ITV news Aral Sea hype - Dennis Ambler wants answers
ITV news joined in the nonsense tonight with a report that included flying out their "environmental" reporter to stand up to his waist in Lake Chad. http://itn.co.uk/news/45bfb608fcc3ee64dffa946e017fb951.html
I suppose they bought some carbon credits...
I sent this response to their newsoom direct email:
"urgent re: global warming maps
I have to inform you that there are serious faults with your report on satellite maps.
In particular the report about the Aral Sea does not reflect the real situation, which can be seen here from the NASA website: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17634
"In 2000, the Aral Sea was in grave condition. This inland sea, which was once Earth’s fourth-largest lake, had been steadily shrinking since the 1960s, when Soviet-era irrigation projects diverted the main rivers sustaining the sea. The lake shrunk to a quarter of its original size in a few decades, creating an environmental and public health disaster. As the lake dried up, winters became colder and harsher, and summers became hotter and more arid. Blowing dust, laden with pesticides and other chemicals, is routinely scoured from the dry lake bed and poses a severe public health hazard.
In 2007, however, the North Aral Sea was enjoying a renaissance, due the construction of a dam in 2005 that prevents water from flowing into the South Aral Sea. This pair of images acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite shows the recovery of the Aral Sea between April 15, 2005 (bottom), and April 14, 2007 (top). The recovery is most dramatic in the upper right part of the image, although a close look at the lake’s borders show a general rise in water level throughout the lake. Much of this recovery actually occurred in the first year after the dam was completed.
Lake Chad has receded many times before, as described in Wikipedia:
Because it is very shallow — only 10.5 metres (34 ft) at its deepest — its area is particularly sensitive to small changes in average depth, and it consequently also shows seasonal fluctuations in size.
Lake Chad is believed to be a remnant of a former inland sea which has grown and shrunk with changes in climate over the past 13,000 years. At its largest, around 4000 BC, this lake is estimated to have covered an area of 400,000 km². Lake sediments appear to indicate dry periods, when the lake nearly dried up, around 8500 BC, 5500 BC, 2000 BC, and 100 BC.
It was one of the largest lakes in the world when first surveyed by Europeans in 1823, but it has shrunk considerably since then. An increased demand on the lake's water from the local population has likely accelerated its shrinkage over the past 40 years. This is largely due to overgrazing in the area surrounding the lake, causing desertification and a decline in vegetation.
In the 1960s it had an area of more than 26,000 km², making it the fourth largest lake in Africa. By 2000 its extent had fallen to less than 1,500 km². This is due to reduced rainfall combined with greatly increased amounts of irrigation water being drawn from the lake and the rivers which feed it, the largest being the Chari/ Logon system, which originates in the mountains of the Central African Republic. The lake presently has an average depth of only 1.5 metres (5 ft). It nearly dried out in 1908 and again in 1984.
This history shows no relationship to the claims in Laurence's report and has no connection with any perceived global warming, particularly in 1908 and the BC years.
A further report from NASA shows that the changes in the Yellow River are again nothing to do with perceived global warming.
"Over the past 15 years, several hundred square kilometers of sediment have accreted and eroded from the delta coastline. Two major factors contribute to the changes. The river carries a heavy sediment load, leading to clogged channels and frequent river course changes; and the river is heavily engineered and water demand is greater than supply, resulting in little flow to the coast in recent years. In response to these dynamics, a new channel was cut near the tip of the delta in 1996. Photographs collected by astronauts over the years provide a time series that demonstrate both the scale and specific locations of coastal change. Documentation of current delta changes—including coastal development along the Yellow River several other rapidly changing coastlines— continues from the International Space Station."
I am sure you would not wish to persist with a report which has so many flaws, as it is easily shown to be embarassingly wrong in its efforts to promote anthropogenic global warming. As the footage is on the web site, it is easily dissected."
I await a response, but am not holding my breath!