"chrome" behaves strangely much like the NW
metallic does depending upon lighting conditions.
In this case there was probably quite a snowfield underneath, with clouds in front and sun (perhaps even slightly overcast) behind the photographer. The snow acts as a giant reflector card like in studio photography. It essentially eliminates the shadows, and the polished aluminum reflects the snow itself. The top reflects the clouds above/below it.
These conditions are actually very tricky to photograph in but you can get some awesome looking results. White planes turn as white as the snow itself. On a more average color scheme, these are the results you tend to get.
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Photo © Dan Vincent - New England Airports