Page 14 - Tree Ring Research News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Department of Forest and Conservation Sciences, Faculty of Forestry, University of British Columbia, Vancouver, BC, Canada In the 2017 and 2018, 2.55 million hectares burned across British Columbia, Canada, including unanticipated large and high-severity fires in many dry forests. To transform forest and fire management to achieve resilience to future megafires requires improved understanding historical fire frequency, severity, and spatial patterns. Our dendroecological reconstructions of 35 plots in a 161-hectare study area in a dry Douglas-fir forest revealed historical fires that burned a...

Pretty good news.

KEY CONCEPTS Carbon dioxide (CO2) and temperature go hand in hand. The more CO2 we pump into the atmosphere, the more our planet warms. Once emitted, much CO2 remains in the atmosphere for hundreds to thousands of years, making it a powerful influence on the long-term warming trend.  According to data from NOAA, daily peak CO2 reached just over 421 ppm (parts per million), up from 417 ppm last year at Mauna Loa. It’s not just the record CO2 levels, but also the record pace. The Carbon Skyscraper graph focuses on CO2 change rates over the last 800,000 years, capturing the incredible speed a...

Mesa Verde National Park (MVNP) in what is today southwestern Colorado is a UNESCO World Heritage site dedicated to the preservation and presentation of the amazing cliff dwellings and other structures built and used by Ancestral Puebloans from roughly A.D. 600 until the end of the 13th century. Visitors to spectacularly beautiful sites such as Cliff Palace and Spruce Tree House find them mesmerizing, unforgettable, and thought-provoking. These and other cliff structures were handmade with millions of sandstone blocks, thousands of wooden beams for roofing elements, and copious amounts of ado...

The African baobab ( Adansonia digitata) is the only non-conifer ever recorded to reach in excess of 2,000 years old. As they do not produce wood with crossdatable rings, they can only be dated through the use of radiocarbon dating. The Panke Baobab in Zimbabwe, which had a circumference of 25.5 m (83 ft 7.9 in) and had nearly 400 m3 (14,126 cu ft) of wood and bark, was at least 2,450 (±40) years old when it collapsed and died in 2011. This not only makes it the oldest hardwood tree to be accurately measured but also the oldest known angiosperm (flowering plant). Several other individuals of...