Atmospheric Sciences Research Articles

Semi-analytical solutions of shallow water waves with idealised bottom topographies

Analysing two-dimensional shallow water equations with idealised bottom topographies have many applications in the atmospheric and oceanic sciences; however, restrictive flow pattern assumptions have been made to achieve explicit solutions. This work employs the Adomian decomposition method (ADM) to develop semi-analytical formulations of these problems that preserve the direct correlation of the physical parameters while capturing the nonlinear phenomenon. Furthermore, we exploit these techniques as reverse engineering mechanisms to develop key connections between some prevalent ansatz formulations in the open literature as well as derive new families of exact solutions describing geostrophic inertial oscillations and anticyclonic vortices with finite escape times. Our semi-analytical evaluations show the promise of this approach in terms of providing robust approximations against several oceanic variations and bottom topographies while also preserving the direct correlation between the physical parameters such as the Froude number, the bottom topography, the Coriolis parameter, as well as the flow and free surface behaviours. Our numerical validations provide additional confirmations of this approach while also illustrating that ADM can also be used to provide insight and deduce novel solutions that have not been explored, which can be used to characterise various types of geophysical flows.

Kungurian (Cisuralian/Early Permian) brachiopods from the Snapper Point Formation, southern Sydney Basin, southeastern Australia

Elements of a high-latitude (∼60–70°S) and low-diversity early Kungurian (Cisuralian/Early Permian) brachiopod fauna have been sporadically reported from the sandstone-dominated Snapper Point Formation (SPF) in the southern Sydney Basin of southeastern Australia for more than a half-century, but a detailed description of this fauna is not yet available. In this paper we describe 12 brachiopod species and an indeterminate ingelarellid from the SPF, including one new species (Tasmanospirifer jervisbayensis sp. nov. Waterhouse & Lee). Though this brachiopod fauna is evidently associated with an interglacial stratigraphic interval, its taxonomic characteristics overall resemble those from stratigraphically bounding glacial intervals. This association is interpreted to indicate persistence and the strong endemic nature of the Permian Eastern Australian biogeographic province in high-latitude eastern Gondwana, regardless of glacial/interglacial climate states during the Cisuralian. Biostratigraphically, the SPF brachiopod fauna is divisible into two distinctive stratigraphic assemblages: the Notospirifer cf. triplicata–Simplicisulcus sp. Assemblage in the lower part of the formation and the Johndearia brevis–Sulciplica transversa Assemblage in the upper part, each distinguished by a set of unique species. Sangmin Lee [sangminlee76@gmail.com] and G. R. Shi [guang@uow.edu.au] School of Earth, Atmospheric and Life Sciences, University of Wollongong Faculty of Science Medicine and Health, Northfields Avenue, Wollongong, NSW 2522, Australia Bruce Runnegar [runnegar@ucla.edu] Earth, Planetary and Space Sciences, University of California, Los Angeles, Los Angeles, CA 90095-1567, USA J. B. Waterhouse [permia@xtra.co.nz] Oamaru, Oamaru, New Zealand.

Atmospheric Sciences Bachelor’s Degree Recipients: Trends, Early Career Earnings, and Student Debt, 2015–19

Abstract Data on the number and economic status of bachelor’s degree recipients are harder to access for the atmospheric sciences than for other similar fields. The U.S. Department of Education’s College Scorecard provides a new, comprehensive, and annually updated way to obtain these data. Five years of College Scorecard data are analyzed, revealing that from 2015 to 2019 the number of bachelor’s recipients in the United States was at least 700 annually, with a downward trend of about 13% over the period. Institution-specific data allow for a ranking of undergraduate programs by number of bachelor’s recipients that has been impossible to compile since the demise of the American Meteorological Society (AMS)–University Corporation for Atmospheric Research (UCAR) Curricula publication in the mid-2000s. Early career earnings data for federally aided students from larger programs compiled in the College Scorecard indicate that median first-year annual salaries by the end of the 2010s averaged about $35,000, with an increase to $45,000 by the third year. Median debt at graduation during the same period averaged slightly less than $25,000. In the future, College Scorecard data could be used to provide regular updates on atmospheric sciences students, graduates, and early career professionals at all degree levels. The AMS should partner with the American Institute of Physics’ Statistical Research Center to create and disseminate such reports.

