Satellites – “not good enough to tell us global temperature”, but apparently good enough to tell us global climate sensitivityFirst of all, the paper is about ecosystem sensitivity not climate sensitivity in the temperature sense. That is, how the different ecosystems around the world are responding to climate variability and change, not how much temperature will increase with a doubling of CO2.
Remember that video produced a few weeks ago from the usual suspects that says satellite data is no good for climate data? Others in science don’t seem to think so.
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| Figure 1 | Global map of the Vegetation Sensitivity Index (VSI), a new indicator of vegetation sensitivity to climate variability using satellite data. Red colour shows higher ecosystem sensitivity, whereas green indicates lower ecosystem sensitivity. Grey areas are barren land or ice covered. Inland water bodies are mapped in blue. Source: U Bergen |
Secondly, the satellite-derived data is from the imaging spectroradiometer (MODIS), and shows vegetation changes. It's not from the Advanced Microwave Scanning Radiometer (AMSR-E) or other microwave scanning instrument, used to measure "brightness temperature" or the radiance of the microwave radiation of the atmosphere, from which air temperature in different layers of the air is estimated).
