Breaking News
April 23, 2019 - Neuroscientists propose new theory about amyloid precursor protein connection in Alzheimer’s
April 23, 2019 - Mediterranean diet protects against overeating and obesity
April 23, 2019 - NUS scientists uncover novel biomarkers linked with ‘chemobrain’
April 23, 2019 - Novel ECCITE-seq technique expands multimodal single cell analysis
April 23, 2019 - Half of all American workplaces offer health and wellness programs
April 23, 2019 - Perinatal Complications Tied to Childhood Social Anxiety
April 23, 2019 - Research reveals how immune cells help tumors escape body’s defenses
April 23, 2019 - UAB receives $17 million grant to explore immune cells in inaccessible tissues of the human body
April 23, 2019 - Opening blocked arteries may be lifesaver for older heart attack patients
April 23, 2019 - Yposkesi chairman to speak on ‘Manufacturing and the CDMO Perspective’ at Cell and Gene Meeting
April 23, 2019 - Listeria Outbreak Linked to Deli Meats, Cheeses in 4 States
April 23, 2019 - Scientists find another way HIV can hide from vaccines
April 23, 2019 - EU ban on ‘meaty’ names for veggie food products would affect public sector
April 23, 2019 - KNAUER self-tests gender pay gap one month after Equal Pay Day
April 23, 2019 - Johns Hopkins study reports overdiagnosis of schizophrenia
April 23, 2019 - New approach to repair defects in fetal membranes could prevent life-long medical conditions
April 23, 2019 - Reviving the heart’s regenerative capacities using microRNAs
April 23, 2019 - New pediatric blood pressure guidelines can better predict kids at higher risk of heart disease
April 23, 2019 - Second HIV remission patient rekindles cure hope
April 23, 2019 - Sparse Treatment Options Complicate Cancer Care For Immigrants In South Texas
April 23, 2019 - Hole-forming protein could help control cancer growth
April 23, 2019 - Study examines factors associated with low use of hearing aids among older Hispanic/Latino adults
April 23, 2019 - Changes to Medicare rules could support care innovation for dialysis
April 23, 2019 - Cancer patients requiring emergency department care have better outcomes at original hospital
April 23, 2019 - Potential of liquid biopsy in cancer biomarker detection and prenatal testing
April 23, 2019 - Researchers identify circulating proteins associated with progression of diabetic kidney disease
April 23, 2019 - Microglia play vital role in regulating neuroinflammation, research shows
April 23, 2019 - Pfizer and Lilly Announce Top-Line Results From Long-Term Phase 3 Study of Tanezumab in Patients With Osteoarthritis
April 23, 2019 - One-month regimen noninferior for preventing HIV-related TB
April 23, 2019 - Educational program for preschoolers successful in instilling heart healthy behaviors
April 23, 2019 - Asia’s diabetes epidemic increases risk of death among women, middle-aged people
April 23, 2019 - First-of-its-kind study highlights lethal impact of medical emergencies worldwide
April 23, 2019 - Workshop explores the future of artificial intelligence in medical imaging
April 23, 2019 - Research shows mindful body awareness training helps women recover from drug addiction
April 23, 2019 - Researchers are developing brand-new method to cure brain tumors
April 23, 2019 - Torrent Pharmaceuticals Limited Expands Voluntary Nationwide Recall of Losartan Potassium Tablets, USP and Losartan Potassium/Hydrochlorothiazide Tablets, USP
April 23, 2019 - First case of person without the protein needed to transport vitamin D identified
April 23, 2019 - Precision-guided anticancer nanoparticles help enhance treatment of peritoneal tumors
April 23, 2019 - Smoking cessation during pregnancy associated with reduced risk of preterm birth
April 23, 2019 - Researchers discover why women get autoimmune diseases far more often than men
April 23, 2019 - New Medicare reimbursement rules provide some relief to safety-net hospitals
April 23, 2019 - Sensory Sensitivity Tied to Constipation in Young Children
April 23, 2019 - More than half of internal medicine graduates choosing primary care
April 22, 2019 - Researchers discover good news for fish populations living on bleached coral reefs
April 22, 2019 - Plant-based diets associated with lower risk of heart failure
April 22, 2019 - Food Allergies Can Strike at Any Age
April 22, 2019 - Cerebro-facio-thoracic dysplasia – Genetics Home Reference
April 22, 2019 - Poverty leaves a mark on our genes
April 22, 2019 - Countdown to Big Data in Precision Health: When industry and academia converge
April 22, 2019 - The U.S government may account for up to $37.8 billion due to opioid epidemic
April 22, 2019 - Improving ACA’s Insurance Coverage Provisions will lead to better care for patients
April 22, 2019 - Study identifies possible therapeutic effects of curcumin on stomach cancer
April 22, 2019 - Hyaline fibromatosis syndrome – Genetics Home Reference
April 22, 2019 - Scientists use CRISPR for possible ‘bubble boy’ therapy
April 22, 2019 - Hematologist (and a mom, singer, actress and much more) stands up for diversity
April 22, 2019 - Novel AI voice tool can help diagnose PTSD
April 22, 2019 - Physical activity may eliminate mortality risk caused by sedentary behavior
April 22, 2019 - Overlooked part of cell’s internal machinery may hold key to treating acute myeloid leukemia
April 22, 2019 - Nursing, medical, and dental students train together to improve pediatric oral health
April 22, 2019 - Soft bedding responsible for majority of sleep-related infant deaths, study reveals
April 22, 2019 - Study finds worse health-related quality of life among transgender adults
April 22, 2019 - MIT scientists reverse some behavioral symptoms of rare neurodevelopmental disorder
April 22, 2019 - Scientists find new therapy target for drug-induced liver failure
April 22, 2019 - Opioid dose variability could lead to increased risk of overdose, study suggests
April 22, 2019 - Newly developed model predicts salmonella outbreaks several months in advance
April 22, 2019 - Deep-learning model better predicts survival outcomes for lung cancer
April 22, 2019 - One in Three U.S. Adults Aged 35 to 44 May Have Drinking Problem
April 22, 2019 - Why the measles virus is so contagious
April 22, 2019 - Magnet ‘Zap’ to the Brain Might Jumpstart Aging Memory
April 22, 2019 - Immune response to gut microbes may be early indicator of type 1 diabetes
April 22, 2019 - Destination Limbo: Health Suffers Among Asylum Seekers In Crowded Border Shelter
April 22, 2019 - Research shows how dopamine contributes to sex differences in worms
April 22, 2019 - Marijuana users weigh less compared to non-users
April 22, 2019 - Research uncovers critical RNA processing aberrations in ALS and FTD
April 22, 2019 - Many cancer patients use marijuana and prescription opioids, study reveals
April 22, 2019 - Frailty may up fracture risk in patients with type 2 diabetes
April 22, 2019 - Study provides new insight into how obesity, insulin resistance can affect cognition
April 22, 2019 - Study seeks to better understand the genetic causes for hypospadias
April 22, 2019 - FDA grants approval of first generic naloxone nasal spray to treat opioid overdose
April 22, 2019 - FDA authorizes marketing of first medical device to treat ADHD
Study shows extreme heat events in both summer and winter are increasing across the U.S., Canada

