scholarly journals Spatiotemporal Variability in the Glacier Snowline Altitude across High Mountain Asia and Potential Driving Factors

2021 ◽  
Vol 13 (3) ◽  
pp. 425
Author(s):  
Zhongming Guo ◽  
Lei Geng ◽  
Baoshou Shen ◽  
Yuwei Wu ◽  
Anan Chen ◽  
...  

The glacier snowline altitude (SLA) at the end of the melt season is an indicator of the glacier equilibrium line altitude and can be used to estimate glacier mass balance and reconstruct past climate. This study analyzes the spatiotemporal variability in glacier SLA across High Mountain Asia, including the Altai Mountains, Karakoram Mountains, Western Himalayas, Gongga Mountains, Tian Shan, and Nyainqentanglha Mountains, over the past 30 years (1989–2019) to better elucidate the state of these mountain glaciers. Remote-sensing data are processed to delineate the glacier SLA across these mountainous regions, and nearby weather station data are incorporated to determine the potential relationships between SLA and temperature/precipitation. The mean SLAs across the Altai and Karakoram mountains ranged from 2860 ± 169 m to 3200 ± 152 m and from 5120 ± 159 m to 5320 ± 240 m, respectively, with both regions experiencing an average increase of up to 137 m over the past 30 years. Furthermore, the mean glacier SLAs across the Western Himalayas and Gongga Mountains increased by 190–282 m over the past 30 years, with both regions experiencing large fluctuations. In particular, the mean glacier SLA across the Western Himalayas varied from 4910 ± 190 m in 1989 to 5380 ± 164 m in 2000, and that across the Gongga Mountains varied from 4960 ± 70 m in 1989 to 5330 ± 100 m in 2012. Correlation analyses between glacier SLA and temperature/precipitation suggest that temperature is the primary factor influencing glacier SLA across these High Mountain Asia glaciers. There is a broad increase in glacier SLA from the Altai Mountains to the Karakoram Mountains, with a decrease in glacier SLA with decreasing latitude across the Himalayas; the maximum SLA occurs near the northern slopes of the Western Himalayas. The glacier SLA is lower on the eastern side of the Tibetan Plateau and exhibits a longitudinal distribution pattern. These results are expected to provide useful information for evaluating the state of High Mountain Asia glaciers, as well as their response and feedback to climate change.

1996 ◽  
Vol 81 (4) ◽  
pp. 1850-1854 ◽  
Author(s):  
John B. West

West, John B. Prediction of barometric pressures at high altitudes with the use of model atmospheres. J. Appl. Physiol. 81(4): 1850–1854, 1996.—It would be valuable to have model atmospheres that allow barometric pressures (Pb) to be predicted at high altitudes. Attempts to do this in the past using the International Civil Aviation Organization or United States Standard Atmosphere model have brought such models into disrepute because the predicted pressures at high altitudes are usually much too low. However, other model atmospheres have been developed by geophysicists. The critical variable is the change of air temperature with altitude, and, therefore, model atmospheres have been constructed for different latitudes and seasons of the year. These different models give a large range of pressures at a given altitude. For example, the maximum difference of pressure at an altitude of 9 km is from 206 to 248 Torr, i.e., ∼20%. However, the mean of the model atmospheres for latitude of 15° (in all seasons) and 30° (in the summer) predicts Pb at many locations of interest at high altitude very well, with predictions within 1%. The equation is Pb(Torr) = exp (6.63268 − 0.1112 h − 0.00149 h2), where h is the altitude in kilometers. The predictions are good because many high mountain sites are within 30° of the equator and also many studies are made during the summer. Other models should be used for latitudes of 45° and above. Model atmospheres have considerable value in predicting Pb at high altitude if proper account is taken of latitude and season of the year.


Author(s):  
VICTOR BURLACHUK

At the end of the twentieth century, questions of a secondary nature suddenly became topical: what do we remember and who owns the memory? Memory as one of the mental characteristics of an individual’s activity is complemented by the concept of collective memory, which requires a different method of analysis than the activity of a separate individual. In the 1970s, a situation arose that gave rise to the so-called "historical politics" or "memory politics." If philosophical studies of memory problems of the 30’s and 40’s of the twentieth century were focused mainly on the peculiarities of perception of the past in the individual and collective consciousness and did not go beyond scientific discussions, then half a century later the situation has changed dramatically. The problem of memory has found its political sound: historians and sociologists, politicians and representatives of the media have entered the discourse on memory. Modern society, including all social, ethnic and family groups, has undergone a profound change in the traditional attitude towards the past, which has been associated with changes in the structure of government. In connection with the discrediting of the Soviet Union, the rapid decline of the Communist Party and its ideology, there was a collapse of Marxism, which provided for a certain model of time and history. The end of the revolutionary idea, a powerful vector that indicated the direction of historical time into the future, inevitably led to a rapid change in perception of the past. Three models of the future, which, according to Pierre Nora, defined the face of the past (the future as a restoration of the past, the future as progress and the future as a revolution) that existed until recently, have now lost their relevance. Today, absolute uncertainty hangs over the future. The inability to predict the future poses certain challenges to the present. The end of any teleology of history imposes on the present a debt of memory. Features of the life of memory, the specifics of its state and functioning directly affect the state of identity, both personal and collective. Distortion of memory, its incorrect work, and its ideological manipulation can give rise to an identity crisis. The memorial phenomenon is a certain political resource in a situation of severe socio-political breaks and changes. In the conditions of the economic crisis and in the absence of a real and clear program for future development, the state often seeks to turn memory into the main element of national consolidation.


