Modelling the effects of snowpack on heterotrophic respiration across northern temperate and high latitude regions: comparisons with measurements of atmospheric carbon dioxide in high latitudes. - McGuire,A..D..; Melillo,J..M..; Randerson,J..T..; Parton,W..J..; Heimann,M..; Meier,R..A..; Clein,J..S..; Kicklighter,D..W..; Sauf,W.. (Biogeochemistry, 2000)