Is Ian McEwan a global warming denier in denial?

How would you like to go on a freebie to the Arctic Circle for a couple of weeks? Here's the deal: all your travel expenses are taken care of; you stay on a beautiful old sailing ship, most likely in some remote, picturesque bay far off the tourist map; you'll see killer whales and polar bears, possibly even the odd narwhal; you'll get to zoom around the pristine wilderness on skidoos; your food is prepared by a top Italian chef; there's lashings of booze (albeit rather heady North African...