scholarly journals Long-Term Changes in Aerosol Loading and Observed Impacts on Radiative Budget over the Middle-East

2021 ◽  
Vol 8 (1) ◽  
pp. 8
Author(s):  
Baiju Dayanandan ◽  
Piyushkumar N. Patel ◽  
Pravash Tiwari ◽  
Issa Al-Amri ◽  
Smitha Thakadiyil ◽  
...  
Keyword(s):  
Middle East ◽  
Atmospheric Aerosols ◽  
Temporal Variability ◽  
Hydrological Cycle ◽  
Radiation Budget ◽  
Surface Cooling ◽  
Regional Energy ◽  
Aerosol Loading ◽  
Modis Aod

Atmospheric aerosols play essential roles in regional energy balance, hydrological cycle, and air quality, thus greatly influencing the global climate and public health. Rapid economic expansion, industrialization, urbanization, and energy demand have significantly enhanced anthropogenic emissions over the Middle East (ME) that received the utmost scientific attention. Therefore, we present the temporal variability of atmospheric aerosols over the ME for a period of 15 years (2005–2019). Here, the long-term measurements from the Moderate Resolution Imaging Spectroradiometer (MODIS) on Aqua, Cloud Aerosol Lidar with Orthogonal Polarization (CALIOP) onboard Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) and Clouds and the Earth’s Radiant Energy System (CERES) on Aqua are analyzed in order to understand the spatio–temporal variability of aerosols and their impacts on radiation budget over the ME. On average, a significant increase in aerosol optical depth (AOD) trend is observed by ~0.01 per year over ME. The peak aerosol loading was observed in summer (March–September) followed by the winter (October–February). A similar trend was observed in the CALIOP-derived extinct aerosol coefficients over ME. In addition, MODIS retrievals are validated against the AErosol RObotic NETwork (AERONET)’s ground-based sun photometers. Overall, MODIS AOD showed good agreement against AERONET AOD, with ~70% of the retrievals falling within the expected error and high correlation coefficient (R > 0.8). Furthermore, the associated changes in clear-sky Shortwave (SW) radiative flux indicates the enhanced aerosol loading over ME further increases the surface cooling (~1.2 W m−2 per year) and atmospheric warming (~1.8 W m−2 per year). Overall, the results suggest that enhanced aerosol emissions have significantly impacted the regional energy budget over ME during 2005–2019. The assessment also demonstrates the potential of synergetic use of multi-platform measurements for climate system studies.

scholarly journals Climatology of Cloud Vertical Structures from Long-Term High-Resolution Radiosonde Measurements in Beijing

Atmosphere ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 401
Author(s):  
Qing Zhou ◽  
Yong Zhang ◽  
Shuze Jia ◽  
Junli Jin ◽  
Shanshan Lv ◽  
...  
Keyword(s):  
High Resolution ◽  
Atmospheric Circulation ◽  
Frequency Distribution ◽  
Hydrological Cycle ◽  
Global Radiation ◽  
Circulation Model ◽  
Middle Level ◽  
Radiation Budget ◽  
Cloud Base

Clouds are significant in the global radiation budget, atmospheric circulation, and hydrological cycle. However, knowledge regarding the observed climatology of the cloud vertical structure (CVS) over Beijing is still poor. Based on high-resolution radiosonde observations at Beijing Nanjiao Weather Observatory (BNWO) during the period 2010–2017, the method for identifying CVS depending on height-resolved relative humidity thresholds is improved, and CVS estimation by radiosonde is compared with observations by millimeter-wave cloud radar and ceilometer at the same site. Good consistency is shown between the three instruments. Then, the CVS climatology, including the frequency distribution and seasonal variation, is investigated. Overall, the occurrence frequency (OF) of cloudy cases in Beijing is slightly higher than that of clear-sky cases, and the cloud OF is highest in summer and lowest in winter. Single-layer clouds and middle-level clouds are dominant in Beijing. In addition, the average cloud top height (CTH), cloud base height (CBH), and cloud thickness in Beijing are 6.2 km, 4.0 km, and 2.2 km, respectively, and show the trend of reaching peaks in spring and minimums in winter. In terms of frequency distribution, the CTH basically resides below an altitude of 16 km, and approximately 43% of the CBHs are located at altitudes of 0.5–1.5 km. The cloud OF has only one peak located at altitudes of 4–8 km in spring, whereas it shows a trimodal distribution in other seasons. The height at which the cloud OF reaches its peak is highest in summer and lowest in winter. To the best of our knowledge, the cloud properties analyzed here are the first to elucidate the distribution and temporal variation of the CVS in Beijing from a long-term sounding perspective, and these results will provide a scientific observation basis for improving the atmospheric circulation model, as well as comparisons and verifications for measurements by ground-based remote sensing equipment.

