Remote Sensing (RS)
Heshmat Karami; Zahra Sayadi
Abstract
Extended AbstractIntroductionCoral reefs are one of the most diverse and ecologically important areas in the world. However, with increasing ocean temperatures, many coral reefs are severely threatened by bleaching events. When the water is too warm, corals expel the algae that live in their tissues, ...
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Extended AbstractIntroductionCoral reefs are one of the most diverse and ecologically important areas in the world. However, with increasing ocean temperatures, many coral reefs are severely threatened by bleaching events. When the water is too warm, corals expel the algae that live in their tissues, causing the coral to turn completely white. When a coral bleaches, it is not dead, and corals can survive a bleaching event, but they are more stressed and at risk of dying. Today, in order to predict and identify areas at risk of coral bleaching, data based on satellite remote sensing are used. In this research, using 35-year data trends, the sea surface temperature in 2022 was predicted using ArcGIS Pro tools for the Persian Gulf area and possible areas exposed to thermal stress leading to coral bleaching were identified.Materials & Methods In order to predict the bleaching of corals, the research data archive of the American National Center for Atmospheric Research (NCAR) has been used. In this analysis, the harmonic method was used to fit the trend line. A harmonic trendline is a periodically repeating curved line that is best used to describe data that follows a cyclical pattern. For anomaly analysis parameters, the average monthly temperature in each location was compared with the overall average temperature to identify anomalies. There are three mathematical methods for calculating anomaly values with the Anomaly function, in this research, the method of difference From mean was used. At the end, the dimension value or band index was extracted, in which a certain statistic is obtained for each pixel in a multi-dimensional or multi-band raster, and the final map of coral bleaching prediction was prepared, and then using the data and global maps of the National Oceanic Administration NOAA , it was evaluated.Results, discussion and conclusionThe preliminary results showed that the sea surface temperature has changed in the Persian Gulf. The range has experienced higher average temperatures since 1996, which could put the area at risk of coral bleaching. The minimum average temperature in the studied time period is 298.758 degrees Kelvin in 1991 and the maximum average temperature in 1399 is 300.737 degrees Kelvin. The parameters that were chosen for multidimensional data trend analysis include water surface temperature variable (SST) and time dimension. The obtained trend map (1980-2015) indicated that the northwestern regions of the Persian Gulf and a part of its south are more exposed to prolonged heat. In this study, frequency parameter 2 was used in the harmonic model, which uses the combination of the first-order linear harmonic curve and the second-order harmonic curve to fit the data. The accuracy of data trend fitting by harmonic regression function provided statistical parameters, R2=0.78 and RMSE=0.5. The value of R2 indicates that the observed value of sea surface temperature (SST) was predicted by the harmonic regression model by 78% and the rest remains undefined. This value of the determination coefficient confirmed the accuracy of the trend map. Another statistical parameter is the root mean square error, the lower the value, the better the fit. In the obtained results, the mean of this error is 0.5, which shows that the harmonic regression model can accurately predict the data. In this study, forecast data was analyzed to find locations where water temperatures remain warm for extended periods of time. In this context, first, anomalies in the data were calculated, anomaly or anomaly is the deviation of an observed value from its average value, and in the analysis, it shows areas that have a temperature higher than the average. As a result of this step, the anomalies in the data were calculated and the areas with higher temperature than the average were identified. In the predicted annual time frame (2022), the north-west and a part of the south of the Persian Gulf region will face a longer period of high temperature. To evaluate the accuracy of the results obtained from the analysis and the method used in predicting sea surface temperature and identifying anomalies (2022-09-03), they were compared with the maps of Nova organization on the same date and were confirmed. It is suggested that responsible organizations use methods based on remote sensing and trend analysis to assess the situation and prepare a risk map of coral reefs.
Ehsan Yari; Vahid Abdalipour
Abstract
Extended Abstract 1. Introduction From the ancient times, border disputes and territorial expansionism have always existed between countries and states and they have been the main factors for creation of conflicts and wars among them. The first step towards fixing boundaries was taken in Europe ...
