Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia:
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| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2012
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 140 S. Ill., graph. Darst., Kt. |
Internformat
MARC
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| 100 | 1 | |a Biskaborn, Boris K. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia |c von Boris K. Biskaborn |
| 264 | 1 | |c 2012 | |
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| 502 | |a Potsdam, Univ., Diss., 2012 | ||
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| adam_text | IMAGE 1
TABLE OF CONTENTS
ACKNOWLEDGMENTS V
TABLE OF CONTENTS VII
LIST OF ILLUSTRATIONS IX
LIST OF TABLES X
LIST OF ABBREVIATIONS X
ABSTRACT 11
KURZFASSUNG 13
1. INTRODUCTION 15
1.1. PREFACE AND THESIS ORGANISATION 15
1.2. RESEARCH MOTIVATION AND RELEVANCE 15
1.3. ENVIRONMENTAL SETTING 16
1.3.1. GEOGRAPHY AND GEOLOGY 16
1.3.2. CLIMATE 18
1.3.3. VEGETATION 19
1.4. REGIONAL LATE PLEISTOCENE AND HOLOCENE ENVIRONMENTAL HISTORY 20
1.4.1. NORTHERN HEMISPHERE PALAEOCLIMATE FORCING 20
1.4.2. LATE PLEISTOCENE GLACIATION HISTORY 21
1.4.3. LATE GLACIAL AND HOLOCENE ENVIRONMENTS 21
1.4.4. HUMAN IMPACT 22
1.5. KNOWLEDGE GAPS, AIMS AND OBJECTIVES 22
1.6. METHODOLOGICAL OVERVIEW 23
1.6.1. FIELD WORK 24
1.6.2. AGE-DEPTH MODELLING 24
1.6.3. THE NEED FOR A MULTI-PROXY APPROACH 26
1.6.4. DIATOMS 26
1.7. OVERVIEW AND STATUS OF THE MANUSCRIPTS 29
2. MANUSCRIPT I: ENVIRONMENTAL VARIABILITY IN NORTHEASTERN SIBERIA
DURING THE LAST ~13,300 YEARS
INFERRED FROM LAKE DIATOMS AND SEDIMENT-GEOCHEMICAL PARAMETERS 31
2.1. INTRODUCTION 32
2.2. STUDY SITE 33
2.3. MATERIALS AND METHODS 35
2.3.1. FIELD WORK 35
2.3.2. LABORATORY ANALYSES 35
2.4. RESULTS 39
2.4.1. CHRONOLOGY (AGE-DEPTH MODEL) 39
2.4.2. SEDIMENTOLOGY AND GEOCHEMISTRY 40
2.4.3. DIATOM ANALYSIS 43
2.5. DISCUSSION 47
2.5.1. LAKE GENESIS AND ENVIRONMENTAL HISTORY DURING THE LATE GLACIAL 47
2.5.2. EARLY HOLOCENE 49
2.5.3. NEOGLACIAL 52
2.5.4. SUBRECENT LAKE DEVELOPMENT 53
2.5.5. REGIONAL PALAEOENVIRONMENTAL IMPLICATIONS 54
2.6. CONCLUSIONS 55
2.7. SUPPLEMENTARY MATERIAL 57
3. MANUSCRIPT II: LATE HOLOCENE THERMOKARST VARIABILITY INFERRED FROM
DIATOMS IN A LAKE SEDIMENT
RECORD FROM THE LENA DELTA, SIBERIAN ARCTIC 59
3.1. INTRODUCTION 59
VII
HTTP://D-NB.INFO/102840302X
IMAGE 2
3.2. STUDY SITE 61
3.3. MATERIALS AND METHODS 63
3.3.1. FIELD WORK 63
3.3.2. LABORATORY ANALYSES 63
3.4. RESULTS 66
3.4.1. CHRONOLOGY 66
3.4.2. SEDIMENT GEOCHEMISTRY 67
3.4.3. DIATOMS 69
3.5. DISCUSSION 72
3.5.1. PALAEOENVIRONMENTAL CHANGES INFERRED FROM THE PG1972-1 SEDIMENT
CORE 72 3.5.2. ECOSYSTEM RESPONSE TO THERMOKARST LAKE DEVELOPMENT AND
CLIMATE CHANGE 76 3.6. CONCLUSIONS 77
4. MANUSCRIPT III: PHYSICO-CHEMICAL PROCESSES AND CYCLIC DEPOSITIONAL
EVENTS IN THERMOKARST
LAKES OF THE NE SIBERIAN TUNDRA 79
4.1. INTRODUCTION 79
4.2. STUDY AREA 81
4.2.1. REGIONAL ENVIRONMENTAL SETTING 81
