From method development to climate reconstruction: oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2011
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XX, 195 S. Ill., graph. Darst., Kt. |
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| 100 | 1 | |a Chapligin, Bernhard |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a From method development to climate reconstruction |b oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia |c von Bernhard Chapligin |
| 264 | 1 | |c 2011 | |
| 300 | |a XX, 195 S. |b Ill., graph. Darst., Kt. | ||
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| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 502 | |a Potsdam, Univ., Diss., 2011 | ||
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Datensatz im Suchindex
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| adam_text | IMAGE 1
CONTENTS
ABSTRACT / KURZFASSUNG IV
LIST OF ABBREVIATIONS VII
ACKNOWLEDGEMENTS VII
TABLE OF CONTENTS X
LIST OF FIGURES XVI
LIST OF TABLES XIX
1 INTRODUCTION 1
1.1 SCIENTIFIC BACKGROUND - ARCTIC (PALEO-) CLIMATE 1
1.1.1 RECENT AND PROJECTED ARCTIC CLIMATE CHANGE 1
1.1.2 THE NEED FOR LONG, ARCTIC RECORDS 3
1.2 SCIENTIFIC BACKGROUND - PRINCIPLES AND CHALLENGES O F ANALYSING
OXYGEN ISO
TOPES IN BIOGENIC SILICA 6
1.2.1 THE IMPORTANCE O F OXYGEN ISOTOPES IN PALEOCLIMATE RESEARCH 6
1.2.2 DIATOMS AS PALEOCLIMATE INDICATORS 6
1.2.3 METHODOLOGICAL APPROACHES AND PROMINENT CHALLENGES 8
1.3 CASE STUDY AREA - LAKE EL GYGYTGYN . 10
1.3.1 REGIONAL SETTING 10
1.3.2 LAKE DRILLINGS AND FRAMEWORK 12
1.4 AIMS AND OBJECTIVES 13
1.5 THESIS ORGANISATION 15
1.6 AUTHOR S CONTRIBUTION 16
2 MANUSCRIPT I - A HIGH PERFORMANCE, SAFE AND SEMI-AUTOMATED APPROACH ON
THE
1 8 0 ANALYSIS OF DIATOM SILICA AND NEW METHODS FOR REMOVING
EXCHANGEABLE OXY
GEN 18
2.1 ABSTRACT 18
2.2 INTRODUCTION 18
2.2.1 SCIENTIFIC BACKGROUND O F 5 18 OSI 18
2.2.2 THE HYDROUS LAYER AND ITS KNOWN REMOVAL TECHNIQUES 19
2.3 MATERIALS AND METHODS 21
HTTP://D-NB.INFO/102611487X
IMAGE 2
CONTENTS X I
2.3.1 SAMPLE MATERIAL 21
2.3.2 PURIFICATION 22
2.3.3 PROCESS OVERVIEW 22
2.3.4 REMOVAL O F EXCHANGEABLE OXYGEN (SI-OH REMOVAL) 22
2.3.5 PERIPHERY SETUP AND SAFETY PRINCIPLES 24
2.3.6 MASS SPECTROMETRIC ANALYSIS AND CALCULATION O F THE 5 L8 OSI
VALUES . . . 25
2.3.7 SOFTWARE AUTOMATION AND FAST ANALYSIS 26
2.4 RESULTS AND DISCUSSION 27
2.4.1 NEW DEHYDRATION TECHNIQUES 27
