These come from surface temperature and pressure records as well as balloon and satellite surveys.
这些观测由地表温度和气压记录以及气球、卫星观测组成。
2
NASA's data comes from 1000 meteorological stations around the world, satellite observations of sea surface temperature, and Antarctic research station measurements.
NASA的数据来自全球1000个观测站，观测海洋表面温度的卫星还有南极观测站。
3
Acquired by the Enhanced Thematic Mapper on NASA's Landsat 7 satellite, they show temperature, ranging from blue (warm) to yellow (hot).