Corrigendum to “Implications of Implementing Promulgated and Prospective Emission Regulations on Air Quality and Health in India during 2030” [Aerosol Air Qual. Res. 22, 220112

Original article available at https://doi.org/10.4209/aaqr.220112 The original version of this article contained an error in Affiliation 2, which was incorrectly given as ‘Development of Atmospheric and Space Sciences, Savitribai Phule Pune University, Pune, India’. The correct affiliation is listed below: Department of Atmospheric and Space Sciences, Savitribai Phule Pune University, Pune, India The original article has been corrected.

On-Orbit Performance of Pd/4H-SiC Schottky UV Detectors in a Low-Earth Orbit

The monitoring of solar ultraviolet radiation from a space platform is now considered essential for a wide range of fieldsincluding solar physics, atmospheric science and astrobiology. 4H-Silicon Carbide (4H-SiC) is a superior alternative toconventional materials like silicon for the fabrication of UV detectors for adverse space conditions due to its inherentradiation hardness and visible-blind nature. This paper describes the space qualification and deployment of indigenouslydeveloped Pd/4H-SiC Schottky UV detectors in a low-earth orbit (LEO) and their on-board performance. Two SiC UVdetectors were flown as a rad-hard sun detection sensor in the nanosatellite INS-2TD. The sensor has carried out solar UVflux observations continuously since its launch in February 2022 and the data gathered during the first seven months offlight is discussed in this paper.

Research trend the in meteorology and atmospheric sciences category based on essential science indicators during 2011–2021

This study analyzed 1,636 top papers in the subject category of meteorology and atmospheric sciences about eleven years from 2011 to 2021, which included 1,636 highly cited papers and 24 hot papers in the field belonged to 20 Web of Science categories and 14 research areas. All top papers, written in English, were from 13,878 authors, 2,913 organizations, and 124 countries or territories, and published in 72 journals in the field. The top five journals are the Nature Climate Change (15.9% of the studied paper), Atmospheric Chemistry and Physics (12.1%), Journal of Climate (7.0%), Bulletin of the American Meteorological Society (6.7%), and Journal of Geophysical Research Atmospheres (4.6%), each published more than 76 papers. Top five countries were the USA, England, PR China, Germany, and France. Furthermore, top five organizations of National Oceanic and Atmospheric Administration (NOAA), National Center for Atmospheric Research (NCAR), National Aeronautics and Space Administration (NASA), Chinese Academy of Sciences, and University Colorado were popular based on contribution of articles more than 134 papers each. All keywords were separated into eight clusters for different research topic. Visualizations offer exploratory information on the current state in a scientific field or discipline, as well as can indicate possible developments in the future.

Student Space Missions—Facilitating Pathways to Success for Next Generation Professionals in Space

The Undergraduate Student Instrumentation Project (USIP) was a NASA program created to engage undergraduates in rigorous scientific research for the purpose of developing the next generation of professionals in space research. It is now run by the University of Houston using local resources. The development of next generation space professionals is addressed by using inquiry- based learning. Students are guided through the process of selecting a question of interest to them from disciplines such as heliophysics; atmospheric physics, chemistry, and biology; and geoscience. The students are then guided through the process of developing an experimental investigation to address their question. This student-led project is executed by the students from initial ideation of research objectives to the design, testing, and deployment of scientific payloads. The 5E Instructional model places the student at the center of knowledge building, while instructors facilitate interaction with content and guide the inquiry process. The project is designed to integrate engineering, technology, physics, material science, and earth and atmospheric sciences as an important opportunity for the students to gain access to cross-disciplinary experiential research. In addition to classroom engagement, the students build their own payloads and ground instruments. This project increases students’ command of essential skills such as teamwork, problem solving, communication, innovation, and leadership. For the students, this formative experience continues to encourage the development of a broader range of technical skills than is typically offered within an undergraduate degree. These skills include project management, systems engineering, balloon payload design, and balloon flight operations. More specifically, we teach sensor and instrument design, avionics, circuit, and power systems design, payload mechanical and thermal design, and telemetry and navigation. The students are also taught to prepare and present standard NASA project review materials, such as Preliminary Design Review, Critical Design Review and Mission Readiness Review presentations. Furthermore, the time and energy that students commit to this project promotes professional responsibility and emphasizes the necessity of coherent teamwork. Not only do students make connections with each other during this process, but also to the broader space science community. They often work with professionals from outside of the USIP structure, and regularly attend and present at conferences and student competitions throughout the project. Student projects included subjects ranging from atmospheric trace gas chemistry, ground penetrating radar and thermal infrared imaging coupled with multiwavelength LiDAR study of surface topography and chemistry, auroral electron precipitation, quantitative multi-wave- length airglow studies, search for stratospheric microplastics, monitoring auroral radio emissions, and stratospheric conductivity. This program is a for-credit course of two to three years duration.