2.4.1.1 VACUUM BEAD MELTING (VBM) 27
2.4.1.2 HELIUM FLOW DEHYDRATION (HFD) 27
2.4.2 YIELD AND DETECTION LIMIT 30
2.4.3 MEMORY EFFECT AND OPERATIONAL CAPACITY 31
2.5 CONCLUSIONS 32
3 MANUSCRIPT II - INTER-LABORATORY COMPARISON OF OXYGEN ISOTOPE
COMPOSITIONS FROM
BIOGENIC SILICA 34
3.1 ABSTRACT 34
3.2 INTRODUCTION 35
3.3 MATERIALS AND METHODS 37
3.3.1 MATERIALS 37
3.3.2 METHODS USED FOR ASSESSING STANDARD PURITY AND STRUCTURE 40
3.3.3 METHODS FOR L S O ANALYSIS 40
3.3.4 TEST DESIGN AND CALIBRATION 41
3.3.5 STATISTICAL TREATMENT O F DATA 42
3.4 RESULTS AND DISCUSSION 43
3.4.1 STANDARD PURITY 43
3.4.2 STANDARD STRUCTURE 45
3.4.3 METHOD PERFORMANCE 46
3.4.3.1 STEPWISE FLUORINATION (SWF) 50
3.4.3.2 CONTROLLED ISOTOPIC EXCHANGE (CIE) 50
3.4.3.3 INDUCTIVE HIGH-TEMPERATURE CARBON REDUCTION (IHTR). . . 51
3.4.4 PROFICIENCY STUDY 52
3.4.5 CORRECTION FOR THE CEREGE VALUES 54
3.5 CONCLUSIONS 55
IMAGE 3
CONTENTS XII
4 MANUSCRIPT III - ASSESSMENT OF PURIFICATION AND CONTAMINATION
CORRECTION METH
ODS FOR ANALYSING THE OXYGEN ISOTOPE COMPOSITION FROM BIOGENIC SILICA 57
4.1 ABSTRACT 57
4.2 INTRODUCTION 58
4.2.1 ISOTOPE ANALYSIS O F BIOGENIC SILICA 58
4.2.2 PREPARATION 58
4.2.3 CONTAMINATION ASSESSMENT 59
4.2.4 DIATOM STUDIES AT LAKE EL GYGYTGYN 60
4.3 METHODS AND MATERIAL 61
4.3.1 SAMPLE MATERIAL 61
4.3.2 SAMPLE PREPARATION 62
4.3.3 CONTAMINATION ASSESSMENT 63
4.3.3.1 LIGHT MICROSCOPE (LM) 64
4.3.3.2 X-RAY FLUORESCENCE (XRF) ANALYSIS 64
4.3.3.3 INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPEC
TROSCOPY (ICP-OES) 64
4.3.3.4 SCANNING ELECTRON MICROSCOPE (SEM) AND ENERGYDISPERSIVE-X-RAY
SPECTROSCOPY (EDS) 65
4.3.4 OXYGEN ISOTOPE ANALYSIS 66
4.3.5 CORRECTIONS 66
4.4 RESULTS AND DISCUSSION _ 68
4.4.1 TESTS FOR SAMPLE PREPARATION (EDS ANALYSIS) 68
4.4.2 EFFECTIVITY O F SAMPLE PREPARATION STEPS 70
4.4.3 CONTAMINATION ASSESSMENT 71
4.4.3.1 CHEMICAL COMPOSITION 71
4.4.3.2 OPTICAL COUNTING 73
4.4.4 CORRECTIONS 74
4.4.4.1 CORRECTION TO CLAY ASSEMBLAGE 74
4.4.4.2 CORRECTION WITH AI2O3 FROM CLAY END-MEMBER 75
4.4.4.3 LINEAR REGRESSION O F CLEANING STAGES 75
4.4.5 LAKE EL GYGYTGYN 5 1 8 0 RESULTS 76
4.4.5.1 5 1 8 O W A T E R 7 6
4.4.5.2 SPECIES-EFFECT AND CORRECTION TECHNIQUE ASSESSMENT . . . . 78
4.4.5.3 S 18 0DIATOM VS. 6 1 8 O W A T E R 82
4.5 CONCLUSIONS 83
IMAGE 4
CONTENTS XIII
4.6 SUPPLEMENTARY DATA 85
4.6.1 TABLES 85
4.6.1.1 BIOVOLUME (I) CALCULATIONS BY AREA 85
