2013 BGCWG Workshop Presentations Update on BGCWG Activities Keith Lindsay, NCAR-CGD Ocean biogeochemistry in the CESM 1.2 Keith Moore Using ocean biogeochemistry models to predict biogenic contributions to sea spray: Concept and preliminary results Susannah Burrows Photosynthesis onset regulation of mid-summer climate James Randerson, UC-Irvine 20th Century carbon dynamics in CLM4.5 and CLM4.0 Charlie Koven Shifting terrestrial nitrogen pathways in response to changing agricultural practices Stuart Riddick River N transport in CLM - RTM Cynthia Nevison Ecosystem carbon variability in CCSM4.0 ensembles Danica Lombardozzi Global evaluation of CMIP5 earth system models in simulating leaf area index using remote sensing products Jiafu Mao Simulating soil microbial physiology in CLM Will Weider, NCAR-CGD Development of a microbial module: CLM-Microbe in CESM, framework and preliminary results Xiaofeng Xu