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Posts tagged Celtic Sea

Phytoplankton Bloom West of Ireland

56.8N 19.5W

May 27th, 2012 Category: Phytoplankton

United Kingdom - May 25th, 2012


Smoke or haze can be observed over the Irish Sea (center), Celtic Sea (lower left quadrant) and English Channel (lower right quadrant). The skies over the United Kingdom and Ireland, however, are mostly clear, offering an unusually clean look at the area. Visible in the full image and the close-up is an elongated phytoplankton bloom in the Atlantic to the west of Ireland.

Sediments in the Bristol Channel Between Wales and Southwestern England, United Kingdom – April 9th, 2010

51.4N 3.1W

April 9th, 2010 Category: Image of the day, Rivers, Sediments

United Kingdom - March 5th, 2010

United Kingdom - March 5th, 2010

Sediments line the southern and western coasts of the United Kingdom, appearing densest where they flow out of the Bristol Channel, between Wales (above) and southwest England (below). The channel extends from the lower estuary of the River Severn to that part of the North Atlantic Ocean known as the Celtic Sea.

The geography of Wales accounts for less than a tenth of the total area of the UK, covering 20,758 square kilometres (8,010 sq mi). Wales is mostly mountainous, though South Wales is less mountainous than North and mid Wales.

The Bristol Channel, United Kingdom

51.3N 3.1W

June 2nd, 2009 Category: Snapshots

Wales and Southwestern England - May 11th, 2009

Wales and Southwestern England - May 11th, 2009

Sediments flowing from the mouth of the River Severn cloud the waters of the Bristol Channel, which extends from the lower estuary of the River Severn to that part of the North Atlantic Ocean known as the Celtic Sea. It also separates South Wales from Devon and Somerset in South West England, and is over 50 km (30 mi) at its widest point.

At low tide large parts of the channel become mud flats due to the tidal range of 15 metres (49 ft), second only to Bay of Fundy in Eastern Canada.

The Bristol Channel is an important area for wildlife, in particular waders, and has several protected areas. Development schemes have been proposed along the channel, including an airport and a tidal barrier for electricity generation, but conservation issues have so far managed to block such schemes.

Sediments from the River Severn, United Kingdom

May 2nd, 2009 Category: Rivers

United Kingdom - April 21st, 2009

United Kingdom - April 21st, 2009

Here, Wales and southwestern England are visible on a rare, cloud-free April day. The River Severn is spilling dark brown sediments towards the Celtic Sea.

The city of Cardiff, Wales, can be seen on its northern shore, and Bristol, England, on its southern shore. The Brecon Beacons mountain range can be seen in Wales, appearing as a brown area not far from the coast.

The River Severn is the longest river in Great Britain, at 220 miles (354 km). With an average discharge of 107 m³/s at Apperley, Gloucestershire, the Severn is England’s greatest river in terms of water flow, and is considered one of the ten major rivers of the United Kingdom.

The river becomes the Severn Estuary after the Second Severn Crossing between Severn Beach, South Gloucestershire and Sudbrook, Monmouthshire.

The river then discharges into the Bristol Channel which in turn discharges into the Celtic Sea and the wider Atlantic Ocean.

The Severn’s drainage basin area is 11,420 square kilometres (4,409 sq mi), excluding the River Wye and Bristol Avon which flow into the Bristol Channel. The major tributaries to the Severn are the Vyrnwy, Teme, Warwickshire Avon and Stour.

Phytoplankton off Southern Coast of Ireland

March 6th, 2009 Category: Snapshots

West coast of Ireland - March 1st, 2009

West coast of Ireland - March 1st, 2009

A large, bluish-green phytoplankton bloom can be seen off the southern coast of Ireland, in the Celtic Sea. The bloom does not reach all the way to the coast itself, as is evident from the dark blue band of water just off the shoreline.

Phytoplankton are the autotrophic (food-producing) component of the plankton community and the most common kind of life present in the world’s oceans.

Like plants, they make energy through photosynthesis, and therefore need to be close to the surface of the water in order to receive enough sunlight.

Most phytoplankton are too small to be individually seen with the unaided eye. However, when present in high enough numbers, they may appear as a green discoloration of the water due to the presence of chlorophyll within their cells (although the actual color may vary with the species of phytoplankton present due to varying levels of chlorophyll or the presence of accessory pigments).