scholarly journals Climate Change In The Argentinean Wheat Region: Temperature And Precipitation At Two Contrasting Sites

Author(s):  
Silvana Marisol Luján Basile ◽  
Jorge Alberto Tognetti ◽  
Marcelo Luciano Gandini ◽  
William John Rogers

Abstract Global climate change is shifting temperature and precipitation regimes, which is modifying the environments that define wheat yield and quality. The current work characterises the changes that have occurred in the thermal and hydric environment in two contrasting sites of the wheat growing region of Argentina, allowing comparison between sites for these changes and for how the changes are accelerating. Temperature and precipitation variables were analysed by regression and trend testing (Mann Kendall), and future projections were made based upon significant relationships. The two sites compared were in the zones around the cities of Azul in the Province of Buenos Aires and Marcos Juárez in the Province of Córdoba, located approximately 500 km apart. The climate data analysed covered the period 1931–2014 for Azul and 1952–2014 for Marcos Juárez. At both sites, temperatures increased significantly in mean and extreme values over these periods, where the rate of change accelerated during the first years of the 21st century. The changes observed were in general more pronounced in Marcos Juárez than in Azul. Furthermore, in Marcos Juárez, mean precipitation increased from September to December and there was a higher frequency of extremes of precipitation greater than 100 mm in September and October during the early 21st century. Evidence was found for temperature rise and the occurrence of extreme temperature and precipitation events occurring differently between sites, as well as for its acceleration rate in the early 21st century. The projected future changes made implied that wheat yield is expected to suffer losses over the coming century.

2021 ◽  
Author(s):  
Farhan Aziz ◽  
Nadeem Tariq ◽  
Akif Rahim ◽  
Ambreen Mahmood

<p>In recent years, extreme events and their severe damage have become more common around the world. It is widely known that atmospheric greenhouse gases have contributed to global warming. <br>A set of appropriate indicators describing the extremes of climate change can be used to study the extent of climate change. This study reveals the trends of temperature extreme indices on the spatial scale in the western part of Northwest Himalayas. The study is conducted at 13 climate stations lies at a different altitude of the study area.The Daily maximum and minimum temperature data during 2000--2018 of stations obtained from the Pakistan Meteorological Department (PMD) and Water and Power Development Authority (WAPDA). The 12 extreme temperature indices (FD, SU, TXx , TXn., TNx, TNn, TN10p , TN90p, TX10p , TX90p, CSDI, WSDI) recommended by ETCCDI (Expert Team on Climate Change Detection and Indices) are used to study the variabilities in temperature extremes. These indices are characterized based on amplitude, persistence, and frequency. The analysis is performed by using R package of extremes “RClimDEX”. The analysis shows the frequency of summer days (Su) and warm spells (WSDI) have increasing trends in the Southwest region, whereas the frequency of cold spells and frost days have decreasing trends observed in the Northern region of the study areas. The maximum and minimum values of daily maximum temperature (TXX, TXN) increase in the foothill area of the region and decreasing trends in the high elevation region. The day and night get cool in the Northwest region, whereas the days and nights are showing warmer trends in low elevation regions of the study area. Overall, the study concludes that the Northwestern parts have cool trends while South West and South eastern parts have warm trends during the early 21st century.</p><p><strong>Key words:</strong>  Temperature Extremes, Northwest Himalayas, Trends, R-Climdex, Climate Change</p>


