Teaching Climate Literacy Using Geospatial Tools

Antarctica is the world’s coldest, driest and windiest continent. It is a harsh environment that few people will ever see but it is a very important part of our Earth system. Over the past 34 million years the climate in Antarctica has deteriorated from one that supported lush vegetation to the conditions observed today. By studying this trend and the associated changes to ice and vegetation we can gain critical insight into climate changes taking place today. This thesis presents three pieces of curricula that will help students and the general public understand some of the research currently underway in Antarctica while introducing them to geospatial tools that can be used to study climate and other large spatial and temporal events. The first paper guides students through an investigation of changing palynological distributions over time. In the activities described, students will use these data to infer climatic change on different geologic time scales and in different locales. Students will use published data-sets to trace changes in plant assembly over the past 34 million years on the Antarctic Peninsula as well as to understand the demise of the North American Ice Sheet during the last 20,000 years. The activity also introduces the use of GeoMapApp mapping software for the preparation of geo-spatial imagery and data processing. In the second paper, I outline a forensics activity that is based on actual cases where pollen has been used to solve crimes. This paper outlines a method to geo-locate a crime scene by combining Google Earth and data from NOAA’s paleo-climate website. Here the focus is on spatial, rather than temporal, changes in climate and flora. Finally, I present an activity that uses GeoMapApp and multi-beam sonar data from the Ross Sea to find and map megascale glacial lineations which can then be used to infer paleo-ice stream locations and grounding zone wedges that were laid down during the last glacial maximum

Dendroarchaeology applied to the Portuguese cultural heritage between the XV and XIX enturies: paintings and musical instruments as witnesses of artwork and wood trades between Portugal and Europe

Doutoramento em Engenharia Florestal e dos Recursos Naturais / Instituto Superior de Agronomia. Universidade de LisboaThe current study focuses on the dendrochronological dating of seventy Portuguese and foreign artworks from the XV to the XIX centuries from public and private collections. Among the artworks examined are a collection of 34 Portuguese and Flemish paintings, as well as 36 musical instruments of Portuguese and foreign construction. The study investigates the wood's provenance within the historical context of Portuguese maritime commerce with Europe. This research aims to develop a reference chronology, which will be useful for future dendrochronological studies, with a focus on artworks on Baltic oak wood support. The adopted methodology took into consideration the impossibility of obtaining samples from artworks and musical instruments, as well as the restrictions to their handling. Therefore, the dendrochronological analysis was based on direct observation using photographic and video material adapted to the size and shape of each piece, followed by statistical processing by ARSTAN, COFECHA, TRiCYCLE, and TSAPWIN software. The dating of each piece and the study of the dendroprovenance used public and restricted access reference chronology databases. The results obtained from the study of the support of Portuguese and Flemish paintings reinforce their chronological attributions and confirm the use of Baltic oak. The dendrochronological data obtained from these pieces, in conjunction with data provided by the IJF-DGPC and research projects conducted by the CEF-ISA, enabled the construction of a reference chronology spanning between the years 1149 to 1599. The pioneering dendrochronological study on Portuguese violins, cellos, and pianofortes from the XVIII and XIX centuries corroborates the historical dates inscribed on the respective musical instruments. It also revealed that the Portuguese workshops used woods from the Alpine region of Switzerland, Germany, Austria, and Italy, which is consistent with the several historical sources on the Portuguese maritime trade with Europe. In conclusion, dendrochronology based on artworks enabled the construction of historical knowledge, as well as the interpretation of paintings and musical instruments as evidence of goods traded between Portugal and Europe between the XV and XIX centuries.N/

Stratigraphy, Sedimentology and Reservoir Modeling of the Late Devonian Berea Sandstone/Siltstone in northeastern Kentucky and southeastern Ohio

The Berea Sandstone is a Late Devonian unit that interfingers with and overlies the Bedford Shale. In the study area, the Bedford-Berea sequence averages 120 feet thick based on geophysical logs. The Bedford Shale makes up roughly 45 feet of the interval and the Berea Sandstone makes up the remaining 75 feet. Horizontal drilling and hydraulic fracturing have caused the Berea to become one of the largest oil producing formations in Kentucky to date. Depositional models proposed for the Bedford-Berea sequence fail to explain the vertical successions of sedimentary structures observed in outcrop and thickness patterns within the subsurface. Thus, an integrated outcrop and subsurface analysis of the Bedford-Berea sequence was conducted using 22 outcrops and 148 gamma ray/density logs in northeastern Kentucky and southeastern Ohio. Recent research into extrabasinal turbidites (hyperpycnites) has shown that similar vertical successions of sedimentary structures were produced by fluctuating flows. These vertical successions of sedimentary structures are observed in the Bedford-Berea sequence in outcrop and suggest hyperpycnal influence. Thus, the Bedford-Berea sequence represents wave influenced hyperpycnal and tempestites deposits, which were deposited in a prodelta to distal delta front setting where sediment was being derived from a northern fluvial/deltaic source. A better understanding of sediment dispersal, depositional conditions, and facies will help the oil and gas industry create more accurate reservoir maps within the study area. Furthermore, the presence of hyperpycnal facies within the Bedford-Berea sequence may explain sedimentary structures within other shallow marine deposits in southern Ohio and northeastern Kentuck