4.6.1.2 BIOVOLUME (II) CALCULATIONS BY VOLUME SIZE 85
4.6.1.3 EDS RESULTS AFTER 3 PREPARATION STEPS 86
4.6.1.4 EDS RESULTS AFTER 8 PREPARATION STEPS 87
4.6.1.5 ELEMENT COMPOSITION FROM VARIOUS PURIFICATION STAGES . . . 88
4.6.2 FIGURES 89
4.6.2.1 8-STEP PREPARATION PROTOCOL 89
4.6.2.2 DIFFERENT EXCITED AREA SIZES (EDS) FOR DIFFERENT SIZE FRACTIONS
89
4.6.2.3 OVERVIEW O F ALL CORRECTION METHODS 90
5 MANUSCRIPT IV - A 250 KA OXYGEN ISOTOPE RECORD FROM DIATOMS AT LAKE
EL GYGYTGYN, FAR EAST RUSSIAN ARCTIC 91
5.1 ABSTRACT 91
5.2 INTRODUCTION 91
5.2.1 THE ARCTIC - AN IMPORTANT AREA FOR PALEOCLIMATE RECONSTRUCTION . .
. . 91
5.2.2 THE IMPORTANCE O F $ 18 ODJ A TOM RECORDS 92
5.3 MATERIALS AND METHODS 93
5.3.1 SITE DESCRIPTION, MATERIAL AND AGE MODEL 93
5.3.2 METHODS 94
5.3.2.1 PREPARATION 94
5.3.2.2 ISOTOPE ANALYSIS 95
5.3.2.3 CONTAMINATION ASSESSMENT AND CORRECTION TECHNIQUE . . . . 96
5.3.2.4 SPECIES ASSESSMENT 96
5.3.2.5 FTIR ANALYSIS FOR STUDYING DIAGENETIC EFFECTS 96
5.4 RESULTS 97
5.4.1 DIATOM ASSEMBLAGE 97
5.4.2 CONTAMINATION ASSESSMENT AND CORRECTION 98
5.4.3 5 18 ODIATOM RECORD 98
5.4.4 DIAGENETIC EFFECTS 99
5.5 DISCUSSION 100
5.5.1 5 18 0 ISOTOPE CONTROLS 100
5.5.1.1 LAKE TEMPERATURE, BLOOMING PERIOD AND 5 1 8 O W A T E R 100
5.5.1.2 LAKE HYDROLOGY, ICE-COVER AND S 1 8 O P 101
IMAGE 5
CONTENTS XIV
5.5.1.3 AIR TEMPERATURE, AIR MASS SOURCE AND CONTINENTALITY . . . . 102
5.5.2 COMPARISON WITH OTHER LAKE EL GYGYTGYN RECORDS 103
5.5.2.1 S 18 ODIATOM HOLOCENE STUDY 103
5.5.2.2 BIOGENIC SILICA, TI02, MAGNETIC SUSCEPTIBILITY 104
5.5.3 COMPARISON WITH OTHER REGIONAL AND GLOBAL CLIMATE RECORDS 106
5.5.4 PALEOCLIMATE INTERPRETATION 107
5.5.5 DIAGENETIC EFFECT 108
5.6 CONCLUSIONS 109
6 SUMMARY AND CONCLUSIONS 111
7 OUTLOOK 115
REFERENCES 117
A ANNEX 141
A . L SUPPLEMENTARY TABLES AND FIGURES 141
A . L . L CHAPTER 2 141
A.L.1.1 LEAK TESTS 141
A. 1.1.2 CALIBRATION OF THE OXYGEN REFERENCE GAS 142
A. 1.1.3 BEAD PREPARATION TESTS 143
A. 1.1.4 CLEANING O F THE PLATE 146
A. 1.1.5 PRELIMINARY OVEN TESTS 146
A. 1.1.6 TESTING THE MOLECULAR SIEVE FOR MEMORY EFFECTS 147
A.L.2 CHAPTER 3 148
A.L.2.1 CNS RESULTS 148
A. 1.2.2 INTER-LABORATORY COMPARISON, SINGLE 5 18 0 VALUES 149
A. 1.3 CHAPTER 4 - SUPPLEMENTARY DATA (NOT INCLUDED IN MANUSCRIPT III) .
. . 157
A.L.3.1 PREPARATION PROCESS - DETAILED STEP DESCRIPTIONS 157
A.L.3.2 TESTING DIFFERENT DIATOM SIZE FRACTIONS IN ULTRASOUND . . . .