Author(s):  
Sophie Christman Lavin ◽  
E. Ann Kaplan

Ecocinema involves the human gaze looking at cinema through the lens of the environment, in a manner analogous to the way feminists provided the cinematic lens of gender in the 1970s. However, as with feminism, enormous differences pertain in regard to how the ecocinema lens is mobilized. In analyzing films from the late 1800s to the early 21st century, ecocinema studies has evolved to include critical lines of inquiry from perspectives of psychology, feminism, socioeconomics, science, and activism. Research frames used in these inquiries include: setting and landscape in films, ecological analyses of mainstream and independent fictional films, posthuman cinematic representations, transnational and regional, and more recently, trauma in speculative dystopian films. Ecocinema critics analyze films of various types, including Hollywood, independent, transnational, documentary, animated, art cinema, and especially climate fiction (“cli-fi”) films. Ramachandra Guha’s transnational typology of environmental ideologies will provide a useful starting place for the mapping of different perspectives in ecocinema. Guha distinguished utopian wilderness environmentalism, pervasive in the United States, from the agrarian focus typical in India. Meanwhile, most developed nations utilize scientific industrial methods to exploit the environment. Oftentimes, these latter approaches are grounded in growth economies and are thus in conflict with the unrealistic ideals of so-called neo-primitivism (NP). Neo-primitivism involves returning to simple, sustainable lifestyles within or close to the natural world—lifestyles that do no environmental damage. NP is beloved by many, but the consensus is that it is idealistic to consider going back to this way of life. A film such as Avatar (produced and directed by James Cameron in 2009) addresses the complexity of diverse constructions of nature by providing examples of utopian wilderness ideology that compete with, and are opposed to, the destructive scientific industrialism that disregards and dominates nature without compunction. Other films, such as Amazon Sisters (Sweeny, 1992), Elemental (Koch, Roshan, & Vaughan-Lee, 2012), Into the Wild (Blocker, Hildebrand, Kelly, & Penn, 2007), or Grizzly Man (Beggs & Herzog, 2005), act as simultaneous celebrations and critiques of wilderness ideologies and deal with gender and racial identities, and thus they have been a central focus of ecocinema scholarship. Although films from all genres have historically engaged environmental issues, it was rarely in a way that made a self-conscious or critical statement about the human impact on the natural world from the perspective of ecological concerns—this is the focus of ecocinema. See for example, Birt Acres’s Rough Sea at Dover (1895), the Lumiere Brothers’ Oil Wells of Baku (1896), Thomas Edison’s Sorting Refuse at Incinerating Plant, NYC (1903), and the British South Africa Company’s Rhodesia To-Day (1912). In the early 21st century, the genre that most often engages with the contemporary politics of climate change is the documentary. Documentaries, such as An Inconvenient Truth (Guggenheim, 2006), Manufactured Landscapes (Baichwal, 2006), Into Eternity (Eskilsson & Madsen, 2010), Chasing Ice (Ahrens & Orlowski, 2012), E-Waste Tragedy (Esteve, Popp, Úbeda, & Dannoritzer, 2014), This Changes Everything (Cuarón & Lewis, 2015), among others, critique human damage to the planet and thus position viewers as ethical witnesses. Such works hope to influence the outcome of our shared anthropocentric future. The analyses of ecocinema are addressed using two distinct methods—the macro and the micro. The macro method studies how films represent the large-scale processes of earth-based climate systems, and its lens evaluates how films represent climate and environmental dilemmas facing humans as a species. The micro-lens provides enhanced analyses that explore how gender, race, and class figure into the cultural work climate fantasies perform. This lens indexes the ways in which various cultures are often disproportionately impacted by climate systems.1 Oftentimes the macro and micro levels are both incorporated in a single film and reveal the intersection between climate and culture, as seen in Taklub (Trap, Castillo & Mendoza, 2015), a film that portrays Super-typhoon Haiyan and its impact on residents in Tacloban, Philippines. As background to mapping the texts, evolving science discourses will be emphasized as evidence for global warming but with the understanding that this evidence relies on modeling. Although our main concern with this cultural work in ecocinema is how climate change impacts across gender, race, and class, the inequalities revealed also speak to the politics of climate change evident in cinematic treatments of the issue.


2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Kuo Wang ◽  
Guolin Feng ◽  
Tianshu Ye ◽  
Xujia Wang ◽  
Peipei Liu

Based on the analysis of the feature of Asian continent becoming cold in the early 21st century winter under the background of global warming, the Asian Warming Hole (AWH) index is proposed in this paper to measure the intensity during the cold events process. Result shows that the Asian continent is indeed experiencing a cold stage in the early 21st century winter, but it is just in a cold phase and will become warmer in the future. In recent years the activity of the winter cold events has an obvious quasi-four-year cycle, which can be reflected by atmospheric circulation, and AO (Arctic Oscillation) may play a very important role. It is credible that Asian surface temperature will be higher in the coming 3-4 years compared with 2011 winter, signifying that the precipitation may increase correspondingly.


Linguistics ◽  
2020 ◽  
Vol 58 (6) ◽  
pp. 1543-1579
Author(s):  
Paula Rodríguez-Abruñeiras

AbstractThis article discusses the diachronic development of the Spanish multifunctional formula en plan (with its variant en plan de, literally ‘in plan (of)’ but usually equivalent to English like). The article has two main aims: firstly, to describe the changes that the formula has undergone since its earliest occurrences as a marker in the nineteenth century up to the early 21st century. The diachronic study evinces a process of grammaticalization in three steps: from noun to clause adverbial and then to discourse marker. Secondly, to conduct a contrastive analysis between en plan (de) and the English markers like and kind of/kinda so as to shed new light on the potential existence of a universal pathway of grammaticalization in the emergence of discourse markers.


2012 ◽  
Vol 51 (7) ◽  
pp. 915-921 ◽  
Author(s):  
Tianhui Chen ◽  
Lina Jansen ◽  
Adam Gondos ◽  
Katharina Emrich ◽  
Bernd Holleczek ◽  
...  

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