Top Downloaded Articles This Week: Global Biogeochemical Cycles http://www.agu.org/contents/journals/ViewPublishedToday.do en-us AGU http://blogs.law.harvard.edu/tech/rss webmaster@agu.org Dissolved zinc in the subarctic North Pacific and Bering Sea: Its distribution, speciation, and importance to primary producers http://dx.doi.org/10.1029/2010GB004004 Rachel Wisniewski Jakuba, Mak A. Saito, James W. Moffett and Yan Xu Global Biogeochemical Cycles 26 Spatial and temporal variability of biogenic isoprene emissions from a temperate estuary http://dx.doi.org/10.1029/2011GB004210 D. A. Exton, D. J. Suggett, M. Steinke and T. J. McGenity Global Biogeochemical Cycles 26 Historical land use change and associated carbon emissions in Brazil from 1940 to 1995 http://dx.doi.org/10.1029/2011GB004133 Christiane Cavalcante Leite, Marcos Heil Costa, Britaldo Silveira Soares-Filho and Letícia de Barros Viana Hissa Global Biogeochemical Cycles 26 Decrease of dissolved oxygen after the mid-1980s in the western North Pacific subtropical gyre along the 137°E repeat section http://dx.doi.org/10.1029/2011GB004227 50% of the DO decrease. In the NPIW core at roughly 26.8 σθ (∼700 m), the decline in DO was attributable to the DO decrease in the formation region. In the OML between 27.0 σθ and 27.3 σθ (∼1000 m), the DO decrease likely resulted from an increase in westward transport of low O2 water due to strengthening of the subtropical gyre. The result of this study shows the importance of the long-term and high-frequency along the 137°E repeat section.]]> Yusuke Takatani, Daisuke Sasano, Toshiya Nakano, Takashi Midorikawa and Masao Ishii Global Biogeochemical Cycles 26 13C constraints on ocean carbon cycle models http://dx.doi.org/10.1029/2010GB003980 Rolf E. Sonnerup and Paul D. Quay Global Biogeochemical Cycles 26