CLIMATE CHANGE C
Page 14 and 15:
THEME 2: MEASURING TIME Radiocarbon
Page 16 and 17:
THEME 3: MEASURING AND UNDERSTANDIN
Page 18 and 19:
THEME 4: MODELLING THE EARTH SYSTEM
Page 20 and 21:
modeling context, or in the context
Page 22 and 23:
THEME 5: ICE SHEET DYNAMICS Time, t
Page 24 and 25:
THEME 7: THE OCEANS The Oceans, CO
Page 26 and 27:
THEME 8: TERRESTRIAL STRATIGRAPHY A
Page 28 and 29:
THEME 9: PALAEOECOLOGY Conservation
Page 30 and 31:
THEME 9: PALAEOECOLOGY Beetles, bon
Page 32 and 33:
THEME 10: HUMAN ORIGINS, ENVIRONMEN
Page 34 and 35:
THEME 11: INSIGHTS FROM GENETICS In
Page 36:
Van Walt m onitoring your needs Del
Page 41 and 42:
T2 TRACEing Tephra Horizons in Nort
Page 43 and 44: T5 The Hebrides Ice Stream (HIS) an
Page 45 and 46: T9 Formation and Cultural Use of We
Page 47 and 48: T3 Glacier-based climate reconstruc
Page 49 and 50: T5 Reconstructing the maximum exten
Page 51 and 52: T6 First recorded evidence of subaq
Page 53 and 54: T2 Towards a Greenland tephra latti
Page 55 and 56: T5 BRITICE-CHRONO Transect 8: const
Page 57 and 58: T8 Pleistocene landscape change at
Page 59 and 60: T10 Advances in geoconservation: fu
Page 61 and 62: T7 ARAMACC: Advancing the use of an
Page 67 and 68: T5 BRITICE-CHRONO: Constraining rat
Page 69 and 70: T2 Tracing and constraining key tep
Page 71 and 72: T2 Testing the potential of OSL to
Page 73 and 74: T5 Reconstruction of ice-sheet chan
Page 75 and 76: T3 Spatial and temporal variability
Page 77 and 78: T5 Glacial geomorphology of the Inn
Page 79 and 80: T2 Revolution and evolution: 35 yea
Page 81 and 82: T5 BRITICE-CHRONO, Transect 2: cons
Page 83 and 84: T2 Improving surface exposure ages
Page 85 and 86: T5 Geomorphology and dynamics of th
Page 87 and 88: T9 The Anthropogenic Element in the
Page 89 and 90: Fraser, W.T., Watson, J.S., Sephton
Page 91 and 92: T10 Human-environment-climate inter
Page 93: T9 Island Evolution: a ‘front-lin
Page 97 and 98: T9 Biome dynamics in the Ohrid Basi
Page 99 and 100: T5 The Moffatdale RSF cluster, Sout
Page 101 and 102: T11 Combining palynology and ecolog
Page 103 and 104: Figure 1: The palm swamp forest at
Page 105 and 106: T3 SCOPSCO Lake Ohrid deep drilling
Page 107 and 108: δ 18 Odiatom); biomarkers; pollen;
Page 109 and 110: T3 Quaternary revelations: the role
Page 111 and 112: T8 Late-Middle to Late Pleistocene
Page 113 and 114: T9 Climate forcing of mammoth range
Page 115 and 116: T8 Svalbard surging glacier landsys
Page 117 and 118: T2 Constraining peatland environmen
Page 119 and 120: T9 Late - glacial/Holocene vegetati
Page 121 and 122: T10 Developing a Holocene tephrostr
Page 123 and 124: Roberts, S. J. (1997) The spatial e
Page 125 and 126: T7 Pleistocene sea-surface and inte
Page 127 and 128: T10 Man, Megafauna and Mycobacteria
Page 131 and 132: T8 The “Four Ages” of Micromorp
Page 133 and 134: T3 Continental silicon cycling and
Page 135 and 136: T5 Reconstructing plateau icefields
Page 137 and 138: T3 Exploiting multi-proxy analysis
Page 139 and 140: T3 Tipping Points: Rapid Neo-glacia
Page 141 and 142: T5 Glacial history of the central n
Page 143 and 144: T8 Reconstructing Quaternary Rhine-
Page 145 and 146:
T9 When was Europe deforested? Larg
Page 147 and 148:
T9 Long-term vegetation development
Page 149 and 150:
T9 Climate, microtopography and per
Page 151 and 152:
T3 The temperature-δ 18 O relation
Page 153 and 154:
T10 Neolithic land-use change clima
Page 155 and 156:
T5 Assessing existing dating constr
Page 157 and 158:
T10 Assessing the effects of the '2
Page 159 and 160:
Figure 1: Lake ‘Disko 2’ on Dis
Page 161 and 162:
T5 Increased channelization of subg
Page 163 and 164:
T7 Holocene controls on silicic aci
Page 165 and 166:
T8 Tanera Mor: a new stratotype for
Page 167 and 168:
T8 Landscape response to abrupt cli
Page 169 and 170:
T9 Impact of vegetation shifts on i
Page 171 and 172:
T9 Assessing seasonality changes du
Page 173 and 174:
T2 Cryptotephra records as archives
Page 175 and 176:
Westaway, R., Bridgland, D.R., Mish
Page 177 and 178:
T3 Songs from the wood: tales of th
Page 179:
T9 Lateglacial and Holocene Climate
show all

The full programme book (PDF) - Royal Geographical Society

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?