Next time some irrationalist complains about a skeptic sponsored list, that includes scientists that are not climatologists, saying such lists are irrelevant, show them this. Show them also the unspoken pressure that some signers have worried about.
From The Times (emphasis mine):
Top scientists rally to the defence of the Met Office

Julia Slingo, (posing in front of “deep black” the Supercomputer) the Met Office’s chief scientist, insisted that no one was pressured to sign its petition
The Met Office has embarked on an urgent exercise to bolster the reputation of climate-change science after the furore over stolen e-mails.
More than 1,700 scientists have agreed to sign a statement defending the “professional integrity” of global warming research. They were responding to a round-robin request from the Met Office, which has spent four days collecting signatures. The initiative is a sign of how worried it is that e-mails stolen from the University of East Anglia are fuelling scepticism about man-made global warming at a critical moment in talks on carbon emissions.
One scientist said that he felt under pressure to sign the circular or risk losing work. The Met Office admitted that many of the signatories did not work on climate change.
…
One scientist told The Times he felt under pressure to sign. “The Met Office is a major employer of scientists and has long had a policy of only appointing and working with those who subscribe to their views on man-made global warming,” he said.
…
Benny Peiser, of the Global Warming Policy Foundation, which claims man-made climate change has been exaggerated, said the petition showed that the Met Office was rattled.
Complete story here at The Times: Top scientists rally to the defence of the Met Office