Art. VII.—Notes on Persian Belúchistán. From the Persian of Mirza Mehdy Khán. Published Teheran, July, 1875

1876 ◽  
Vol 9 (1) ◽  
pp. 147-154
Author(s):  
A. H. Schindler
Keyword(s):  
Indian Ocean ◽  
Temperate Climate ◽  
The South ◽  
The West ◽  
The North ◽  
The People ◽  
The Indian Ocean ◽  
The Hill ◽  
Cool Climate

The part of Belúchistán now under Persian rule is bounded upon the north by Seistán, upon the east by Panjgúr and Kej, upon the south by the Indian Ocean, and upon the west by Núrámshír, Rúdbár, and the Báshákerd mountains.This country enjoys a variety of climates; almost unbearable heat exists on the Mekrán coast, we find a temperate climate on the hill slopes and on the slightly raised plains as at Duzek and Bampúr, and a cool climate in the mountainous districts Serhad and Bazmán. The heat at Jálq is said to be so intense in summer that the gazelles lie down exhausted in the plains, and let themselves be taken by the people without any trouble.

scholarly journals Art. XXVII.—Notes on Malayalam Literature

1900 ◽  
Vol 32 (4) ◽  
pp. 763-768
Author(s):  
T. K. Krishṇa Menon
Keyword(s):  
Indian Ocean ◽  
Arabian Sea ◽  
The South ◽  
The West ◽  
The Third ◽  
The North ◽  
South West ◽  
The Indian Ocean

Malayalam is the language of the south-west of the Madras Presidency. It is the third most important language of the Presidency, the first and the second being Tamil and Telugu respectively. It is spoken in Malabar, Cochin, and Travancore. Out of a total of 5,932,207 inhabitants of these parts, 5,409,350 persons are those who speak Malayalam. These countries, taken as a whole, are bounded on the north, by South Canara, on the east by the far-famed Malaya range of mountains, on the south by the Indian Ocean, and on the west by the Arabian Sea.

scholarly journals The Geology of Portuguese Nyasaland

1922 ◽  
Vol 59 (5) ◽  
pp. 200-212
Author(s):  
Robert R. Walls
Keyword(s):  
Indian Ocean ◽  
East Africa ◽  
The South ◽  
The North ◽  
Dark Continent ◽  
The Indian Ocean

Portuguese Nyasaland is the name given to the most northern part of Portuguese East Africa, lying between Lake Nyasa and the Indian Ocean. It is separated from the Tanganyika territory in the north by the River Rovuma and from the Portuguese province of Mozambique in the south by the River Lurio. The territory measures about 400 miles from east to west and 200 miles from north to south and has an area of nearly 90,000 square miles. This territory is now perhaps the least known part of the once Dark Continent, but while the writer was actually engaged in the exploration of this country in 1920–1, the Naval Intelligence Division of the British Admiralty published two handbooks, the Manual of Portuguese East Africa and the Handbook of Portuguese Nyasaland, which with their extensive bibliographies contained practically everything that was known of that country up to that date (1920). These handbooks make it unnecessary in this paper to give detailed accounts of the work of previous explorers.

scholarly journals La decisión de Elcano.

2021 ◽  
Author(s):  
Daniel Zulaika
Keyword(s):  
Indian Ocean ◽  
North Indian Ocean ◽  
The South ◽  
The West ◽  
Cape Of Good Hope ◽  
The North ◽  
The World ◽  
South Sea

La decisión de regresar de las Molucas hacia occidente fue lo que convirtió la expedición a la Especiería en la que dio la primera vuelta al mundo. Volver por el cabo de Buena Esperanza contravenía las órdenes recibidas por los expedicionarios porque invadía el territorio portugués que establecía el tratado de Tordesillas. Tres fueron las principales motivaciones: a) partir cuanto antes hacia Sevilla para informar que habían descubierto un paso al mar del Sur y que era posible llegar a las Molucas por territorio castellano; b) evitar ser apresados por los portugueses, y c) el monzón que soplaba en ese momento del NE, dificultándoles el regreso por América y por el Indico norte. El regreso por el oeste se acordó por todos expedicionarios pero la decisión de Elcano fue determinante para volver por esta ruta, arrostrar las penalidades que sufrieron y dar la vuelta al mundo. The decision to return from the Moluccas to the west was what turned the expedition to the Spice into the first trip around the world. Returning through the Cape of Good Hope contravened the orders received by the expedition members because they invaded the Portuguese territory established by the Treaty of Tordesillas. The main motivations were three: a) to leave as soon as possible to Seville to report that they had discovered a passage to the South Sea and that it was possible to reach the Moluccas through Castilian territory; b) avoid being captured by the Portuguese, and c) the monsoon that was blowing at that time from the NE, making it difficult for them to return through America and the North Indian Ocean. The return to the west was agreed by all expedition members but Elcano's decision was decisive to return along this route, face the hardships they suffered and go around the world.