Anatomical Markers for Elevated Cognition in Dinosaurs

Much research has been conducted on brain evolution within Dinosauria. Dinosaurs were originally believed to be incapable of any advanced cognitive abilities beyond the level observed in modern reptiles. This is likely true for many dinosaurs, but recent discoveries suggest that the non-avian maniraptor dinosaurs shared many physical characteristics with their bird descendants, including body feathers and neural adaptations for flight. By studying cranial endocasts (the braincase of fossilized skulls) using computed tomography (CT), paleontologists are beginning to understand the neural changes that took place across the dinosaur-bird transition. Most of these studies are focused on the development of flight, but some modern birds display signs of cognitive behaviors that rival non-human primates. These include, but are not limited to, social cognition and learning, problem solving, and tool use. This study is focused on the variation in endocast shape among 13 species of modern birds across 10 orders. The goal is to establish patterns in the endocast shape associated with the bird’s level of social cognition and overall behavioral complexity. The specimens were obtained from a wildlife nursery, representing birds that died during the southern migration in autumn 2015. Their heads were CT scanned at Ohio University in Dr. Larry Witmer’s lab, and a statistical method called geometric morphometrics was used to analyze the changes in shape around the forebrain. Qualitative analysis suggests that non-avian maniraptor endocasts resemble the endocasts of water fowl, as opposed to birds of prey or corvids. These patterns may be applicable to non-avian maniraptors

Hacking Antarctica

Hacking Antarctica is an investigation focused on rendering aesthetic responses to Antarctica beyond normative representations of the sublime and the imperceptible. It is based on fieldwork in polar and subpolar areas over the last 9 years. At its core, the research uses Immanuel Kant’s Critique of Judgement as a way of understanding what is meant by the sublime and from that develops a practice that examines what a Kantian lack of access to nature implies. This key Kantian concept is explained and devised into art works and then tested through concepts such as translation, transduction, infection and representation, using hacking methodologies informed by bricolage (L ´ evi-Strauss 1968), and diffraction (Barad 2007). The research expands on the taxonomies of the polar to reconsider the Antarctic as a border and periphery, bringing a conjunction of hacking methods and site-specific art that enables a performative causality with which to study the production of site. In other words, a performative approach as Barad and other feminist writers recognize, is questioning the traditional causality of ends and means and observer and observed and rather focuses on processes within discursive practices. Causality is reworked as a local externalization of the intra-acting relations of matter. Within the overall system of research for Antarctica, technical methods used included; Free Libre Open Source software and hardware techniques, black and white and infrared photography, ultraviolet light sensing, sound recordings, hydrophone recordings, very low frequency recordings, AM radio sensing, error in photography (light leakage, displaced focus), in text (cut-up compositions), in video (glitch) and error in bodies as infections; bio-sensing agents (including yeast and lactobacillus), point-array analysis, translation of images to raw data, and from raw data to sound, land art performances, spatialization of sound, stereo panning, quadraphonic sound, interactive embroidery, radio broadcast and installations. Specific outputs include: Antarctica 1961-1986 (2017), an interactive embroidered map of Antarctica showing sites of mineral sources and mineral pollution. The map was installed as an interactive instrument that allowed visitors to participate in the live shaping of the spatialization of sounds recorded in Antarctica. A digital Theremin sensor attached to the map was interfaced with Pure Data software running on a GNU-Linux Debian station. All software was made visible as well as the papers documenting the traces of the plutonium found there. The research through an experimental set of hacking practices supported the hypothesis that Antarctica can be represented outside the sublime through the polar-site produced by hashes of proxies and the diffraction produced when superposing modes of knowing. The interruption of the spectacle to respond to Antarctica is the result

No systematic effects of sampling direction on climate-growth relationships in a large-scale, multi-species tree-ring data set

