Category Social Sciences

What makes the voyages of Pytheas of Massalia remarkable?

 

               Around 330 BC, the Greek geographer named Pytheas set out on a voyage from the Greek colony of Massalia through the Mediterranean Sea, to explore Northern Europe. He was sent out by the merchants of his native city to find a route to the tin mines of Southern Britain.

               During the journey, he circumnavigated and visited a considerable part of Great Britain. It was said that he sailed around Iberia, then up the coast of Gaul to Brittany, and eventually, reached Belerium where he explored the famous tin mines.

               Pytheas was the first person to describe the midnight sun, and polar ice. He also introduced the idea of ‘Thule’ to the geographic imagination, and his account was the earliest that stated that the Moon is the cause of tides. On his return, Pytheas chronicled an account of his endeavour entitled ‘On the Ocean’. 

Which two types of navigation methods were mastered by the Phoenicians?

 

               The Phoenicians were extremely careful and secretive about their trade routes, discoveries, and their knowledge of winds and currents. They had two types of navigation; the first one was coastal navigation, which was usually a short daytime expedition between ports that were not more than 45 to 55 kilometres apart.

               The second type of navigation was open sea navigation. This was used when the Phoenicians sailed to far-off destinations, when they cruised much farther out in open water. During such voyages, they always preferred to anchor safely during nights. When that was not possible, they would steer their ships trusting the Ursa Minor constellation.

               Ursa Minor had been important in navigation because of Polaris, a fairly bright star in the constellation, approximately 434 light years from Earth. Ancient writers called Polaris the Phoenician Star.

Who were the Phoenicians?

            The Phoenicians were mighty seafarers of the ancient world. The coastal plains of present day Lebanon were home to the Phoenicians in the first millennium BC. They traded predominantly along the Mediterranean Sea. In the centuries that followed, the Phoenicians formed the major naval power of the region. They were the first people to venture into the western Mediterranean and beyond the Straits of Gibraltar, to the Atlantic coasts of Africa and Europe.

            Gradually, the Phoenicians established colonies throughout the Mediterranean. The most strategically important Phoenician trading outpost was Carthage, in North Africa.

            The Phoenicians grew rich exporting products such as wine, olive oil, embroideries, linen, fabric coloured in the famous Tyrian purple dye, and most notably, timber from the famous cedars of Lebanon.

INTRODUCTION – WEATHER

An understanding of the weather is often vital to daily life – framers, for example, require information about the weather to try and protect their crops. Extremes of weather can ruin entire crops.

Sometimes even our safety depends on knowing about weather conditions. With advance warning of a major storm, ships or aeroplanes can be routed away from danger. Flood warnings can be issued and people moved to a safe area.

Farmers need to irrigate, or water, their crops if there is no rain.

Heavy rain can cause rivers to burst their banks and flood large areas of land.

THE WEATHER

When we say “The Sun is shining”, we are talking about the weather. However, when we say “It’s always sunny here”, we are talking about the climate. The climate describes the way weather behaves over many years. The climate depends on many factors, including how far from the equator a place is. Weather is caused by changes in the ‘atmosphere’ – the layer of air surrounding the Earth.

Generally, weather and climate are caused by parts of the world becoming warmer than others when the Sun’s rays heat the Earth’s surface. These differences in temperature make the air move and these air movements cause the different types of weather we know.

The changing weather – hot, sunny conditions in summer heavy snow in winter. Some parts of the world get hurricanes – very strong winds.

THE WIND

Winds carry warm and cold air around the world. Knowing which way the wind is blowing is a useful guide to the type of weather we can expect. Around the world, there are many differences in temperature. Air in contact with hot land or sea is warmed. As warm air is lighter than cooler air, it rises. Cooler air then moves in to take its place. This movement of air is what we call wind.

Winds can be extremely powerful; they can knock down trees, and can push along boats fitted with sails. The map shows the routes of the main winds across the globe. These routes were once followed by sailing ships carrying their cargoes around the world.

 

Sea breezes

As the Sun shines, air over the land is heated more than air over the sea, and this hot air rises. Cooler air from over the sea moves in to take its place.

The hot air cools as it rises, but it does not fall straight back down. Instead, it spreads out over the sea and falls down there. This circular air current causes an onshore breeze.

 

 

 

 

The map shows the major winds of the world.

 

 

 

 

 

 

 

 

 

Yachts with the wind in their sails