Wednesday, October 4, 2017

Image of the Day October 5, 2017

This is my image of Venice, Italy for my image of the day for October 5, 2017. I thought this image was interesting because there are no roads or cars in Venice. I have visited Venice before so it makes sense to me that I would only see boats, water, and canals, but if someone were analyzing this image without knowing it was in Venice, it may be more difficult to figure out where in the world there are no roads. The color and block texture of the red brick buildings distinguish themselves from the smooth blue/greens of the surrounding Adriatic Sea. The white streaks in the water are boats. It is also worth noting that there is almost no green space on the large, main island. The buildings are tightly packed close to each other, but in the lower part of the image you can see a bit more green space. The green space is distinguishable not only because of the dark green colors, but also because of the coarse texture of the trees in these areas. According to the website where I found this image, Venice has been having issues with flooding and high tides. In my opinion, this may be because of climate change. In any case, this image is important because it depicts the entirety of the city, and makes it easy to see which parts of the city are most affected by the flooding. Knowing these parts of the city also makes it easier to figure out where flood prevention methods are needed.

Tuesday, October 3, 2017

Image of the Day, October 4th, 2017



This series of images from 2006, 2008, and 2009, respectively, shows Lake Delton near the Wisconsin Dells. After a period of extensive flooding on June 9th, 2008, the  lake was entirely drained as the  floodwaters eroded away a new stream to the Wisconsin River, bypassing the dam which historically created Lake Delton.  It had a large rippling effect on the local economy, as  the tourism-driving lake was still drained for the entire 2008 summer. Soon, the new stream bed was filled with dirt, and the lake returned to its historical levels. The event still lives on in many's memories, especially for the several home owners that had their properties washed away as the stream eroded its new course to the Wisconsin River. 

Monday, October 2, 2017

Image of the Day October 3, 2017

Photo: Lake Natron, Northern Tanzania
Date: March 6th, 2017
Satellite: Landsat 8 - Operational Land Imager (OLI)
True Color Image

Landsat 8- OLI true color image of a reddish-pink lake in Norther Tanzania. Red lakes are not common, which begs the question: why is this lake reddish-pink? Lake Natron's shallow waters are known for it's pink and red hues. The lake's uniquely warm temperatures (125 - 140 degrees Fahrenheit), salty, and alkaline chemistry is due to the volcanic activity in the area. Considered inhospitable for many organisms, haloarchaea, also known as salt-loving extremophile microorganisms, and cyanobacteria produce reddish-pink pigments that give the lake its rich pink and red color. These extremophile microorganisms provide an important food resource for the endangered Lesser Flamingo. During the dryer seasons, more than two million Lesser Flamingos use this area for protected nesting grounds, because there are no predators due to the formation of protected channels of the extreme lake chemistry. Lake Natron's high salt and bicarbonate chemistry received press, in recent years, for the calcified birds and bats found and photographed in 2013. Most scientists agreed that these animals died of natural causes and became "calcified" by being coated with sodium carbonate, due to their remains being in close proximity of the lake.