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Extended Abstract 1. Introduction From the ancient times, border disputes and territorial expansionism have always existed between countries and states and they have been the main factors for creation of conflicts and wars among them. The first step towards fixing boundaries was taken in Europe by Westphalia treaty. Fixing boundaries and resolving border disputes in Europe were not completed even after the Second World War and continued untilthe collapse of theSoviet Union. But, in most regions of the world such as the Persian Gulf, we can observe countless conflicts in the field of territorial and border issues. These regions from the advent of its southern margin countries, have always been the scene of many conflicts and disputes, and approximately all Arab countries of this region have border disputes with each other and most of these disputes have remained stable so far. In this article, we try to answer this question that: what is the main reasonfor Arab countries' disappointment in the Persian Gulf region to settle the border disputes among themselves? 2. Research methodology The Research methodology is analytical- descriptive and library method was used in collecting the required information and data. 3. Results & Discussion 3-1.the procedure of creating region's borders The collapse of Turkish Empire and decades after that is a very important era for Middle East. What happened in these decisive decades is the apparent sovereignty of European on the region that changed and redraw the international borders and led to the advent of new countries. In the central Middle East, the intervention of European powers had the most influence on political map of the region. In the Persian Gulf, by undertaking contracts that Britain imposed on the sheikhdoms in the South coast of the Persian Gulf from the early nineteenth century, the region was completely under British rule. So, this colonial power determined the region's borders in order to gain its goals. 3-2. border- territorial disputes among Arab countries of the region The borders of this region consist of sea and land borders. In this writing, we stress specially on the land borders and then deliberate the discrepancies between them. The disputes between Saudi Arabia – Oman and Abu Dhabi about Buraimi Oasis: Buraimi Oasis includes nine villages that have a mixture of tribal descents. By using the tribal nationalities, Abu Dhabi – Oman and Saudi Arabia could claim all or a part of Buraimi Oasis. In 1955, on behalf of Abu Dhabi, Britainset up a border without Saudi approval. In 1974 United Arab Emirates (UAE) and Saudi Arabia compromised on the 1955 ridge. The border between Oman and Abu Dhabi was drawn; so that the six villages of Buraimi remained in Abu Dhabi and three villages remained in Oman. But in 2005, the border disputes between Saudi Arabia and the UAE on the Buraimi Oasis restarted again. Territorial disputes between Iraq and Kuwait: With the independence of Kuwait from Britain, Iraq has consistently claimed the sovereignty over the Sheikhdom on the basis that Kuwait was part of Basra in the Turkish era. Iraq also has some claims about Warbah and Bubiyan islands. Indeed, the most important reason for Iraq to attack Kuwait was her lack of free access of to the Persian Gulf. Another factor that had influenced Iraq policy towards Kuwait wasits access to the oil fields. The territorial disputes between Saudi Arabia and Qatar: In 1992, Saudi Arabia and Qatar had long border disagreements. Riyadh and Doha concealed their disputestemporarily by signing an agreement. In July 2008, Saudi Arabia and Qatar agreed to resolve the Khawr al Udayddisputes between the UAE, Saudi Arabia and Qatar. But, the State of the UAE besides protesting to Qatar, associated any determination of the borders in the Khawr al Udayd region to the agreement with this country. The procedure of foresaid disputes has been continued practically. Saudi Arabia tries to access the Persian Gulf's coastlines in Qatar peninsula and then access the largestin operation gas fields in the world. The territorial disputes between Saudi Arabia and Yemen: The first border agreement between Saudi Arabia and Yemen which is known as 'Taif', was signed in 1934. In 2000, Yemen signed the Jeddah agreement with Saudi Arabia and recognized Taif agreement state in order to reduce tensions and Saudi Arabia's interventions. But, the tensions between the two countries did not end by this agreement. Indeed, the disputes between the two countries include vast areas. Yemen has territorial claims on three oil rich provinces such as:Asir- Najran and Jizan currently handled by Saudi Arabia; on the other side, the territorial claims of Saudi Arabia on Yemen are broader and include the oil rich province of Hadhramautin Yemen which has strategic importance due to its location near the Indian ocean. The territorial disputes between Saudi Arabia and Kuwait: The disputes between Kuwait and Saudi Arabia dates back to the early twentieth century and the claims of Ibn Saud on Kuwait. The last border agreement between Saudi Arabia and Kuwait took place in 2000. Iran and Iraq are opposed to this agreement. Iran protests to this agreement because this agreement virtually violated the agreement of Iran and England (Arab's foreign policy officer) in 1965. Also, by regarding the agreement of Kuwait and Saudi Arabia on commonly use of stratum and substratum resources on the two sides of the border, Saudi Arabia practically enters to the shared oil and gas resources between Kuwait and Iran. The disputes between Saudi