Masoud Mo'ayyeri; Ali Jowzi Khomslouei
Volume 18, Issue 71 , November 2009, , Pages 20-25
Abstract
This paper summarizes the changes in gas reaction and climate tracing in the Holocene period (about 10,000 years ago), with respect to the four glacier periods of the past. The industrial era, which usually begins in the 18th century, is associated with increase in atmospheric greenhouse gases as a result ...
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This paper summarizes the changes in gas reaction and climate tracing in the Holocene period (about 10,000 years ago), with respect to the four glacier periods of the past. The industrial era, which usually begins in the 18th century, is associated with increase in atmospheric greenhouse gases as a result of fossil fuels and land use changes, and these are linked to an increase in the average temperature of the earth's surface during the last decade of the twenty-first century. However, the analyses carried out by Ruddiman, which take the Holocene era and the urban community into consideration, have unprecedentedly compared changes in atmospheric greenhouse gases with that of glacial records of the past four hundred thousand years. During this period, carbon dioxide (CO 2) and methane (CH4) have increased, and this increase is probably due to the beginning of agricultural activities and land clearing in Eurasia. These and other changes in land use resulting from agricultural and rural activities may cause poor climatic change and prevent land’s temperature fall, or maybe due to natural forces. Although the early evidence supports the theory of Ruddiman, forestry and agricultural activities during the period of urban community may have exerted an impact on the climate equal to at least eight thousand years of the past.
Mas'oud Mo'ayyeri; Ebrahim Mahmoudi
Volume 15, Issue 57 , May 2006, , Pages 26-29
Abstract
The city of Azna and the plain that has today taken the appearance of farmlands, has undergone many different conditions during its evolution, and it seems that the picture that we have from its activities today is different from its past situation; in other words, its structure and function has been ...
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The city of Azna and the plain that has today taken the appearance of farmlands, has undergone many different conditions during its evolution, and it seems that the picture that we have from its activities today is different from its past situation; in other words, its structure and function has been transformed. Considering the fact that the area in question, which is a part of the Roode Dez basin and has been previously under the water, has now changed into green lands and farms that, and in addition to provision of foodstuff, presents a beautiful landscape, there is a question whether these great achievements will be as effective in future as today, or they will turn over time into destructive factors threatening the livelihood and life of this land’s people.
Mas'oud Mo'ayyeri
Volume 13, Issue 51 , November 2004, , Pages 58-61
Abstract
In geographic studies, soil is not the focus of attention only as a natural resource, but more of a crucial asset which is exposed to a fatal threat called erosion, and thus needs to be examined, protected and maintained. From the point of view of geomorphology, the concept of erosion is on the one hand ...
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In geographic studies, soil is not the focus of attention only as a natural resource, but more of a crucial asset which is exposed to a fatal threat called erosion, and thus needs to be examined, protected and maintained. From the point of view of geomorphology, the concept of erosion is on the one hand connected with the processes affecting the face of the earth and, and on the other, with factors that act against soil conservation. It is clear that the level and type of erosion of soil varies from place to place, and awareness of these quantities can be greatly useful in planning.The concept of erosion is a very broad and deep topic in geomorphology that can be considered from different perspectives.The geographic concept of erosion is not the same as its concept as considered in geology, physics or soil science. The term erosion is derived from the verb “to erode”, and is referred to as the set of processes in which the external surface of the earth's crust loses its stability and is displaced. This concept involves the processes of degradation, dissolution, carriage and sedimentation. According to studies conducted in Iran, an average of 1,500 tons of soil is washed out by water erosion per year. This means that every year, one millimeter of soil thickness in the country is lost (Karami, 1993, thesis) Considering the position and characteristics of Najaf Abad Plain watershed system, it seems that the energy generated by collision of rain drops to the surface of the earth and the resulting runoff is the most important erosive force in the watershed system, which, in interaction with erodible factors, determines the rate of soil erosion. Therefore, in this paper, in order to assess the erosion dangers and estimate its quantity and level, the application of the SLEMSA model has been emphasized, because in this model, utilization of curvature correlations and consideration of the interactions of the factors involved in erosion are given the priority.
Mas'oud Moayyeri
Volume 9, Issue 35 , November 2000, , Pages 53-56
Abstract
Construction rocks and minerals have formed an important part of the world's income since long ago. The utilization of these resources is increasing day by day due to the concerns regarding beauty and strength in the construction of public and private buildings. On the other hand, a transformation occurs ...
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Construction rocks and minerals have formed an important part of the world's income since long ago. The utilization of these resources is increasing day by day due to the concerns regarding beauty and strength in the construction of public and private buildings. On the other hand, a transformation occurs in urban morphology and landscape due to this ever-increasing utilization of these resources.The land of Iran is of great value and importance among the countries of South West Asia and the Middle East owing to vast resources of construction rocks in the Alborz and Zagros mountains, the central masses and foothills whose formation started since the second period of geology and completed its evolutionary stages in the third period.The emergence of rich construction rock masses in most parts of Iran and the existence of great roads in the north and south of the country are economically important advantages for Iran.
Historical documents and evidences show that utilization of these rocks as export commodities has been customary in Iran since ancient times. Regarding the Islamic Republic of Iran’s the strategy for economic development and its emphasis on expansion of non-oil exports, and the huge reserves of these valuable resources in different regions of the country and also the need of different countries, especially the countries around the Persian Gulf, to these resources, it is clear that such reserves have great potentials for foreign exchange earnings and economic development of the country, and thus can be considered as a valuable source for non-oil exports. In this paper, the author attempts to use historical and descriptive methods to introduce these resources and analyze the economic-commercial value and potential of these export items in the development and progress of the Islamic Republic of Iran.
Masoud Mo'ayyeri
Volume 5, Issue 20 , February 1996, , Pages 35-44
Abstract
There are more than thirteen thouasand volcanos on the surface of earth. Any volcanic crater or set of craters close together are called a volcanic system for past eruptions.
Volcanic manifestations can be identified as Magma, which has been formed during volcanic activities and then gradually cooled ...
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There are more than thirteen thouasand volcanos on the surface of earth. Any volcanic crater or set of craters close together are called a volcanic system for past eruptions.
Volcanic manifestations can be identified as Magma, which has been formed during volcanic activities and then gradually cooled down. In some cases, these activities have continued for centuries, like the Etna Volcano in Italy, and in other cases they lasted only for a few hours, like the Niracongo in Zaire in 1977.
