Geophysical Research Articles

Farmers’ Knowledge, Attitude and Experience in the Application and Management of Pesticides

A survey was conducted on some vegetable farmers from a few selected vegetable growing areas in Bangladesh to know their social aspects, pesticide knowledge, practices, safety measures, resources and effects of pesticides. A survey questionnaire was developed and sent to 90 randomly selected vegetable farmers to determine to what extent they used pesticides. Almost 87% of the farmers’ stored pesticides in their houses without safety consideration but only about 13% used special storage. About 78.7% of farmers never read the label before applying pesticides. The most protective clothes reported by the farmers were nose masks (18.2%), and about three-fourths (71.7%) of them did not use any protective clothing. The majority (61.8%) of the farmers threw away their empty containers, and only 16.9% burned them. The majority of farmers (92.1%) applied pesticides as both curative and preventive measures. Almost all farmers reported that infested pests were identified by themselves by observing damage to flowers & fruits (86.5%) and leaves & green parts (13.5%). Most of the farmers (64%) selected pesticides for controlling pests by themselves, and 28.1% with the help of experienced farmers. Nearly 45.0% of respondents have moderate knowledge, and 44.8% have good knowledge in pesticide application and management. The most common pesticide related illnesses and injuries reported by respondents were headache/dizziness (44.9%), weakness (33.7%), stomach cramps (29.2%), and blue-red vision (16.9%). Only 23.6% of farmers observed that pesticides decrease plant yield, and 18.0% of farmers knew that pesticides destroy soil microorganisms. As the environment and human health were poorly considered, only 19.1% of respondents were bio-pesticides, 4.5% were organic pesticides, 2.2% were non-persistence pesticides, and 2.2% were natural enemy users. Respondents have very poor knowledge about modern pest control methods like beneficial microorganisms (4.7%), beneficial insects (3.5%), biological control of pests (3.5%), IPM (2.3%), SIT (1.2%), and GMO crops (1.2%). Farmers’ age was correlated negatively with education (r = -0.380) and positively with experience (r = 0.909, P < 0.01). Pesticide related illness and injuries had a significant correlation with age (r = 0.465) and experience (r = 0.395). Jagannath University Journal of Life and Earth Sciences, 9(2): 111–124, 2023 (December)

Pharmacological Profile Analysis of a Vegetable Crop Pumpkin (Cucurbita maxima Linn.) Seeds

The seeds of pumpkin (Cucurbita maxima Linn.) can be utilized as both a conventional and multifunctional dietary constituent. In this study the antioxidant, antibacterial, and cytotoxic effects of various fractions such as petroleum ether soluble fraction (PESF), chloroform soluble fraction (CFSF), dichloromethane soluble fraction (DCMSF), and aqueous soluble fraction (AQF) were obtained from crude extract (CE) of the C. maxima seeds were assessed by using 1,1-Diphenyl-2- Picrylhydrazyl (DPPH) method, disc diffusion technique, and brine shrimp lethality bioassay respectively. The results showed that all the fractions have remarkable antioxidant, antibacterial, and cytotoxic activities. The study revealed that both the AQF and PESF and the CF confirmed significant antioxidant properties. The antibacterial activity of different fractions against Gram-positive and Gram-negative bacteria was examined to determine their significant effect. PESF and CFSF fractions exhibited substantial inhibitory activity against Gram-positive bacteria, particularly Bacillus cereus. Bacillus subtilis exhibited significant susceptibility to both CFSF and AQF. Salmonella typhi and Shigella dysenteriae exhibited significant susceptibility to PESF and CFSF, while Escherichia coli was the Gram-negative bacterium most effectively inhibited by CFSF. The IC50 values revealed that the DCMSF exhibited the highest inhibitory activity, followed by other fractions. The new study emphasizes the significance of pumpkin seeds in terms of their pharmacological and biological properties, which may encourage more research on the potential benefits of this plant for human health. Jagannath University Journal of Life and Earth Sciences, 9(1): 7-18, 2023 (June)

Heterogeneric Diversity and Richness of Avifauna in a Degraded Landscape of Arial Beel in Bangladesh