Advice to Future Participants From Six Cohorts of an Undergraduate Summer Research Program in Atmospheric Science

Advice to Future Participants From Six Cohorts of an Undergraduate Summer Research Program in Atmospheric Science

A Tribute to Paul Crutzen (1933–2021): The Pioneering Atmospheric Chemist Who Provided New Insight into the Concept of Climate Change

Abstract Paul Crutzen received his doctorate in meteorology from the University of Stockholm in 1968 and was awarded the Nobel Prize in Chemistry in 1995. In addition to chemistry and atmospheric science, however, the breadth of his accomplishments has also been recognized by biologists, Earth system scientists, and geologists. This tribute provides some insight into Crutzen’s career and how it contributed to so many scientific disciplines. In addition, we offer a road map showing how these diverse contributions were woven together over the course of more than five decades of research. The citation for the 1995 Nobel Prize reads that it was given for “work in atmospheric chemistry, particularly concerning the formation and decomposition of ozone.” The inclusion of the wording “formation … of ozone” applies only to him among the three laureates (Crutzen, Mario Molina, and F. Sherwood Rowland). His research on tropospheric chemistry led to seminal studies of tropical biomass burning, which eventually evolved into the concept later known as “nuclear winter,” a topic in the forefront of far-ranging popular discussions in the 1980s. Last, Crutzen’s proposal for the emergence of the “Anthropocene” as a new geological epoch that would terminate the 11,700-yr-old Holocene is considered by the Earth system science community to be the most pronounced trademark of his remarkable career. Crutzen also received American Meteorological Society’s Battan Award for his coauthorship of Atmosphere, Climate, and Change, recognized by the organization as the best book for general audiences. In the later years of his career, as a member of the Pontifical Academy of Sciences, Crutzen was a key player in the formulation of Laudato Si’, Pope Francis’s encyclical on climate change, which was released in advance of the Conference of Parties (COP 21) meeting that announced the formulation of the Paris Climate Accords in 2015.

Real-time TEM observations of ice formation in graphene liquid cell.

The study of ice nucleation and growth at the nanoscale is of utmost importance in geological and atmospheric sciences. However, existing transmission electron microscopy (TEM) approaches have been unsuccessful in imaging ice formation directly. Herein, we demonstrate how radical scavengers - such as TiO2 - encased with water in graphene liquid cells (GLCs) facilitate the observation of ice nucleation phenomena at low temperatures. Atomic-resolution imaging reveals the nucleation and growth of cubic ice-phase crystals at close proximity to TiO2-water nanointerfaces at low temperatures. Interestingly, both heterogeneously and homogeneously nucleated ice crystals exhibited this cubic phase. Ice crystal nuclei were observed to be more stable at the TiO2-water nanointerface, as compared with crystals in the bulk liquid (homogeneous nucleation), suggesting the radical scavenging efficacy of TiO2 nanoparticles mitigating the electron beam by-products. The present work demonstrates that the use of radical scavengers in GLC TEM shows great promise towards unveiling the nanoscale pathways for ice nucleation and growth dynamic events.

