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Archive for October 29th, 2009

Lakes Around the Solimões River in Brazil – October 29th, 2009

3.5S 63.2W

October 29th, 2009 Category: Image of the day, Lakes, Rivers

Brazil - September 29th, 2009

Brazil - September 29th, 2009

The black waters of several lakes stand out against the green rainforest canopy around the muddy brown waters of the Solimões River (Upper Amazon River), west of Manaus in the Brazilian state of Amazonas. The largest of these lakes are, clockwise from the upper right, Lake Badajós, Lake Piorini, Lake Coari and Lake Mamia. All are connected to the Amazon River.

Lake Badajós has a surface area of 246 km2 (95 mi2). It is 68 km (42 mi) long and 10km (6 mi) across at its widest part. The lake’s shoreline length is 193 km (120 mi).

Lake Piorini has a surface area of 324 km2 (125 mi2), a maximum length of 68 km (42 mi), a maximum width of 11km (7 mi), and a shoreline length of 190 km (118 mi).

The surface area of Lake Coari is 624 km2 (241 mi2). The lake has a maximum length of 77 km (48 mi) and is 10km (6 mi) across at its widest. Its shoreline is 280 km (175 mi) long, and it is directly connected to the Amazon River.

Finally, Lake Mamia has a surface area of 200 km2 (78 mi2), a maximum length of 61 km (38 mi), a maximum width of 13km (8 mi), and a shoreline length of 145 km (90 mi). It also has a direct connection to the Amazon.

The Yukon River South of the Brooks Range in Alaska, USA

66.0N 149W

October 29th, 2009 Category: Lakes, Rivers

Alaska, USA - September 6th, 2009

Alaska, USA - September 6th, 2009

The Yukon River meanders across this orthorectified image of Denali Borough in Alaska, USA, towards Canada’s Yukon Territory, to which it lends its name. Over half of the 3,700 km (2,300 mi) long river lies in the state of Alaska, making it the longest in the state. Many lakes can be seen scattered around the river.

North of the river are the foothills of the Brooks Range, a mountain range that stretches from west to east across northern Alaska and into Canada’s Yukon Territory, a total distance of about 1100 km (700 mi). The mountains top out at over 2,700 m (9,000 ft).

Typhoon Mirinae (23W) Still Moving Towards Philippines

15.7N 126.5E

October 29th, 2009 Category: Tropical Cyclones

Typhoon Mirinae - October 29th, 2009

Typhoon Mirinae - October 29th, 2009

Track of Mirinae - October 29th, 2009 © Univ. of Wisconsin

Track of Mirinae

Enhanced image

Enhanced image

Typhoon Mirinae (23W), located approximately 650 nautical miles east of Manila, Philippines, has tracked westward at 15 knots over the past six hours. Maximum significant wave height is 30 feet.

The Philippine weather bureau has placed four areas under storm signal number one as Mirinae intensified and continued moving toward Luzon, northern Philippines.

The Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA) forecast Thursday that TY 23W will make a landfall Friday night and bring heavy rains to the provinces of Isabela, Aurora, Northern Quezon and Polillo Islands.

PAGASA has advised residents in these areas, especially those living in low-lying areas and near mountain slopes, to prepare for possible flashfloods and landslides. irinae is expected to bring more rain, and have winds more powerful than Typhoon Parma (19W) which battered northern Luzon early this month.

Sediments Along Northern Coastline of Western Australia

16.8S 123.4E

October 29th, 2009 Category: Lakes, Rivers

Australia - September 24th, 2009

Australia - September 24th, 2009

Rivers along the northern coastline of Western Australia release sediments into the Indian Ocean. The sediments appear most concentrated in King Sound, east of the Dampier Peninsula near the center of the image. The sediments are released into the sound by the Fitzroy River.

West of the peninsula, moving southwest down the coast, one comes across a long stretch of white sand beaches, the most popular of which is known as Eighty Mile Beach due to its length of 80 miles (130km).

Towards the bottom of the image another white line can be seen; this is the Rudall River, which connects to the seasonal salty Lake Dora. Another lake is visible near the right edge of the image, in the upper right corner: Lake Argyle, which is the second largest artificial lake in Australia by volume.