Stories tagged Twin Cities

Feb
13
2013

The Science Museum of Minnesota is a partner with the University of Minnesota on its Islands in the Sun project, which is monitoring the urban heat island in the Twin Cities to find ways of lessening its effects through landscape design. More than half the global population now lives in cities and so there is urgent need to understand and mitigate urban heat islands, especially during heat waves when the risk of heat-related illness and mortality can increase dramatically.Islands in the Sun temperature sensor
Islands in the Sun temperature sensorCourtesy Courtesy Department of Soil, Water and Climate, University of Minnesota

Islands in the Sun is setting up temperature sensors throughout the Twin Cities Metro Area. This temperature network when completed will be one of the densest in the world. Would you like to be a part of this effort? Islands in the Sun is especially interested in volunteers willing to have a sensor installed on their property and who live in the following locations -- downtown Minneapolis, downtown Saint Paul, Saint Paul – east of Rice St, West Saint Paul, South Saint Paul, Mendota Heights, Inver Grove Heights, Eagan, Oakdale, Woodbury, Cottage Grove, northern Roseville, Arden Hills, and Plymouth.

Information about the sensor and its placement can be found here. If you are still interested after reviewing this information, then fill out and submit a volunteer form. Please note that your interest does not guarantee that a sensor will be installed because each site must meet certain criteria. If selected, a temperature sensor will be installed at a location on your property acceptable to you with the expectation that it will remain onsite collecting data for up to four years. A technician will visit the sensor every two to three months to download data.

Thanks for considering being a part of this ground-breaking research project.

Sep
11
2011

There I was, sitting on my back porch enjoying the last days of summer, when I heard a sound--"zzzzzZZZZzzzzz"--first once, then again, and finally a third time in short succession. I heard coming from the trees the songs of the cicadas.

The cicada is a large (1-2 inches long) insect with a rather scary looking appearance.

The name cicada comes from Latin meaning "tree cricket" and while they aren't directly related to crickets, they are just as harmless.

About two weeks ago, as I was carrying something out to my car, I noticed a cicada in the process of shedding its exoskeleton to become an adult. You see, a cicada spends years underground as a nymph, feeding on the roots of various plants. After a certain number of years pass by (13 for some, 17 for other species) they emerge from their earthen nursery and climb up the nearby plants to get out of the reach of predators. Afterward, they molt their larval exoskeleton and become an adult. I couldn't believe my luck to have a cicada molting before my very eyes.

When I first noticed it, I saw something pink hanging from my tree. The exoskeleton had already split down the back and the newly adult cicada was climbing out of its old shell, all pink with spring green wings instead of black or brown. Initially, the wings were small green bumps on its back, but as they dried, the wings extended to their normal size. I was disappointed that I couldn't stay and watch its color change while the exoskeleton hardened, because that would also have been cool to see.

Cicadas are a rather delicate and sensitive insect. If the environmental conditions aren't just right with regards to pollution, acidity and temperature, when they emerge the cicadas will be deformed and often sterile. With this in mind, remember that while they might appear to be scary-looking, cicadas are quite harmless and actually a natural sign that the area in which you live is healthy.

Image courtesy of Bruce Marlin
Image location http://en.wikipedia.org/wiki/File:Magicicada_species.jpg.