Bird diversity and richness reflect the habitat quality of ecosystems. The species composition, diversity, and richness of birds were studied at Shologhar Union, a degraded landscape of Arial Beel, from March 2016 to February 2017, using line transect and point count methods. A total of 75 species of birds belonging to 14 orders and 35 families were recorded; most of them were residents (83%). Non-passerine birds were predominant (40 species, 53% of total species), with 18 families and 38 genera. Only one near-threatened species (Yellow Wattled Lapwing Vanellus malabaricus) was recorded. Among resident birds, Baya weaver (Ploceus philippinus) was dominant, and the Yellow Wagtail (Motacilla flava) was predominant among migratory birds. Most species were terrestrial (51 spp., 68% of total birds), contributing only 23% of the population. The individual rarefaction revealed the highest species richness in March and the lowest in May and June. The highest population was recorded in winter (38%), and insectivore species (40%) were the highest. No significant seasonal variation occurred in the richness of birds (Kruskal-Wallis test: K = 0.05 df = 2, p = 0.971) and in different feeding guilds (Kruskal-Wallis test: K = 0.86, df = 5, p = 0.65). Ardeidae and Sturnidae represented the highest diversified families (6 species in each, RDi = 8), and Baya Weaver contributed the highest (26%) population. The presence of different species of birds suggests that this site could provide a suitable habitat for wild birds, and restoration management of this part of Arial Beel should require conserving the habitat of avifauna. Jagannath University Journal of Life and Earth Sciences, 9(1): 19-44, 2023 (June)

Yield Performance Study of Bina Developed Sesame Varieties under Agro-Ecological Conditions of Mymensingh District in Bangladesh

An investigation was done during the Kharif-I (Summer) season 2022 at Sadar Upazilla of Mymensingh district in Bangladesh to explore the yield and factors affecting the yield of four sesame varieties developed by the Bangladesh Institute of Nuclear Agriculture (BINA). Three replications of a Randomized Complete Block Design (RCBD) were used, where Binatil-1, Binatil-2, Binatil-3, and Binatil-4 were the varieties. The experiment's findings showed that Binatil-1 contained the tallest plant (107.00 cm), whereas Binatil-3 contained the shortest plant (79.55 cm). It was noted that Binatil-2 had the greatest number of plant-1 branches (4.95), whereas Binatil-1 had the least amount (2.14). Additionally, Binatil-3 displayed the highest number of plant-1 pods (95.65), whereas Binatil-1 provided the lowest amount (51.27). Binatil-1 had the largest pod (3.56 cm), whereas Binatil-4 had the smallest (2.57 cm). It was noted that Binatil-1 displayed the greatest count of seeds in pod-1 (78.15), while Binatil-4 displayed the least amount (61.12). The highest 1000 seed weight was obtained from Binatil-2 (3.15 g), whereas the lowest 1000 seed weight was recorded in Binatil-1 (2.95 g). The established genotype Binatil-2 had the maximum seed yield (1.42 t ha-1), whereas Binatil-1 had the least (1.27 t ha-1). Among the cultivars, Binatil-3 matured in the fewest days (87), whereas Binatil-2 required the most days (95). At Binatil-2, significant yield performance was found from the Kharif-I (summer) season experiment. A simple correlation was done where branches per plant per thousand seed weight had a significant positive correlation and pod breadth had a negative impact on seed yield for all genotypes. This experiment will be helpful for oil crop breeders and the farming community to choose promising sesame genotypes with high yield potential and future breeding stock. Jagannath University Journal of Life and Earth Sciences, 9(2): 125–132, 2023 (December)

Riverine Community Vulnerability to Flooding: An Insight from the Bramhaputra-Jamuna River at Harirampur Upazila, Manikganj