When a Dust Storm Is Not a Dust Storm: Reliability of Dust Records From the Storm Events Database and Implications for Geohealth Applications

Windblown dust impacts human health, air quality, and climate. The National Weather Service Storm Events Database (SED) is a widely used dataset of significant or unusual weather, including dust storms (DS), and resulting deaths, injuries, and material losses in the USA. The SED is frequently used by medical, social, and atmospheric scientists. However, it is uncertain whether this dataset reliably represents spatial and temporal variations and trends of DS. Analyzing the SED from 2000 to 2020 identified 1,167 DS reports; removing reports of the same event from multiple locations left 647 DS in 21 USA states. The number of DS ranged from 12 in 2008 to 53 in 2018, with no strong interannual trends detected (R 2 was 0.3). By examining the DS events reported in the SED based on meteorological observations including wind speed, visibility, and weather codes, we determined that the SED was not only missing many DS (visibility <1km), but also included many blowing dust (BLDU) events. 49.9% of 491 reported DS events in SED had visibility >1km and were incorrectly reported as DS. Underrepresentation of DS and inclusion of BLDU may be partially due to the diverse sources contributing to the SED and a lack of verification of the reports and their consistency. Although the SED is an extremely useful and valuable database of impactful weather, including DS, the issues found in this study warrant caution in use of this dataset for many geohealth applications.

Black Women in Ocean Science: Barriers to Advancement and Strategies to Move Forward

Less than 2% of graduate students and 1% of tenured faculty in Earth, atmospheric, and ocean sciences identify as Black or African-American. Discussions about diversifying ocean sciences are incomplete without acknowledging the distinctive challenges faced by Black women. We present new survey data on the dominant barriers to entry within the field, which can result from racism and discrimination, financial difficulties, and lack of accessibility. We also discuss mitigation strategies that can be employed, with the hope that the entire ocean science community can collaborate to foster a culture of inclusion. We cannot have a healthy ocean if we do not support everyone who wants to study it.

The ASLO Multicultural Program Pioneers Diversity Efforts in the Aquatic Sciences

The Association for the Sciences of Limnology and Oceanography Multicultural Program (ASLOMP) began in 1990 as an effort to diversify participation in the aquatic sciences, with particular emphasis on increasing the number of BIPOC (Black, Indigenous, and people of color) in the field (Cuker, 2001, 2005, 2007). It was evident to anyone attending an ASLO meeting, or that of any other aquatic scientific society in the 1980s that BIPOC were essentially absent. The ranks of related academicians, agency workers, and students mirrored that absence of diversity. This was consistent with data gathered by the National Science Foundation (NSF) indicating that only 3% of doctorates earned in 1990 in the Earth, atmospheric, and ocean sciences were earned by underrepresented minorities (NSF, 1994). Acting on this information, the ASLO leadership constructed a program that would bring diverse students interested in the aquatic sciences to its annual meetings for special programming aimed at recruiting and retaining BIPOC in the aquatic and allied sciences and applied to NSF for funding.

Conformational diversity and environmental implications of trans-2-pentenal.

This study investigates the conformational intricacies of trans-2-pentenal (trans-2PA), a significant biogenic volatile organic compound. To unveil its potential implications in atmospheric chemistry and environmental pollution, we employ advanced infrared resonant vacuum ultraviolet mass-analysed threshold ionisation spectroscopy. Through this method, we identify the major conformers within trans-2PA, encompassing trans-s-trans (tt-) and trans-s-cis (tc-) structures with planar (cis) and non-planar (gauche) configurations introduced by a methyl group. In a pioneering spectroscopic examination, we analyze trans-2PA in both the neutral and cationic states. This approach allows us to gain a comprehensive understanding of its molecular behavior. Our conformer-specific vibrational spectra not only reveal the relative populations of the main conformers, notably tt-cis and tt-gauche conformers, but also shed light on atmospheric oxidation processes and lower tropospheric organic aerosol formation mechanisms. Our findings expand the understanding of the role of trans-2PA in environmental and biological contexts. Additionally, they contribute to a broader understanding of its influence on air quality, climate, and atmospheric dynamics. The collaboration between advanced experimental techniques and computational methods fortifies the scientific underpinning of this study, opening doors to further exploration in the realms of atmospheric chemistry and environmental science.

Optical trapping and light scattering in atmospheric aerosol science.