Predictability of Indian Ocean Dipole (IOD)

2016 ◽  
Author(s):  
Jing-Jia Luo
Keyword(s):  
Indian Ocean ◽  
El Niño ◽  
El Nino ◽  
Tropical Indian Ocean ◽  
The West ◽  
The North ◽  
The Pacific ◽  
Westerly Winds ◽  
Ocean Atmosphere ◽  
The Indian Ocean

This is an advance summary of a forthcoming article in the Oxford Research Encyclopedia of Climate Science. Please check back later for the full article. The tropical Indian Ocean is unique in several aspects. Unlike the Pacific and the Atlantic Oceans, the Indian Ocean is bounded to the north by a large landmass, the Eurasian continent. The large thermal heat contrast between the ocean in the south and the land in the north induces the world’s strongest monsoon systems in South and East Asia, in response to the seasonal migration of solar radiation. The strong and seasonally reversing surface winds generate large seasonal variations in ocean currents and basin-wide meridional heat transport across the equator. In contrast to the tropical Pacific and the Atlantic, where easterly trade winds prevail throughout the year, westerly winds (albeit with a relatively weak magnitude) blow along the equatorial Indian Ocean, particularly during the boreal spring and autumn seasons, generating the semi-annual Yoshida-Wyrtki eastward equatorial ocean currents. As a consequence of the lack of equatorial upwelling, the tropical Indian Ocean occupies the largest portion of the warm water pool (with Sea Surface Temperature [SST] being greater than 28 °C) on Earth. The massive warm water provides a huge potential energy available for deep convections that significantly affect the weather-climate over the globe. It is therefore of vital importance to discover and understand climate variabilities in the Indian Ocean and to further develop a capability to correctly predict the seasonal departures of the warm waters and their global teleconnections. The Indian Ocean Dipole (IOD) is the one of the recently discovered climate variables in the tropical Indian Ocean. During the development of the super El Niño in 1997, the climatological zonal SST gradient along the equator was much reduced (with strong cold SST anomalies in the east and warm anomalies in the west). The surface westerly winds switched to easterlies, and the ocean thermocline became shallow in the east and deep in the west. These features are reminiscent of what are observed during El Niño years in the Pacific, representing a typical coupled process between the ocean and the atmosphere. The IOD event in 1997 contributed significantly to floods in eastern Africa and severe droughts and bushfires in Indonesia and southeastern Australia. Since the discovery of the 1997 IOD event, extensive efforts have been made to lead the rapid progress in understanding the air-sea coupled climate variabilities in the Indian Ocean; and many approaches, including simple statistical models and comprehensive ocean-atmosphere coupled models, have been developed to simulate and predict the Indian Ocean climate. Essential to the discussion are the ocean-atmosphere dynamics underpinning the seasonal predictability of the IOD, critical factors that limit the IOD predictability (inter-comparison with El Niño-Southern Oscillation [ENSO]), observations and initialization approaches that provide realistic initial conditions for IOD predictions, models and approaches that have been developed to simulate and predict the IOD, the influence of global warming on the IOD predictability, impacts of IOD-ENSO interactions on the IOD predictability, and the current status and perspectives of the IOD prediction at seasonal to multi-annual timescales.

Source regions of oxygen maxima in intermediate depths of the Arabian Sea.

1966 ◽  
Vol 17 (1) ◽  
pp. 1 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Indian Ocean ◽  
Arabian Sea ◽  
Structural Features ◽  
The South ◽  
The North ◽  
Source Regions ◽  
South Indian ◽  
Indian Central ◽  
South West Monsoon ◽  
The Indian Ocean

Oxygen maxima, in relation to σt salinity maxima and minima, and other hydrological structural features, have been examined along three meridional sections of the Indian Ocean. These relations have provided a background for the interpretation of the water mass sources of oxygen maxima of the whole Indian Ocean. After grouping these oxygen maxima according to density, their salinities have been used to identify mixing circuits in which the following waters are involved: from the south (1) South Indian Central, (2) Subtropical oxygen maximum, (3) Antarctic Intermediate; from the east (4) Equatorial Frontal water; and from the north (5) Persian Gulf, and (6) Red Sea. The principal routes whereby oxygen-rich mixtures of these waters enter the Arabian Sea, during the south-west monsoon, have been determined. The directions of flow along several of these routes agreed with measured directions of current flow. Where these currents disagreed the measured current was generally very weak.