Bangladesh is one of the nations that has a distinctive environment for floods. Most of the land is low-lying, and 80% is a floodplain, making it highly susceptible to frequent flooding. This research aims to investigate the susceptibility of riverine communities to flooding and display the spatial distribution of vulnerability for the study region (Harirampur Upazila). A vulnerability assessment index is developed using multiple variables related to social, physical, and economic vulnerability. A quantitative survey is conducted to gather data on physical, social, and economic factors contributing to household vulnerability to floods. The results reveal that out of the five unions in Harirampur Upazila, Gopinathpur, and Lesraganj unions, they have been found to have a high vulnerability to flooding (vulnerability scores of 3.19 and 3.10, respectively). Kanchanpur Union is severely vulnerable to flooding (score 3.57). On the other hand, Gala Union is designated as a lowly vulnerable (score of 2.23) area, and Ramkrishnapur Union is classified as a moderately vulnerable (score of 2.83) area. Finally, this study would help to assign government and non-government initiatives following the vulnerability category during critical conditions of any disaster period. Jagannath University Journal of Life and Earth Sciences, 9(2): 195-214, 2023 (December)

Climate Change-Induced Livelihood Vulnerabilities in South Western Coastal Region of Bangladesh

This study focused on the impact of climate change on the livelihood of coastal people. The study used primary and secondary data to complete the study. The climatic components are changing gradually, consequently, the impact of adversity on livelihood is severe in coastal areas. This research has found the perceptions of coastal people regarding climate change and it’s devastation. Coastal people faced change-induced disasters such as cyclones, floods, tidal surges, salinity intrusion, and erosion that affected the coastal communities and their livelihoods. The study found people lost their livelihood sectors, especially agricultural activities, fish farms, fishing culture, cattle farms, business, daily working opportunities, and daily labor. However, due to the challenges during and after the disasters, they cannot easily resume their regular occupations and jobs, including agricultural activities, fishing farms, fishing and cropping businesses, daily labor, seasonal labor, and workers for fishing farms. Furthermore, the coastal people lost their property and lives, particularly settlements, agricultural land, and crops, to climate change-induced adversity. The marginal farmers and laborers are the main losers during and after disasters because they have no backup money for survival. Many of them took loans from local financial institutions and money lenders. The research will provide guidelines for the coastal community and policymakers to mitigate the impact of adversity. Jagannath University Journal of Life and Earth Sciences, 9(2): 163–178, 2023 (December)

Microbial Pollution with Antibiotic Resistant Bacteria in the Buriganga River of Dhaka, Bangladesh

Dhaka, the capital of Bangladesh, is located on the bank of the Buriganga River. Pollution of Buriganga river water with different types of waste containing antibiotic-resistant (AR) bacteria poses a threat to human health. Therefore, this study aims to analyze the physicochemical parameters, total aerobic bacterial count (TBC), total coliform count (TC), and antibiotic-resistant bacteria from waste disposal points located in the river seasonally. We collected 59 water samples from sewage waste (SW), 31 from industrial waste (IW), and 9 from hospital waste (HW) disposal sites during the wet (November to April) and dry (May to September) seasons in the Buriganga river. We found that water temperature, pH, BOD, and COD decreased, but water total dissolved solids (TDS) increased significantly in the dry season compared to the wet season. Bacteriological analysis showed that total TBC and TC were significantly increased in the dry season compared to the wet. Further analysis showed that TBC and TC from the water of SW and HW disposal sites increased in the dry season compared to the wet. However, TBC and TC from the water at IW disposal sites were not changed. These results indicate that SW and HW are the main contributors to the bacterial coliform contamination in the Buriganga River. Escherichia coli, Pseudomonas spp., Staphylococcus aureus, Streptococcus spp., and Salmonella spp. isolates showed a high prevalence of resistance against commonly used antibiotics. It can be concluded that SW and HW might spread AR bacteria in the water of the Buriganga River, which causes a significant threat to humans and the environment. Jagannath University Journal of Life and Earth Sciences, 9(2): 215-226, 2023 (December)

The Role of Maternal Psychological Well-Being as a Predictor of Children’s Internalizing Behaviors