159
A. 1.3.3 TESTING THE PREPARATION PROCEDURE - EDS RESULTS FOR MAJOR
ELEMENTS 160
A. 1.3.4 SPECIES COUNTING UNDER THE L M AND CALCULATION O F THE BIO-
VOLUMES 162
A.L.3.5 CALCULATING THE CORRECTION FOR LAKE EL GYGYTGYN SAMPLES 165
A. 2 HOLOCENE OXYGEN ISOTOPE RECORD O F DIATOMS FROM LAKE KOTOKEL
(SOUTHERN
SIBERIA, RUSSIA) AND ITS PALAEOCLIMATIC IMPLICATIONS 167
IMAGE 6
CONTENTS X V
A.2.1 ABSTRACT 167
A.2.2 INTRODUCTION 168
A.2.3 STUDY AREA 170
A.2.4 MATERIALS AND METHODS 171
A.2.4.1 CORE LITHOLOGY AND AGE DETERMINATION 171
A.2.4.2 DIATOM RECORD 171
A.2.4.3 SAMPLE CLEANING 172
A.2.4.4 CONTAMINATION ASSESSMENT 173
A.2.4.5 OXYGEN ISOTOPE ANALYSIS 174
A.2.4.6 THE GRADE O F PURIFICATION O F DIATOMS AND CONTAMINATION COR
RECTION 175
A.2.4.7 WATER SAMPLING AND STABLE WATER ISOTOPE ANALYSIS 177
A.2.5 RESULTS 179
A.2.5.1 OXYGEN ISOTOPE RECORD O F DIATOMS 179
A.2.5.2 ISOTOPE COMPOSITION O F LAKE WATER AND ATMOSPHERIC PRECIPI
TATION 179
A.2.6 DISCUSSION 181
A.2.6.1 HYDROLOGICAL AND METEOROLOGICAL BACKGROUND FOR THE INTER
PRETATION O F THE LAKE KOTOKEL DIATOM ISOTOPE RECORD . . . . 181
A.2.6.2 HOLOCENE OXYGEN ISOTOPE RECORD O F THE KTK2 CORE 183
A.2.6.3 INTER-AND EXTRA-REGIONAL COMPARISON 187
A.2.7 CONCLUSIONS 190
A.3 INSTRUMENT DEVELOPMENT FOR A COMBINED DETERMINATION O F SILICON AND
OXYGEN
ISOTOPES FROM BIOGENIC SILICA 192
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| spelling | Chapligin, Bernhard Verfasser aut From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia von Bernhard Chapligin 2011 XX, 195 S. Ill., graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Potsdam, Univ., Diss., 2011 Paläoklimatologie (DE-588)4173112-8 gnd rswk-swf Ozero El'gygytgyn (DE-588)4849518-9 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Ozero El'gygytgyn (DE-588)4849518-9 g Paläoklimatologie (DE-588)4173112-8 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024792154&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Chapligin, Bernhard From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia Paläoklimatologie (DE-588)4173112-8 gnd |
| subject_GND | (DE-588)4173112-8 (DE-588)4849518-9 (DE-588)4113937-9 |
| title | From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia |
| title_auth | From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia |
| title_exact_search | From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia |
| title_full | From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia von Bernhard Chapligin |
| title_fullStr | From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia von Bernhard Chapligin |
| title_full_unstemmed | From method development to climate reconstruction oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia von Bernhard Chapligin |
| title_short | From method development to climate reconstruction |
| title_sort | from method development to climate reconstruction oxygen isotope analysis of biogenic silica from lake elg ygytgyn ne siberia |
| title_sub | oxygen isotope analysis of biogenic silica from Lake Elg'ygytgyn, NE Siberia |
| topic | Paläoklimatologie (DE-588)4173112-8 gnd |
| topic_facet | Paläoklimatologie Ozero El'gygytgyn Hochschulschrift |
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