GLOBAL CHANGE BIOLOGY 2000 Vol.6 No.1

1. Global and regional modelling of Arctic-boreal vegetation distribution　 　 and its sensitivity to altered forcing∥T.G.Kittel; W.L.Steffen and F.S. 　 Chapin III.-p1 2. Hierarchical subdivision of Arctic tundra based on　vegetation　response 　 to climate， parent material and topography∥D.A.Walker.-p19 3. Biotic disturbance agents in　the　boreal　forest:　 considerations　for 　 vegetation change models∥Carolyn M.Malstrom and Kenneth F.Raffa.-p35 4. Geographic patterns and dynamics of Alaskan climate interpolated from　a 　 sparse station record∥Michael D.Fleming; F.Stuart Chapin III; Wolfgang 　 Cramer.，etc.-p49 5. The energy and water balance of high-latitude wetlands: controls and 　 extrapolation∥Wayne R.Rouse.-p59 6. Climate and vegetation controls on boreal zone energy exchange∥ Dennis 　 Baldocchi; Francis M.Kelliher; T.A.Black.，etc.-p69 7. Land-atmosphere energy exchange in Arctic tundra and boreal forest: 　 available data and feedbacks to climate∥Werner Eugster; Wayne R.Rouse; 　 Roger A.Pielke Sr.，etc.-p84 8. The controls on net ecosystem productivity along an Arctic transect:　 a 　 model comparison with flux measurements∥Mathew Williams; Werner Eugster; 　 Edward B.Rastetter.，etc.-p116 9. Modelling carbon responses of tundra ecosystems to historical and 　 projected climate: a comparison of a plot- and global-scale ecosystem 　 model to identify process-based uncertainties∥J.S.Clein; B.L. 　 Kwiatkowski; A.D.McGuire.，etc.-p127 10.Modelling carbon responses of tundra ecosystems to historical and 　 projected climate: sensitivity of pan-Arctic carbon storage to temporal 　 and spatial variation in climate∥A.D.McGuire; J.S.Clein; J.M. Melillo.， 　 etc.-p141 11.A scaling approach for quantifying the net (CO2) flux of the Kuparuk 　 River Basin， Alaska∥Walter C.Oechel; George L.Vourlitis; Joseph 　 Verfaillie Jr.，etc.-p160 12.The role of fire in the boreal carbon budget∥J.W.Harden; S.E.Trumbore; 　 B.J.Stocks.，etc.-p174 13.Simulating the effects of climate change on the carbon balance of　North 　 American high-latitude forests∥A.R.Keyser; J.S.Kimball; R. R. Newmani.， 　 etc.-p185 14.Controls over carbon storage and turnover in high-latitude soils∥Sarah 　 E.Hobbie; Joshua P.Schimel; Susan E.Trumbore.，etc.-p196 15.Arctic and boreal ecosystems of western North America as　components　of 　 the climate system∥F.S.Chapin III; A.D.McGuire; J.Randerson.，etc.-p211