Nowadays, mothers' psychological well-being and behavioral outcomes in children have become a major topic of interest globally in the social and clinical arena. Though fathers play an important role in parenting, mothers are the key persons responsible for caring for their children. Thus, the present study investigated the relationship between maternal psychological well-being and their children's internalizing behaviors. This study also aimed to build up some models related to predictor and outcome variables based on the current research findings. A cross-sectional survey research design was employed to conduct the study on 800 participants (400 children and 400 mothers). The children were selected from ten Bangla medium high schools in Dhaka, and the age ranges of the children ranged from 11 to 13 years. The schools and the children were selected following a multistage random sampling technique. The self-reported Bangla version of the Strengths and Difficulties Questionnaire (SDQ), the Bangla version of the General Health Questionnaire (GHQ-28), and a Personal Information Form (PIF) were administered to the participants to collect data. The correlation analysis showed a significant positive correlation between maternal psychological well-being and children's internalizing behavior. Results also revealed that somatic symptoms, anxiety and insomnia, social dysfunction, and severe depression in mothers were significantly correlated with the internalizing behavior of children. Findings from multiple regression analysis indicated that the most powerful predictor of internalizing behavior was mothers' anxiety and insomnia, which independently explained 35% of the variance. The other significant predictors were social dysfunction, severe depression, and somatic symptoms. All four predictors jointly explained 40.6% of the variance in children's internalizing behavior. The implications of the findings have been discussed in light of theory and research evidence from earlier research. Jagannath University Journal of Life and Earth Sciences, 9(1): 45–56, 2023 (June)

Diversity, equity, and inclusion in paleolimnology: insights from the 2022 IAL-IPA symposium

This report provides insights into ways that paleolimnology is becoming, and can continue to be more diverse, equitable and inclusive. Ideas presented here came during the organization, and in part, out of a special session held during the Joint Meeting of the International Association of Limnogeology (IAL) and the International Paleolimnology Association (IPA), conducted virtually (27–29 April 2022) and in-person, in Bariloche, Argentina (27 November to 1 December 2022). It was the first time in 55 years that the combined IAL-IPA meeting (held separately prior to 2018) hosted a special session to address issues beyond the value of scientific information in lake sediments. That session, “Beyond just research data: the value of outreach, education, equality, and inclusion around lakes,” included topics such as Third Mission activities, i.e., the economic and social missions of universities and how they contribute to the broader community. It also addressed challenges to diversifying our Earth Science community, which is still characterized by underrepresentation of women, especially at the highest academic levels, suffers from the “parenthood effect,” which affects both women and men, and often fails to adequately support dual-career couples, especially in Europe. Efforts to enhance diversity, equity and inclusion (DEI) included: (1) a virtual IAL-IPA meeting for Early Career Researchers (ECRs), conducted months before the in-person conference in Argentina, (2) a special session on DEI challenges and values, (3) financial support for ECRs and attendees from low-income countries, (4) equitable ECR awards, (5) consideration of gender equity during plenary and oral presentations, (6) remote presentations, including both live and pre-recorded talks, (7) utilization of multiple communication platforms to disseminate information to conference participants, and organization of science-communication activities, and (8) pre- and post-conference courses and workshops. These efforts were supported by the local organizing committee and by the establishment of the first DEI Working Group. ECRs dominated the in-person Joint Meeting (200 of 300 attendees), which we view as an opportunity to promote changes in our discipline. We encourage members of our community to work collaboratively to shape diverse research groups and identify leaders who will promote more equitable and inclusive workplaces.

PhET: AN INTERACTIVE SIMULATION TECHNOLOGY FOR LEARNING OUTCOMES BASED TEACHING-LEARNING SCIENCE

Recognizing the immense potential of Information and Communication Technology (ICT) as an essential part of the teaching-learning process for enhancing connectivity, content, capacity, and collaboration among various stakeholders, the National Education Policy 2020 advocates for education to reach individual learners through both online and offline modes of delivery. NEP-2020 further states that virtual laboratories provide equal access to quality practical and hands-on experiment-based learning experiences for all students. It also emphasizes that the teaching-learning process through games and simulations positively affects the quality of education. Traditionally, these methods have been associated with strong teachers who maintain high degrees of personal contact with learners. They can be utilized by students individually, in groups, or through virtually demonstrated experiments to conduct the required activities. In this area, PhET simulations offer dynamic access to multiple representations, making the invisible visible, scaffolding inquiry, and allowing for safe and quick access to multiple entry points while being engaging and fun for both teachers and students. PhET Interactive Simulations is an online and offline platform developed by the University of Colorado Boulder, featuring more than 159 interactive simulations (56 in Physics, 30 in Chemistry, 48 in Mathematics, 18 in Earth Science, and 7 in Biology) for teaching and learning science from elementary to higher levels. These simulations enable students to conduct experiments more flexibly and interactively using text, video, multimedia, animation, and simulations. They also aid in hands-on, activity-based skill training. This paper focuses on the application of PhET simulations in science education within the current context of digital education. It also examines the status of laboratories in India, the use of PhET simulations for science (Physics, Chemistry, and Biology), the steps involved in accessing and using PhET simulations, the importance of their design and procedures, and their implications for enhancing practical abilities, skills, and assessment.

