高度植被绿化趋势的气候控制和皮纳图博效应
Wolfgang Lucht1, I Colin Prentice, Ranga B Myneni
1Potsdam Institute for Climate Impact Research, Post Office Box 601203, D-14412 Potsdam, Germany. Wolfgang.Lucht@pik-potsdam.de
Science (New York, N.Y.)
|June 1, 2002
概括
一个植被模型显示高北度的绿化是由温度变化驱动的. 该模型还预测,由于暂时的冷却,皮纳图博火山爆发后的气温下降.
科学领域:
- 地球系统科学 地球系统科学
- 生态生态学 生态生态学
- 气候科学 气候科学
背景情况:
- 卫星观测表明,在过去二十年中,高北度地区的绿化趋势在不断增加.
- 1991年皮纳图博火山爆发导致全球显著降温,影响生态系统.
研究的目的:
- 开发和验证植被动态的生态化学模型.
- 调查气候变化的影响,包括火山爆发,在高度的植被.
- 了解观察到的绿化趋势和火山爆发后植被变化的驱动因素.
主要方法:
- 利用了生态化学模型的植被.
- 纳入观察到的气候数据,包括温度和火山爆发后的冷却.
- 模型预测与卫星观测的植被趋势进行了比较.
主要成果:
- 该模型成功预测了高北度的绿化趋势.
- 模拟模型重现了早些时候的春季芽和增加的叶面积,主要是由温度变化驱动的.
- 在1992-1993年,模拟了植被生长的明显挫折,与皮纳图博火山喷发的冷却效应一致.
- 预计异构呼吸和净初级产生的不同反应会影响高度CO2吸收.
结论:
- 生物地质化学植被对温度的反应是高度绿化的主要驱动因素.
- 火山爆发,通过暂时的冷却,可以导致植被趋势的显著,可观测的挫折.
- 该模型提供了关于北方生态系统中气候,植被和碳循环之间的复杂相互作用的见解.
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