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Archive for October, 2009

Agriculture Around the Esla and Óbrigo Rivers, Spain – October 30th, 2009

42.0N 5.6W

October 30th, 2009 Category: Image of the day, Rivers

Spain - September 24th, 2009

Spain - September 24th, 2009

Rivers flowing down from the Cantabrian Mountains in Spain’s Province of León are flanked by bright green agricultural areas. The two principal rivers visible are the Óbrigo (left) and the Esla (right), which converge below Benavente.

The Esla River is a tributary of the Duero River which starts in the Cantabrian Mountains and is 286 km in length, crossing from north to south the provinces of León and Zamora. It is the largest tribuary of the Duero in terms of discharge; in fact, at its mouth, it has a greater discharge than the Duero itself does at that point.

The Órbigo River, also flowing through the provinces of León and Zamora, begins at the convergence of the Luna River and the Omaña River in the town of Santiago del Molinillo. Green fields extend far eastward from its banks, almost converging with those along the banks of the Esla.

Greater Caucasus Mountains Near Russia-Georgia Border

43.4N 43.6E

October 30th, 2009 Category: Snapshots

Russia - September 6th, 2009

Russia - September 6th, 2009

The Caucasus Mountains is a mountain system in Eurasia between the Black Sea and the Caspian Sea in the Caucasus region. It is made up of two separate mountain systems: the Greater Caucasus Mountain Range and the Lesser Caucasus Mountains, which run parallel to the greater range at a distance averaging about 100 km (60 mi) south.

In this orthorectified image, some of the slopes of the Greater Caucasus Mountain Range in southern Russia, just north of the border with Georgia, can be seen. The Russian terrain here is part of the Kabardino-Balkar Republic, west, and the Republic of North Ossetia-Alania, east.

Located in the Kabardino-Balkar Republic is the highest peak in the Caucasus ranges: Mount Elbrus. This volcanic mountain rises to a height of 18,506 feet (5,642 meters) above sea level. The highest peak in the Republic of North Ossetia-Alania, on the other hand, is Mount Dzhimara at 4,780 m.

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.