Fig. 7
From: Direct retrieval of isoprene from satellite-based infrared measurements

Isoprene concentrations over the Amazonian forest during the GoAmazon flight campaign in September 2014. All data is averaged from the surface to 2 km above ground and mapped on a 0.2° × 0.2° latitude–longitude grid. Plotted are a the CrIS isoprene measurements, b the GoAmazon airborne proton transfer reaction-mass spectrometry (PTR-MS) measurements, and c the CrIS-aircraft correlation. The red dashed line in panel c shows the aircraft-satellite linear fit, while the black dashed line indicates the 1:1 relationship