Improving Short-Term QPF Using Geostationary Satellite All-Sky Infrared Radiances: Real-Time Ensemble Data Assimilation and Forecast during the PRECIP 2020 and 2021 Experiments

The Prediction of Rainfall Extremes Campaign In the Pacific (PRECIP) aims to improve our understanding of extreme rainfall processes in the East Asian summer monsoon. A convection-permitting ensemble-based data assimilation and forecast system (the PSU WRF-EnKF system) was run in real time in the summers of 2020–21 in advance of the 2022 field campaign, assimilating all-sky infrared (IR) radiances from the geostationary Himawari-8 and GOES-16 satellites, and providing 48-h ensemble forecasts every day for weather briefings and discussions. This is the first time that all-sky IR data assimilation has been performed in a real-time forecast system at a convection-permitting resolution for several seasons. Compared with retrospective forecasts that exclude all-sky IR radiances, rainfall predictions are statistically significantly improved out to at least 4–6 h for the real-time forecasts, which is comparable to the time scale of improvements gained from assimilating observations from the dense ground-based Doppler weather radars. The assimilation of all-sky IR radiances also reduced the forecast errors of large-scale environments and helped to maintain a more reasonable ensemble spread compared with the counterpart experiments that did not assimilate all-sky IR radiances. The results indicate strong potential for improving routine short-term quantitative precipitation forecasts using these high-spatiotemporal-resolution satellite observations in the future.Significance StatementDuring the summers of 2020/21, the PSU WRF-EnKF data assimilation and forecast system was run in real time in advance of the 2022 Prediction of Rainfall Extremes Campaign In the Pacific (PRECIP), assimilating all-sky (clear-sky and cloudy) infrared radiances from geostationary satellites into a numerical weather prediction model and providing ensemble forecasts. This study presents the first-of-its-kind systematic evaluation of the impacts of assimilating all-sky infrared radiances on short-term qualitative precipitation forecasts using multiyear, multiregion, real-time ensemble forecasts. Results suggest that rainfall forecasts are improved out to at least 4–6 h with the assimilation of all-sky infrared radiances, comparable to the influence of assimilating radar observations, with benefits in forecasting large-scale environments and representing atmospheric uncertainties as well.

Astro-photography as an effective tool for Outreach and Education: IACT in exposition

In our epoch, images are a powerful way to convey a message to a large audience. Through the use of amazing astronomical photographs, science can be communicated effectively at different levels, to a very diverse audience of all ages. In fact, astrophotography combines aesthetic appeal with the illustration of the science behind astronomical phenomena. This is the aim of the exhibit "A che Punto è la NOTTE - A scientific exhibition of astrophotography” organized by us in Italy, in October 2020, with the partnership of the cultural association PhysicalPub. Many different authors, both single individuals and professional or amateur observatories, were asked to send their best pictures. The 54 astronomical images chosen by a scientific committee, categorised in three different topics (night landscape, deep sky, instrumentation), were seen by more than 2000 visitors and 11 school groups (despite the difficult period due to the COVID pandemic). A free audio-guide, available on-line through a web-application developed on purpose, delivered scientific explanations of images for self-guided tours. Conferences and guided tours were also organized. The highlight of the exhibit were four mirrors from the MAGIC telescope and an ASTRI scale-model that allowed an in-depth description of how an Imaging Atmospheric Cherenkov Telescope (IACT) works, introducing the science of VHE cosmic radiation. We will summarize the main difficulties in organizing this event and the feedback we had from the visitors. The exhibit is still available online, visiting the website mostrascientifica.it or via the web audio-guide (english and italian) at guida.mostrascientifica.it. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

Quantitative electroencephalography interpretation of human brain activity after COVID-19 before and after Sudarshan Kriya Yoga.

The COVID-19 pandemic has affected the entire world. The SARS-CoV-2 virus is wreaking havoc globally, leading to serious health problems and even death. The purpose of this study is to present the brainwave variability pattern using QEEG after exposure to COVID-19 and to introduce the subject of the Sudarshan Kriya Yoga (SKY)-based breathing technique. QEEG is one of the basic neurological examinations through which we can compare the changes in the nervous system after SARS-CoV-2 virus infection and observe the variation of brainwave frequencies with a breathing technique.

Cyber-Cosmos: A new citizen science concept in a dark sky destination

Astrotourism and related citizen science activities are becoming a major trend of a sustainable, high-quality tourism segment, core elements to the protection of Dark skies in many countries. In the Summer of 2020, in the middle of COVID pandemics, we started an initiative to train young students - Cyber-Cosmos - using an Unistellar eVscope, a smart, compact and user-friendly digital telescope that offers unprecedented opportunities for deep-sky observation and citizen science campaigns. Sponsored by the Ciência Viva Summer program, this was probably the first continuous application of this equipment in a pedagogical and citizen-science context, and in a pandemic context. Pampilhosa da Serra, home to a certified Dark Sky destination (Aldeias do Xisto) in central Portugal, was the chosen location for this project, where we expect astrotourism and citizen science to flourish and contribute to space sciences education.