Anthropogenic iron deposition alters the ecosystem and carbon balance of the Indian Ocean over a centennial timescale

2020 ◽  
Author(s):  
Anh Pham ◽  
Takamitsu Ito
Keyword(s):  
Indian Ocean ◽  
Arabian Sea ◽  
Ocean Basin ◽  
Ecosystem Dynamics ◽  
Carbon Uptake ◽  
The South ◽  
Nutrient Deposition ◽  
The North ◽  
The Indian Ocean ◽  
The Impact

<p>Phytoplankton growth in the Indian Ocean is generally limited by macronutrients (nitrogen: N and phosphorus: P) in the north and by micronutrient (iron: Fe) in the south. Increasing anthropogenic atmospheric deposition of N and dissolved Fe (dFe) into the ocean can thus lead to significant responses from marine ecosystems in this ocean basin. Previous modeling studies investigated the impacts of anthropogenic nutrient deposition on the ocean, but their results are uncertain due to incomplete representations of Fe cycling. We use a state-of-the-art ocean ecosystem and Fe cycling model to evaluate the transient responses of ocean productivity and carbon uptake in the Indian Ocean, focusing on the centennial time scale. The model incorporates all major external sources and represents a complicated internal cycling process of Fe, thus showing significant improvements in reproducing observations. Sensitivity simulations show that after a century of anthropogenic deposition, increased dFe stimulates diatoms productivity in the southern Indian Ocean poleward of 50⁰S and the southeastern tropics. Diatoms production weakens in the south of the Arabian Sea due to the P limitation, and diatoms are outcompeted there by coccolithophores and picoplankton, which have a lower P demand. These changes in diatoms and coccolithophores productions alter the balance between the organic and carbonate pumps in the Indian Ocean, increasing the carbon uptake in the south of 50⁰S and the southeastern tropics while decreasing it in the Arabian Sea. Our results reveal the important role of ecosystem dynamics in controlling the sensitivity of carbon fluxes in the Indian Ocean under the impact of anthropogenic nutrient deposition over a centennial timescale.</p>

Role of friction and orography in the Asian-African monsoonal system

2020 ◽  
Author(s):  
Giovanni Dalu ◽  
Marco Gaetani ◽  
Cyrille Flamant ◽  
Marina Baldi
Keyword(s):  
Indian Ocean ◽  
West African Monsoon ◽  
Tropical Indian Ocean ◽  
Western Indian Ocean ◽  
Ekman Pumping ◽  
The South ◽  
The West ◽  
Impermeable Barrier ◽  
The Indian Ocean ◽  
Marine Air

<p>The West African monsoon (WAM) originates in the Gulf of Guinea when the intertropical convergence zone (ITCZ) makes its landfall; whilst, the south Asian monsoon (SAM) originates in the Indian ocean when the ITCZ crosses the equator. The monsoonal dynamics are here studied after landfall using Gill’s tropospheric model with an implanted Ekman frictional layer (EFL). Ekman pumping increases low level convergence, making the lower monsoonal cyclone deeper and more compact that the upper anticyclone, by transferring tropospheric vorticity into the EFL. In the upper troposphere, air particles spiral-out anticyclonically away from the monsoons, subsiding over the Tropical Atlantic, the Tropical Indian ocean, or transiting into the southern hemisphere across the equator. Whilst marine air particles spiral-in cyclonically towards the WAM or the SAM, the latter appears to be a preferred ending destination in the absence of orography. The Himalayas introduced as a barrier to the monsoonal winds, strengthen the tropospheric winds by tightening the isobars. The Somali mountains (SMs), introduced as a barrier to the Ekman winds, separates the WAM and the SAM catch basins; thus, the Atlantic air particles converge towards the WAM and the Indian ocean particles converge towards the SAM. The Indian Ghats (IGs), introduced as a semi-impermeable barrier to the Ekman winds, deflect the marine air particles originated in the western Indian ocean towards the south-eastern flank of the SAM. In short, an upper single anticyclone encircles both monsoons; the Himalayas strengthen the upper-level winds by increasing the pressure gradients; the SMs split the EFL cyclone, keeping the marine air particles to the west of SMs in the WAM basin and the particles to the east of SMs in the SAM basin; the IGs guides transmit the air particles, deflecting them towards Bangladesh.</p>