CONCEPTUAL AND TERMINOLOGICAL APPARATUS OF LAND USE AT THE LOCAL LEVEL

It is worth considering that the conceptual and terminological apparatus is an integral part of any scientific field. However, in the context of land use at the local level, especially when considering problems that intersect geography, earth sciences, ecology, agriculture, economics, jurisprudence and other related fields, the relevance of the issue of conceptual and terminological apparatus becomes very obvious. The peculiarity of this field is that its research has a direct applied nature, which requires a deep understanding and definition of certain scientific concepts. The set of these scientific concepts constitutes the conceptual and terminological apparatus that defines the structure and language for further research in the field of land use. In our scientific study, we highlighted the main approaches to defining the category “land relations”. These approaches are primarily, as is known, based on three key terms: ownership, use and disposal of land plots. However, an important concept in our study of the field of land use is the very concept of “land”, which, together with its derivatives, such as “land relations”, “land resources”, “land management”, “land management”, “land use”, “paradigm of land management”, forms a complex conceptual and terminological apparatus, which is currently in an active process of formation. The results of our study of the essence of the conceptual and terminological apparatus related to “land relations” provide grounds for the assertion that land relations have an objective nature and are a socio-economic and ecological process of ownership, use and disposal, which determines the novelty and relevance of our research.

How big is a boulder? The importance of boulder definition choice in earth science research and river management

AbstractBoulders are globally widespread and influence processes across many landscapes including hillslopes, coasts, rivers and extra‐terrestrial settings. Boulders are described as particles, sufficiently large, that they have a disproportionate effect on the surrounding landscape. Moving beyond this conceptual definition, however, requires a somewhat arbitrary decision of how to define a minimum boulder size. The implications of boulder definition on study findings are rarely considered. We investigate the suitability of five boulder definitions, two based on fixed sizes: (1) 0.26 m and (2) 1 m, and three definitions which vary based on system characteristics: (3) grain mobility, (4) grain protrusion and (5) surface grain size distribution (> 84th percentile, D84). We consider the impact of definition on calculated boulder metrics, and, for the >1m and >D84 definitions, their association with channel and catchment characteristics across 20 boulder‐bed streams in northern Sweden. We also surveyed river managers responsible for restoring these rivers, to gain a practitioner insight on boulder size definition. We found that boulder definition matters; for metrics relating to the number or density of boulders, the >D84 and >1m size definitions were negatively correlated. Surveys indicated the importance of communicating boulder definition. We conclude that, whilst the best choice of boulder size definition will vary based on the questions of interest and techniques employed, evaluating the implications of the chosen boulder size definition and communicating the reasoning behind boulder definition choice is crucial.

Structural and non‐structural numerical blind prediction of shaking table experimental tests on fixed‐base and base‐isolated hospitals

