Atmospheric C02

Right above the tree tops -- where most people might think there is just air -- Prof. Dan Yakir sees a distinctive atmospheric layer in which all sorts of complex exchanges are taking place. CO2, of course, is one of the important ones, and we still don’t understand all of the ins and outs of its flux through the forest, soil and atmosphere. Moisture, heat (and by extension light) and oxygen all cycle through the interface between the forest canopy and the lower atmosphere, as do a number of volatile organic compounds (VOCs) released by many trees. These compounds may contribute to the…

These guys are as adept with a lug wrench as they are with a mass spectrometer. Prof. Dan Yakir (second from right) and members of his group had to become licensed truck drivers to operate their newest equipment - which is all packed into a custom-built truck for hauling around the country. Until now, Yakir and his team have been working from the Yatir station - a fixed tower set in a pine forest on the edge of the Negev desert. This station is part of a global network that continuously measures carbon exchange and other nutrient cycles in different forest settings. Now, he and his team will…

Three news items were posted on our site today. The first is on two papers by a group in Spain. Normally we don't publicize papers that are not written by Institute scientists, but these are a special case. They appear to have clinched the claims of a Weizmann scientist that one can treat stroke and head trauma without trying to get drugs into the brain. The treatment would consist of upping the levels of a naturally-occurring enzyme in the blood; one of these papers showed that levels of this enzyme in the blood tests of stroke patients were the best predictor of their chances of recovery.…

Today's guest blogger is Prof. Dan Yakir. Until recently, Yakir was head of the Environmental Sciences and Energy Research Department at the Institute, and he heads the Yatir Forest research station, which monitors, among other things, carbon exchange in a man-made semi-arid pine forest. This piece comes in the wake of the worst fire in Israel's history, in which extreme drought, winds and a long fire season that depleted fire retardant supplies combined to flame a few embers into a major conflagration that burned thousands of acres of natural scrub forest.Tens of human lives were lost, many…