nature's swamp cooler : research: two neighborhoods, one lush with greenery the other more paved and unshaded, are the focus of a new study on the cooling influence of trees and plants. - air and water swamp cooler

by:HICOOL     2019-07-26
nature\'s swamp cooler : research: two neighborhoods, one lush with greenery the other more paved and unshaded, are the focus of a new study on the cooling influence of trees and plants.  -  air and water swamp cooler
The canopy of towering cedar, oak, eucalyptus and palm trees covers the winding residential streets of Acadia around the Los Angeles County botanical garden.
Bed of Ivy rose and lily
The green lawn is surrounded by thick oleander.
In the south, near the St. Gabriel mission, there are fewer and fewer trees, the lawn is smaller and smaller, and the Bushes are sparse, neat and single along the street.
Family homes, apartments, shops and office buildings.
An innovative study on the effects of tree and plant cooling is looking at these two blocks to prove that urban greening provides more than just eyes --
Beautiful environment, correct environment-
In fact, it can cool the whole community to the point where people can turn off the air conditioning a little.
"Obviously, it would be better if you were sitting in the shade ---and cooler--
If you're sitting in the sun, "said Paul R.
Doose is leading a team of scientists at Rosemead.
Edison based in Southern California
He said that it is not obvious, nor does it know much about the amount of water released by urban vegetation and its indirect cooling benefits ---
In other words, can the sweat of the tree cool down.
In addition, he says there is little conclusive data on how trees and plants affect the weather of a block and how they make it cold in warm months.
So, from a utility point of view, it might be cheaper to plant trees or financially reward consumers for planting trees, instead of building expensive power plants that fuel air conditioners, he said.
Edison will spend $200,000 to $300,000 this year, with the help of American Scientists, starting the study in the San Gabriel Valley in the WestS.
Forest Services and Indiana University.
The utility company to 50,000-square-
Within a mile of the border from viefield to Mexico, the study is planned to be extended over the next four years to a wider area of Southern California, from mountains to deserts to the sea.
Next year, meteorologists plan to visit the Long Beach and San Fernando Valley to see the contrast between the coastal area and the Inland Valley.
Palm Desert and San Bernardino may be the sights of the future.
For Edison, if the company decides to launch a tree planting plan, the results will help the company to state its reasons in front of state regulators, Doose said.
"The reason why this project is so important is that it is the first time it sees the indirect benefits of vegetation in urban communities," said Daniel G . ".
Arcadia Levitt
A Forest Service research meteorologist based on the project.
Over the years, research has shown that it is easier for cities to maintain heat than in rural areas because asphalt and building materials absorb and keep warm, and this effect is called "urban heat island ".
"Other studies have looked at the climate created by farmland and forests.
However, this study will look at urban microclimates rather than measuring and comparing large area areas that can be produced within the same urban area by changing greening.
No city study "would be so detailed", says Sue Grimmond, a meteorologist at Indiana University who is directing part of the project and studying the effects of urban vegetation in VancouverC.
Sacramento and Chicago
From a meteorological point of view, "We know very little about the behavior of the whole block," Grimmond said . ".
When Levitt looked at a large eucalyptus tree near the Botanical Garden, he explained in specific terms the possible effects of vegetation.
A eucalyptus tree can emit 100 gallons of water a day, he said.
A ripe oak tree, he says, could send out up to 50 gallons of water a day, an orange tree with thick leaves, and 10 gallons.
The large amount of water released into the air will have a considerable cooling effect on the climate around the house, and will also help the overall cooling of the community.
It works just like the way sweat cools people: water evaporates and absorbs some heat in the process.
"It's like there's a big swamp cooler nearby," Levitt said of the impact of tree, Bush and plant life . ".
Because Southern California tends to have dry, relatively low humidity weather during warmer months, he says, this "natural" swamp cooler can work very effectively without producing so much moisture, so that the air becomes uncomfortable and humid.
This study pays special attention to the upward flow of water from the evaporation of lawns, shrubs, plants and trees.
In the first study, the area of both communities was about 1 square mile.
An Arcadia-centered part of the Los Angeles County between Pasadena and Arcadia.
The other is located in the San Gabriel and Alhambra.
The two were chosen because of the huge contrast of green. -
So eye-catching that it appears on a photo taken from a space satellite.
In each community, researchers set up a series of weather station towers on two levels: one in the residential backyard 6 to 10 feet high to measure the local area, and the other at 100 feet above the top of the tree, measure the entire block.
Both types of stations will measure moisture from irrigation and swimming pools as well as trees and other plants, a process called evaporation.
Radio stations connected to meteorologists computers via modems and telephone lines record daily detailed weather information about temperature, humidity, wind and solar radiation.
In addition, four college students were conducting a field survey in the community of the western valley of San Gabriel this summer, including two towers.
The Indiana University team is working on 25 different communities to compare the differences between trees, plants and shrubs, and enrich more regional weather pictures of inland valleys.
This broader study is looking at the contrast between Marina's vast lush estates and the shaded industrial streets of South Elmont.
In the east, the study went deep into Monrovia;
In Altana in the north;
South, Monterey Park and West, Pasadena.
To help understand how urban features capture or reflect heat from sunlight, the survey is evaluating the percentage of streets, sidewalks and lanes in an area, the type of roof and building materials, the color of the House and other buildings.
An examination of green plants may help to determine which plants release the most moisture with minimal watering.
All this information will be used to help create accurate portraits of nearby weather and can be entered into computer and mathematical models of Southern California Edison.
Scientists are still collecting their data and have not analyzed it.
The assumption is that the difference is small, but essentially because of the contrast of vegetation, says Levitt.
Still, he said, "If you have two blocks, the temperature difference is said to be only 2 degrees, which will still have a big impact on energy conservation.
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