Arabia and Iraq: In January 1991, Western allied forces led by the US, attacked Iraq from the Northeast of Saudi Arabia. Iraq canceled all its international agreements with Saudi Arabia signed since 1968. This action included the border agreements of 1975 and 1981. In the summer of 1991,Saudi Arabia submitted all its border treatydocuments with Iraq to the United Nations. While Saudi is not willing to settle its border disputes with its neighbors because of its land claims on the Persian Gulf's sheikhdoms due to its territorial expansionism, the fear of Saddam Hossein made Saudis to recognize the past treaties. The disputes between Qatar and Bahrain: Mutual claims of Bahrain and Qatar over the possession of Hawarislands is the greatest dispute that put the two States on the threshold of a perfect war in 1986. Finally the issue was referred to the International Court of Justice. The court eventually gave its verdict on the territorial disputes between the two States in 2001. But, border disputes was heated upagain in 2010. In this dispute although territorial expansionism trends between the two neighbors towards some parts of each other's soil were clear, the strategic situation of tourist islands of Hawar that have oil resources, have had the most influence in creation of disputes between the two States. 4. Conclusion The border and territorial disputes in the Persian Gulf are being seenin a high level. The presence of European colonialists especially the British that handled the region from the early nineteenth century and appointed all the borders of the region in line with their imperialist benefits, has a great influence on the creation of these disputes. After 1971 when Britain left the Persian Gulf, border and territorial disputes among the region's states started and led to numerous conflicts. Most of these disputes have remained up to now. There are some factors that impede consensus among the countries of the region to form an eventual and stable solution for settling the border disputes. But, the reason for this article is stressing on the two important and effective factors in this context one of which is expansionism trend among the Arab countries in the Persian Gulf's zone and the other is the strategic situation of the conflict areas in terms of oil discovery and military situations. Saudi Arabia and Iraq and partly less, other sheikhdoms are the objective examples in this field. So, aggression of Saudi Arabia against Yemen and occupation of Asir area, military aggression against Abu Dhabi and Oman and occupation of Buraimi area, transgression against Qatar and occupation of the southern part of this State and its territorial greed towards Kuwait are arisen from this policy. Although Saudi Arabia prefers to actualize its policy by regional convergence, but in several cases, using vigor and military force shows its powerful expansionism leanings. Iraq's aggression against its neighbors in the Saddam era can also be evaluated in the form of Baghdad's expansionism policies because of queering in geopolitical – strategic straits and economic profits such as seizing the oil income of Kuwait and Iran's Khuzestan. These two factors with low and high intensity can be generalized to the otherPersian Gulf's sheikhdoms.
Mohammad jokar; Kamran Lari
Abstract
Abstract
Tidal field data is very important in coastal engineering researches such as developing the beaches, calibration of Numerical hydrodynamic models, hydrography, sediment transport and other things.The aim of this study is to evaluate and validate numerical hydrodynamic modeling by using field ...
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Abstract
Tidal field data is very important in coastal engineering researches such as developing the beaches, calibration of Numerical hydrodynamic models, hydrography, sediment transport and other things.The aim of this study is to evaluate and validate numerical hydrodynamic modeling by using field measurements of tidal measuring stations and to find a level tidal model in the Persian Gul. Therefore, bathymetry and coastline data and one year data of ten tidal measuring stations in the Persian Gulf and the wind field GFS were used for this purpose.Tidal currents were simulated using FM[1] software MIKE21 with irregular mesh structure and considering the astronomical forces, and verified by the results of the station measurements. In the next step, the tidal components were extracted. The simulation of the Persian Gulf's tidal current with the MIKE model was very well adapted to the field data of the tide measuring stations.In the final stage, the values provided by the FES global model were extracted using Matlab software. The results of the tidal analysis derived from the global oceanic tide model were evaluated and compared with the results of the tidal analysis derived from the modeling (results from the tide measuring stations). Based on the results in the study area, the tidal components obtained from the global oceanic tide model in the coastal and shallow zones, showed a low correspondence and accuracy with the tidal components of the tide measuring stations. This is despite the fact that less difference was observed between the corresponding components in deep areas.
1- Flow Model
Mehrab Hadavand Mirzaei; Azita Rajabi
Abstract
There are about 90 large and small islands in the Persian Gulf, of which 34 belong to Iran. Of these, 17 islands have geopolitical and strategic importance in terms of sovereignty overthe international waterway of Strait of Hormuz and its control,as well as controlling of the foreign fleet traffic. The ...
