Ping Zhang and Marc Imhoff explain the Urban Heat Island Effect - where dense urban development raises ambient temperatures dramatically above the surrounding land - for the AGU conference 2010. Note that because these are street trees, the data reports very low densities in Fairmount Park in the City’s northwest. The next compliment to this analysis would include some form of variation that would allow us to observe what would have happened to temperatures in an area had we not planted a tree.One great avenue to generate a quasi-experimental setting would be to use data from We could use these data to compare temperature changes around areas that requested and planted a tree (treatment group) to areas that requested but never planted a tree (control group).In response to continued climate change and sea-level rise, increased urban migration will require new city planning, environmental and public health interventions to lessen the urban heat island effect.
This ‘streetcar suburb’ has long been known for its tree lined streets and active park areas. To get the best experience possible, please download a compatible browser. On July 27, 2016, On that hot Wednesday in July, it seemed the only places to catch a break from the heat was Fairmount Park again, to the City’s northwest or Pennypack Park in the northeast.As a better demonstration of how much surface temperatures can vary across the City, the image below shows areas that were estimated to be warmer than the stated 93 degree high on that day. There are many reasons for UHIs. Though the two cities have the same approximate size, Providence has a significantly stronger heat island. Though the two cities have the same approximate size, Providence has a significantly stronger heat island. The campaigns are part of a broader effort to improve information and decision-making to reduce heat risk across the nation. ), sum of street length (ft.), park area (sq. One way is to grab weather station data from the very wonderful Landsat data is at 30 meter resolution which makes it too coarse to detect what you ate for lunch today in the park, but certainly big enough to look at temperature differences across the City. and total impervious surface (sq. The image below is an NDVI for Philadelphia. In cities, this heat is absorbed by built environment features like streets, parking lots and rooftops and reflected back on to weary city-dwellers whose only respite is water ice and Super Soakers.Below we’ll take a look at land surface temperature maps in Philadelphia derived from Landsat satellite imagery and we’ll explore the extent to which human interventions, in this case street trees, can help lower temperatures.It is difficult to estimate small changes in temperature across space. As usual, data and spatial analytics can help us better allocate our resources and help ensure a cooler future for our cities. Perhaps there is something to be said for the effect of trees on urban heat islands.It is clear that the density of street trees is at its greatest in Center City and neighborhoods on the periphery including West Philadelphia. This past August, 2016 was the hottest in 136 years according to NASA. The Urban Heat Mapping Viewer enables the exploration of high-resolution surface temperature data for the Adelaide metropolitan area. Urban heat island: Land surface temperature map of Greater Boston area using satellite data. Not surprisingly, it was also created using satellite imagery.The street canopy dataset would give us a true tree census. Heat is created by energy from all the people, cars, buses, and trains in big cities like New York, Paris, and London. The great advantage of analyzing the world by way of satellite imagery, is that we can use traditional raster mapping analytics. The data has to be ‘cleaned’ using a atmospheric correction algorithm and then subjected to several transformations. javascript is enabled.