Study shows extreme heat events in both summer and winter are increasing across the U.S., Canada

image_pdfDownload PDFimage_print

A new study shows extreme heat events both in the summer and in the winter are increasing across the U.S. and Canada, while extreme cold events in summer and winter are declining.

A new study in the in Journal of Geophysical Research: Atmospheres, a publication of the American Geophysical Union, examined absolute extreme temperatures–high temperatures in summer and low temperatures in winter–but also looked at relative extreme temperature events–unusually cold temperatures and unusually warm temperatures throughout the year.

The new study found both relative and absolute extreme heat events have increased across the US and Canada since 1980. This upward trend is greatest across the southern US, especially in the Ozarks and southern Arizona, as well as northern Quebec. That means there are more extremely hot days during the summer as well as more days that are considered extremely hot for the time of year, like abnormally warm days in the winter.

The new research also found both relative and absolute extreme cold events are decreasing, most notably in Alaska and Northern Canada, along with patches along the US Atlantic coast. In these areas, there are fewer instances of temperatures that are extremely cold either compared to the normal range, like in winter, or for the time of year, like unusually cold days in the summer.

Global mean surface temperature, the most frequently cited indicator of climate change, has been steadily increasing since the 1970s. However, temperature extremes pose a greater ecological risk to many species than average warming, according to the study’s authors.

The new study is one of the first to explore relative extreme temperature events, which are changing more rapidly than absolute temperature extremes, and can have important implications for the environment, agriculture and human health, according to Scott Sheridan, professor in the department of geography at Kent State University and lead author of the new study.

“Typically for this kind of research we look at the highest temperatures in the summer and lowest temperatures in the winter. But we’ve also seen that extreme temperatures that are really anomalous for the time of year can have a high impact–these relative extremes are important and underappreciated,” he said.

Investigating temperature extremes

To investigate how extreme temperature events have been changing over time, Sheridan and his co-author conducted a climatology of cold and heat events, both absolute and relative, for North America, followed by an analysis of how they have changed from 1980-2016.

Relative extreme temperature events are changing faster than absolute extreme events, and often occur outside of seasonal norms, according to the new study. In the eastern half of the US, relative extreme heat events occur as early as mid-winter into early spring. Out-of-season extreme temperatures can cause early thaws in mild winters or catch vulnerable populations unprepared and unacclimated.

Across parts of the Arctic, extreme cold events have become almost entirely nonexistent and increasingly difficult to identify, according to the researchers.

“Relative temperature anomalies can trigger what are called phenological mismatches, where a mismatch in the temperature and the season can cause trees to bloom too early and birds and insects to migrate before there is appropriate food,” Sheridan said.

Most notable is the highly anomalous warm event in March 2012, which included persistent mid-summer warmth in multiple locations. The event produced a ‘false spring’ in which vegetation prematurely left dormancy, so that it was not prepared for subsequent frosts, leading to large agricultural losses in certain areas, according to the researchers.

There is some evidence that early-season heat events are more hazardous to humans than heat events later in the season. When people are not acclimatized to hotter temperatures, they are more vulnerable to negative health impacts, especially the elderly, infants, young children, and people with chronic health problems or disabilities, according to the researchers.

The study clearly underlines the importance of not just looking at high temperatures in the summer but also looking at relative temperatures, said Kristie Ebi, professor of Environmental and Occupational Health Sciences at the University of Washington, who was not involved in the study.

“Using information generated in the study on regional patterns in extreme weather events, particularly relative extremes in temperature, early warnings could be issued that include information on what people can do to protect themselves and to protect crops and ecosystems,” Ebi said.

Tagged with:

About author

Related Articles