scholarly journals Effects of the COVID-19 Lockdown on Urban Light Emissions: Ground and Satellite Comparison

2021 ◽  
Vol 13 (2) ◽  
pp. 258
Author(s):  
Máximo Bustamante-Calabria ◽  
Alejandro Sánchez de Miguel ◽  
Susana Martín-Ruiz ◽  
Jose-Luis Ortiz ◽  
José M. Vílchez ◽  
...  
Keyword(s):  
Economic Activity ◽  
Primary Source ◽  
Clear Correlation ◽  
Light Pollution ◽  
Nocturnal Activity ◽  
Empirical Expression ◽  
Anthropogenic Aerosol ◽  
The Earth ◽  
Sky Brightness ◽  
The City

‘Lockdown’ periods in response to COVID-19 have provided a unique opportunity to study the impacts of economic activity on environmental pollution (e.g., NO2, aerosols, noise, light). The effects on NO2 and aerosols have been very noticeable and readily demonstrated, but that on light pollution has proven challenging to determine. The main reason for this difficulty is that the primary source of nighttime satellite imagery of the earth is the SNPP-VIIRS/DNB instrument, which acquires data late at night after most human nocturnal activity has already occurred and much associated lighting has been turned off. Here, to analyze the effect of lockdown on urban light emissions, we use ground and satellite data for Granada, Spain, during the COVID-19 induced confinement of the city’s population from 14 March until 31 May 2020. We find a clear decrease in light pollution due both to a decrease in light emissions from the city and to a decrease in anthropogenic aerosol content in the atmosphere which resulted in less light being scattered. A clear correlation between the abundance of PM10 particles and sky brightness is observed, such that the more polluted the atmosphere the brighter the urban night sky. An empirical expression is determined that relates PM10 particle abundance and sky brightness at three different wavelength bands.

scholarly journals Effects of the COVID-19 Lockdown on Urban Light Emissions: Ground and Satellite Comparison

2020 ◽  
Author(s):  
Máximo Bustamante-Calabria ◽  
Alejandro Sánchez De Miguel ◽  
Susana Martín-Ruiz ◽  
J. L. Ortiz ◽  
J. M. Vílchez ◽  
...  
Keyword(s):  
Economic Activity ◽  
Primary Source ◽  
Clear Correlation ◽  
Light Pollution ◽  
Nocturnal Activity ◽  
Empirical Expression ◽  
Anthropogenic Aerosol ◽  
The Earth ◽  
Sky Brightness ◽  
The City

’Lockdown’ periods in response to COVID-19 have provided a unique opportunity to study the impacts of economic activity on environmental pollution (e.g. NO2, aerosols, noise, light). The effects on NO2 and aerosols have been very noticeable and readily demonstrated, but that on light pollution has proven challenging to determine. The main reason for this difficulty is that the primary source of nighttime satellite imagery of the earth is the SNPP-VIIRS/DNB instrument, which acquires data late at night after most human nocturnal activity has already occurred and much associated lighting has been turned off. Here, to analyze the effect of lockdown on urban light emissions, we use ground and satellite data for Granada, Spain, during the COVID-19 induced confinement of the city’s population from March 14 until May 31, 2020. We find a clear decrease in light pollution due both to a decrease in light emissions from the city and to a decrease in anthropogenic aerosol content in the atmosphere which resulted in less light being scattered. A clear correlation between the abundance of PM10 particles and sky brightness is observed, such that the more polluted the atmosphere the brighter the urban night sky. An empirical expression is determined that relates PM10 particle abundance and sky brightness at three different wavelength bands.

scholarly journals Light pollution in the night sky of Toruń in the summer season

2019 ◽  
Vol 17 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Dominika Karpińska ◽  
Mieczysław Kunz
Keyword(s):  
Land Cover ◽  
Land Development ◽  
Summer Season ◽  
City Centre ◽  
Light Pollution ◽  
Single Family ◽  
Family Housing ◽  
Sky Brightness ◽  
Night Sky ◽  
The City

Abstract The paper presents results of research on light pollution in the night sky of Toruń. A permanent network of measuring stations has been established in the city, consisting of 24 sites representing various types of land development and land cover: single-family housing, city centre, multi-family housing, areas overgrown with vegetation and open areas. Within this network, a repeatable direct measurement of the sky brightness using an SQM photometer was carried out over a period of three consecutive months in the summer season, i.e. from June to September 2017. The measurement sessions were conducted in similar weather and astronomical conditions. Based on the obtained data, a spatial distribution of light pollution was determined, ranges of values obtained during the measurements were provided, and the results were additionally referred to the distinguished land cover categories and land development types.

