冰岛气旋

A cyclone is a low-pressure area of winds that spiral inwards. Although tropical storms most often come to mind, these spiraling storms can also form at mid- and high latitudes. Two such cyclones formed in tandem south of Iceland in November 2006.
NASA/Jesse Allen

The Moderate Resolution Imaging Spectroradiometer flying aboard NASA’s Terra satellite took this picture of two cyclones near Iceland on Nov. 20, 2006. Though we usually think of cyclones occurring in the tropics, these spiraling storms can also form at mid- and high latitudes. Cyclones at these latitudes are actually fairly common, and they drive much of the Earth’s weather.

Image credit: NASA/Jesse Allen

气旋是一种向内螺旋上升的低压风区。虽然人们最常想到的是热带风暴，但在中高纬度地区也会形成这种螺旋状的风暴。2006年11月，两个这样的气旋在冰岛南部同时形成。
影像来源: NASA/Jesse Allen

2006年11月20日，搭载在NASA的泰拉卫星上的中分辨率成像光谱仪拍摄了冰岛附近的两个气旋的照片。虽然我们通常认为气旋发生在热带地区，但这些螺旋风暴也可能形成于中高纬度地区。这些纬度地区的气旋实际上相当常见，它们决定了地球的大部分天气。

影像来源: NASA/Jesse Allen