AbstractBase‐isolated hospitals are frequently preferred to fixed‐base ones because of their improved seismic structural performance. Despite this, the question remains open on the advisability of using this modern seismic protection technology in preference to other conventional solutions, on the grounds of a holistic approach based on limiting non‐structural damage as well as continuity of service to the community in the aftermath of an earthquake. Two full‐scale four‐storey (fixed‐base) and three‐storey (base‐isolated) hospital buildings have been recently built and subjected to three‐dimensional shaking table tests at the National Research Institute for Earth Science and Disaster Prevention (Japan), with particular attention to evaluating and classifying functionality of non‐structural components and vital medical equipment. A two‐phase experimental campaign was carried out considering two earthquakes scaled at different intensity levels and applied along the horizontal and vertical directions. The current study aims to provide results of a numerical structural and non‐structural blind prediction of these hospital settings. A homemade numerical code is developed to account for lumped plasticity modelling of steel frame members and variability of the friction coefficient of spherical sliding bearings. Moreover, three non‐structural components are modelled in the fixed‐base structure: that is, elastic single degree of freedom systems representing two tanks filled with sand at the top floor; elastic beam elements for piping at the third floor; five‐element macro‐model for the in‐plane‐out‐of‐plane nonlinear response of partition walls at the first floor. The identification of predominant vibration periods of the fixed‐base structure is carried out using a homemade numerical code based on the continuous wavelet transforms in combination with the complex Morlet wavelet. Finally, the sliding and rocking motion of three items of medical equipment (i.e., incubator at third floor, dialysis machine at second floor and surgical bed at first floor) are analysed by means of a homemade numerical code, considering acceleration time histories of selected structural nodes of the fixed‐base structure.

M-learning and autonomous education: the impact of the Moroccan digital classroom project on science subject’s learning

The widespread adoption of pedagogical digitalization and its integration into teaching practices has been proposed in response to the global health crisis triggered by the COVID-19 coronavirus pandemic. This suggestion, aimed at ensuring inclusivity and equal opportunities among learners, has profoundly influenced education. In 2021, the Moroccan Minister of National Education for Preschool and Sport announced a significant step forward by launching the digital classroom project, combining distance and face-to-face learning models with digital tools to guarantee the continuity of educational systems in Moroccan institutions. The project specifically aims to strengthen the learning of science subjects (Mathematics, Life and Earth Sciences, and Physics) to secure ongoing education in the face of potential future disruptions. This digital pedagogical revolution has emerged as a highly suitable learning method for diverse social groups (such as people with disabilities and refugees) and various challenging circumstances (natural disasters, wars, pandemics…). The research outlined in this context seeks to assess the impact of combining the use of Artificial Intelligence (AI) and digital classrooms on the performance of science subjects in the Rabat Sale Kenitra region, providing insights into the evolving educational landscape.

Monash Rocks

This paper describes the development of the “Monash Rocks” app - designed to bring our landscape to life through augmented reality. We describe the highs and lows of the development process, the lessons we learned along the way, and our plans for further development of the app to showcase the Monash Earth Sciences Garden and extend the space into further innovative, immersive teaching and learning experiences. The creation of Monash University’s Earth Sciences Garden (MESG), a "living" geological map of Victoria collating nearly 500 rock specimens, gave us the perfect vehicle for an Augmented Reality (AR) experience. Students and visitors to the MESG can now use the Monash Rocks App on their phones to view a 3D display that overlays the live camera feed on the device enhancing the experience of the environment, taking it to another dimension. The value in augmenting a learning environment is in its ability to pull virtual objects into real scenes (Green & Chandler, 2014, p.549), in this case expanding the physical environment through time and space on a journey back millions of years. The rock now becomes alive, telling its story and supplying information that is missing in the “real life” walk through the garden.

The contradiction between lithospheric thermal and seismic structures reveals a nonsteady thermal state – A case study from Northeast China

The nature of the lithosphere, as the outermost layer of the solid Earth, has long been a focus of the Earth sciences. Many methods have been used to study the properties and structure of the lithosphere, including gravity, magnetism, electricity, seismic, and geothermics. Since the 1970 s, a coupled heat-flow heat-production steady-state model has been employed to study the thermal structure of the continental lithosphere and has helped researchers explain many geothermal observations. However, the steady-state model does not work well in some areas. Taking Northeast China as a case study, we systematically calculated the lithospheric thermal structure, compared the result with seismic research, and concluded that the lithospheric thermal state is nonsteady in the southern Songliao Basin, the southern Greater Xing’an Range and the Changbai Volcano. The lithosphere in southern Songliao Basin features a hot top and a cold bottom. The lithosphere in southern Greater Xing’an Range and the Changbai Volcano feature a cold top and a hot bottom. Our numerical simulation has demonstrated that the response of surface heat flow to thermal disturbance at the bottom of the lithosphere often lags by more than 20 Myr, resulting in a significant disparity between the thermal structure calculated based on surface heat flow and the velocity structure of seismic waves. In addition, this study of the thermal structure in Northeast China shows that the temperature of the Moho in Songliao Basin is very high (>600 °C), which may be an important cause of the lack of Cenozoic volcanism in the Songliao Basin.