The Mortality Rate of COVID-19 in Iraq Compare with Iran and Turkey, its Association with the Bacillus Calmette-Guerin (BCG) vaccine and the Iraqi Preparedness Plan Prior to Pandemics. (Preprint)

2020 ◽  
Author(s):  
Rawand Essa
Keyword(s):  
Middle East ◽  
Mortality Rate ◽  
Daily Basis ◽  
Bcg Vaccine ◽  
Critical Position ◽  
Preparedness Plan ◽  
Contagious Diseases ◽  
History Of ◽  
The Government

BACKGROUND In the span of COVID-19, the mortality rate has been different from one country to another. As a country in the Middle East Iraq has a critical position, lies between Iran and Turkey while both countries coronavirus cases increase on daily basis, while Iranian mortality rate record is high similar to Turkey. After Wuhan city of China, Lombard of Italy, Qum city in Iran has the highest number of COVID-19 as a first country in the Middle East. OBJECTIVE aim of this study is to show the effect of BCG vaccine during pandemic diseases, especially nowadays at the time of COVID-19. One of the crucial observations is the government preparedness and strategic planning prior pandemics, in which the BCG vaccine is an attenuated live vaccine for control of tuberculosis (TB). BCG vaccine has a non-specific immune effect that is used against pathogens like bacteria and viruses, through the promotion of pro-inflammatory cytokines' secretion. METHODS An epidemiological study has been performed, and it shows that some countries are more prone to contagious diseases like COVID-19, regardless of the main cultural, religious, societal similarities among the three mentioned countries. The information data has been collected from WHO reports and worldometer in 18 February 2020 to 10 May 2020. Regarding the efficacy of the BCG vaccine, relevant data has been retrieved from Google scholar, Pub-med and BCG world-atlas. RESULTS COVID-19 mortality rates are at peak in Iran and Turkey while the mortality rate is very low in Iraq, while the patients that died in Iraq all had history of other long-term diseases as heart disease, blood pressure, cancer etc. CONCLUSIONS From the experiences of the three countries in the life span of COVID-19, the historical plan of BCG vaccine in Iraq in cooperation with WHO since the last decades it shows that COVID-19 mortality rate is lower than other countries due to the early vaccination of the Iraqis, otherwise Iraq is more fragile than Iran and Turkey due to the poor conditions of Iraq in terms of economics, politics, war and other aspects.

Influence of the ICCPR in the Middle East

2018 ◽  
Author(s):  
Başak Çali
Keyword(s):  
Middle East ◽  
Legal Status ◽  
Political Rights ◽  
Reporting Practices ◽  
Rights Protection ◽  
Liberal Democratic ◽  
East Region ◽  
Civil And Political Rights ◽  
State Responses

This chapter surveys the legal influence of the International Covenant on Civil and Political Rights (ICCPR) on the domestic laws of States in the Middle East region. It analyses ratification, reservation, and reporting practices, the domestic legal status of the ICCPR, and State responses to the Human Rights Committee’s concluding observations. The chapter argues that the ICCPR’s legal influence in the region is structurally hampered due to its lack of authoritative legal status and the dominance of defensive domestic legalism. A significant gap remains between the HRC’s vision of civil and political rights protection grounded in the entrenchment of liberal, democratic, and multicultural laws and the region’s authoritarian or majoritarian political structures that foreground security and treat non-majority identities as threats. The influence of the ICCPR on domestic laws in the Middle East remains a long-term battle, whereby small gains under limited legal opportunity structures remain the overarching norm.

No Justice Without Peace, But What Peace Is on Offer?