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There are about 90 large and small islands in the Persian Gulf, of which 34 belong to Iran. Of these, 17 islands have geopolitical and strategic importance in terms of sovereignty overthe international waterway of Strait of Hormuz and its control,as well as controlling of the foreign fleet traffic. The Farsi Island located at the center of the Persian Gulf,atlatitude 27° 59' 36" N and longitude 50° 10' 22" E,is the farthest Iranian island to the mainland,and Arabi Island (Arabic Island) of Saudi Arabia is the nearest island to it.In addition to its politicaland economic importance (having rich oil and gas resources) and its position of maritime tourism, the island is of military importance. The geographical location of the Farsi Island has forced the Fifth Fleet of the United States, based in Bahrain, to inevitably passbetweenFarsi and Abu Musa Islands. Furthermore, due to its location in the Persian Gulf, the Farsi Island plays an important role in controlling the traffic route of the ships to the western and southwestern regions of the Persian Gulf. Farsi Island provided Iran with a good position during the Tanker Warto strike back outside the Strait of Hormuz.The aim of this research is to become more familiar with Farsi Island and its importance. The island is one of the most unknown islands in the Persian Gulf and there are few sources in this area. The results of the research show that the island is strategically important in terms of political, economic, military, and its location at the international shipping route in the Persian Gulf. The information was collected through interviews and library resources, and the methodology has a descriptive - analytical nature. Photoshop software was also used to prepare the maps. The island is strategically important due to its location at the shipping route.
Sohrab Asgari; Farzaneh Sadeghi; Zahra Khanmohammadi
Volume 23, Issue 89 , May 2014, , Pages 17-25
Abstract
The Persian Gulf consists of 8 coastal countries and a water body of 240000 km. Coastal countries do not have the same access to this body of water which has caused some problems with dangerous environmental consequences. Persian Gulf (formerly known as Persian Sea) has specific natural and environmental ...
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The Persian Gulf consists of 8 coastal countries and a water body of 240000 km. Coastal countries do not have the same access to this body of water which has caused some problems with dangerous environmental consequences. Persian Gulf (formerly known as Persian Sea) has specific natural and environmental situations and is thus very different from other seas and water bodies. Because of these differences, United Nation environment office ratified Kuwait convention, so that coastal countries act more sensitively in preserving Persian Gulf environment. In recent decades, Persian Gulf environment has faced many losses and damages due to inappropriate human activities. Because of these devastating activities, the unique ecosystem of this sea is being destroyed. The destructions are quite widespread and includes different activities. Some countries have transformed their sea coasts and thus increased environmental devastation of the sea. The present article has endeavor to investigate Persian Gulf’s natural and environmental situation, while reviewing its position in the United Nation convention on Law of the Sea (1982) analytically and scientifically. It also mentions the coastal countries responsibilities in maintaining this sea.
Bahman Ramezani Gourabi
Volume 20, Issue 78 , August 2011, , Pages 59-65
Abstract
Marginal areas and islands of the Persian Gulf are located in a warm and humid climate with high absolute humidity; areas with an unfavorable climate among whose characteristics are minimum precipitation and water shortage, abundant water vapor, low relative humidity, high radiation levels , Dust, … ...
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Marginal areas and islands of the Persian Gulf are located in a warm and humid climate with high absolute humidity; areas with an unfavorable climate among whose characteristics are minimum precipitation and water shortage, abundant water vapor, low relative humidity, high radiation levels , Dust, … , which, considering urban development plans and the creation of new towns and industrial areas associated with increase in population, are of great importance in terms of energy costs in an unfavorable climate. In the past, indigenous people provided more or less tolerable conditions due to the presence of Hara forest vegetation and the use of indigenous techniques against undesirable climate. However, due to new structural changes, this approach is accompanied by the Increasing cost of energy over the year. The purpose of this paper is to identify the potential of creating desirable climatic conditions in Hara forests in the Persian Gulf, with an emphasis on reducing energy costs. The method of research is descriptive-analytical, using existing statistics of meteorology and application of bioclimatic human models. This article tries to introduce the development and understanding of these forests as one of the ways to create the optimal local and regional climate in the Persian Gulf region for the desirable human development, so that vegetation is preserved in the UAE in the southern region of Persian Gulf with great costs, while in the northern regions of the Persian Gulf (Iranian section), this potential can be developed at the lowest cost in the margins and islands, in which terms it is incomparable with the south.