Author(s):  
Walter Lowrie ◽  
Alastair Hannay

A small, insignificant-looking intellectual with absurdly long legs, Søren Kierkegaard (1813–1855) was a veritable Hans Christian Andersen caricature of a man. A strange combination of witty cosmopolite and melancholy introvert, he spent years writing under a series of fantastical pseudonyms, lavishing all the splendor of his mind on a seldom-appreciative world. He had a tragic love affair with a young girl, was dominated by an unforgettable Old Testament father, fought a sensational literary duel with a popular satiric magazine, and died in the midst of a violent quarrel with the state church for which he had once studied theology. Yet this iconoclast produced a number of brilliant books that have profoundly influenced modern thought. This classic biography presents a charming and warmly appreciative introduction to the life and work of the great Danish writer. It tells the story of Kierkegaard's emotionally turbulent life with a keen sense of drama and an acute understanding of how his life shaped his thought. The result is a wonderfully informative and entertaining portrait of one of the most important thinkers of the past two centuries.


2016 ◽  
Vol 5 (09) ◽  
pp. 4896
Author(s):  
Sripriya C.S.* ◽  
Shanthi B. ◽  
Arockia Doss S. ◽  
Antonie Raj I. ◽  
Mohana Priya

Scrub typhus (Orientia tsutsugamushi), is a strict intracellular bacterium which is reported to be a recent threat to parts of southern India. There is re-emergence of scrub typhus during the past few years in Chennai. Scrub typhus is an acute febrile illness which generally causes non-specific symptoms and signs. The clinical manifestations of this disease range from sub-clinical disease to organ failure to fatal disease. This study documents our laboratory experience in diagnosis of scrub typhus in patients with fever and suspected clinical symptoms of scrub typhus infection for a period of two years from April 2014 to April 2016 using immunochromatography and IgM ELISA methods. The study was conducted on 648 patients out of whom 188 patients were found to be positive for scrub typhus. Results also showed that pediatric (0 -12 years) and young adults (20 – 39 years) were more exposed to scrub typhus infection and female patients were more infected compared to male. The study also showed that the rate of infection was higher between September to February which also suggested that the infection rate is proportional to the climatic condition. Statistical analysis showed that the mean age of the patients in this study was 37.6, standard deviation was 18.97, CV % was 50.45. 


2020 ◽  
Vol 47 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Garry D. Carnegie

ABSTRACT This response to the recent contribution by Matthews (2019) entitled “The Past, Present, and Future of Accounting History” specifically deals with the issues associated with concentrating on counting publication numbers in examining the state of a scholarly research field at the start of the 2020s. It outlines several pitfalls with the narrowly focused publications count analysis, in selected English language journals only, as provided by Matthews. The commentary is based on three key arguments: (1) accounting history research and publication is far more than a “numbers game”; (2) trends in the quality of the research undertaken and published are paramount; and (3) international publication and accumulated knowledge in accounting history are indeed more than a collection of English language publications. The author seeks to contribute to discussion and debate between accounting historians and other researchers for the benefit and development of the international accounting history community and global society.


1980 ◽  
Vol 45 (3) ◽  
pp. 777-782 ◽  
Author(s):  
Milan Šolc

The establishment of chemical equilibrium in a system with a reversible first order reaction is characterized in terms of the distribution of first passage times for the state of exact chemical equilibrium. The mean first passage time of this state is a linear function of the logarithm of the total number of particles in the system. The equilibrium fluctuations of composition in the system are characterized by the distribution of the recurrence times for the state of exact chemical equilibrium. The mean recurrence time is inversely proportional to the square root of the total number of particles in the system.


Author(s):  
Rowan Nicholson

If the term were given its literal meaning, international law would be law between ‘nations’. It is often described instead as being primarily between states. But this conceals the diversity of the nations or state-like entities that have personality in international law or that have had it historically. This book reconceptualizes statehood by positioning it within that wider family of state-like entities. An important conclusion of the book is that states themselves have diverse legal underpinnings. Practice in cases such as Somalia and broader principles indicate that international law provides not one but two alternative methods of qualifying as a state: subject to exceptions connected with territorial integrity and peremptory norms, an entity can be a state either on the ground that it meets criteria of effectiveness or on the ground that it is recognized by all other states. Another conclusion is that states, in the strict legal sense in which the word is used today, have never been the only state-like entities with personality in international law. Others from the past and present include imperial China in the period when it was unreceptive to Western norms; pre-colonial African chiefdoms; ‘states-in-context’, an example of which may be Palestine, which have the attributes of statehood relative to states that recognize them; and entities such as Hong Kong.


Author(s):  
Simon Butt ◽  
Tim Lindsey

Many Indonesians—primarily those living in rural areas—still follow customary law (adat). The precise rules and processes of that adat differ significantly from place to place, even within short distances. This chapter shows that for many decades, adat has been subservient to national law. State-made law overrode it, leaving it applicable only in a very small proportion of cases where no national law applied, where judges could apply it as ‘living law’. Even in these cases, many judges ignored adat or distorted it when deciding cases. The 1945 Constitution was amended in 2000 to require the state to formally recognize and respect customary law, as practised in traditional communities. The Constitutional Court has given effect to this in various judicial review cases, as have some statutes enacted in the past decade or so. However, this constitutional and statutory ‘protection’ has been impeded in practice by requirements for traditional communities to be formally ‘recognized’ by their local governments, many of whom have been unresponsive to calls for recognition.


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