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Posts tagged Mozambique

Lake Malawi and the Impact of Climate Change on Water Levels

12.2S 34.2E

April 23rd, 2013 Category: Climate Change, Lakes

Malawi – April 22nd, 2013

Lake Malawi (Lake Nyasa, or Lago Niassa in Mozambique), is an African Great Lake and the southernmost lake in the East African Rift system, located between Malawi, Mozambique and Tanzania. The third largest and second deepest lake in Africa, it is also the ninth largest in the world. It is reportedly the habitat of more species of fish than any other body of freshwater, including more than 1000 species of cichlids, and was officially declared a reserve by the Government of Mozambique in 2011.

Sustainable water resources development of Malawi needs a thorough assessment of the impact of climate change on the future water levels of Lake Malawi because Lake Malawi together with its outflowing Shire river water system is Malawi’s most important water resource for hydropower generation, water supply for industrial and domestic use in the city of Blantyre and its surrounding urban areas together with irrigation water in the Lower Shire Valley (LSV). Any changes in the hydrological or ecological behaviour of the lake will have far reaching consequences on the economy of Malawi.

The results of sensitivity analysis of the WBM of Lake Malawi to climate change have shown that water level will continue to drop following a decrease in the rainfall season and an increase in evaporation rates from the lake. It further shows that it is very unlikely for the water level to increase to a maximum height of 477 m amsl as was in 1980 (click here for more information).

Fires in South Africa

26.6S 30.5E

February 1st, 2013 Category: Fires

South Africa – January 24th, 2013

Fires can be seen burning in South Africa, near the border with Swaziland (center) and Mozambique (upper right). The largest plume of smoke is located just west of the Swaziland border. Most fires appear to be burning in or near the numerous nature and game reserves in the region.


Area of Convection Persisting by Mozambique Coast

17.8S 37.4E

January 27th, 2013 Category: Tropical Storms

Area of Convection – January 26th, 2013

Enhanced image

Track of Area of Convection - January 26th, 2013 © Univ. of Wisconsin

Track of Area of Convection

The area of convection previously located near 19.8S 41.3E, is now located near 19.5S 40.1E (click here for previous images), approximately 390 nm west of Antananarivo, Madagascar. The system is actually situated by the coast of Mozambique, which can be seen through the convection in the full image due to the use of the Chelys Satellite Rapid Response System (SRRS) “borders” feature.

Animated multispectral satellite imagery depicts an elongated low-level circulation center (LLCC) with isolated deep convection flaring over the west quadrant. An SSMI 37 ghz image indicates only weak, shallow convective banding wrapping loosely into the LLCC.

A ASCAT image shows an elongated circulation center with 20 to 25 knot winds; some stronger winds were indicated over the southern semi-circle but were surrounded by rain-flagged data. Upper-level analysis indicates a generally unfavorable environment with moderate (20 to 25 knots) vertical wind shear.

The system is located west of an anticyclone and is under diffluent, easterly flow; however, poleward and equatorward outflow remain limited. Maximum sustained surface winds are estimated at 20 to 25 knots. Minimum sea level pressure is estimated to be near 1005 mb. The potential for the development of a significant tropical cyclone within the next 24 hours remains low.

New Borders Feature in Action – January 27th, 2013 – EOSnap Celebrates its 6000th Post!

22.5N 31.7E

January 27th, 2013 Category: Clouds, Image of the day, Lakes

Egypt and Sudan – January 26th, 2013

Bolivia and Peru – January 26th, 2013

Mozambique – January 26th, 2013

USA – January 26th, 2013

Egypt, without borders

EOSnap celebrates our 6000th post by focusing on the new “borders” feature of the Chelys Satellite Rapid Response System (SRRS). The feature allows users to download satellite images that show not only a true, traditional view of the terrain below, but also the borders of countries. The feature is particularly useful for seeing the outline of land despite cloudcover. It can also be used to show the location of lakes.

In the main image, the border between Egypt and Sudan is clearly visible as a horizontal line. The contours of Lake Nasser, which would otherwise be invisible except for its southern tip due to heavy cloud cover (see thumbnail image “Egypt, without borders” for a look at the original, borderless image), are easily distinguishable, highlighted in blue. The thumbnail image of Mozambique shows the country’s shoreline despite an area of convection, in this case a potential area of cyclone formation, looming over the coast. The thumbnail image of Bolivia and Peru focuses on Lake Titicaca, and clearly shows where the lake is divided between the two countries. The thumbnail image of southern USA, in addition to sediments from the Mississippi River, shows the border between Louisiana (right) and Texas (left), as well as the Toledo Bend Reservoir, despite the thick clouds covering the upper half of the image.

Area of Convection Continues Near Madagascar and Mozambique

January 22nd, 2013 Category: Tropical Storms

Area of Convection – January 21st, 2013

Enhanced image

Track of Area of Convection - January 21st, 2013 © Univ. of Wisconsin

Track of Area of Convection

The area of convection previously located near 24.7S 37.5E (click here for previous images) is now located near 23.6S 38.8E, approximately 535 nm southwest of Antananarivo, Madagascar, and east of Mozambique. In the full image, the outline of the coast of Mozambique can be observed in grey, through the convection.

Animated infrared satellite imagery depicts an exposed low-level circulation center (LLCC) with deep convection sheared southeast of center. A WINDSAT 37 ghz image indicates shallow convective banding wrapping tightly into an elongated LLCC. An ASCAT image depicts a highly asymmetric wind field with 30 to 35 knot winds. Upper-level analysis indicates that the LLCC is located east of the subtropical ridge and is embedded within the upper-level trough.

The system is under strong northwesterly vertical wind shear (20 to 30 knots) and is positioned just equatorward of the subtropical jet and strong northwesterly flow (50 to 70 knots), which is providing excellent poleward outflow. The system is assessed as subtropical and has potential to transition into a warm-core system within the next two to three days as it tracks slowly eastward.

Dynamic models indicate that the subtropical ridge will re-build over the LLCC and the total precipitable water imagery indicates a deep moisture core sufficient for further development. Maximum sustained surface winds are estimated at 30 to 35 knots. Minimum sea level pressure is estimated to be near 1000 mb. The potential for the development of a significant tropical cyclone within the next 24 hours remains medium.