4.2.2. LAKE EL GENE-KYUELE (LENA HINTERLAND) 81
4.2.3. LAKE 09-TIK-03 (LENA DELTA) 83
4.3. METHODS 85
4.3.1. FIELD WORK 85
4.3.2. LABORATORY ANALYSES 85
4.4. RESULTS 89
4.4.1. LAKE EL GENE-KYUELE (LENA HINTERLAND) 89
4.4.2. LAKE 09-TIK-03 (LENA DELTA) 93
4.5. DISCUSSION 95
4.5.1. PHYSICO-CHEMICAL DATA AS PROXIES FOR SEDIMENTARY PROCESSES 95
4.5.2. INTERPRETATION OF THERMOKARST RELATED LIMNOGEOLOGICAL PROCESSES
99
4.5.3. PALAEOENVIRONMENTAL IMPLICATIONS 104
4.6. CONCLUSIONS 105
4.6.1. PROXIES 105
4.6.2. PROCESSES 105
5. SYNTHESIS 107
5.1. COMPARATIVE ASSESSMENT OF THE LAKE SYSTEMS AS ENVIRONMENTAL
ARCHIVES 107 5.1.1. PRECONDITIONS OF SEDIMENT ARCHIVE FORMATION 107
5.1.2. SUBRECENT LAKE AREA CHANGES 108
5.1.3. CLIMATE FORCING SUPERIMPOSED BY THERMOKARST DYNAMICS 109
5.2. PALAEOCLIMATIC INSIGHTS AND ENVIRONMENTAL DYNAMICS 111
5.2.1. MAIN PALAEOCLIMATIC OUTCOME OF THE THESIS - THE HTM CRITICALLY
JUGED 112 5.2.2. PALAEOLIMNOLOGICAL RELEVANCE OF THE FOREST-TUNDRA
ECOTONE 114
5.2.3. THE NORTH-SOUTH GRADIENT AND THE IMPACT OF THE LAPTEV SEA 115
5.2.4. ABUNDANCE AND LACK OF DIATOMS 116
5.3. PERSPECTIVES 116
5.3.1. DATING 116
5.3.2. TEMPORAL RESOLUTION 117
5.3.3. CATCHMENT AND SUBSURFACE STUDIES 117
5.3.4. RESEARCH ON FRESHWATER DIATOMS IN NE SIBERIA 118
6. REFERENCES 119
APPENDIX A: EXTENDED ABSTRACT LONG SEDIMENT CORES FROM LAKE EL GENE
KYUELE 135
APPENDIX B: DATA 137
LIST OF DIATOM TAXA 137
DATA AVAILABILITY IN PANGAEA 140
VIII
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| discipline | Geologie / Paläontologie |
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| spelling | Biskaborn, Boris K. Verfasser aut Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia von Boris K. Biskaborn 2012 140 S. Ill., graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Potsdam, Univ., Diss., 2012 (DE-588)4113937-9 Hochschulschrift gnd-content DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025377647&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Biskaborn, Boris K. Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia |
| subject_GND | (DE-588)4113937-9 |
| title | Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia |
| title_auth | Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia |
| title_exact_search | Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia |
| title_full | Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia von Boris K. Biskaborn |
| title_fullStr | Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia von Boris K. Biskaborn |
| title_full_unstemmed | Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia von Boris K. Biskaborn |
| title_short | Holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern Siberia, Russia |
| title_sort | holocene environmental variability inferred from lake diatoms and sediment geochemistry in northeastern siberia russia |
| topic_facet | Hochschulschrift |
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