A5032264905- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Karst Systems and Hydrogeology
- Archaeology and ancient environmental studies
- Maritime and Coastal Archaeology
- Marine and environmental studies
- Isotope Analysis in Ecology
- Geological and Geophysical Studies Worldwide
- Relativity and Gravitational Theory
- Methane Hydrates and Related Phenomena
- Aeolian processes and effects
- Forensic Anthropology and Bioarchaeology Studies
- Cosmology and Gravitation Theories
- Coastal and Marine Dynamics
- Botany and Plant Ecology Studies
- Atmospheric Ozone and Climate
- Ecology and Vegetation Dynamics Studies
- Advanced Differential Geometry Research
- Pasture and Agricultural Systems
- Paleontology and Stratigraphy of Fossils
- Atmospheric and Environmental Gas Dynamics
- Toxin Mechanisms and Immunotoxins
- Paleopathology and ancient diseases
- Coastal and Marine Management
Arizona State University
2017-2024
Nelson Mandela University
2017-2024
University of Colorado Boulder
2024
Institute of Arctic and Alpine Research
2024
Hebrew University of Jerusalem
1949-2023
Geological Survey of Israel
2015-2023
Faculty of 1000 (United States)
2021
University of Tübingen
1985-2010
Abstract. Stable isotope records from speleothems provide information on past climate changes, most particularly that can be used to reconstruct changes in precipitation and atmospheric circulation. These are increasingly being “out-of-sample” evaluations of isotope-enabled models. SISAL (Speleothem Isotope Synthesis Analysis) is an international working group the Past Global Changes (PAGES) project. The aims a comprehensive compilation speleothem for reconstruction model evaluation....
Abstract. Palaeoclimate information on multiple climate variables at different spatiotemporal scales is becoming increasingly important to understand environmental and societal responses change. A lack of high-quality reconstructions past hydroclimate has recently been identified as a critical research gap. Speleothems, with their precise chronologies, widespread distribution, ability record changes in local regional variability, are an ideal source such information. Here, we present new...
Abstract Highly resolved, well-dated paleoclimate records from the southern South African coast are needed to contextualize evolution of highly diverse extratropical plant communities Greater Cape Floristic Region (GCFR) and assess environmental impacts on early human hunter-gatherers. We present new speleothem stable oxygen carbon isotope ratios (δ 18 O c δ 13 C) two caves at Pinnacle Point, Africa, covering time between 330 43 ka. Composite C were constructed for Staircase Cave PP29 by...
Abstract We present new stable oxygen and carbon isotope composite records (δ 18 O, δ 13 C) of speleothems from Sandkraal Cave 1 (SK1) on the South African south coast for time interval between 104 ka (with a hiatus 48 41 ka). Statistical comparisons using kernel-based correlation analyses semblance based continuous wavelet transforms inform relationships speleothem to other proxies their changes through time. Between 105 ~70 ka, O values at SK1 are likely related rainfall seasonality....
Africa spans the hemispheres from temperate region to and has a long history of hominin evolution. Although number Quaternary palaeoclimatic records continent is increasing, much spatial temporal climatic variability still debated. Speleothems, as archives terrestrial hydroclimate variability, can help reveal this history. Here we review progress made date, with focus on first version Speleothem Isotopes Synthesis AnaLysis (SISAL) database. The geology limited development large karst regions...
Mach's idea of relativity rotation is confirmed for a shell-type model the Universe by showing that flat geometry in rotating coordinates, realising correct Coriolis and centrifugal forces, can be continuously connected through mass shell with not exactly spherical shape latitude-dependent density to an asymptotically Minkowskian outside metric. The corresponding solutions Einstein's field equations are given second order angular velocity omega but it plausible problem has solution any .
Research Article| September 01, 2017 Rainfall isotopic variability at the intersection between winter and summer rainfall regimes in coastal South Africa (Mossel Bay, Western Cape Province) K. Braun; Braun Institute of Human Origins, Arizona State University, Tempe Arizona, United States America Geological Survey Israel, Jerusalem, IsraelFreddy Nadine Herman for Earth Sciences, Hebrew University Israel Centre Coastal Palaeoscience, Nelson Mandela Port Elizabeth, e-mail: kbraun2@asu.edu...