2020 ◽  
Author(s):  
Mark Kersten
Keyword(s):  
Middle East ◽  
International Criminal Court ◽  
International Criminal ◽  
Criminal Court ◽  
Term Stability ◽  
Long Term Stability ◽  
Peace Processes ◽  
Lasting Peace ◽  
Made In

Abstract Does the potential investigation into Palestine by the International Criminal Court (ICC) threaten the chances of a lasting ‘peace’ between Israel and Palestine? This article endeavours to answer that question and critically assesses claims that the Court could undermine peace in the Middle East. I first examine the key claims made in the so-called ‘peace versus justice’ debate. I then outline some of the specific arguments made in the context of a possible ICC investigation in Palestine that touch upon concerns over the Court’s impacts on peace processes and negotiations. Following this, I try to assess critically the validity of these claims, arguing that while it would be wrong to conclude that the ICC will invariably have positive impacts on efforts to establish peace, there is no evidence that the Court will undermine whatever ‘peace’ is currently on offer for Palestinians and Israelis. On the contrary, this ‘peace’ may itself be a threat to resolving the conflict peaceably and to long-term stability in the region. Finally, I conclude the article with some reflections on the peace-justice debate and its applicability to the Israel–Palestine situation.

Italy's politics without policy: Balancing Atlanticism and Europeanism in the Middle East

Modern Italy ◽  
2008 ◽  
Vol 13 (2) ◽  
pp. 135-153 ◽  
Author(s):  
Raffaella A. Del Sarto ◽  
Nathalie Tocci
Keyword(s):  
Foreign Policy ◽  
Middle East ◽  
The United States ◽  
The European Union ◽  
Short Term ◽  
The Government ◽  
Specific Interests ◽  
Policy Shifts ◽  
The Eu

Focusing on Italy's Middle East policies under the second Berlusconi (2001–2006) and the second Prodi (2006–2008) governments, this article assesses the manner and extent to which the observed foreign policy shifts between the two governments can be explained in terms of the rebalancing between a ‘Europeanist’ and a transatlantic orientation. Arguing that Rome's policy towards the Middle East hinges less on Italy's specific interests and objectives in the region and more on whether the preference of the government in power is to foster closer ties to the United States or concentrate on the European Union, the analysis highlights how these swings of the pendulum along the EU–US axis are inextricably linked to a number of underlying structural weaknesses of Rome's foreign policy. In particular, the oscillations can be explained by the prevalence of short-term political (and domestic) considerations and the absence of long-term, substantive political strategies, or, in short, by the phenomenon of ‘politics without policy’ that often characterises Italy's foreign policy.

scholarly journals Hydro-Meteorological Trends in an Austrian Low-Mountain Catchment

Climate ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 122
Author(s):  
Gerald Krebs ◽  
David Camhy ◽  
Dirk Muschalla
Keyword(s):  
Hydrological Cycle ◽  
Potential Evapotranspiration ◽  
Remote Sensing Data ◽  
Kendall Test ◽  
Adaptation Measures ◽  
Mitigation And Adaptation ◽  
Regional Impacts ◽  
Long Term Trends ◽  
Annual Scale

While ongoing climate change is well documented, the impacts exhibit a substantial variability, both in direction and magnitude, visible even at regional and local scales. However, the knowledge of regional impacts is crucial for the design of mitigation and adaptation measures, particularly when changes in the hydrological cycle are concerned. In this paper, we present hydro-meteorological trends based on observations from a hydrological research basin in Eastern Austria between 1979 and 2019. The analyzed variables include air temperature, precipitation, and catchment runoff. Additionally, the number of wet days, trends for catchment evapotranspiration, and computed potential evapotranspiration were derived. Long-term trends were computed using a non-parametric Mann–Kendall test. The analysis shows that while mean annual temperatures were decreasing and annual temperature minima remained constant, annual maxima were rising. Long-term trends indicate a shift of precipitation to the summer, with minor variations observed for the remaining seasons and at an annual scale. Observed precipitation intensities mainly increased in spring and summer between 1979 and 2019. Catchment actual evapotranspiration, computed based on catchment precipitation and outflow, showed no significant trend for the observed time period, while potential evapotranspiration rates based on remote sensing data increased between 1981 and 2019.