Effects of COVID-19 Pandemic Lockdown on Night Sky Brightness, Temperature and Air Quality Index: Case Study in Shah Alam, Selangor

In this preliminary study, we compared Night Sky Brightness (NSB) in Shah Alam during the implementation of Movement Control Order (MCO) lockdown due to COVID-19 pandemic in June 2021 with the same duration in June 2020. Sky Quality Meter (SQM) was used to measure NSB in unit Magnitude per Square Arc Second (MSAS) while temperature was in Celsius and they were collected in Shah Alam, Selangor. The air quality information was obtained from the Malaysian AQI website. This project investigates the impact of economic and social activities during MCO lockdown to NSB, air pollution and temperature. Within the analysed time frame, the results indicate that there are some effects produced by MCO lockdown to the observed light or NSB, temperature and air pollution. On the average, the NSB, temperature and AQI have decreased by 0.25, 1.55 and 1.0, respectively. This shows that during the MCO lockdown, the air is cleaner and cooler;and the sky is darker which originates from improved air quality due to less air and road traffics;plus less industrial and human outdoor activities. © 2022 IEEE.

LDACS Broadcast Digital Voice Concept and Expected Performance

The amount of air traffic is rapidly recovering from the COVID-19 pandemic and beginning to rise above previous levels. As a result, the VHF band is expected to become saturated in the near future, harmfully affecting air traffic management. As one solution for the increased need for aeronautical connectivity, the terrestrial LDACS data link has been designed and is in the process of ICAO standardization. However, LDACS development has been primarily focused on data communication and digital voice protocols have not been fully defined yet. This paper presents the proposed LDACS digital voice architecture developed in the framework of the Single European Sky ATM Research (SESAR) program. The LDACS digital voice air-ground communication protocol is validated and evaluated in computer simulations. It is shown that the SESAR-specified functional and performance requirements are satisfied. © 2022 IEEE.

An Assessment of Geosites and Geomorphosites in the Lut Desert of Shahdad Region for Potential Geotourism Development

In the fields of geology, economics, history, cultural studies, and ecology, tourism can be the basis for proper planning, for sustainable tourism management, and for economic development. The Dasht-e Lut is one of the most significant desert areas in Iran due to its exemplary desert patterns and world-famous landscapes, such as the kaluts and nebkhas landforms. Furthermore, it is the hottest spot in the world and can attract adventurous tourists, amongst others, from around the globe. The purpose of this study was to determine and compare the most suitable geomorphosites for better sustainable tourism planning using three methods of evaluating geotourism as proposed by Pereira et al., Pralong, and Reynard et al. The results show that the geomorphosites of kaluts, nebkhas, and Gandom Beryan had the greatest potential for different reasons. In addition to geosites and geomorphosites, the night sky was also demonstrated to have a high potential to attract tourists. Using the economic criteria of the Reynard method, all geomorphosites had similar scores. The familiarity of officials and tourism planners with the tourist capabilities of this region can lead to economic and cultural capacity building for the Indigenous people and the tourism industry.

Improved monitoring of shipping NO2 with TROPOMI: decreasing NOx emissions in European seas during the COVID-19 pandemic

TROPOMI (TROPOspheric Monitoring Instrument) measurements of tropospheric NO2 columns provide powerful information on emissions of air pollution by ships on open sea. This information is potentially useful for authorities to help determine the (non-)compliance of ships with increasingly stringent NOx emission regulations. We find that the information quality is improved further by recent upgrades in the TROPOMI cloud retrieval and an optimal data selection. We show that the superior spatial resolution of TROPOMI allows for the detection of several lanes of NO2 pollution ranging from the Aegean Sea near Greece to the Skagerrak in Scandinavia, which have not been detected with other satellite instruments before. Additionally, we demonstrate that under conditions of sun glint TROPOMI's vertical sensitivity to NO2 in the marine boundary layer increases by up to 60 %. The benefits of sun glint are most prominent under clear-sky situations when sea surface winds are low but slightly above zero (±2 m s-1). Beyond spatial resolution and sun glint, we examine for the first time the impact of the recently improved cloud algorithm on the TROPOMI NO2 retrieval quality, both over sea and over land. We find that the new FRESCO+ (Fast Retrieval Scheme for Clouds from the Oxygen A band) wide algorithm leads to 50 hPa lower cloud pressures, correcting a known high bias, and produces 1–4×1015 molec. cm-2 higher retrieved NO2 columns, thereby at least partially correcting for the previously reported low bias in the TROPOMI NO2 product. By training an artificial neural network on the four available periods with standard and FRESCO+ wide test retrievals, we develop a historic, consistent TROPOMI NO2 data set spanning the years 2019 and 2020. This improved data set shows stronger (35 %–75 %) and sharper (10 %–35 %) shipping NO2 signals compared to co-sampled measurements from OMI. We apply our improved data set to investigate the impact of the COVID-19 pandemic on ship NO2 pollution over European seas and find indications that NOx emissions from ships reduced by 10 %–20 % during the beginning of the COVID-19 pandemic in 2020. The reductions in ship NO2 pollution start in March–April 2020, in line with changes in shipping activity inferred from automatic identification system (AIS) data on ship location, speed, and engine.

