On The Radio- Crops increasing, biodiversity decreasing


3623153374_cc4e8eba62_o.jpg
Corn fields (flickr/ Tom)

Kasey Dresser| March 25, 2019

This weeks segment looks at decreasing biodiversity in crops around the world. 

Transcript:

The number of crops grown around the world has increased, yet crop biodiversity has declined. 

This is the Iowa Environmental Focus. 

Species richness, the number of unique species present in a defined area, often represents true biodiversity poorly. It discounts species evenness, which measures the relative proportion of each species’ population in the whole community. 

Even though 156 crops are grown globally — up from the mid-20th century — overall biodiversity is low because just four types of crops cover about 50 percent of cropland. A new study from the University of Toronto found that corn, rice, wheat, and soybeans dominate industrial agriculture around the world despite differences in climate and culture.

This impacts the affordability and availability of culturally significant foods in certain areas and leaves the global food supply increasingly vulnerable to pests and diseases. 

Increasing crop variety will make our food supply more resilient to pests and potentially reduce hunger.

For more information, visit iowa-environmental-focus-dot-org.

From the UI Center for Global and Regional Environmental Research, I’m Sara E. Mason.

On The Radio- Detecting algal blooms


8552224878_bf02f82fa6_o.jpg
Algal blooms in Lake Erie (michiganseagrant/flickr)

Kasey Dresser| February 4, 2019

This weeks segment looks at new technology for detecting harmful algal blooms.

Transcript:

Scientists may soon be able to detect harmful algal blooms from the sky. 

This is the Iowa Environmental Focus. 

A team of researchers at the University of Iowa is developing a drone to detect harmful algal blooms in lakes and reservoirs. It will use remote sensing to collect aerial data with special infrared cameras. Currently, water samples are collected to monitor and detect harmful algae and toxins. 

The most common toxin-producing algae in Iowa is blue green algae, or cyanobacteria. It can cause rashes, gastrointestinal and respiratory problems for beachgoers. Last summer this toxin contaminated drinking water in Greenfield, Iowa. The drone will hopefully make detecting harmful algal blooms easier and allow monitors to catch them sooner.

The project is being funded by a seed grant from the University of Iowa Center for Health Effects of Environmental Contamination, a research center which focuses especially on water quality issues in the state. 

For more information, visit iowa-environmental-focus-dot-org.

From the UI Center for Global and Regional Environmental Research, I’m Sara E. Mason.

A database of every tree in Iowa City


AR-190129697.jpg&MaxH=500&MaxW=900.jpeg
Tree found in Willow Creek Park (Stephen Mally/The Gazette)

Kasey Dresser| January 28, 2019

This month Iowa City published a data base of the 49,863 trees it maintains. On the interactive website, the trees are assessed on location, size, species and environmental benefit. Residents can engage with the website and search specific neighborhoods to find trees in your area.

Iowa City Parks and Recreation Department, Director Juli Seydell Johnson said, “The main benefit for residents is they can see the information that we have. For us, it’s about planning. We want to have diverse tree canopy in the city.”

A data base of the trees also tracks the environmental impact. Right now, Iowa City trees save $455,600 in energy and $221,000 in air quality. The trees also avoid more than 10 million pounds of carbon pollution and 55 million gallons of stormwater runoff.

If you’re interested to learn about the trees in your neighborhood, the data base can be found here.

On The Radio- Climate change and crop production


13752499703_e202bff99e_o.jpg

This weeks segment looks at how increased temperature and precipitation will affect crop production in the Midwest. 

Transcript:

Increasing temperatures and precipitation will affect crop yields in the Midwest.

This is the Iowa Environmental Focus.

The Midwest, often referred to as the breadbasket of America, is a major producer of corn, soybeans, and wheat. Rising temperatures and greater precipitation threaten farmer’s livelihoods.  

According to the Fourth National Climate Assessment, Midwestern states are expected to warm up more than any other region in the U.S. Currently, the Iowa average annual 5-day maximum temperature during a heat wave is in the range of ninty to ninty-five degrees Fahrenheit. 

Now U.S. climate scientists are projecting that by mid-century, five-day heat wave temperatures in Iowa will increase by about seven degrees Fahrenheit for the average year and by thirteen degrees Fahrenheit once per decade compared to heat waves in the late twentieth century.  