Temporal patterns and trends of surface ozone concentrations over Portugal

2021 ◽  
Author(s):  
Carla Gama ◽  
Alexandra Monteiro ◽  
Myriam Lopes ◽  
Ana Isabel Miranda
Keyword(s):  
Air Quality ◽  
Iberian Peninsula ◽  
Human Health ◽  
Temporal Variability ◽  
Urban Areas ◽  
Surface Ozone ◽  
Quality Data ◽  
Ozone Concentrations ◽  
Long Term Study

<p>Tropospheric ozone (O<sub>3</sub>) is a critical pollutant over the Mediterranean countries, including Portugal, due to systematic exceedances to the thresholds for the protection of human health. Due to the location of Portugal, on the Atlantic coast at the south-west point of Europe, the observed O<sub>3</sub> concentrations are very much influenced not only by local and regional production but also by northern mid-latitudes background concentrations. Ozone trends in the Iberian Peninsula were previously analysed by Monteiro et al. (2012), based on 10-years of O<sub>3</sub> observations. Nevertheless, only two of the eleven background monitoring stations analysed in that study are located in Portugal and these two stations are located in Porto and Lisbon urban areas. Although during pollution events O<sub>3</sub> levels in urban areas may be high enough to affect human health, the highest concentrations are found in rural locations downwind from the urban and industrialized areas, rather than in cities. This happens because close to the sources (e.g., in urban areas) freshly emitted NO locally scavenges O<sub>3</sub>. A long-term study of the spatial and temporal variability and trends of the ozone concentrations over Portugal is missing, aiming to answer the following questions:</p><p>-           What is the temporal variability of ozone concentrations?</p><p>-           Which trends can we find in observations?</p><p>-           How were the ozone spring maxima concentrations affected by the COVID-19 lockdown during spring 2020?</p><p>In this presentation, these questions will be answered based on the statistical analysis of O<sub>3</sub> concentrations recorded within the national air quality monitoring network between 2005 and 2020 (16 years). The variability of the surface ozone concentrations over Portugal, on the timescales from diurnal to annual, will be presented and discussed, taking into account the physical and chemical processes that control that variability. Using the TheilSen function from the OpenAir package for R (Carslaw and Ropkins 2012), which quantifies monotonic trends and calculates the associated p-value through bootstrap simulations, O<sub>3</sub> concentration long-term trends will be estimated for the different regions and environments (e.g., rural, urban).  Moreover, taking advantage of the unique situation provided by the COVID-19 lockdown during spring 2020, when the government imposed mandatory confinement and citizens movement restriction, leading to a reduction in traffic-related atmospheric emissions, the role of these emissions on ozone levels during the spring period will be studied and presented.</p><p> </p><p>Carslaw and Ropkins, 2012. Openair—an R package for air quality data analysis. Environ. Model. Softw. 27-28,52-61. https://doi.org/10.1016/j.envsoft.2011.09.008</p><p>Monteiro et al., 2012. Trends in ozone concentrations in the Iberian Peninsula by quantile regression and clustering. Atmos. Environ. 56, 184-193. https://doi.org/10.1016/j.atmosenv.2012.03.069</p>

China and the Revolutions in the Middle East and North Africa

2011 ◽  
Vol 3 (1-2) ◽  
pp. 192-203 ◽  
Author(s):  
Randall Peerenboom
Keyword(s):  
Social Justice ◽  
Middle East ◽  
North Africa ◽  
Authoritarian Regimes ◽  
Northern Africa ◽  
Mena Countries ◽  
Turn On ◽  
Potential Sources ◽  
The Government

The 2011 revolutions in the Middle East and Northern Africa (MENA) led to considerable hope for some people that China would experience a similar political uprising, as well as considerable anxiety for the ruling regime. The government’s immediate response was to downplay the risk of a similar event occurring in China by distinguishing between China and MENA, while at the same time cracking down on activists and other potential sources of instability—including attempts to organize popular revolutionary protests in China. Although the government has so far managed to avoid a similar uprising, neither response has been entirely successful. Despite a number of significant diff erences between China and MENA countries, there are enough commonalities to justify concerns about political instability. Moreover, relying on repression alone is not a long-term solution to the justified demands of Chinese citizens for political reforms and social justice. Whether China will ultimately be able to avoid the fate of authoritarian regimes in MENA countries will turn on its ability to overcome a series of structural challenges while preventing sudden and unpredictable events, like those that gave rise to the Arab revolutions, from spinning out of control.

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