Abstract. Stable isotope records from speleothems provide information on past climate changes, most particularly that can be used to reconstruct changes in precipitation and atmospheric circulation. These are increasingly being “out-of-sample” evaluations of isotope-enabled models. SISAL (Speleothem Isotope Synthesis Analysis) is an international working group the Past Global Changes (PAGES) project. The aims a comprehensive compilation speleothem for reconstruction model evaluation....
Abstract. Paleoclimate information on multiple climate variables at different spatiotemporal scales is increasingly important to understand environmental and societal responses change. A lack of high-quality reconstructions past hydroclimate has recently been identified as a critical research gap. Speleothems, with their precise chronologies, widespread distribution, ability record changes in local regional variability, are an ideal source such information. Here we present new version the...
Previous work on approximate solutions for rotating mass shells with flat interior is extended to third order in the angular velocity omega . It shown that condition of flatness can only be preserved this if shell exhibits differential rotation. The first-order result, a compact M=2R creates total dragging inertial frames inside shell, not invalidated by third-order corrections. By analysing structure arbitrary , it proven there exists exactly one solution interior.
Abstract Pinnacle Point (PP) near Mossel Bay in the Western Cape Province, South Africa, is known for a series of archaeological caves with important finds. Extensive excavations and studies two them (PP13B PP5-6) have documented alternating periods anthropogenic-dominated geogenic-dominated sedimentation. A variety do not bear evidence anthropogenic remains. We studied detail remnant deposits three them, Staircase Cave, Crevice PP29, which been formed under same geologic sedimentary...
Abstract Aim The geography and genesis of diversity remain an enduring topic in ecology evolution. Mediterranean Climate Ecosystems (MCEs), with their high plant diversities winter rainfall climates, pose a challenge to popular hypotheses evoking water availability temperature as necessary for the evolution diversity. We test hypothesis environmental stability driver regional‐scale floristic using speleothem oxygen (δ 18 O) carbon 13 C) isotopic values proxies past climatic variability Cape...
Diphtherial toxins exposed to alkaline reactions produced in the golden hamster, addition neurotoxic symptoms, marked disturbances heart function as indicated by electrocardiographic abnormalities. Acid-treated on other hand, did not cause any changes. The first appearance of changes frequently preceded that paralytic and when sublethal doses were administered, electrocardiogram remained abnormal even after neurological symptoms had disappeared. Electrocardiographic examination seems,...
Speleothems (cave carbonates) are widely distributed in terrestrial regions, and provide highly resolved records of past changes climate ecosystem conditions, encoded the oxygen carbon isotope proxies. The SISALv2 database, created by PAGES-SISAL  Phase 1 Working Group, provided 700 speleothem from 293 cave sites, 500 which have standardized chronologies. database access to that were hitherto unavailable original publications and/or repositories, enabled regional-to-global scale...
The South African south coast is noteworthy for its rich record of archaeological sites. Cave deposits from the region first known evidence hunter-gatherers using marine food resources ~165 ka ago. Between ~110 and 65ka also preserves worn seashells, complex stone bone tools, shell beads decorated ochre ostrich eggshell. Such tools objects may be early examples items that required accumulation dissemination knowledge over several generations culture. But our understanding environmental...
Monitoring the long-term changes in stable carbon isotope ratio of dioxide (expressed as δ13C-CO2) is a useful tool to track fate atmospheric CO2 and variations global cycle. Due small but significant change mean δ13C-CO2 approximately -0.75‰ over last three decades, robust traceable method required δ13C-CO2 globally. The Stable Isotope Lab at INSTAAR University Colorado Boulder has been partnering with NOAA’s Global Laboratory since...
unknown' entity entity_status 'current', 'current partially modified', 'superseded' depth_ref 'from top', base', 'not applicable' geology 'limestone', 'dolomite', 'marble', 'dolomite limestone', 'marly 'calcarenite', 'mixed (see notes)', 'other 'unknown' rock_age 'Holocene', 'Pleistocene', 'Pliocene', 'Miocene', 'Oligocene', 'Eocene', 'Palaeocene', 'Cretaceous', 'Jurassic', 'Triassic', 'Permian', 'Carboniferous', 'Devonian', 'Silurian', 'Ordovician', 'Cambrian', 'Precambrian',...