Scientists aboard our ship the MV Arctic Sunrise measure the thickness of the Arctic sea ice.

Today we're expecting an announcement from the National Snow and Ice Data Centre - the US body that monitors the Arctic - about the 'seasonal low' of Arctic sea ice for 2009.

Every year, the Arctic sea ice - the floating cap of frozen ocean that sits over the north of the planet - shrinks and grows with the seasons. In the Arctic summer it melts away and gets smaller, in winter it grows and get bigger. It being mid-September we've just passed the height of Arctic summer, and today the NSIDC will tell us how small the ice cap got this year.

The Arctic Sunrise is in Greenland to survey melting glaciers and observe the effects of climate change. In this latest update from the tour, Indian journalist Gaurav Sawant decribes his experiences aboard and ponders the implications for the sub-continent. But first web editor Juliette sets the scene...

India seems (and is) quite far away from Greenland and the Arctic. Yet, with the world's second largest population and with major cities like Mumbai (parts of which lie just a few metres above sea level), the country cannot ignore what is happening. India is now a major player in international politics. If its population and leaders start making climate change the political priority, the world will listen.

You may have already seen this on our Making Waves blog, but for the sake of completeness (and to help demolish the climate denial zombie that's risen once more) here's Brian's piece on the arctic sea ice controversy.

The right-wing, conservative, climate-denial blog-and-twitosphere is abuzz with the news: Greenpeace admits live on the BBC that it lied about arctic melting.

That's not true, it's being promoted by the handful of global warming skeptics still standing, and we're hitting back. You can help us by tweeting, blogging, and sharing this clarification on Facebook. Read more »

Just in via our Climate Rescue weblog, here's a beautiful little filmic essay on the realities of climate change from Greenpeace China campaigner Xin Yu (otherwise known as "Fish"), made aboard the Arctic Sunrise during the current expedition to monitor a 100 km² ice island breaking off Greenland's Petermann glacier.

More breathtaking images just in from Nick Cobbing, aboard the Arctic Sunrise in Greenland, where the crew are working with leading climate scientists to monitor the break-up of the Petermann Glacier.

Photographer Nick Cobbing's spectacular photos from the Arctic Sunrise's Arctic expedition are featured on the Telegraph website here. Take a look, for ice sheets, kayaking along meltwater rivers, and polar bears in their natural habitat.

The MV Arctic Sunrise off Greenland © Greenpeace/Morton

Dave is onboard the Arctic Sunrise, heading north up the coast of Greenland.

Blue and white icebergs are looming through the sea mist as I write this, from the campaign office of the Arctic Sunrise, in Baffin Bay. Our ship - an old sealing vessel - is just south of the wonderfully named Disko Island, or Qeqertarsuaq, off the west coast of Greenland. A seal just popped its head up, to check out who is passing by. And we just crossed the Arctic Circle.

A glacial melt lake in Greenland.

It's becoming pretty obvious that the aviation industry is creeping closer and closer to the tactics of big tobacco and big oil in their attempts to "teach the controversy" over science that doesn't suit their profit margins.

Last week, it was an outrageous display of bullying aimed at groups concerned about climate change. A couple of weeks ago, there was another, smaller episode that got a lot less press; the aviation industry's briefing against an Inuit leader who came to the UK to tell his "southern neighbours" that the people of the Arctic are already feeling the impacts of climate change.