An Iron Age Hill-Fort at Grimthorpe, Yorkshire, England

1969 ◽  
Vol 34 ◽  
pp. 148-190 ◽  
Author(s):  
I. M. Stead ◽  
M. Jarman ◽  
Angela Fagg ◽  
E. S. Higgs ◽  
C. B. Denston
Keyword(s):  
Iron Age ◽  
The South ◽  
The West ◽  
Circular Area ◽  
North West ◽  
The North ◽  
South West ◽  
White Horse ◽  
The Hill ◽  
Grave Goods

The Iron Age hill-fort at Grimthorpe (Grid reference SE.816535) in the parish of Millington, East Riding of Yorkshire, is on the western edge of the Yorkshire Wolds, with a commanding position over the Vale of York. There is an uninterrupted view to the White Horse on the Hambleton Hills, 25 miles to the north-west; beyond York, 13 miles to the west, to the Pennines; and to the south 25 miles to the chimneys of Keadby and Scunthorpe. To the west and south the land slopes away to the Vale of York, and to the north and east there is a sharper fall to Given Dale and Whitekeld Dale. The hill-fort defences follow the 520 feet contour, and enclose an approximately circular area of eight acres (fig. 1).A traditional reference may be preserved in the field-name—Bruffs—perhaps a variation of ‘Brough’, which ‘refers in all cases to ancient camps, usually Roman ones’. But all surface indications have now been obliterated by ploughing, and even a century ago there was little more to be seen. John Phillips in 1853 noticed ‘unmistakable traces of ancient but unascertainable occupation’, and in 1871 an excavation by J. R. Mortimer located ‘the filled up inner ditch of a supposed camp’. But Mortimer was not concerned with the settlement; his interest had been aroused by the discovery, in 1868, of a burial with rich grave-goods, including metalwork with La Tène ornament, in a chalk-pit within the south-west sector of the hill-fort.

Excavations at Rams Hill, Uffington, Berks.

1940 ◽  
Vol 20 (4) ◽  
pp. 465-480 ◽  
Author(s):  
Stuart Piggott ◽  
C. M. Piggott
Keyword(s):  
The South ◽  
The West ◽  
The North ◽  
White Horse ◽  
North Edge ◽  
The Hill

Rams Hill is an inconspicuous knoll of the Berkshire Downs (Berks. O.S. 6 in. XIX, NW. and NE.) on the ridge overlooking the Vale of the White Horse. It lies within the 700-ft. contour, with the ground sloping gently to the south and falling steeply to 400 ft. on the northern escarpment. To the west, a mile away, the land rises to White Horse Hill, a bluff over 800 ft. high, crowned by the hill-fort of Uffington Castle and with the eponymous turf-cut Horse on the westward slope slightly below.The Ridgeway runs along the crest of the downs, south of Uffington Castle but on the north edge of Rams Hill, while along the bottom of the escarpment the Ickneild Way winds in and out of the coombes between the 400- and 500-ft. contours.

Adh-Dhahabī's “Ta'rīkh al-islām” as an Authority on the Mongol Invasion of the Caliphate

1936 ◽  
Vol 68 (4) ◽  
pp. 595-604
Author(s):  
Joseph de Somogyi
Keyword(s):  
Indian Ocean ◽  
Asia Minor ◽  
The Political ◽  
The West ◽  
Political Unity ◽  
The People ◽  
Abbasid Caliphate ◽  
The Indian Ocean ◽  
State Of Affairs ◽  
The Ganges

Scarcely ever has Islām experienced more tragical times and more hardships than during the Mongol invasion in the course of the thirteenth century a.d. With the despite of the nomads, practitioners of the open-air life, for sedentary occupations, the people of Jengis Khān turned against and mercilessly destroyed the towns and works of civilization everywhere. Their disastrous campaign was only facilitated by the decomposition of the political unity of Islām at that time. In Baghdād the 'Abbāsid caliphate still subsisted, but its splendour was on the wane; to the west of Baghdād, in Egypt, Palestine, and a part of Syria, the Ayyūbids reigned, and in Asia Minor the Seljūqs, while to the east of Baghdād the Turkish princes from Khiva had, a rather insecure hold on the vast stretch of the Khwārizmian empire from the Ganges to the Tigris and from Turkestān to the Indian Ocean. This state of affairs was inviting to an enterprising invader of the sort of Jengis Khān who, in 1218, crushed the Khwārizmian empire, while his grandson, Hūlāghū Khān, put an end to the 'Abbāsid caliphate in 1258. The western provinces of Islām, including Egypt, were, however, spared from the devastating fury of the Mongols by the Mamlūk Sulṭān's victory over Ketbogha, Hūlāghū's general, at 'Ayn Jālūt, Palestine, in 1260. When in 1299–1301 his grandson Qāzān failed in conquering Syria Islām was definitely safe from further Mongol attacks.

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