Higher average temperatures increase the rate of evaporation from soil and plant leaves, leaving the land dry and arid and potentially damaging crop yields. Longer spells of high heat pave the way for droughts. The newly dryer land is then unable to properly soak up water from heavy rainfall, creating more flooding scenarios.

For more information, visit iowa-environmental-focus dot org.

From the UI Center for Global and Regional Environmental Research, I’m Sara E. Mason.

On The Radio- Benefits of passive building design


4864582489_a1d346407b_o.jpg
Green roof (picture taken off the Sears Tower in Chicago, IL)

Kasey Dresser| December 3, 2018

This weeks segment looks at how implementing passive design can improve energy efficiency. 

Passive design can improve energy efficiency on a warming planet.

As climate change heats up Iowa, how will people stay cool without increasing energy demand? The answer may lie in something called passive design. 

This is the Iowa Environmental Focus. 

Scientists project Iowa heatwaves to become, on average, 7 degrees hotter by mid-century, according the 4th U.S. National Climate Assessment.  About once per decade, a heatwave 13 degrees hotter may occur. 

In such events, people rely heavily on cooling systems. In many cases, this means cranking up the air conditioning, and therefore increasing utility bills and our dependence on fossil fuels.

Passive design techniques include how the building is oriented, window placement, roofing material, tree shading and more. All help maintain comfortable temperatures year round by letting sunlight in and shading it out at the appropriate times.  Tightly sealed insulation minimizes the exchange of air with the outdoors.

Passively designed buildings reduce energy demand and are more comfortable environments to live and work in.

For more information, visit iowa-environmental-focus-dot-org.

From the UI Center for Global and Regional Environmental Research, I’m Sara E. Mason.

On The Radio- Crop enhancement at night


4776960195_6ccdac4309_o.jpg
Photo taken at a farm in Colorado (David Mulhern/flickr)

Kasey Dresser | October 15, 2018

This weeks segment looks at a study that tracks how nighttime airflow can affect crops.

Transcript: 

A new study in Illinois aims to improve crops by tracking how air moves at night.

This is the Iowa Environmental Focus.

When the earth loses heat at night, sometimes cool layers of mostly still air form just above the surface. These pockets of air are called stable boundary layers, and scientists still know very little about how they flow.

They do know, however, that the subtle movements of stable boundary layers have important implications for agriculture. Understanding nighttime air flow could help farmers decide when to use anti-frost fans for example, and could minimize drift of aerosol pesticides.

Researchers from the University of Illinois and the University of South Carolina will track this elusive phenomenon by releasing smoke and then using lasers to measure how it flows. They will also log atmospheric conditions like cloud cover and temperature to learn what exactly causes stable boundary layers to form.

The study, funded by the National Science Foundation, began mid-September and will run through November 15th.

For more information, visit iowa-environmental-focus-dot-org.

From the UI Center for Global and Regional Environmental Research, I’m Sara E. Mason.

The Iowa Climate Statement 2018


Press conference_Ulrike and Schnoor
Ulrike Passe (left) and Jerry Schnoor answer questions about the Iowa Climate Statement.

Natalia Welzenbach-Marcu and Kasey Dresser | October 11, 2018

The Iowa Climate Statement 2018: Designing Buildings and Communities for Iowa’s Future Climate was released earlier today at the Cedar Rapids Public Library. The statement was announced by Jerry Schnoor, the co-director of the University of Iowa’s Center for Global and Regional Environmental Research, and Ulrike Passe, Associate Professor of Architecture at Iowa State University.

good img 2
Ulrike Passe (left) and Jerry Schnoor read the climate statement and answered questions

The eighth annual statement, “Iowa Climate Statement 2018: Designing Buildings and Communities for Iowa’s Future Climate,” released Thursday, October 11 was signed by a record 201 science faculty and researchers from 37 Iowa colleges and universities. The statement describes the urgent need to fortify our building and public infrastructure from heat and precipitation and looks to the future weather of Iowa, suggesting ways to improve Iowa’s buildings to suit those changing weather patterns.

IMG_2816
The climate statement holds a record number of signers
ExtremeWeather_SocialMedia-widespread Iowa precip
Extreme precipitation is just one factor influencing this year’s climate statement topic

Iowa_Climate_Statement_2018_documents_and_graphics

Watch the press conference on our Facebook page

Read the climate statement