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| 1 | Simulating global soil-CO_2 flux and its response to climate change显示文摘It has been argued that increased soil respiration would become a major atmospheric source of CO\-2 in the event of global warming. The simple statistical models were developed based on a georeferenced database with 0 5°×0 5° longitude/latitude resolution to simulate global soil\|CO\-2 fluxes, to investigate climatic effects on these fluxes using sensitivity experiments, and to assess possible responses of soil\|CO\-2 fluxes to various climate change scenarios. The statistical models yield a value of 69 PgC/a of global soil\|CO\-2 fluxes for current condition. Sensitivity experiments confirm that the fluxes are responsive to changes in temperature, precipitation and actual evapotranspiration, but increases in temperature and actual evapotranspiration affect soil\|CO 2 fluxes more than increases in precipitation. Using climatic change projections from four global circulation models, each corresponding to an equilibrium doubling of CO 2, it can be found that the largest increases in soil\|CO 2 fluxes were associated with the boreal and tundra regions. The globally averaged soil\|CO 2 fluxes were estimated to increase by about 35% above current values, providing a positive feedback to the greenhouse effect. | PENG Chang\|hui 1* , Michael J. Apps\+2 (1 Ontario Forest Research Institute, Ministry of Natural Resources, 1235 Queen Street East, Sault Ste. Marie, ON P6A 2E5,Canada. E\|mail: pengc@gov.on.ca 2 Morthern Forestry Center, Canadian Forest Serv | 2000 | Journal of Environmental Sciences2000，12，3： | 2 |
| 2 | Association of type and duration of diabetes with erectile dysfunction in a large cohort of men显示文摘 | ON CG HU FB GIOVANNUCCI E et 01 | 2002 | Diabetes Care2002，25，8： | 1 |
| 3 | UKPDS 50:risk factors for incidence and progression of retinopathy in Type II diabetes over 6 years from diagnosis 显示文摘 | STRA13'ON I M KOHNER E M ALDINGTON S J | 2001 | Diabetologia2001，44，2： | 1 |
| 4 | Dynamic external fixation for distal radius fracture显示文摘 | DIENST M WOZASEK G E SELIGS ON D | | 0，，08： | 1 |
| 5 | Beta-glucan in- corporated into a fruit drink effectively lowers serum LDL- cholesterol concentrations显示文摘 | Naumann E van Rees AB Onning G | 2006 | Am J Clin Nutr2006，83，3： | 1 |
| 6 | Toxic Effects wth, and Survival of Red Pagrus major Embryos and Larvae显示文摘 | Huang W Cao L Shan X of Zinc on Sea Bream of E (1): the Development Gro J | 2010 | Archives nvironmental Contamination and Toxicology2010，58，： | 1 |
| 7 | Magnetic anomalies in the Pacific and sea floor spreading显示文摘 | Pitman W C III Hen'on E M Heirtzler J R | 1968 | Journal of Geophysical Research1968，73，： | 1 |
| 8 | Effectiveness of the diabetic foot risk classification system of the International Working Group on the Diabetic Foot显示文摘 | Peters E J Lavery LA International Working Group on the Diabetic Foot | | 0，，08： | 1 |
| 9 | The effect s of positive affect on unusualness of word as sociations显示文摘 | Isen A M Johns on M S Mertz E | 1985 | Journal of Personality and Social Psycholoy1985，48，： | 1 |
| 10 | 显示文摘 | MARTIN C CAROL A E RENEE A E Effects of Irradiance on Crassulacean Acid Metabolism in the Epiphyte Tillandsia usneoides L | 1986 | Plant Physiol1986，80，： | 1 |
| 11 | coli 显示文摘 | Brown R Klaus D Todd E Effects of space flight clinorotation and centrifugation on the substrate utilization efficiency of E | 2001 | Microgravity - Science and Technology2001，13，4： | 1 |
| 12 | the hydrogenation of basis of a coke formation kinetics-investigations in an isothermal catalytic wall reactor显示文摘 | KLEMM E AMON B Deactivation kinetics in nitrobenzene to aniline on the REDLINGSHOFER H | 2001 | Chemical Engineering Science2001，56，4： | 1 |
| 13 | lnfluenee of calcium hydroxide intraeanal medication on bond strength of two endodontic resin-based sealers assessed by micropush-out tes显示文摘 | Oarvalho ON Bauer J Ferrari PHP e% al | | Den trauma%ol0，201，29： | 1 |
| 14 | 显示文摘 | Kimura T Effect of Potassium Concentration on the Grain Orientation in Bismuth Sodium Potassium Titanate | 2002 | J Am Ceram Soc2002，856，： | 1 |
| 15 | Continuous detoxification,transformation and degradation of nitrophenol in upflow anaerobic sludge blanket(UASB)reactors显示文摘 | Don]on B A Bazo-Flares E Lettiga G | 1996 | Biotechnology and Bioengineeting1996，51，： | 1 |
| 16 | A plastic-damage model for concrete 显示文摘 | Lubliner J Oliver J Oiler S and On ate E | 1989 | International Journal of Solids and Structures1989，25，3： | 1 |
| 17 | UKP- DSS0 : risk factors for incidence and progression of retinopathy in type Ⅱ diabetes over 6 years from diagnosis 显示文摘 | STRATI?ON I M KOHNER E M ALDINGTON S J | 2001 | Diabetologia2001，44，2： | 1 |
| 18 | Hydroxylation of 1-naphthol by hydrogen peroxide over UL-TS-1 and TS-1 coated MCF显示文摘 | UNGUREANU A TRONG ON D DUMITRIU E | 2003 | Applied Catalysis A: General2003，254，2： | 1 |
| 19 | population study of urinaryin- contimence and noctufia among women aged 20 - 59 years, p reva- lence, well2 being and wish for treatmentl显示文摘 | Samuels on E Victor A Tibblin GIA | 1997 | Acta Obstet Oynceob Scand1997，76，： | 1 |
| 20 | Aforced aerati on systems for composting waste water sludge显示文摘 | EPSTEIN E WILLS ON G B BURGE W D | 1976 | Journal WPCF1976，48，4： | 1 |
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