New aspects on the late to post glacialdeglaciation around the Nilgiri Himal andthe southern Thakkola (Nepal Himalaya)    ...
paleoclimate research in the Himalaya•    rating of the present climate and modelling of future climate trends     require...
paleoclimate research in the Himalaya•    rating of the present climate and modelling of future climate trends     require...
Markus Wagner   4
Last Glacial Maximum for High Asia after Kuhle (2004)Markus Wagner                                            5
Last Glacial Maximum for High Asia after Zhou et al. (2004) Markus Wagner                                           6
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Kuhle (1982)  Fort (2000)Markus Wagner    9
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TCN dating: 2.1 ± 1.7 and 0.6 ka BP (Zech et al. 2009)   Markus Wagner                                         18
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TCN dating: 18188 ± 3084 and 23007 ± 4397 a BP (Gayer et al. 2004)              28 ka ± 3 ka BP (Zech et al. 2009)   Marku...
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soil profiles of the investigation areasMarkus Wagner                                              23
pedological relative datingproof of the degree of soil development by:1. formation of pedogenic iron and aluminium oxi-hyd...
Exemplarily assortment of pedological weathering indices, Thini Kholawell chrystallised iron oxides: total iron ratio     ...
Exemplarily assortment of pedological weathering indices, Dhampu Basin pedogenic iron oxides: total iron ratio   Modfied W...
Exemplarily assortment of pedological weathering indices, Kali Gandaki south of                             the Higher Him...
Synoptical discussion of the results•   The own geomorphological investigations confirm the more extended last    high gla...
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New aspects of the late to post glacial deglaciation around the Nilgri Himal and the southern Thakkola (Nepal Himalaya) [Markus Wagner]

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New aspects of the late to post glacial deglaciation around the Nilgri Himal and the southern Thakkola (Nepal Himalaya). Presented by Markus Wagner at the "Perth II: Global Change and the World's Mountains" conference in Perth, Scotland in September 2010.

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New aspects of the late to post glacial deglaciation around the Nilgri Himal and the southern Thakkola (Nepal Himalaya) [Markus Wagner]

  1. 1. New aspects on the late to post glacialdeglaciation around the Nilgiri Himal andthe southern Thakkola (Nepal Himalaya) Markus Wagner Northwest German Forest Research Station Goettingen Germany
  2. 2. paleoclimate research in the Himalaya• rating of the present climate and modelling of future climate trends requires knowledge of climate and climate change in the past • extent and chronology of pleistocene glaciation • extent: glaciogeomorphology • chronology: relative: e.g. glaciogeomorphology, pedology • chronology: absolute: e.g. 14C, TL, OSL, TCN Markus Wagner 2
  3. 3. paleoclimate research in the Himalaya• rating of the present climate and modelling of future climate trends requires knowledge of climate and climate change in the past • extent and chronology of pleistocene glaciation • extent: glaciogeomorphology • chronology: relative: e.g. glaciogeomorphology, pedology • chronology: absolute: e.g. 14C, TL, OSL, TCN Markus Wagner 3
  4. 4. Markus Wagner 4
  5. 5. Last Glacial Maximum for High Asia after Kuhle (2004)Markus Wagner 5
  6. 6. Last Glacial Maximum for High Asia after Zhou et al. (2004) Markus Wagner 6
  7. 7. Markus Wagner 7
  8. 8. Markus Wagner 8
  9. 9. Kuhle (1982) Fort (2000)Markus Wagner 9
  10. 10. Markus Wagner 10
  11. 11. Markus Wagner 11
  12. 12. Markus Wagner 12
  13. 13. Markus Wagner 13
  14. 14. Markus Wagner 14
  15. 15. Markus Wagner 15
  16. 16. Markus Wagner 16
  17. 17. Markus Wagner 17
  18. 18. TCN dating: 2.1 ± 1.7 and 0.6 ka BP (Zech et al. 2009) Markus Wagner 18
  19. 19. Markus Wagner 19
  20. 20. Markus Wagner 20
  21. 21. TCN dating: 18188 ± 3084 and 23007 ± 4397 a BP (Gayer et al. 2004) 28 ka ± 3 ka BP (Zech et al. 2009) Markus Wagner 21
  22. 22. Markus Wagner 22
  23. 23. soil profiles of the investigation areasMarkus Wagner 23
  24. 24. pedological relative datingproof of the degree of soil development by:1. formation of pedogenic iron and aluminium oxi-hydroxides2. changing total element concentrations due to the element specific mobilisation and leaching affinity3. grain size distribution of fine earth Markus Wagner 24
  25. 25. Exemplarily assortment of pedological weathering indices, Thini Kholawell chrystallised iron oxides: total iron ratio  Na  a Mg a K  a Ca  a  WI(P)    0,35  0,9  0,25  0,7  100   clay mass Markus Wagner 25
  26. 26. Exemplarily assortment of pedological weathering indices, Dhampu Basin pedogenic iron oxides: total iron ratio Modfied Weathering Potential Index (Na2O+K2O+CaO+MgO)/(Na2O+K2O+ CaO+MgO+Al2O3+Fe2O3+SiO2)*100 clay massMarkus Wagner 26
  27. 27. Exemplarily assortment of pedological weathering indices, Kali Gandaki south of the Higher Himalaya well chrystallised iron oxides: total iron ratio Clay Accumulation Index Markus Wagner 27
  28. 28. Synoptical discussion of the results• The own geomorphological investigations confirm the more extended last high glacial glaciation found in the literature• ELA depressions of at least 1300 m can be reonstructed; this is in conformity with results from neighbouring regions• lower and highly variable maximum ELA depressions, which are explained by a weaker and shifting monsoon, can not be confirmed by geomorphological investigations• for pedological relative dating of moraines in the Himalaya similar conditions of soil formation, and sufficient precipitation amounts are required; in the central part of the Higher Himalaya around the Nilgiri- Himal this is on the south-face of the Higher Himalaya extreme topography and strong human influence prevent a for that necessary continous soil development Thank you very much for your attention !!! Markus Wagner 28

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