Three-Dimensional Surface Downwelling Longwave Radiation Clear-Sky Effects in the Upper Colorado River Basin

In complex terrain, non-parallel surfaces receive emitted radiation from adjacent surfaces. Qualitatively, where surface skin temperatures and lower tropospheric temperature and humidity are not uniform, the downwelling longwave radiation (DLR) will be determined not just by radiation from the atmosphere above a given location, but also by adjacent surface temperatures. We quantify this three-dimensional longwave radiative effect over the Upper Colorado River Basin in clear-sky conditions by calculating surface DLR with observed land-surface temperatures from ECOSTRESS. We find that this effect is due to terrain-subtended sky-view and represents ∼22% of the surface longwave flux, rising to ∼28% and ∼24% in the East and Southeast of the Basin, respectively, and can be >50% in extreme cases. The common omission of this effect in atmospheric radiation models leads to an underestimation of DLR in complex terrain, especially at higher elevations, which has significant implications for mountainous ecohydrology simulations. © 2022 The Authors.

Breathing Air

“Breathing the air” is what we want! This is the theme of the performative action that we create through videoconferencing systems to provide a sensorial and virtual artistic experience. The narrative is created in a non-linear way by what I call Immersion Dramaturgy. The COVID devastates Brazil due to the approximately 600,000 people who cannot breathe and have had their lives interrupted by the government’s lack of control of the disease. We are also affected metaphorically due to the feeling of the impotence of those who still live, for not knowing how to change the social chaos of public health and instituted necropolitics. The performance exposes the lack of air but tries to show that a new day of sunshine, clear skies, and birdsong will return. © 2021 Association for Computing Machinery.

Reinventing European air traffic control based on the covid-19 pandemic experience.

This article/paper proposes to take advantage of the crisis resulting from COVID-19 and its' impact on Air Traffic Control (ATC) in Europe to reinvent it. The article explains its evolution, in particular, 20 years of Single European Sky reform process not having overcome the gridlock. The impact of the COVID-19 on aviation in general and specifically on ATC is described. It focuses on the avenues to overcome fragmentation and competing interests of the various stakeholders by reinventing EUROCONTROL Organisation as the agent to recover from the economic crisis.

Looking Up to the Stars. A Call for Action to Save New Zealand’s Dark Skies for Future Generations to Come

The rapid development of technology coupled with humanity’s desire to reach beyond terra firma, has resulted in more than 60 years of Outer Space activities. Although the exploration of space has provided many advantages and benefits to society so far, including vast, new information that has greatly added to our understanding of our planet and beyond, unfortunately, mankind’s footprint has negative aspects that need to be minimised as much as possible. In recent decades, a major worldwide problem has emerged in regard to the significant increase in light pollution from ground-based illuminations, as well as a lack of proper regulatory frameworks to mitigate the issue in order to protect the night sky and astronomical research. More recently, due to the escalating demand of air space for microsatellites and the rapid development of these new space technologies, as well as unmanned aerial vehicles (UAV), a new problem has arisen connected to visual light pollution (VLP). New Zealand has been especially affected, as, because of its dark skies, it has the third highest number of astronomical observatories in the world. The aim of this research is to identify critical areas for broader investigation;an action plan to improve the impact of new technologies is urgently required, not only at a national level but also worldwide. This is crucial in order to preserve humanity’s right to access the night sky and to also enable continual professional and amateur night-time observations for the present and the future, as well as for New Zealand to become a Dark Sky Nation.

A human-centred assessment framework to prioritise heat mitigation efforts for active travel at city scale.

Hot weather not only impacts upon human physical comfort and health, but also impacts the way that people access and experience active travel options such as walking and cycling. By evaluating the street thermal environment of a city alongside an assessment of those communities that are the most vulnerable to the effects of heat, we can prioritise areas in which heat mitigation interventions are most needed. In this paper, we propose a new approach for policy makers to determine where to delegate limited resources for heat mitigation with most effective outcomes for the communities. We use eye-level street panorama images and community profiles to provide a bottom-up, human-centred perspective of the city scale assessment, highlighting the situation of urban tree shade provision throughout the streets in comparison with environmental and social-economic status. The approach leverages multiple sources of spatial data including satellite thermal images, Google street view (GSV) images, land use and demographic census data. A deep learning model was developed to automate the classification of streetscape types and percentages at the street- and eye-view level. The methodology is metrics based and scalable which provides a data driven assessment of heat-related vulnerability. The findings of this study first contribute to sustainable development by developing a method to identify geographical areas or neighbourhoods that require heat mitigation; and enforce policies improving tree shade on routes, as a heat adaptation strategy, which will lead to increasing active travel and produce significant health benefits for residents. The approach can be also used to guide post COVID-19 city planning and design.