Your surface temperature is 20 degrees C. Your friend in a…
Your surface temperature is 20 degrees C. Your friend in a hot air balloon up at 1 km informs you that the air temperature up there is 13 degrees C. Since 20-13=7, you know that the atmosphere’s ELR is 7 c/km (which happens to fall between between the DALR and the SALR rates of 10c/km and 5c/km). Since the ELR falls between the DALR and SALR, you are able to make the following determination about the layer’s stability:
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