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Archive for Dust Storms

Dust Blowing Across Thar Desert in Pakistan

24.7N 68.0E

November 28th, 2009 Category: Dust Storms, Rivers

Pakistan - November 15th, 2009

Pakistan - November 15th, 2009

Dust blows over eastern Pakistan, blowing from the northeast towards the Arabian Sea. The dust is blowing across the Thar Desert, also known as the Great Indian Desert, a large, arid region in the northwestern part of the Indian subcontinent.

Visible west of the dust and Thar Desert is the Indus River and Valley. Continuing west of this fertile green area, the brown and tan grooves of the Balochistan Plateau can also be seen.

To the south, near the coast, the Rann of Kutch appears as a bright white area. It is a seasonally marshy saline clay desert located in the Thar Desert biogeographic province  by the Surendranagar District of northwestern India and the Sind province of Pakistan.  Below this area, tan sediments spill into the Gulf of Kutch and the Arabian Sea.

Dust in the Sahara Desert Near the Tibesti Mountains in Chad

November 19th, 2009 Category: Dust Storms

Sahara Desert - November 16th, 2009

Sahara Desert - November 16th, 2009

The Sahara is the world’s largest hot desert. At over 9,000,000 square kilometres (3,500,000 sq mi), it covers most of Northern Africa, including huge parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan and Tunisia. The area visible here includes southern Libya (upper left), northern Chad (lower left), southern Egypt (top right) and northern Sudan (bottom right).

The desert landforms of the Sahara are shaped by wind or by occasional rains, and include sand dunes and dune fields or sand seas, stone plateaus, gravel plains, dry valleys and salt flats. Several deeply dissected mountains and mountain ranges rise from the desert, many of which are volcanic, including the Tibesti Mountains, identifiable here as a brown area along the left edge.

The Tibesti Mountains are a group of dormant volcanoes forming a mountain range in the central Sahara desert in the Bourkou-Ennedi-Tibesti Region of northern Chad. The northern slopes extend a short distance into southern Libya. Here, some whitish colored dust can be seen blowing to the southwest, below the mountain range.

Dust and Phytoplankton off Coast of Argentina

37.9S 57.5W

November 7th, 2009 Category: Dust Storms

Dust and Phytoplankton of Argentine Coast - November 5th, 2009

Dust and Phytoplankton of Argentine Coast - November 5th, 2009

A plume of dust blows off the coast of Argentina, between Pinamar and Mar del Plata, south of Buenos Aires and the sediment-laden Rio de la Plata estuary. The plume widens as it spreads eastward, eventually forking in two off the coast. One part then curves back towards land, while the other blows southeast and then to the northwest.

Also visible is a phytoplankton bloom in the waters of the Atlantic Ocean. Part of the bloom is veiled by the dust, while more can be observed to the south. Off the coast of Argentina, the Malvinas Current travels north along the continental shelf. Its motion pulls deep, cold nutrient rich waters up to the surface. These waters act as a natural fertilizer for the production of the phytoplankton.

Dust Over Indus River Valley and Off Coast of Pakistan

24.8N 67.0E

November 7th, 2009 Category: Dust Storms, Rivers

Dust off Coast of Pakistan - November 5th, 2009

Dust off Coast of Pakistan - November 5th, 2009

Dust blows over the Indus River Valley, over Karachi, Pakistan’s largest city, and off the coast into the Indian Ocean. The dust blows towards, but doesn’t reach, the country of Oman on the lower left.

The mountains west of the Indus River, which still appears greenish through the veil of dust, prevent the particles from spreading westward, over the Iranian Plateau and into Iran.