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Archive for November 24th, 2009

Lake Namtso North of the Nyainqêntanglha Mountains, Tibet

30.7N 90.5E

November 24th, 2009 Category: Lakes

Tibet, China - November 15th, 2009

Tibet, China - November 15th, 2009

North of the Himalayas, the lakes of Tibet’s fittingly named “Lakes Region” appear in various shapes and sizes. The two largest lakes visible here on the Tibetan Plateau are Siling Co (left) and Namtso (center).

Lake Namtso or Lake Nam, meaning heavenly lake, is a mountain lake just north of the Nyenchen Tanglha, or Nyainqêntanglha, a mountain range which lies approximately 300 kilometers northwest of Lhasa in central Tibet. The mountain range has more than thirty peaks over 6,000 metres high, and four are more than 7,000 metres high.

A peculiarity of Lake Namtso is that it is the highest salt lake in the world, lying at an elevation of 4,718 m. It is also the largest salt lake in the Tibet Autonomous Region of China, although it is not the largest salt lake on the Qinghai-Tibetan Plateau.

Land Between the Lakes, in Kentucky and Tennessee, USA

37.0N 83.8W

November 24th, 2009 Category: Lakes, Rivers

USA - November 8th, 2009

USA - November 8th, 2009

While the Mississippi River winds its way down the left side of this image, a pair of other distinctive bodies of water is visible to the right. These are Kentucky Lake (left) and Lake Barkley (right). The brown land between them is part of the Land Between the Lakes National Recreation Area, in the US states of Kentucky and Tennessee.

The Tennessee and Cumberland Rivers flow very close to each other in the northwestern corner of Middle Tennessee and Western Kentucky, separated by a rather narrow and mostly low ridge.

This area where they are only a few miles apart had been known as “Between the Rivers” since at least the 1830s or 1840s. After the Cumberland River was impounded in the 1960s and a canal was constructed between the two lakes, Land Between the Lakes became the largest inland peninsula in the United States.

Downstream from this area, the courses of the rivers then diverge again, with the result being that the mouth of the Cumberland into the Ohio River is approximately 40 mi (64 km) from that of the Tennessee.

Tropical Cyclone Bongani (02S) Near Northern Madagascar

9.1S 52.0E

November 24th, 2009 Category: Tropical Storms

Tropical Cyclone Bongani - November 23rd, 2009

Tropical Cyclone Bongani - November 23rd, 2009

Track of TC 02S - November 24th, 2009 © Univ. of Wisconsin

Track of TC 02S

Enhanced image

Enhanced image

Tropical Cyclone Bongani (02S), partially visible along the right edge, is located approximately 685 nm north-northeast of Antananarivo, Madagascar (below). The system has tracked west-southwestward at 6 knots over the past six hours.

Animated infrared satellite imagery indicates increasingly disorganized deep convection, however, a recent METOP-A image depicts a partially exposed but well-defined low-level circulation center (LLCC) with convective banding over the western semi-circle.

The current intensity of 45 knots is higher than the Dvorak estimates of 35 knots based on an ASCAT image (25-km) showing 40-45 knot unflagged winds.

TC 02S is forecast to track slowly west-southwestward through TAU 48 under the steering influence of a weak low- to mid-level subtropical ridge (STR) then is forecast to accelerate more southwestward after TAU 72 as the STR strengthens and shifts east of Madagascar. The majority of the model guidance indicates the system will likely turn poleward over water, while one model suggests the system could turn poleward later, as it tracks over Mozambique.

Bongani is forecast to intensify slowly but should strengthen after TAU 48 due to improved poleward outflow. TC 02S will likely weaken after TAU 96 due to increased vertical wind shear associated with the approaching midlatitude shortwave trough. Maximum significant wave height is 12 feet.

Kuwait City and Oilfields in Kuwait – November 24th, 2009

29.3N 48.0E

November 24th, 2009 Category: Image of the day

Kuwait - November 16th, 2009

Kuwait - November 16th, 2009

Kuwait‘s capital and largest city, called Kuwait City, appears as a bright white area extending inland from the shores of the Persian Gulf in the lower part of this ASAR image.

To the north, Bubiyan Island is separated from the mainland in the northeast by the channel Khawr Abd Allah and from the mainland in the southwest by the channel Khawr as Sabiyah. The water currents can be seen flowing through the channels, around the large island and into the gulf.

West of the island, an area stands out as slightly lighter  as compared to the surrounding dark grey landscape. This area contains several oilfields, including the Ar Rawdatain Oilfield and the Sabriyah Oilfield. The white lines extending from the oilfields towards Kuwait City are paved roads.