据NASA哥达德空间飞行中心的科学家小组提供的一份位告,北极平流层的大部和北中纬度可能具有极点臭氧消失的先兆。化学反应把含氯化合物的如氯化氢转变为更容易起反应的元素如一氧化氯。这些化学反应发生在极点平流层云层的粒子表面,云层仅在平流层温度低于-108F时才能形成。三维地球模式包括与输送过程效应(该效应随平流层风系统伴生)一起发生的化学反应效应。它们使哥达德小组能够模拟平流层中氯化氢在地球上的分布。通过 According to a note from a group of scientists at the NASA Goddard Space Flight Center, most of the Arctic stratosphere and north-central latitudes could have the harbinger of extreme ozone depletion. Chemical reactions convert chlorine-containing compounds such as hydrogen chloride to more reactive elements such as chlorine monoxide. These chemical reactions occur on the surface of the particles in the stratospheric clouds that only form when the stratospheric temperature is below -108F. The three-dimensional Earth model includes the chemical reaction effects that occur with the transport process effects that accompany the stratospheric wind system. They enable the Goddard team to simulate the distribution of hydrogen chloride in the stratosphere on Earth. by