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New study finds COVID-19 hotspots in Canadian urban centers

A new study identifies COVID-19 hotspots in Canadian cities across four provinces, with concentrations of cases linked to social determinants of health such as income, housing and visible minority status. The study calls for city-specific public health supports tailored to communities at disproportionate risk of COVID-19.

SourceCanadian Medical Association Journal·JournalCanadian Medical Association Journal·TypeObservational study·DateFeb 14, 2022

As the mercury rises, the urban heat penalty grows, especially at night

Residents in eastern US cities experience up to 4.9 degrees Celsius increase in nighttime urban heat stress index, with extra 30 minutes of uncomfortable weather per degree C temperature increase. This effect is more pronounced in the southeastern US, where residents face up to five extra hours of uncomfortable weather during summer.

SourceDOE/Pacific Northwest National Laboratory·JournalGeophysical Research Letters·TypeData/statistical analysis·DateDec 16, 2021

Night lights: New global atlas maps out artificial light at night under the sea

A new global atlas reveals that up to 1.9 million km2 of the world's coastal waters are affected by artificial light at night, with significant impacts on marine organisms. The study uses a novel metric to determine the depth of light penetration and highlights the need for further research into the effects of ALAN pollution.

SourceUniversity of Plymouth·JournalElementa Science of the Anthropocene·TypeExperimental study·DateDec 14, 2021

Extreme weather research shows household income impacts of Hurricane Katrina and Superstorm Sandy, need for more equitable climate resilience planning for cities

A new analysis found that low-income households in New Orleans lost nearly 35% of their income after Hurricane Katrina, while high-income households in NYC lost only 5.8%. The study highlights the need for diversified income sources to mitigate economic harm from extreme weather events.

SourceIllinois Institute of Technology·JournalApplied Geography·DateDec 14, 2021

Environmental injustice, population density and the spread of COVID-19 in minority communities

Researchers found that population density and long-term exposure to air pollution were the two factors most significantly correlated with COVID-19 transmission rates. Disproportionately affecting communities with more minority residents, these factors were identified through computer modeling and analysis of data from 12 metropolitan a...

SourceWashington University in St. Louis·JournalEnvironmental Research Letters·TypeComputational simulation/modeling·DateOct 19, 2021

In Guatemala, archaeologist from Brown helps to uncover hidden neighborhood in ancient Maya city

A recent discovery at Tikal reveals a previously unknown neighborhood designed to replicate Teotihuacan's citadel, sparking new insights into the interaction between the two civilizations. Excavations found evidence of occupation and surveillance, as well as artifacts linking Tikal to Teotihuacan's imperial power.

SourceBrown University·JournalAntiquity·TypeComputational simulation/modeling·DateSep 28, 2021

UTSA develops model to understand how a city’s design creates congestion

The UTSA-Glasgow model analyzed nearly 100 American cities to understand the relationship between city design and traffic congestion. It found that high-intensity urban land use and polycentric city shapes are associated with higher levels of congestion, supporting the long-held belief that traffic congestion is tied to urbanization.

SourceUniversity of Texas at San Antonio·JournalComputers Environment and Urban Systems·TypeData/statistical analysis·DateSep 22, 2021

Europe-wide political divide emerging between cities and countryside – study

A new study reveals a deepening geographical fracture in European societies, with rural areas showing lower trust in politics but higher voting rates. The research suggests that mainstream politicians must address feelings of disconnection from politics and provide economic opportunities to re-engage residents of small towns and villages.

SourceUniversity of Cambridge·JournalCambridge Journal of Regions Economy and Society·TypeData/statistical analysis·DateAug 17, 2021

Ancient Maya reservoirs contained toxic pollution

Researchers found toxic levels of mercury and blue-green algae in ancient Maya reservoirs, suggesting droughts may have contributed to the city's abandonment. The pollutants made the water toxic to drink, even if boiled, highlighting the importance of understanding environmental factors in ancient civilizations.

SourceUniversity of Cincinnati·JournalScientific Reports·DateJun 26, 2020

Does 'participatory budgeting' lead to political patronage?

A study by NYU Wagner found that participatory budgeting in NYC has led to smaller, more numerous capital projects and potentially increased political patronage. The process allows citizens to determine priorities for public spending, but the analysis suggests that city legislators may be using it to dispense patronage instead.

SourceNew York University·JournalAdministration & Society·DateApr 30, 2020

Turning Phoenix green

A study by Arizona State University found that urban agriculture can meet 90% of Phoenix's current annual fresh produce consumption. The city could also increase green space by 17% and reduce CO2 emissions by displacing energy use equivalent to 6,000 homes.

SourceArizona State University·JournalEnvironmental Research Letters·DateSep 30, 2019

New research casts doubt on cause of Angkor's collapse

Researchers have long debated the causes of Angkor's demise, but new evidence suggests that land use declined gradually over 100 years before the supposed collapse. The study shows that forest disturbance and soil erosion decreased, and the moat was eventually covered in floating vegetation, indicating a lack of maintenance.

SourceUniversity of Sydney·JournalProceedings of the National Academy of Sciences·DateFeb 25, 2019

New algorithm provides a more detailed look at urban heat islands

A new algorithm developed by Yale Ph.D. student TC Chakraborty creates a more comprehensive and consistent estimate of urban heat islands worldwide. The Global Surface UHI Explorer map uses urban agglomerations instead of administrative city boundaries, providing surface UHI intensity estimates for over 10,000 urban clusters.

SourceYale School of the Environment·JournalInternational Journal of Applied Earth Observation and Geoinformation·DateDec 7, 2018

Violent crime rates rise in warmer winters

A CU Boulder study found a surprisingly strong correlation between warmer winters and higher violent crime rates in the US. The research used powerful climate analysis techniques to investigate year-to-year fluctuations in climate and crime rates, revealing a strong relationship between temperature and crime in winter months.

SourceUniversity of Colorado at Boulder·JournalGeoHealth·DateNov 13, 2018