亚马逊热带雨林碳循环.pptVIP

3.6 ENSO to sink-source Figure 2 Net ecosystem production across the Amazon Basin. Spatial variability in net ecosystem production (gCm-2 yr-1) in the combined simulation of transient climate and transient atmospheric CO2 during three phases of El Nino/Southern ※ red 、borrow 、yellow —source Blue、green —sink 9.6-6.2-2.2=1.2μ mols-1m-2 4、Prospect If the earth?had no?”lung”? A 2009 study found that a 4 °C rise in global temperatures by 2100 would kill 85% of the Amazon rainforest while a temperature rise of 3 °C would kill some 75% of the Amazon. It concludes that the forest is on the brink of being turned into?savanna?or?desert, with catastrophic consequences for the worlds climate. Reference [1] M. Keller .et al.,2001. Investigating the Carbon Cycle of the Amazon Forests[J].GLOBAL CHANGE,45:15-19. [2] J.E. Richey. et al.,2001. Land Use Changes and the Biogeochemistry of River Corridors in Amazon[J]. GLOBAL CHANGE,45:19-22. [3] Hanqin Tian.et al.,1998. Effect of interannual climate Variability on carbon storage in ecosystems[J].NATURE,396:664-667. [4] Weile Wanga.et al.,2013. Variations in atmospheric CO2 growth rates coupled with tropical temperature[J]. PNAS,110(32):61-66. [5] John Grace.et al.,1995.Carbone Dioxide Uptake by an Undisturbed Tropical Rain Forest in Southwest Amazonia，1992 to 1993[J].Science,New Series,270(5237):778-780. [6] R. A. Houghton.et al.,2000. Annual ˉuxes of carbon from deforestation and regrowth in the Brazilian Amazon[J].NATURE,403(20):301-304. [7] 徐小锋等.气候变暖对陆地生态系统碳循环的影响[J]. Journal ofPlant Ecology, 2007,31(2):175-188. [8] 范广洲.亚马逊流域生态系统生理过程对气候变化的影响[J].中国造纸学报增刊,2004,444-446. The carbon cycle of Amazon rain forest? content Regional profile 1 Analysis of necessity 2 3 Prospect 4 The?influencing?factors?of carbon cycle 1 Regional profile Amazon drainage basin Satellite image?from?NASA. The Amazon represents over half of the planets remaining?rainforests,20% of the total forest area Amazonian forests are estimated to have accumula