Sohrab Askari
Volume 20, Issue 78 , August 2011, , Pages 107-113
Abstract
Persian Gulf has belonged to Iran since the dawn of history. The presence of Iranians in this aquatic zone is a historical and geographical fact. In some periods of history, the Persian Gulf was considered as amongst inland waters. The lawful presence of Iran in the Persian Gulf dates back to the year ...
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Persian Gulf has belonged to Iran since the dawn of history. The presence of Iranians in this aquatic zone is a historical and geographical fact. In some periods of history, the Persian Gulf was considered as amongst inland waters. The lawful presence of Iran in the Persian Gulf dates back to the year 1923. At that time, despite the opposition of major powers such as Britain and the United States, attempts were made to make the presence of Iranian navy in the Persian Gulf and the Oman Sea organized. By adopting the law of determining the extent of the coastal waters and the area of state control in the seas, on July 15, 1934, Iran's actions became operational. In the year 1956, the oil law was ratified and exploration operations began in the territories of Iran. Iraq, without specifying its maritime territory, claimed that Iran's operations had entered the territory of that country. It went on to take unilateral measures to determine the scope of his maritime area, which faced Iran’s non-acceptance. Over the past five decades, the land and border issues and political differences between Iran and Iraq have been effective in the lack of sea division between the two countries. The geographic position of the coasts of Iran and Iraq relative to each other and the exact location of the Tripartite Point, which is the crossing point of the maritime borders of Iran, Iraq and Kuwait, will have a great influence on the future border-determination process of the two countries. Currently, Iran's sea border with Iraq is under the influence of issues such as the re-signing of Algeria treaty in 1975, marking the borders with bars, the dredging of the Shatt al-Arab River (Arvandroud), the payment of war damage inflicted by Iraq, and so on. This article, while explaining the above-mentioned issues, tries to explain the necessity of settling the Iranian sea border with Iraq.
Sohrab Askari
Volume 17, Issue 68 , February 2008, , Pages 45-51
Abstract
The Persian Gulf is a semi-closed sea with eight countries on its borders. Iran has the maximum length of coast and it can be said that more than half of the Persian Gulf coast belongs to our country. This beautiful aquatic zone has special natural and political conditions. The Persian Gulf has an aquatic ...
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The Persian Gulf is a semi-closed sea with eight countries on its borders. Iran has the maximum length of coast and it can be said that more than half of the Persian Gulf coast belongs to our country. This beautiful aquatic zone has special natural and political conditions. The Persian Gulf has an aquatic relationship with the Indian Ocean through the Strait of Hormuz and the Oman Sea. The Persian Gulf bed is considered as totally continental shelf, which, according to the excavations, has huge hydrocarbon resources, a significant portion of which is discovered and is being extracted. The Persian Gulf states contain the largest reservoir of the world's energy resources. More than 65 percent of the world's oil and more than 38 percent of the world's gas belongs to this geopolitical area. Currently, more than 28 percent of the world's oil is currently supplied from this region. Considering the depletion of oil in other parts of the world, the importance of Persian Gulf oil will increase and its contribution to future world oil production will rise. More than 80 percent of the oil produced in the Gulf region is carried by giant oil tankers and through this aquatic area. The environment of the Persian Gulf is being destroyed by this state of affairs. There are other issues, such as change of beach physics, releasing urban and industrial sewage and removing sand which intensify the environmental degradation of the sea. Southern coastal countries are making changes in the coasts irrespective of the natural conditions of the Persian Gulf, causing further contamination as well as legal problems in the future. The expansion of the phenomenon of urbanization and population growth also cause more environmental problems for the Persian Gulf. This paper tries to describe the factors affecting the environment while describing the geographical situation of the Persian Gulf.
Alireza Azmoudeh Ardalan; Abdol Hossein Hajizadeh
Volume 16, Issue 64 , February 2008, , Pages 49-53
Abstract
In this paper, different methods of determining submarine position including LBL, SBL, USBL, GIB and a combination of them are presented and their advantages, disadvantages and applications of each are separately presented. Next, the proper system is presented according to the environmental conditions ...
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In this paper, different methods of determining submarine position including LBL, SBL, USBL, GIB and a combination of them are presented and their advantages, disadvantages and applications of each are separately presented. Next, the proper system is presented according to the environmental conditions of the area such as depth, topography, disturbing noises, etc., and finally, according to the fact that Iran is connected to the strategic waters of the Oman Sea and the Persian Gulf on the south, a suitable system for each of them is provided.