Forecasting the fl ood situation using space images in the city of Tavda Sverdlovsk region

2018 ◽  
Vol 934 (4) ◽  
pp. 46-52
Author(s):  
A.S. Bruskova ◽  
T.I. Levitskaya ◽  
D.M. Haydukova
Keyword(s):  
Water Levels ◽  
Economic Damage ◽  
Geoinformation System ◽  
Space Images ◽  
Geoinformation Systems ◽  
Emergency Situations ◽  
The Earth ◽  
Maximum Water ◽  
The City

Flooding is a dangerous phenomenon, causing emergency situations and causing material damage, capable of damaging health, and even death of people. To reduce the risk and economic damage from flooding, it is necessary to forecast flooding areas. An effective method of forecasting emergency situations due to flooding is the method of remote sensing of the Earth with integration into geoinformation systems. With the help of satellite imagery, a model of flooding was determined based on the example of Tavda, the Sverdlovsk Region. Space images are loaded into the geoinformation system and on their basis a series of thematic layers is created, which contains information about the zones of possible flooding at given water level marks. The determination of the area of flooding is based on the calculation of the availability of maximum water levels at hydrological stations. According to the calculated security data, for each hydrological post, flood zones are constructed by interpolation between pre-calculated flood zones of standard security. The results of the work can be used by the Main Directorate of the Ministry for Emergency Situations of Russia for the Sverdlovsk Region.

scholarly journals Dietary tissue cadmium accumulation in an amazonian teleost (Tambaqui, Colossoma macropomum Cuvier, 1818)

2007 ◽  
Vol 67 (4) ◽  
pp. 657-661 ◽  
Author(s):  
AYO. Matsuo ◽  
AL. Val
Keyword(s):  
Amazon Basin ◽  
Graphite Furnace ◽  
Primary Source ◽  
Cadmium Accumulation ◽  
Atomic Absorption Spectrophotometry ◽  
Colossoma Macropomum ◽  
Feeding Trials ◽  
Dry Food ◽  
Dietary Cadmium ◽  
The City

Understanding the effects of metal contamination in the Amazon basin is important because of the potential impact on this region of high biodiversity. In addition, the significance of fish as the primary source of protein for the local human population (living either alongside the Amazon River or in the city of Manaus) highlights the need for information on the metal transfer through the food chain. Bioaccumulation of metals in fish can occur at significant rates through the dietary route, without necessarily resulting in death of the organism. The goal of this work was to expose an economic relevant species from the Amazon basin (tambaqui, Colossoma macropomum) to dietary cadmium (Cd) at concentrations of 0, 50, 100, 200, and 400 µg.g-1 dry food. Fish were sampled on days 15, 30, and 45 of the feeding trials. Tissues were collected for analysis of Cd concentration using graphite furnace atomic absorption spectrophotometry. Cd accumulation in the tissues occurred in the following order: kidney > liver > gills > muscle. Relative to other freshwater fish (e.g., rainbow trout, tilapia), tambaqui accumulated remarkably high levels of Cd in their tissues. Although Cd is known to affect Ca2+ homeostasis, no mortality or growth impairment occurred during feeding trials.

scholarly journals THE CONTRIBUTION OF MIGRATION TO ECONOMIC GROWTH: THE EXAMPLE OF THE CITY OF ZAGREB

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Vinko Miličević ◽  
Danijel Knežević ◽  
Zoran Bubaš
Keyword(s):  
Economic Growth ◽  
European Union ◽  
Economic Activity ◽  
Economic Benefits ◽  
Gdp Per Capita ◽  
The European Union ◽  
Per Capita ◽  
The Republic ◽  
The Impact ◽  
The City

The problems in this paper belong to the field of migration and economy. The connection between migration and the economy has been proven on a global level, and as far as the Republic of Croatia is concerned, it is especially important to observe it through the City of Zagreb, which is the most important migration and economic center in the Republic of Croatia. Also, the accession of the Republic of Croatia to the European Union emphasized the observation and research of this connection because it created the preconditions for freer movement and employment of the population of the Republic of Croatia and the City of Zagreb within the European Union. The aim of this paper is to determine the contribution of migration to the economic growth of the City of Zagreb. The hypothesis presented in the paper is that there is a significant contribution of migration to the economic growth of the City of Zagreb. The disposition of the paper consists of six parts. The introduction explains the relevance of the topic, states the aim of the paper and hypotheses, explains the empirical part, the contribution of the paper and the disposition. The second part of the paper refers to the theoretical framework of the impact of migration on economic growth. The third part of the paper presents the migration processes of the City of Zagreb in the period from 2011 to 2018. The fourth part deals with economic activity in the City of Zagreb in the period from 2011 to 2017. The observed indicators of economic activity in the City of Zagreb are GDP and GDP per capita, and the graph in this part of the paper shows that GDP and GDP per capita in the observed period are higher at the end of the period than at the beginning. The fifth part of the paper refers to the empirical research of the contribution of migration to the economic growth of the City of Zagreb. The empirical part of the paper is based on correlations and regression analyses. This paper proves the hypothesis because the results indicate a significant impact of the variables of total and external migration on the GDP of the City of Zagreb and GDP per capita of the City of Zagreb. Decision-makers in the City of Zagreb can use the results of the research as a basis for maximizing the economic benefits they can get from migration. The conclusion provides an overview of the aim of the work, the results of the research, the limitations, the implications and the recommendations for future research.

