| | Datum: | 20.07.11 | | Titel: | worldclimatereport.com v. 19.07.2011: Earth Getting Greener, not Browner | | Link: | www.worldclimatereport.com/index.php/2011/07/19/earth-getting-greener-not-browner/ | | Details1: | A new study in Scienceexpress (Science magazine’s pre-paper-publication outlet) by Yude Pan of the U.S. Forest Service and colleagues finds that the net carbon sink in terrestrial forest systems across the globe has been expanding, taking up ever more carbon dioxide from the earth’s atmosphere. (A “sink” is a place where something—carbon dioxide, heat, water, etc…winds up.)
The net carbon sink in the world’s forests is made up of carbon uptake less carbon loss. Carbon (C) uptake is expressed as bigger trees and more dense forests, storage in leaf litter, dead wood, wood products, and in the soil. Carbon loss occurs through deforestation and burning. By analyzing “recent inventory data and long-term field observations coupled to statistical or process models” Pan et al. conclude that “the global net forest C sink was 1.0 ± 0.8 and 1.2 ± 0.9 PgC yr–1 for 1990-1999 and 2000-2007”—indicating that the terrestrial forest sink has been at least consistent, if not expanding, over at least the past 18 years (1990-2007). A “Pg” is a Petagram, which is 1 followed by 15 zeroes worth of constant grams. For comparative purposes, our federal deficit is 14 followed by 12 zeroes worth of inflating $$$.
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