That is, they have so much asphalt and concrete that they absorb and hold heat much more readily than surrounding less developed areas. Since then, however, most climate scientists have adopted data that have been adjusted for this effect, which you can see every night on the TV news forecast. If they're calling for temperatures from 15 to 25 degrees, the 15 is for the grassy suburbs and ex-urbs. The 25 is for the warmer cities. Those ice lumps are NOT the same as the glaciers.
Ice shelves are ice masses that are floating on water but anchored to a land-based sheet of ice.
As a result, when one of those puppies cracks off, it doesn't change sea levels at all because it was already floating. We only here about global warming in the US when we have a warm winter or summer, we do not here about when it is cooler. When we are experiencing this warmth, are their other parts of the world experiencing unusual colder weather. So far this century, some areas have warmed and others have cooled. Moreover, the warming has been highly uneven.