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Posts tagged Bering Sea

Mount Aniakchak and Ugashik Bay, Alaska, USA

57.5N 157.6W

September 17th, 2009 Category: Rivers, Volcanoes

Alaska, USA - August 30th, 2009

Alaska, USA - August 30th, 2009

This orthorectified image stretches from Ugashik Bay (above) to the 10km wide caldera of Mount Aniakchak (below). The volcano is located in the Aleutian Range of Alaska, USA, visible along the eastern coast here.

Ugashik Bay is a bay of the Bering Sea in Alaska. It is an elongated, comma-shaped estuary formed where the Ugashik River empties into Bristol Bay, on the western coast of the Alaska Peninsula.

Its waters are characteristically turbid and turbulent, the result of muddy feeder streams, frequent winds, and very high tides. Some Bristol Bay tides are thought to rank eighth highest in the world, and Ugashik Bay is greatly influenced by this tidal action.

The bay is bordered on the north by a sand beach stretching from Smoky Point on the west to the wide mouth of Dago Creek, on the east by a mud-and-sand shoreline running nearly true north-south past the village of Pilot Point to Muddy Point.

The southern shore is a shifting series of mud-and-sand ridges, the northernmost and most prominent of which is called South Spit.

Bering Strait Clear of Ice as Summer Begins in the Northern Hemisphere

65.7N 167.8W

June 30th, 2009 Category: Snapshots

Bering Strait - June 24th, 2009

Bering Strait - June 24th, 2009

The Bering Strait, approximately 53 miles (85 km) wide, separates Russia’s Chukotka Autonomous Okrug from Alaska, USA. It connects the Arctic and Pacific Oceans by joining the Chukchi Sea (part of the former) and the Bering Sea (part of the latter).

Much of the snow that was covering the Russian and Alaskan terrain about six weeks ago (click here for previous article) has melted. Also, the strait is now clear of icebergs from melting sea ice.

Bristol Bay and the Cook Inlet, Alaska

58.7N 156.7W

June 15th, 2009 Category: Lakes, Rivers

Alaska, USA - June 7th, 2009

Alaska, USA - June 7th, 2009

The Cook Inlet, far right, stretches 290 km (180 mi) from the Gulf of Alaska to Anchorage in south-central Alaska. Its watershed covers about 100,000 km² of southern Alaska.

The inlet is bordered on the east by the Aleutian Range, whose peaks are still snow-capped, and to the north by the Alaska River.

Several lakes are located in and near these mountains; the most visible are Becharof Lake (below) and Lake Iliamna (above). The former is located in the Aleutian Range; the latter at the northern end of the Alaskan Peninsula.

Lake Iliamna is the largest lake in Alaska. Through the Kvichak River, its waters drain into Bristol Bay, bottom center.

Bristol Bay is the eastern-most arm of the Bering Sea, about 400 km (250 mi) long and 290 km (180 mi) wide at its mouth.

The upper reaches of Bristol Bay experience some of the highest tides in the world. One such reach, the Nushagak Bay near Dillingham and another near Naknek in Kvichak Bay have tidal extremes in excess of 30 feet (9.9 m), ranking them as eighth highest in the world.

This, coupled with the extreme number of shoals, sandbars and shallows, makes navigation troublesome, especially during the area’s frequently strong winds.

Sediments pouring into Bristol Bay give its coastal waters a yellowish tinge, while those draining into the Cook Inlet are darker brown. The two lakes mentioned, on the other hand, appear dark blue and free of silt.

The Bering Strait between Russia and the USA

May 14th, 2009 Category: Snapshots

Bering Strait - May 11th, 2009

Bering Strait - May 11th, 2009

The Bering Strait is a sea strait between Cape Dezhnev in Russia‘s Chukotka Autonomous Okrug, the easternmost point of the Asian continent, and Cape Prince of Wales, Alaska, USA, the westernmost point of the North American continent.

Here, the land on the Russian side is still mostly covered by snow, while that on the Alaskan side is beginning to thaw further inland.

The Bering Strait is approximately 53 miles (85 km) wide, with an average depth of 30–50 meters (98–160 ft). It connects the Chukchi Sea (part of the Arctic Ocean) in the north with the Bering Sea (part of the Pacific Ocean) in the south.

Icebergs from melting sea ice can be seen floating in the waters in and around the strait. With a latitude of about 65° 40′ north, the strait lies slightly south of the polar circle.

Cloud Streets Above Bering Sea

March 30th, 2009 Category: Snapshots

Clouds below Bering Strait - March 24th, 2009

Clouds below Bering Strait - March 24th, 2009

Cloud streets are rows of cumulus or cumulus-type clouds aligned parallel to the low-level wind. Here, many are visible above the Bering Sea, between Russia and Alaska.

The most favorable conditions for their formation occur when the lowermost layer of air is unstable, but is capped by an inversion-by a stable layer of air.

This often occurs when upper air is subsiding, such as under anticyclonic conditions, and is also frequently found when radiation fog has formed overnight.

Convection occurs below the inversion, with air rising in thermals below the clouds and sinking in the air between the streets.