Thank You to Our 2023 Peer Reviewers

AbstractWe are very grateful for the reviews done in 2023 to support the published articles of Perspectives of Earth and Space Sciences. Last year we had 56 reviews and this year it was 49. As a relatively young journal, Perspectives is still defining its role withing AGU. This year Perspectives added several new article formats in order to help support intra‐AGU communication. These new formats included Commentaries, Opinions, News Items, and Memorials, which means additional challenges for reviewers, as the review criteria for these new formats vary from each other. This year also saw an increase in the diversity of styles and authorships of Perspectives Articles, which are the primary format of the journal, but the bulk of these Articles still took a large‐scale big‐picture view of a particular scientific perspective, across the full range of Earth and space sciences. Once again this year, we are very grateful for the wisdom and flexibility shown by our reviewers, and the entire editorial board of Perspectives would like to express our deep appreciation for all the work they have done. Thank you!

Unusual diagenesis of Cambrian chancelloriids from Greenland and Siberia

Phosphatized sclerites of Chancelloria and Allonnia are described from the Henson Gletscher Formation (Cambrian, Miaolingian Series, Wuliuan Stage) of North Greenland and the lower Cambrian of Siberia. They preserve diagenetic, unusually large, elongate crystals within the internal cavity (lumen) that maintain the imbricate lamellar structure of the original microstructure of the aragonitic sclerite wall. John S. Peel [john.peel@pal.uu.se], Department of Earth Sciences (Palaeobiology), Uppsala University, Villavägen 16, SE-75236, Uppsala, Sweden; Artem Kouchinsky [artem.kouchinsky@gmail.com], Department of Paleobiology, Swedish Museum of Natural History, Box 50007, SE-10405, Stockholm, Sweden.

MINING PENCILS, SCULPTING GRAPHITE: THE SIBERIAN EXPEDITION OF J.-P. ALIBERT (1844–1857) AND THE EVOLVING 19TH CENTURY EUROPEAN VISUAL AND MATERIAL CULTURE RELATED TO EARTH SCIENCES

ABSTRACT This article explores, through a case study of Jean–Pierre Alibert's (1820–1905) expedition in Siberia (1844–1857), the relationship established between Earth sciences, mining, and visual arts during the second half of the 19th century. Alibert was a French businessman who discovered an important deposit of graphite in Siberia. He then built a mine to exploit this material which was in high demand to produce pencils. When Alibert returned to Europe in 1857, he created an album of gouaches to commemorate his expedition, and he offered some sculptures composed of graphite and nephrite jade to important scientific institutions in Paris as trophies of the expedition. While a few written sources are available, I will directly question these visual and material sources to situate this case study within the context of its time, and of Earth sciences’ progress and technical achievements, to shed light on the phenomena that characterized the quest for a renewed scientific visual language related to Earth sciences.

Development of non-destructive isotope measurement of the natural galena (PbS) using negative muon beams

In Earth and planetary science, Pb isotopic composition is well known to play a key role in deciphering the origin and evolution of materials because they provide unique chronological and/or indigenous regional information as a radiogenic daughter nuclide from U and Th. To determine such an isotopic composition, mass spectrometers have been widely used over several decades, which requires a destructive/consuming treatment such as sputtering, laser ablation and thermal ionization. Here, we first report the non-destructive Pb isotopic measurement of natural galena (PbS) using the energy shift of muon-induced characteristic X-rays. The observed Pb isotopic composition of the natural galena is in good agreement with that obtained by conventional mass spectrometry. Such a muon-based Pb isotopic analysis method is expected to be applied to identify the production area of archaeological artefacts (e.g. bronze products), where non-destructive analysis is highly desirable compared to conventional mass spectrometry.