一、由探照灯衍生的气象观测器第二次世界大战期间,为了防备空袭,夜间使用探照灯将城市上空照亮。战后,这种探照灯在美国大多处理给民间,被研究人员用来进行大气观测。他们观测的主要对象大多是直径在土微米左右,在大气中到处漂浮并随风移动的“气溶胶”的漂移微粒。光束照到这种气溶胶上时发生散射,就能看到它们的浓淡和运动。从某种意义说以这种气溶胶为示踪物,就可以观测大气的情况。 I. Weather Observatory Derived from Searchlight During World War II, in search of air raids, searchlights were used at night to illuminate the city. After the war, this searchlight was mostly handled in the United States to the private sector and was used by researchers to conduct atmospheric observations. The main targets of their observations are mostly “aerosols” of drift particles that float about the Earth’s micron, float around in the atmosphere and move in the wind. The light beam shines on this aerosol, scattering, you can see their shades and movements. In a sense, this aerosol tracer, you can observe the atmosphere.