Aerosol particles are ubiquitous in the atmosphere, and currently contribute a large uncertainty to climate models. Part of the endeavour to reduce this uncertainty takes the form of improving our understanding of aerosol at the microphysical level, thus enabling chemical and physical processes to be more accurately represented in larger scale models. In addition to modeling efforts, there is a need to develop new instruments and methodologies to interrogate the physicochemical properties of aerosol. This perspective presents the development, theory, and application of optical trapping, a powerful tool for single particle investigations of aerosol. After providing an overview of the role of aerosol in Earth's atmosphere and the microphysics of these particles, we present a brief history of optical trapping and a more detailed look at its application to aerosol particles. We also compare optical trapping to other single particle techniques. Understanding the interaction of light with single particles is essential for interpreting experimental measurements. In the final part of this perspective, we provide the relevant formalism for understanding both elastic and inelastic light scattering for single particles. The developments discussed here go beyond Mie theory and include both how particle and beam shape affect spectra. Throughout the entirety of this work, we highlight numerous references and examples, mostly from the last decade, of the application of optical trapping to systems that are relevant to the atmospheric aerosol.

A Road Map to Success of International Field Campaigns in Atmospheric and Oceanic Sciences

Abstract Understanding and predicting Earth’s environment requires information and ­knowledge of detailed physical, chemical, and biological processes directly from observations. Well-organized and properly conducted field campaigns are powerful ways to make such observations. Major international field campaigns with participation from multiple countries bring together expertise and resources to address complex scientific issues that are difficult or impossible to be tackled by a few scientists in a single nation. This article describes the essential elements of international field campaigns, the necessary steps of planning and execution that need to be taken for their success, and other considerations that make international field campaigns successful. The ­intention of this article is to encourage early career professionals to participate in and learn to organize field campaigns in this exciting time of rapidly evolving technological observing capabilities and increasing efforts to seek global diversity, equity, and inclusion in science.

Unpacking Diversity: A Grassroots Initiative and its Institutional Evolution

Here we describe the evolution of a grassroots, graduate student-led initiative, Unpacking Diversity, designed to address the experiences of marginalized BIPOC (Black, Indigenous, and People of Color) scholars in an atmospheric, Earth, and ocean sciences college. Our main activity involved an annual seminar series delivered in partnership with social scientists and humanities scholars to meet the cultural needs of our college. Through this initiative, we held conversations regarding social justice in academia and offered resources to address these issues within the college. Despite high attendance and community-driven efforts to foster inclusivity, a lack of institutional support weakened Unpacking Diversity’s longevity, and organizing efforts became unsustainable for graduate students, primarily women of color. After four years, we decided to retire the initiative. We discuss the factors that contributed to the initiative's success, the obstacles that hindered substantial institutional change, and how this experience helped us create a resilient network of peers

Spectroscopic Time-series Performance of JWST/NIRSpec from Commissioning Observations

We report on James Webb Space Telescope (JWST) commissioning observations of the transiting exoplanet HAT-P-14 b, obtained using the Bright Object Time Series (BOTS) mode of the NIRSpec instrument with the G395H/F290LP grating/filter combination (3–5 μm). While the data were used primarily to verify that the NIRSpec BOTS mode is working as expected, and to enable it for general scientific use, they yield a precise transmission spectrum which we find is featureless down to the precision level of the instrument, consistent with expectations given HAT-P-14 b’s small scale-height and hence expected atmospheric features. The exquisite quality and stability of the JWST/NIRSpec transit spectrum—almost devoid of any systematic effects—allowed us to obtain median uncertainties of 50–60 ppm in this wavelength range at a resolution of R = 100 in a single exposure, which is in excellent agreement with pre-flight expectations and close to the (or at the) photon-noise limit for a J = 9.094, F-type star like HAT-P-14. These observations showcase the ability of NIRSpec/BOTS to perform cutting-edge transiting exoplanet atmospheric science, setting the stage for observations and discoveries to be made in Cycle 1 and beyond.

Issue Information

Atmospheric Science LettersVolume 24, Issue 1 e1102 ISSUE INFORMATIONOpen Access Issue Information First published: 02 January 2023 https://doi.org/10.1002/asl.1102AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume24, Issue1January 2023e1102 RelatedInformation

Establishment of Earth Science Knowledge Framework for Undergraduates Majoring in Atmospheric Science Based on Geological Knowledge Practice—Research and Practice of Geological Cognition Practice Teaching in Qinhuangdao

Establishment of Earth Science Knowledge Framework for Undergraduates Majoring in Atmospheric Science Based on Geological Knowledge Practice—Research and Practice of Geological Cognition Practice Teaching in Qinhuangdao