Ring-width series are important for diverse fields of research such as the study of past climate, forest ecology, forest genetics, and the determination of origin (dendro-provenancing) or dating of archaeological objects. Recent research suggests diverging climate-growth relationships in tree-rings due to the cardinal direction of extracting the tree cores (i.e. direction-specific effect). This presents an understudied source of bias that potentially affects many data sets in tree-ring research. In this study, we investigated possible direction-specific growth variability based on an international (10 countries), multi-species (8 species) tree-ring width network encompassing 22 sites. To estimate the effect of direction-specific growth variability on climate-growth relationships, we applied a combination of three methods: An analysis of signal strength differences, a Principal Component Gradient Analysis and a test on the direction-specific differences in correlations between indexed ring-widths series and climate variables. We found no evidence for systematic direction-specific effects on tree radial growth variability in high-pass filtered ring-width series. In addition, direction-specific growth showed only marginal effects on climate-growth correlations. These findings therefore indicate that there is no consistent bias caused by coring direction in data sets used for diverse dendrochronological applications on relatively mesic sites within forests in flat terrain, as were studied here. However, in extremely dry, warm or cold environments, or on steep slopes, and for different life-forms such as shrubs, further research is advisable.</p

Using Geographical Information Systems to Investigate Spatial Patterns in Fossils of Tapirus polkenis from the Gray Fossil Site, Washington County, Tennessee

Discovered in 2000, the Gray Fossil Site provides a snapshot of the flora and fauna that lived during late Miocene to early Pliocene time in eastern Tennessee. These fossils occur in sediments consisting of fine-grained clays and sands of lacustrine origin, which were deposited after multiple sinkholes formed in the underlying Knox Group basement carbonates. Three-dimensional nearest neighbor analysis has been applied to fossils of Tapirus polkensis, characterizing the spatial patterns exhibited. These analyses determined the importance of taphonomic and depositional processes that occurred during the sites formation. Six characteristics were analyzed, four at the bone level including carnivore utilization, weathering, abrasion, and arthritis, and two at the specimen level, articulation and age class. Weathering, arthritis, and articulation, show clustered patterns indicating that the site had active predators, it consisted of many microenvironments, and deposition occurred in a passive setting. Although the current state of excavation makes any spatial analyses and taphonomic interpretations difficult, spatial analysis in both dimensions can be accomplished

Making of dendroclimatological knowledge: a symmetrical account of trust and scepticism in science

This thesis presents an empirical study of dendroclimatology, with the purpose of contributing to a wider understanding of the way scientists generate knowledge about climate change. Dendroclimatology is a science that produces knowledge about past climates from the analysis of tree growth. For two years, I have studied the work of a group of dendroclimatologists, joining them on fieldwork and sampling expeditions in the Scottish Highlands, observing how they generate data from tree samples to reconstruct past temperatures in Scotland and examining how they have mobilised a Scottish temperature reconstruction in a scientific debate over historical changes in climate. This thesis develops two parallel narratives about the practice of making dendroclimatological knowledge and the roles of trust and scepticism in this process. In describing how dendroclimatologists work to extract information about past climates from trees, I identify the importance of trust relationships and scepticism at each stage of their work. I conduct a symmetrical analysis of both trust and scepticism in science. In the past, scholars studying science have emphasised the critical role of either trust or scepticism in the construction of scientific knowledge, and have paid relatively little attention to examining the relationship between the two. In my study, I demonstrate that scepticism is part of the ordinary practice of dendroclimatology, and that scepticism in normal science (which I call “civil scepticism”) is fundamentally dependent (or “parasitic”) on existing trust relationships established through a variety of means. Dendroclimatologists engage in intimate interactions and mutual scrutiny of each other’s competence throughout the work they do in the field and in the laboratory, and they build upon and expand these trust relationships to create and defend climate reconstructions. I show that dendroclimatologists sustain trust relationships in part by demonstrating that they are competent sceptics (which I call “sceptical display”) and, in part by provisionally suspending their scepticism to permit agreement on what constitutes valid dendroclimatological knowledge. I also analyse how these internal practices of scepticism and agreement are influenced by sceptical challenges from actors external to the dendroclimatology community, including challenges grounded in similar trust relationships (a further instance of civil scepticism) and challenges that are not (which I call “uncivil scepticism”). I conclude that dendroclimatological knowledge is only possible as a result of contingent social negotiations over the distribution of trust and the boundaries of a trusting community

Biogeography and Evolution of the Araneae: A Synthetic Approach

Various methods are used to study the evolution and biogeography of the Araneae through time. Two new fossil spider species were described from Miocene Dominican amber and French Cretaceous amber. A preliminary biogeographic analysis was performed on the former in order to elucidate the biogeographic origins of the genus to which it belongs. Further, ecological niche modeling, a biogeographic technique used to delineate the set of tolerances and limits in multidimensional space that define where a species is potentially able to maintain populations, was undertaken on the brown recluse (Loxosceles reclusa) spider for extant distributions and potential future distributions given climate change. A methodological analysis addressing how error within species occurrence points influences model quality within ecological niche modeling was conducted. Results indicated that studies of lower spatial resolution are valid, if enough data are utilized; this has implications for using ecological niche modeling in the fossil record

Safe and Sound: Proceedings of the 27th Annual International Conference on Auditory Display

Complete proceedings of the 27th International Conference on Auditory Display (ICAD2022), June 24-27. Online virtual conference