scholarly journals Analisis Pertumbuhan Ekonomi Provinsi Jambi 2012-2019

2020 ◽  
Vol 4 (2) ◽  
pp. 85
Author(s):  
M Yunus ◽  
Novi Mubyarto ◽  
Robi Agustin
Keyword(s):  
Economic Growth ◽  
Economic Activity ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Coefficient Of Determination ◽  
Advantages And Disadvantages ◽  
The Earth ◽  
Growth Economic ◽  
Main Factor

The development achievement of an economic activity can be measured by economic growth. Economic growth will improve if there are activities carried out by humans for the prosperity of the earth and their prosperity. An important factor for increasing economic growth is international trade, one of which is exports. Allah SWT has created in every region and country the advantages and disadvantages. The main factor that also has an influence on the economic development of a country / region is investment activities. Regarding investment in the Al Qur’an, it is clearly stated that investing is a way that is ordered by Allah SWT not to leave the weak generation. In this study, an analysis of the economic growth of the province of Jambi was conducted in 2012-2019. The method used is multiple linear regression analysis. Based on the results of using the R application, there is a significant influence between the export variable and the investment variable on the economic growth variable. The modeling results obtained are Y = 5848.0543 + 0.8886X1 + 0.7929X2. Every increase in exports of 1 billion and investment is considered constant, it will increase economic growth by 0.8886 billion. Every increase in investment of 1 billion and exports are considered constant, it will increase economic growth by 0.7929 billion. The coefficient of determination of 94.06 percent means that the diversity of economic growth variables can be explained by the export and the investment, the remaining 5.94% is explained by other variables not included in the regression model.

scholarly journals Intervención pública en el paisaje urbano en Madrid. Un informe = Public intervention in the urban landscape in Madrid. A report

2019 ◽  
pp. 26
Author(s):  
Antonio Díaz Sotelo
Keyword(s):  
Economic Activity ◽  
Urban Landscape ◽  
Public And Private ◽  
Public Intervention ◽  
The Public ◽  
Historic Center ◽  
Commercial Landscape ◽  
The Relationship ◽  
The City

ResumenEl objeto de este texto es la exposición y análisis de los procedimientos de intervención pública en el paisaje urbano de la ciudad de Madrid. El objetivo último de ese análisis es identificar el modelo público para el paisaje urbano en Madrid.  Este texto se centra en la exposición analítica de documentos oficiales antes que en sus conclusiones definitivas, por lo que le corresponde la denominación de Informe.  Este informe se organiza en dos partes: una exposición teórica que enmarca el posterior análisis de instrumentos administrativos de intervención en el paisaje.  Se concibe como parte de la investigación de Tesis Doctoral titulada “Transformación Reciente del Paisaje Comercial en el Centro Histórico”, acotada en un marco temporal de apenas diez años, marcado por la crisis y la desregulación económica, y en un marco territorial limitado al centro histórico de Madrid. Esa investigación se enmarca en una reflexión general sobre la relación entre actividad económica y paisaje urbano. El interés de este informe para la investigación es sobre la utilidad de ese modelo público para el paisaje urbano en Madrid como parámetro para valorar la rentabilidad de los esfuerzos públicos y privados en la mejora de la calidad del paisaje urbano.AbstractThe purpose of this text is the exhibition and analysis of public intervention procedures in the urban landscape of the city of Madrid. The ultimate goal of this analysis is to identify the public model for the urban landscape in Madrid. This text focuses on the analytical exposition of official documents rather than on their final conclusions, for which reason the denomination of Report corresponds. This report is organized in two parts: a theoretical exposition that frames the subsequent analysis of administrative instruments of intervention in the landscape. It is conceived as part of the Doctoral Thesis research titled "Recent Transformation of the Commercial Landscape in the Historic Center", bounded within a period of just ten years, marked by the crisis and economic deregulation, and in a territorial framework limited to the historic center of Madrid. This research is part of a general reflexion on the relationship between economic activity and urban landscape. The interest of this report for the investigation is about the utility of that public model for the urban landscape in Madrid as a parameter to assess the profitability of public and private efforts in improving the quality of the urban landscape.

scholarly journals El Salvador

2020 ◽  
Vol 20 (84) ◽  
Author(s):  
Keyword(s):  
Dominican Republic ◽  
El Salvador ◽  
Central America ◽  
Economic Activity ◽  
Technical Assistance ◽  
Data Series ◽  
National Accounts ◽  
San Salvador ◽  
Reserve Bank ◽  
The City

A Technical Assistance (TA) Mission from the Regional Technical Assistance Center for Central America, Panama, and the Dominican Republic, visited the city of San Salvador, El Salvador, on August 13–24, 2018, to provide TA to the Central Reserve Bank of El Salvador (BCRES) on compiling annual accounts by institutional sectors (AAIS) from 2014 onwards, as part of the data series from the base year of 2005. In March 2018, the BCRES published a dataset of quarterly and annual national accounts series by economic activity; a monthly volume indicator; backcasted series from 1990–2014; and Supply and Use Tables (SUT) from 2005 and 2014, with a base year of 2005. As part of the dataset to be prepared and disseminated in the new 2005 base year, the authorities requested TA to compile annual accounts focusing on institutional sectors starting in 2014.

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